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Climate and Average Weather Year Round in Yamagata Japan

In Yamagata, the summers are warm, muggy, wet, and mostly cloudy and the winters are freezing, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 22°F to 81°F and is rarely below 15°F or above 88°F.

Based on the tourism score, the best time of year to visit Yamagata for warm-weather activities is from mid July to early September.

Climate in Yamagata

very coldcoldcoolcomfortablewarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow61%61%34%34%overcastclearprecipitation: 6.1 inprecipitation: 6.1 in1.9 in1.9 inmuggy: 79%muggy: 79%0%0%drydrytourism score: 6.5tourism score: 6.50.00.0
Yamagata weather by month. Click on each chart for more information.

The warm season lasts for 3.0 months, from June 19 to September 19, with an average daily high temperature above 72°F. The hottest month of the year in Yamagata is August, with an average high of 80°F and low of 67°F.

The cold season lasts for 3.4 months, from December 4 to March 16, with an average daily high temperature below 43°F. The coldest month of the year in Yamagata is January, with an average low of 22°F and high of 35°F.

Average High and Low Temperature in Yamagata

Average High and Low Temperature in YamagatawarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2734°FJan 2734°FAug 781°FAug 781°F22°F22°F68°F68°FJun 1972°FJun 1972°FSep 1972°FSep 1972°FDec 443°FDec 443°FMar 1643°FMar 1643°F60°F60°F57°F57°F30°F30°F29°F29°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 35°F36°F44°F56°F65°F71°F77°F80°F73°F62°F51°F40°F
Temp. 28°F29°F36°F47°F57°F64°F71°F74°F66°F54°F42°F33°F
Low 22°F23°F29°F40°F50°F59°F66°F67°F59°F46°F35°F27°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in Yamagata

Average Hourly Temperature in YamagataJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezingfreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Erie, Pennsylvania, United States (6,337 miles away) and Saugus, Massachusetts, United States (6,530 miles) are the far-away foreign places with temperatures most similar to Yamagata (view comparison).

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In Yamagata, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Yamagata begins around September 28 and lasts for 6.6 months, ending around April 15.

The clearest month of the year in Yamagata is November, during which on average the sky is clear, mostly clear, or partly cloudy 59% of the time.

The cloudier part of the year begins around April 15 and lasts for 5.4 months, ending around September 28.

The cloudiest month of the year in Yamagata is July, during which on average the sky is overcast or mostly cloudy 63% of the time.

Cloud Cover Categories in Yamagata

Cloud Cover Categories in YamagataclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 3161%Oct 3161%Jul 234%Jul 234%Sep 2847%Sep 2847%Apr 1548%Apr 1548%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 46%48%49%53%56%61%63%56%55%44%41%43%
Clearer 54%52%51%47%44%39%37%44%45%56%59%57%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Yamagata varies throughout the year.

The wetter season lasts 6.2 months, from June 19 to December 26, with a greater than 39% chance of a given day being a wet day. The month with the most wet days in Yamagata is July, with an average of 14.4 days with at least 0.04 inches of precipitation.

The drier season lasts 5.8 months, from December 26 to June 19. The month with the fewest wet days in Yamagata is February, with an average of 8.4 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Yamagata changes throughout the year.

Rain alone is the most common for 10 months, from February 16 to December 31. The month with the most days of rain alone in Yamagata is July, with an average of 14.4 days.

Snow alone is the most common for 1.4 months, from January 4 to February 16. The month with the most days of snow alone in Yamagata is January, with an average of 4.1 days.

Mixed snow and rain is the most common for 3.0 days, from January 1 to January 4. The month with the most days of mixed snow and rain in Yamagata is December, with an average of 3.6 days.

