Climate Insights for Arai

Myoko-shi, Niigata-ken, Japan

Hottest
August
29°C peak
Coldest
January
-3°C low
Wettest
July
270mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Arai is temperate. The average annual temperature is 12°C and approximately 2323mm of precipitation falls per year. Arai receives a notable amount of rainfall throughout the year, including during its driest month. Arai 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 -3°C. Arai experiences heavy snowfall, typically from January through December.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 3° Average: 0° Min: -3° Feb Max: 4° Average: 1° Min: -2° Mar Max: 8° Average: 4° Min: 1° Apr Max: 15° Average: 10° Min: 6° May Max: 21° Average: 16° Min: 12° Jun Max: 23° Average: 20° Min: 16° Jul Max: 27° Average: 24° Min: 21° Aug Max: 29° Average: 25° Min: 22° Sep Max: 25° Average: 21° Min: 18° Oct Max: 18° Average: 14° Min: 11° Nov Max: 13° Average: 9° Min: 5° Dec Max: 6° Average: 2° Min: -1°
Max
Average
Min

Temperatures in Arai 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 29°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -3°C and the daily average is 0°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: 256mm Snow: 133mm Feb Precipitation: 173mm Snow: 81mm Mar Precipitation: 138mm Snow: 38mm Apr Precipitation: 139mm Snow: 4mm May Precipitation: 140mm Snow: 0mm Jun Precipitation: 173mm Snow: 0mm Jul Precipitation: 270mm Snow: 0mm Aug Precipitation: 215mm Snow: 0mm Sep Precipitation: 218mm Snow: 0mm Oct Precipitation: 183mm Snow: 0mm Nov Precipitation: 167mm Snow: 9mm Dec Precipitation: 251mm Snow: 92mm
Precipitation
Snow

Arai is a very wet location, receiving approximately 2323mm of precipitation annually, which averages out to around 194mm per month. The wettest month is July, averaging 270mm of rainfall. January and December also tend to see above-average precipitation. The driest month is March, with just 138mm. That's 131mm 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. Arai receives heavy snowfall, accumulating around 357cm annually from January through December. The snowiest month is January, with approximately 133cm. Winter travel should account for significant snow cover.

Wind

0km/h 5km/h 10km/h 15km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 14km/h Feb Wind Speed: 13km/h Mar Wind Speed: 13km/h Apr Wind Speed: 13km/h May Wind Speed: 12km/h Jun Wind Speed: 10km/h Jul Wind Speed: 9km/h Aug Wind Speed: 10km/h Sep Wind Speed: 10km/h Oct Wind Speed: 12km/h Nov Wind Speed: 12km/h Dec Wind Speed: 13km/h
Wind Speed

Arai is relatively calm, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/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 13km/h in winter, 13km/h in spring, 10km/h in summer, 12km/h in autumn.

Seasons

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

89 days until Summer

It is currently spring in Arai, which began on March 20, 2026. Arai 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 29°C, while the coldest stretch bottoms out in January near -3°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 1 to 21°C. Rainfall is heavy, totalling around 417mm across the season with a monthly average of 139mm. Winds are generally light, averaging 13km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 16 to 29°C. Rainfall is heavy, totalling around 658mm across the season with a monthly average of 219mm. Winds are generally light, averaging 10km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 5 to 25°C. Rainfall is heavy, totalling around 568mm across the season with a monthly average of 189mm. Expect around 9cm of snow accumulation during this period. Winds are generally light, averaging 12km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -3 to 6°C. Rainfall is heavy, totalling around 680mm across the season with a monthly average of 227mm. Expect around 306cm of snow accumulation during this period. Winds are generally light, averaging 13km/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 Arai 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
-3 °C
3 °C
14 km/h
256 mm
133 cm
Feb
-2 °C
4 °C
13 km/h
173 mm
81 cm
Mar Current
1 °C
8 °C
13 km/h
138 mm
38 cm
Apr
6 °C
15 °C
13 km/h
139 mm
4 cm
May
12 °C
21 °C
12 km/h
140 mm
0 cm
Jun
16 °C
23 °C
10 km/h
173 mm
0 cm
Jul
21 °C
27 °C
9 km/h
270 mm
0 cm
Aug
22 °C
29 °C
10 km/h
215 mm
0 cm
Sep
18 °C
25 °C
10 km/h
218 mm
0 cm
Oct
11 °C
18 °C
12 km/h
183 mm
0 cm
Nov
5 °C
13 °C
12 km/h
167 mm
9 cm
Dec
-1 °C
6 °C
13 km/h
251 mm
92 cm
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Metric (°C, km/h)