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Climate and Average Weather Year Round in Akita Japan

In Akita, the summers are warm, muggy, and wet; the winters are very cold, snowy, and windy; and it is mostly cloudy year round. Over the course of the year, the temperature typically varies from 28°F to 83°F and is rarely below 22°F or above 90°F.

Based on the tourism score, the best time of year to visit Akita for warm-weather activities is from early June to late September.

Climate in Akita

very coldcoldcoolcomfortablewarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow61%61%20%20%overcastclearprecipitation: 6.0 inprecipitation: 6.0 in2.0 in2.0 inmuggy: 83%muggy: 83%0%0%drydrytourism score: 6.3tourism score: 6.30.00.0
Akita weather by month. Click on each chart for more information.

The warm season lasts for 3.1 months, from June 17 to September 20, with an average daily high temperature above 73°F. The hottest month of the year in Akita is August, with an average high of 82°F and low of 70°F.

The cold season lasts for 3.5 months, from December 2 to March 19, with an average daily high temperature below 45°F. The coldest month of the year in Akita is January, with an average low of 28°F and high of 36°F.

Average High and Low Temperature in Akita

Average High and Low Temperature in AkitawarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2835°FJan 2835°FAug 783°FAug 783°F28°F28°F71°F71°FJun 1773°FJun 1773°FSep 2073°FSep 2073°FDec 245°FDec 245°FMar 1945°FMar 1945°F62°F62°F61°F61°F35°F35°F34°F34°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 36°F37°F44°F56°F66°F73°F79°F82°F75°F64°F51°F41°F
Temp. 32°F33°F38°F49°F59°F67°F73°F76°F68°F57°F46°F36°F
Low 28°F29°F34°F43°F53°F61°F68°F70°F62°F50°F40°F32°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 Akita

Average Hourly Temperature in AkitaJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcoolcomfortablewarm
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.

Stony Brook, New York, United States (6,493 miles away) is the far-away foreign place with temperatures most similar to Akita (view comparison).

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Compare Akita to another city:

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In Akita, 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 Akita begins around March 6 and lasts for 8.8 months, ending around December 1.

The clearest month of the year in Akita is October, 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 December 1 and lasts for 3.2 months, ending around March 6.

The cloudiest month of the year in Akita is January, during which on average the sky is overcast or mostly cloudy 78% of the time.

Cloud Cover Categories in Akita

Cloud Cover Categories in AkitaclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 2261%Oct 2261%Jan 1920%Jan 1920%Mar 640%Mar 640%Dec 141%Dec 141%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 78%72%55%51%54%53%57%53%51%41%49%67%
Clearer 22%28%45%49%46%47%43%47%49%59%51%33%

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

The wetter season lasts 6.4 months, from June 23 to January 4, with a greater than 40% chance of a given day being a wet day. The month with the most wet days in Akita is November, with an average of 14.8 days with at least 0.04 inches of precipitation.

The drier season lasts 5.6 months, from January 4 to June 23. The month with the fewest wet days in Akita is February, with an average of 8.9 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. The month with the most days of rain alone in Akita is November, with an average of 14.4 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 49% on November 20.

Daily Chance of Precipitation in Akita

Daily Chance of Precipitation in AkitawetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 2551%Nov 2551%Jun 129%Jun 129%Jan 440%Jan 440%NowNowrainmixedsnow
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 6.3d5.6d8.8d10.0d9.8d10.5d12.9d12.1d13.1d13.4d14.4d11.6d
Mixed 2.4d1.9d0.7d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.3d1.6d
Snow 1.9d1.4d0.5d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d1.1d
Any 10.6d8.9d10.0d10.0d9.8d10.5d12.9d12.1d13.1d13.4d14.8d14.3d

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. Akita experiences extreme seasonal variation in monthly rainfall.

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

The month with the least rain in Akita is February, with an average rainfall of 1.8 inches.

Average Monthly Rainfall in Akita

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 1.9″1.8″2.4″3.4″3.4″4.3″5.8″5.7″5.7″4.7″4.6″3.3″

Snowfall

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

The snowy period of the year lasts for 3.6 months, from November 28 to March 16, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Akita is January, with an average snowfall of 3.8 inches.

The snowless period of the year lasts for 8.4 months, from March 16 to November 28. The least snow falls around July 23, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Akita

Average Monthly Snowfall in AkitasnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inJan 133.9 inJan 133.9 inJul 230.0 inJul 230.0 inNov 281.0 inNov 281.0 inMar 161.0 inMar 161.0 inNowNow
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 3.8″3.1″1.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.3″2.6″

The length of the day in Akita varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 21 minutes of daylight; the longest day is June 21, with 14 hours, 59 minutes of daylight.

Hours of Daylight and Twilight in Akita

Hours of Daylight and Twilight in AkitaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2014 hr, 59 minJun 2114 hr, 59 minJun 2112 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 21 minDec 219 hr, 21 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 9.7h10.7h12.0h13.3h14.4h14.9h14.7h13.7h12.4h11.1h10.0h9.4h

The earliest sunrise is at 4:11 AM on June 14, and the latest sunrise is 2 hours, 50 minutes later at 7:00 AM on January 6. The earliest sunset is at 4:14 PM on December 7, and the latest sunset is 2 hours, 57 minutes later at 7:11 PM on June 27.

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

Sunrise & Sunset with Twilight in Akita

Sunrise & Sunset with Twilight in AkitaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMJun 144:11 AMJun 144:11 AM7:11 PMJun 277:11 PMJun 27Dec 74:14 PMDec 74:14 PM7:00 AMJan 67:00 AMJan 6daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Akita

Solar Elevation and Azimuth in AkitaJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000010101010202020203030303040404050506060700000101010102020202030303040405050602774NowNow
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 Akita

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.