Daily Chance of Precipitation in Yamagata

Daily Chance of Precipitation in YamagatasnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 851%Jul 851%May 2328%May 2328%Jan 436%Jan 436%Feb 1629%Feb 1629%Dec 2639%Dec 2639%NowNowsnowmixedrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 2.7d2.9d6.5d8.9d9.2d11.2d14.4d12.4d12.4d11.2d11.0d6.5d
Mixed 3.3d2.5d1.7d0.3d0.0d0.0d0.0d0.0d0.0d0.1d1.2d3.6d
Snow 4.1d3.0d0.9d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.3d2.5d
Any 10.1d8.4d9.2d9.2d9.2d11.2d14.4d12.4d12.4d11.3d12.5d12.5d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Yamagata experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Yamagata. The month with the most rain in Yamagata is July, with an average rainfall of 5.8 inches.

The month with the least rain in Yamagata is January, with an average rainfall of 1.0 inches.

Average Monthly Rainfall in Yamagata

Average Monthly Rainfall in YamagataJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inJul 86.1 inJul 86.1 inFeb 10.8 inFeb 10.8 inSep 65.5 inSep 65.5 inMay 33.1 inMay 33.1 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 1.0″1.0″2.0″2.8″3.0″4.3″5.8″5.0″5.3″4.0″3.3″1.9″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Yamagata experiences extreme seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.9 months, from November 10 to April 7, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Yamagata is January, with an average snowfall of 11.8 inches.

The snowless period of the year lasts for 7.1 months, from April 7 to November 10. The least snow falls around July 28, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Yamagata

Average Monthly Snowfall in YamagatasnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 inJan 1511.9 inJan 1511.9 inJul 280.0 inJul 280.0 inNov 101.0 inNov 101.0 inApr 71.0 inApr 71.0 in
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 11.8″8.8″3.9″0.5″0.0″0.0″0.0″0.0″0.0″0.0″1.5″8.7″

The length of the day in Yamagata varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 30 minutes of daylight; the longest day is June 21, with 14 hours, 50 minutes of daylight.

Hours of Daylight and Twilight in Yamagata

Hours of Daylight and Twilight in YamagataJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2014 hr, 50 minJun 2114 hr, 50 minJun 2112 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 30 minDec 219 hr, 30 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 9.8h10.8h12.0h13.2h14.3h14.8h14.5h13.6h12.4h11.2h10.1h9.6h

The earliest sunrise is at 4:14 AM on June 14, and the latest sunrise is 2 hours, 41 minutes later at 6:55 AM on January 7. The earliest sunset is at 4:18 PM on December 7, and the latest sunset is 2 hours, 48 minutes later at 7:05 PM on June 28.

Daylight saving time (DST) is not observed in Yamagata during 2024.

Sunrise & Sunset with Twilight in Yamagata

Sunrise & Sunset with Twilight in YamagataJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMJun 144:14 AMJun 144:14 AM7:05 PMJun 287:05 PMJun 28Dec 74:18 PMDec 74:18 PM6:55 AMJan 76:55 AMJan 7daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Yamagata

Solar Elevation and Azimuth in YamagataJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM0000101010102020202030303030404040505050606070000010101010202020203030304040505060702875NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Yamagata

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Yamagata experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.8 months, from June 24 to September 18, during which time the comfort level is muggy, oppressive, or miserable at least 20% of the time. The month with the most muggy days in Yamagata is August, with 22.0 days that are muggy or worse.

The least muggy day of the year is March 2, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Yamagata

Humidity Comfort Levels in YamagatamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 20%Mar 20%79%Aug 779%Aug 7Jun 2420%Jun 2420%Sep 1820%Sep 1820%NowNowoppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.1d3.4d17.6d22.0d7.7d0.3d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Yamagata experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.3 months, from November 19 to April 29, with average wind speeds of more than 7.2 miles per hour. The windiest month of the year in Yamagata is February, with an average hourly wind speed of 9.7 miles per hour.

The calmer time of year lasts for 6.7 months, from April 29 to November 19. The calmest month of the year in Yamagata is July, with an average hourly wind speed of 4.8 miles per hour.

Average Wind Speed in Yamagata

Average Wind Speed in YamagatawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphFeb 89.8 mphFeb 89.8 mphJul 284.6 mphJul 284.6 mphNov 197.2 mphNov 197.2 mphApr 297.2 mphApr 297.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 9.49.79.17.86.35.14.84.85.36.27.18.5

The predominant average hourly wind direction in Yamagata varies throughout the year.

