Climate Insights for Aratokō

Nishiokitama-gun, Yamagata-ken, Japan

Hottest
August
28°C peak
Coldest
January
-4°C low
Wettest
July
258mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Aratokō is temperate. The average annual temperature is 11°C and approximately 2282mm of precipitation falls per year. Aratokō receives a notable amount of rainfall throughout the year, including during its driest month. Aratokō is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to -4°C. Aratokō experiences heavy snowfall, typically from January through December.

Temperature

-10° 0° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 1° Average: -2° Min: -4° Feb Max: 1° Average: -1° Min: -4° Mar Max: 6° Average: 2° Min: -1° Apr Max: 13° Average: 8° Min: 4° May Max: 19° Average: 15° Min: 10° Jun Max: 23° Average: 19° Min: 15° Jul Max: 27° Average: 23° Min: 20° Aug Max: 28° Average: 24° Min: 21° Sep Max: 24° Average: 20° Min: 17° Oct Max: 17° Average: 13° Min: 9° Nov Max: 10° Average: 6° Min: 3° Dec Max: 3° Average: 0° Min: -2°
Max
Average
Min

Temperatures in Aratokō vary considerably across the year, with a 32°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 28°C and the mean temperature sits around 24°C. The coldest month is January, when overnight lows fall to -4°C and the daily average is -2°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 241mm Snow: 212mm Feb Precipitation: 181mm Snow: 146mm Mar Precipitation: 149mm Snow: 81mm Apr Precipitation: 142mm Snow: 19mm May Precipitation: 132mm Snow: 0mm Jun Precipitation: 170mm Snow: 0mm Jul Precipitation: 258mm Snow: 0mm Aug Precipitation: 248mm Snow: 0mm Sep Precipitation: 186mm Snow: 0mm Oct Precipitation: 162mm Snow: 0mm Nov Precipitation: 159mm Snow: 36mm Dec Precipitation: 255mm Snow: 185mm
Precipitation
Snow

Aratokō is a very wet location, receiving approximately 2282mm of precipitation annually, which averages out to around 190mm per month. The wettest month is July, averaging 258mm of rainfall. December and August also tend to see above-average precipitation. The driest month is May, with just 132mm. That's 126mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Aratokō receives heavy snowfall, accumulating around 679cm annually from January through December. The snowiest month is January, with approximately 212cm. Winter travel should account for significant snow cover.

Wind

0km/h 5km/h 10km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 10km/h Feb Wind Speed: 10km/h Mar Wind Speed: 9km/h Apr Wind Speed: 9km/h May Wind Speed: 8km/h Jun Wind Speed: 7km/h Jul Wind Speed: 6km/h Aug Wind Speed: 6km/h Sep Wind Speed: 6km/h Oct Wind Speed: 7km/h Nov Wind Speed: 8km/h Dec Wind Speed: 9km/h
Wind Speed

Aratokō is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 10km/h in winter, 9km/h in spring, 6km/h in summer, 7km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

87 days until Winter

It is currently autumn in Aratokō, which began on September 23, 2026. Aratokō is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 28°C, while the coldest stretch bottoms out in January near -4°C. Winter is next, beginning on December 21, 2026 (87 days from now).

Spring

Temperatures range from -1 to 19°C. Rainfall is heavy, totalling around 422mm across the season with a monthly average of 141mm. Winds are generally light, averaging 9km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 15 to 28°C. Rainfall is heavy, totalling around 676mm across the season with a monthly average of 225mm. Winds are generally light, averaging 6km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.

Autumn

Temperatures range from 3 to 24°C. Rainfall is heavy, totalling around 507mm across the season with a monthly average of 169mm. Expect around 36cm of snow accumulation during this period. Winds are generally light, averaging 7km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -4 to 3°C. Rainfall is heavy, totalling around 677mm across the season with a monthly average of 226mm. Expect around 543cm of snow accumulation during this period. Winds are generally light, averaging 10km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Monthly Climate Data

The table below shows monthly climate averages for Aratokō based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
-4 °C
1 °C
10 km/h
241 mm
212 cm
Feb
-4 °C
1 °C
10 km/h
181 mm
146 cm
Mar
-1 °C
6 °C
9 km/h
149 mm
81 cm
Apr
4 °C
13 °C
9 km/h
142 mm
19 cm
May
10 °C
19 °C
8 km/h
132 mm
0 cm
Jun
15 °C
23 °C
7 km/h
170 mm
0 cm
Jul
20 °C
27 °C
6 km/h
258 mm
0 cm
Aug
21 °C
28 °C
6 km/h
248 mm
0 cm
Sep Current
17 °C
24 °C
6 km/h
186 mm
0 cm
Oct
9 °C
17 °C
7 km/h
162 mm
0 cm
Nov
3 °C
10 °C
8 km/h
159 mm
36 cm
Dec
-2 °C
3 °C
9 km/h
255 mm
185 cm
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Metric (°C, km/h)