Akita experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.8 months, from June 23 to September 18, during which time the comfort level is muggy, oppressive, or miserable at least 21% of the time. The month with the most muggy days in Akita is August, with 23.4 days that are muggy or worse.

The least muggy day of the year is March 4, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Akita

Humidity Comfort Levels in AkitamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 40%Mar 40%83%Aug 783%Aug 7Jun 2321%Jun 2321%Sep 1821%Sep 1821%NowNowoppressiveoppressivemuggymuggyhumidhumiddrydrymiserablemiserablecomfortablecomfortable
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 0.0d0.0d0.0d0.0d0.1d3.9d19.0d23.4d8.4d0.4d0.0d0.0d

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 Akita experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.2 months, from November 2 to April 8, with average wind speeds of more than 10.0 miles per hour. The windiest month of the year in Akita is January, with an average hourly wind speed of 13.7 miles per hour.

The calmer time of year lasts for 6.8 months, from April 8 to November 2. The calmest month of the year in Akita is July, with an average hourly wind speed of 6.3 miles per hour.

Average Wind Speed in Akita

Average Wind Speed in AkitawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mphJan 1913.9 mphJan 1913.9 mphJul 296.2 mphJul 296.2 mphNov 210.0 mphNov 210.0 mphApr 810.0 mphApr 810.0 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) 13.713.411.89.67.86.56.36.57.49.110.812.6

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

The wind is most often from the south for 1.1 months, from May 5 to June 8 and for 1.3 months, from July 5 to August 14, with a peak percentage of 37% on May 13. The wind is most often from the west for 3.9 weeks, from June 8 to July 5; for 1.1 weeks, from August 14 to August 22; and for 7.9 months, from September 7 to May 5, with a peak percentage of 33% on June 26. The wind is most often from the east for 2.3 weeks, from August 22 to September 7, with a peak percentage of 29% on August 29.

Wind Direction in Akita

Wind Direction in AkitaWSWSEWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
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).

Akita 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 15 to October 5, with an average temperature above 71°F. The month of the year in Akita with the warmest water is August, with an average temperature of 77°F.

The time of year with cooler water lasts for 4.0 months, from January 4 to May 5, with an average temperature below 53°F. The month of the year in Akita with the coolest water is March, with an average temperature of 47°F.

Average Water Temperature in Akita

Average Water Temperature in AkitawarmcoolJanFebMarAprMayJunJulAugSepOctNovDec40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 2177°FAug 2177°F47°FMar 847°FMar 8Jul 1571°FJul 1571°FOct 571°FOct 571°FJan 453°FJan 453°FMay 553°FMay 553°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 51°F48°F47°F50°F56°F65°F72°F77°F75°F69°F63°F56°F

To characterize how pleasant the weather is in Akita 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 Akita for general outdoor tourist activities is from early June to late September, with a peak score in the first week of August.

Tourism Score in Akita

Tourism Score in Akitabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.36.30.00.0NowNowtemperaturetemperature 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 Akita for hot-weather activities is from late July to late August, with a peak score in the first week of August.

Beach/Pool Score in Akita

Beach/Pool Score in AkitaJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.95.90.00.0NowNowtemperaturetemperature 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 Akita typically lasts for 8.0 months (244 days), from around March 28 to around November 27, rarely starting before March 12 or after April 13, and rarely ending before November 9 or after December 15.

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

Time Spent in Various Temperature Bands and the Growing Season in Akitagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 2850%Mar 2850%Nov 2750%Nov 2790%Apr 1390%Apr 1390%Nov 990%Nov 910%Mar 1210%Mar 1210%Dec 1510%Dec 150%Jan 300%Jan 30Jul 26100%Jul 26100%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 Akita should appear around April 29, only rarely appearing before April 21 or after May 9.

Growing Degree Days in Akita

Growing Degree Days in AkitaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FApr 2989°FApr 2989°FJul 2900°FJul 2900°FAug 91,800°FAug 91,800°FDec 313,197°FDec 313,197°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 4.1 months, from April 19 to August 21, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest month of the year in Akita is June, with an average of 6.1 kWh.

The darker period of the year lasts for 3.2 months, from November 8 to February 15, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest month of the year in Akita is December, with an average of 1.4 kWh.

Average Daily Incident Shortwave Solar Energy in Akita

Average Daily Incident Shortwave Solar Energy in AkitabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 96.3 kWhJun 96.3 kWhDec 251.3 kWhDec 251.3 kWhApr 195.3 kWhApr 195.3 kWhAug 215.3 kWhAug 215.3 kWhFeb 152.3 kWhFeb 152.3 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) 1.52.33.75.15.86.15.95.44.33.32.11.4

For the purposes of this report, the geographical coordinates of Akita are 39.717 deg latitude, 140.100 deg longitude, and 33 ft elevation.

The topography within 2 miles of Akita contains only modest variations in elevation, with a maximum elevation change of 174 feet and an average elevation above sea level of 37 feet. Within 10 miles contains only modest variations in elevation (2,900 feet). Within 50 miles contains large variations in elevation (7,320 feet).

The area within 2 miles of Akita is covered by trees (28%), cropland (28%), grassland (26%), and shrubs (11%), within 10 miles by water (45%) and trees (40%), and within 50 miles by water (50%) and trees (39%).

This report illustrates the typical weather in Akita, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Akita.

For each station, the records are corrected for the elevation difference between that station and Akita 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 Akita is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Akita and a given station.

The stations contributing to this reconstruction are:

  • Akita Airport (RJSK, 95%, 9 mi, southeast, 279 ft elevation change)
  • Aomori Airport (RJSA, 4.9%, 77 mi, northeast, 630 ft elevation change)

To get a sense of how much these sources agree with each other, you can view a comparison of Akita 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.