The wind is most often from the east for 1.3 weeks, from August 20 to August 29, with a peak percentage of 33% on August 23. The wind is most often from the west for 12 months, from August 29 to August 20, with a peak percentage of 78% on January 1.

Wind Direction in Yamagata

Wind Direction in YamagataWWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastsouthnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Yamagata is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.7 months, from July 14 to October 3, with an average temperature above 70°F. The month of the year in Yamagata with the warmest water is August, with an average temperature of 76°F.

The time of year with cooler water lasts for 3.7 months, from January 8 to April 30, with an average temperature below 53°F. The month of the year in Yamagata with the coolest water is March, with an average temperature of 48°F.

Average Water Temperature in Yamagata

Average Water Temperature in YamagatawarmcoolJanFebMarAprMayJunJulAugSepOctNovDec40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 2076°FAug 2076°F47°FMar 947°FMar 9Jul 1470°FJul 1470°FOct 370°FOct 370°FJan 853°FJan 853°FApr 3053°FApr 3053°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 52°F49°F48°F51°F57°F65°F71°F76°F74°F68°F62°F57°F

To characterize how pleasant the weather is in Yamagata throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Yamagata for general outdoor tourist activities is from mid July to early September, with a peak score in the second week of August.

Tourism Score in Yamagata

Tourism Score in Yamagatabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.56.50.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Yamagata for hot-weather activities is from late July to mid August, with a peak score in the first week of August.

Beach/Pool Score in Yamagata

Beach/Pool Score in YamagataJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.94.90.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Yamagata typically lasts for 6.6 months (203 days), from around April 13 to around November 2, rarely starting before March 29 or after April 29, and rarely ending before October 18 or after November 18.

Time Spent in Various Temperature Bands and the Growing Season in Yamagata

Time Spent in Various Temperature Bands and the Growing Season in Yamagatagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1350%Apr 1350%Nov 250%Nov 290%Apr 2990%Apr 2990%Oct 1890%Oct 1810%Mar 2910%Mar 2910%Nov 1810%Nov 180%Feb 70%Feb 7Jul 22100%Jul 22100%freezingvery coldcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Yamagata should appear around May 2, only rarely appearing before April 25 or after May 10.

Growing Degree Days in Yamagata

Growing Degree Days in YamagataJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FMay 290°FMay 290°FJul 9900°FJul 9900°FAug 171,800°FAug 171,800°FDec 312,790°FDec 312,790°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.2 months, from April 15 to August 22, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest month of the year in Yamagata is June, with an average of 5.9 kWh.

The darker period of the year lasts for 3.1 months, from November 8 to February 11, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest month of the year in Yamagata is December, with an average of 1.8 kWh.

Average Daily Incident Shortwave Solar Energy in Yamagata

Average Daily Incident Shortwave Solar Energy in YamagatabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 16.1 kWhJun 16.1 kWhDec 241.7 kWhDec 241.7 kWhApr 155.2 kWhApr 155.2 kWhAug 225.2 kWhAug 225.2 kWhFeb 112.6 kWhFeb 112.6 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 1.92.74.05.25.95.95.75.44.33.42.31.8

For the purposes of this report, the geographical coordinates of Yamagata are 38.233 deg latitude, 140.367 deg longitude, and 1,053 ft elevation.

The topography within 2 miles of Yamagata contains very significant variations in elevation, with a maximum elevation change of 1,860 feet and an average elevation above sea level of 1,015 feet. Within 10 miles contains very significant variations in elevation (5,764 feet). Within 50 miles also contains extreme variations in elevation (7,031 feet).

The area within 2 miles of Yamagata is covered by trees (71%) and cropland (18%), within 10 miles by trees (65%) and cropland (28%), and within 50 miles by trees (65%) and cropland (18%).

This report illustrates the typical weather in Yamagata, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Yamagata.

For each station, the records are corrected for the elevation difference between that station and Yamagata according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Yamagata is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Yamagata and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Yamagata and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.