Climate Insights for Iwado

Kanra-gun, Gunma-ken, Japan

Hottest
August
26°C peak
Coldest
January
-4°C low
Wettest
July
303mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Iwado is temperate. The average annual temperature is 11°C and approximately 1953mm of precipitation falls per year. Iwado receives a notable amount of rainfall throughout the year, including during its driest month. Iwado 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. Snowfall occurs from January to December, with around 115cm accumulating over the season.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 3° Average: -1° Min: -4° Feb Max: 5° Average: 0° Min: -3° Mar Max: 9° Average: 4° Min: 0° Apr Max: 15° Average: 9° Min: 5° May Max: 19° Average: 14° Min: 10° Jun Max: 21° Average: 17° Min: 14° Jul Max: 25° Average: 22° Min: 19° Aug Max: 26° Average: 22° Min: 19° Sep Max: 22° Average: 18° Min: 16° Oct Max: 16° Average: 12° Min: 9° Nov Max: 12° Average: 7° Min: 3° Dec Max: 6° Average: 1° Min: -2°
Max
Average
Min

Temperatures in Iwado vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 26°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -4°C and the daily average is -1°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 56mm Snow: 30mm Feb Precipitation: 61mm Snow: 24mm Mar Precipitation: 120mm Snow: 38mm Apr Precipitation: 133mm Snow: 10mm May Precipitation: 164mm Snow: 0mm Jun Precipitation: 264mm Snow: 0mm Jul Precipitation: 303mm Snow: 0mm Aug Precipitation: 277mm Snow: 0mm Sep Precipitation: 241mm Snow: 0mm Oct Precipitation: 212mm Snow: 0mm Nov Precipitation: 79mm Snow: 4mm Dec Precipitation: 43mm Snow: 8mm
Precipitation
Snow

Iwado is a fairly wet location, receiving approximately 1953mm of precipitation annually, which averages out to around 163mm per month. The wettest month is July, averaging 303mm of rainfall. August and June also tend to see above-average precipitation. The driest month is December, with just 43mm. That's 260mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 115cm accumulating over the season. March typically sees the most snow at around 38cm.

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: 12km/h Apr Wind Speed: 11km/h May Wind Speed: 10km/h Jun Wind Speed: 9km/h Jul Wind Speed: 8km/h Aug Wind Speed: 8km/h Sep Wind Speed: 8km/h Oct Wind Speed: 9km/h Nov Wind Speed: 10km/h Dec Wind Speed: 13km/h
Wind Speed

Iwado is relatively calm, with an average annual wind speed of 10km/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 8km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/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, 11km/h in spring, 8km/h in summer, 9km/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 Iwado, which began on March 20, 2026. Iwado 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 26°C, while the coldest stretch bottoms out in January near -4°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 0 to 19°C. Rainfall is heavy, totalling around 417mm across the season with a monthly average of 139mm. Winds are generally light, averaging 11km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 14 to 26°C. Rainfall is heavy, totalling around 843mm across the season with a monthly average of 281mm. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 3 to 22°C. Rainfall is heavy, totalling around 532mm across the season with a monthly average of 177mm. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -4 to 6°C. Precipitation is moderate at around 160mm for the season, averaging 53mm per month. Expect around 63cm 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 Iwado 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
3 °C
14 km/h
56 mm
30 cm
Feb
-3 °C
5 °C
13 km/h
61 mm
24 cm
Mar Current
0 °C
9 °C
12 km/h
120 mm
38 cm
Apr
5 °C
15 °C
11 km/h
133 mm
10 cm
May
10 °C
19 °C
10 km/h
164 mm
0 cm
Jun
14 °C
21 °C
9 km/h
264 mm
0 cm
Jul
19 °C
25 °C
8 km/h
303 mm
0 cm
Aug
19 °C
26 °C
8 km/h
277 mm
0 cm
Sep
16 °C
22 °C
8 km/h
241 mm
0 cm
Oct
9 °C
16 °C
9 km/h
212 mm
0 cm
Nov
3 °C
12 °C
10 km/h
79 mm
4 cm
Dec
-2 °C
6 °C
13 km/h
43 mm
8 cm
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Metric (°C, km/h)