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Average Weather in Amagi Japan

In Amagi, the summers are hot, oppressive, and mostly cloudy; the winters are very cold and partly cloudy; and it is wet year round. Over the course of the year, the temperature typically varies from 33°F to 89°F and is rarely below 27°F or above 94°F.

Based on the tourism score, the best time of year to visit Amagi for warm-weather activities is from late August to mid October.

Climate Summary

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow69%69%27%27%overcastclearprecipitation: 14.4 inprecipitation: 14.4 in1.8 in1.8 inmuggy: 99%muggy: 99%0%0%drydrytourism score: 6.6tourism score: 6.60.10.1
Click on each chart for more information.

Temperature

The hot season lasts for 3.0 months, from June 21 to September 20, with an average daily high temperature above 81°F. The hottest day of the year is August 5, with an average high of 89°F and low of 76°F.

The cool season lasts for 3.3 months, from December 4 to March 13, with an average daily high temperature below 56°F. The coldest day of the year is January 25, with an average low of 33°F and high of 47°F.

Average High and Low Temperature

Average High and Low Temperature in AmagihotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2547°FJan 2547°FAug 589°FAug 589°F33°F33°F76°F76°FJun 2181°FJun 2181°FSep 2081°FSep 2081°FDec 456°FDec 456°FMar 1356°FMar 1356°F69°F69°F66°F66°F40°F40°F40°F40°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.

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

Average Hourly Temperature in AmagiJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldvery coldcoldcoldcoolcoolwarmhotvery coldcomfortablevery coldcomfortable
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.

East Hampton, Virginia, United States (7,276 miles away) is the far-away foreign place with temperatures most similar to Amagi (view comparison).

Clouds

In Amagi, 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 Amagi begins around September 5 and lasts for 6.6 months, ending around March 25. On October 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.

The cloudier part of the year begins around March 25 and lasts for 5.3 months, ending around September 5. On July 2, the cloudiest day of the year, the sky is overcast or mostly cloudy 73% of the time, and clear, mostly clear, or partly cloudy 27% of the time.

Cloud Cover Categories

Cloud Cover Categories in AmagiclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 2669%Oct 2669%Jul 227%Jul 227%Sep 548%Sep 548%Mar 2548%Mar 2548%NowNowclearmostly clearpartly 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.

Precipitation

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

The wetter season lasts 3.1 months, from June 8 to September 10, with a greater than 38% chance of a given day being a wet day. The chance of a wet day peaks at 58% on July 2.

The drier season lasts 8.9 months, from September 10 to June 8. The smallest chance of a wet day is 18% on December 29.

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 throughout the year is rain alone, with a peak probability of 58% on July 2.

Daily Chance of Precipitation

Daily Chance of Precipitation in AmagiwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 258%Jul 258%Dec 2918%Dec 2918%Jun 838%Jun 838%Sep 1038%Sep 1038%NowNowrain
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).

Rainfall

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. Amagi experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Amagi. The most rain falls during the 31 days centered around June 30, with an average total accumulation of 14.4 inches.

The least rain falls around December 31, with an average total accumulation of 1.7 inches.

Average Monthly Rainfall

Average Monthly Rainfall in AmagiJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 inJun 3014.4 inJun 3014.4 inDec 311.7 inDec 311.7 inAug 307.3 inAug 307.3 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 liquid-equivalent snowfall.

Sun

The length of the day in Amagi varies significantly over the course of the year. In 2021, the shortest day is December 22, with 9 hours, 56 minutes of daylight; the longest day is June 21, with 14 hours, 22 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in AmagiJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2014 hr, 22 minJun 2114 hr, 22 minJun 2112 hr, 9 minSep 2312 hr, 9 minSep 239 hr, 56 minDec 229 hr, 56 minDec 22nightnightdayNowNow
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.

The earliest sunrise is at 5:07 AM on June 12, and the latest sunrise is 2 hours, 15 minutes later at 7:22 AM on January 8. The earliest sunset is at 5:09 PM on December 4, and the latest sunset is 2 hours, 22 minutes later at 7:31 PM on June 29.

Daylight saving time (DST) is not observed in Amagi during 2021.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in AmagiJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:07 AMJun 125:07 AM7:31 PMJun 297:31 PMJun 29Dec 45:09 PMDec 45:09 PM7:22 AMJan 87:22 AMJan 8daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. 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.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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

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.

Humidity

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.

Amagi experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.9 months, from June 5 to October 2, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The muggiest day of the year is August 4, with muggy conditions 99% of the time.

The least muggy day of the year is January 31, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in AmagimuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 310%Jan 310%99%Aug 499%Aug 4Jun 525%Jun 525%Oct 225%Oct 225%NowNowoppressiveoppressivedrydrymiserablemiserablehumidhumid
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.

Wind

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 Amagi experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.2 months, from November 19 to April 27, with average wind speeds of more than 6.4 miles per hour. The windiest day of the year is February 6, with an average hourly wind speed of 7.6 miles per hour.

The calmer time of year lasts for 6.8 months, from April 27 to November 19. The calmest day of the year is August 4, with an average hourly wind speed of 5.3 miles per hour.

Average Wind Speed

Average Wind Speed in AmagiwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphFeb 67.6 mphFeb 67.6 mphAug 45.3 mphAug 45.3 mphNov 196.4 mphNov 196.4 mphApr 276.4 mphApr 276.4 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the north for 2.2 months, from January 31 to April 7; for 1.0 weeks, from May 24 to May 31; and for 3.4 months, from August 23 to December 5, with a peak percentage of 46% on October 7. The wind is most often from the west for 3.1 weeks, from April 7 to April 29 and for 1.8 months, from December 5 to January 31, with a peak percentage of 31% on April 17. The wind is most often from the south for 3.6 weeks, from April 29 to May 24 and for 2.4 months, from June 10 to August 23, with a peak percentage of 41% on July 9.

Wind Direction

Wind Direction in AmagiWNWSESNWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestnorthsoutheast
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).

Water Temperature

Amagi 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 2.6 months, from July 11 to September 29, with an average temperature above 76°F. The day of the year with the warmest water is August 16, with an average temperature of 81°F.

The time of year with cooler water lasts for 4.0 months, from December 23 to April 25, with an average temperature below 62°F. The day of the year with the coolest water is February 20, with an average temperature of 57°F.

Average Water Temperature

Average Water Temperature in AmagiwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 1681°FAug 1681°F57°FFeb 2057°FFeb 20Jul 1176°FJul 1176°FSep 2976°FSep 2976°FDec 2362°FDec 2362°FApr 2562°FApr 2562°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Amagi 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 Amagi for general outdoor tourist activities is from late August to mid October, with a peak score in the third week of September.

Tourism Score

Tourism Score in Amagibest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.60.10.15.95.94.54.5NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Amagi for hot-weather activities is from mid July to early September, with a peak score in the second week of August.

Beach/Pool Score

Beach/Pool Score in Amagibest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.26.20.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/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.

Growing Season

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 Amagi typically lasts for 8.5 months (260 days), from around March 19 to around December 4, rarely starting before March 2 or after April 7, and rarely ending before November 18 or after December 20.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Amagigrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1950%Mar 1950%Dec 450%Dec 490%Apr 790%Apr 790%Nov 1890%Nov 1810%Mar 210%Mar 210%Dec 2010%Dec 200%Jan 290%Jan 29Aug 1100%Aug 1100%NowNowvery coldcoldwarmhotcoolcomfortable
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 Amagi should appear around March 22, only rarely appearing before March 9 or after April 4.

Growing Degree Days

Growing Degree Days in AmagiJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FMar 2280°FMar 2280°FJun 2900°FJun 2900°FJul 91,800°FJul 91,800°FDec 314,766°FDec 314,766°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 4.4 months, from April 14 to August 26, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest day of the year is May 23, with an average of 6.2 kWh.

The darker period of the year lasts for 2.9 months, from November 11 to February 7, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest day of the year is December 24, with an average of 2.6 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in AmagibrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhMay 236.2 kWhMay 236.2 kWhDec 242.6 kWhDec 242.6 kWhApr 145.4 kWhApr 145.4 kWhAug 265.4 kWhAug 265.4 kWhFeb 73.3 kWhFeb 73.3 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.

Topography

For the purposes of this report, the geographical coordinates of Amagi are 33.418 deg latitude, 130.654 deg longitude, and 125 ft elevation.

The topography within 2 miles of Amagi contains very significant variations in elevation, with a maximum elevation change of 942 feet and an average elevation above sea level of 146 feet. Within 10 miles contains very significant variations in elevation (3,199 feet). Within 50 miles contains large variations in elevation (5,899 feet).

The area within 2 miles of Amagi is covered by cropland (68%) and trees (22%), within 10 miles by trees (55%) and cropland (38%), and within 50 miles by water (40%) and trees (38%).

Data Sources

This report illustrates the typical weather in Amagi, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Amagi.

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

The stations contributing to this reconstruction are: Fukuoka Airport (47%, 27 kilometers, northwest); Saga Airport (22%, 44 kilometers, southwest); Tsuiki Ab (20%, 47 kilometers, northeast); and Kumamoto Airport (11%, 67 kilometers, south).

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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.