Climate Insights for Kasaishi

Iwase-gun, Fukushima-ken, Japan

Hottest
August
28°C peak
Coldest
January
-3°C low
Wettest
July
224mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Kasaishi is temperate. The average annual temperature is 12°C and approximately 1408mm of precipitation falls per year. Kasaishi receives a notable amount of rainfall throughout the year, including during its driest month. Kasaishi 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. Snowfall occurs from January to December, with around 134cm accumulating over the season.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 4° Average: 0° Min: -3° Feb Max: 5° Average: 1° Min: -2° Mar Max: 9° Average: 5° Min: 1° Apr Max: 15° Average: 10° Min: 6° May Max: 21° Average: 16° Min: 11° Jun Max: 23° Average: 19° Min: 16° Jul Max: 27° Average: 23° Min: 20° Aug Max: 28° Average: 24° Min: 21° Sep Max: 24° Average: 20° Min: 17° Oct Max: 18° Average: 14° Min: 11° Nov Max: 12° Average: 8° Min: 4° Dec Max: 6° Average: 2° Min: 0°
Max
Average
Min

Temperatures in Kasaishi vary considerably across the year, with a 31°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 -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 6°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 72mm Snow: 50mm Feb Precipitation: 49mm Snow: 21mm Mar Precipitation: 91mm Snow: 29mm Apr Precipitation: 112mm Snow: 9mm May Precipitation: 106mm Snow: 0mm Jun Precipitation: 145mm Snow: 0mm Jul Precipitation: 224mm Snow: 0mm Aug Precipitation: 145mm Snow: 0mm Sep Precipitation: 183mm Snow: 0mm Oct Precipitation: 178mm Snow: 0mm Nov Precipitation: 50mm Snow: 2mm Dec Precipitation: 53mm Snow: 23mm
Precipitation
Snow

Kasaishi is a fairly wet location, receiving approximately 1408mm of precipitation annually, which averages out to around 117mm per month. The wettest month is July, averaging 224mm of rainfall. September and October also tend to see above-average precipitation. The driest month is February, with just 49mm. That's 175mm less than July, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 134cm accumulating over the season. January typically sees the most snow at around 50cm.

Wind

0km/h 5km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 3km/h Feb Wind Speed: 3km/h Mar Wind Speed: 3km/h Apr Wind Speed: 3km/h May Wind Speed: 3km/h Jun Wind Speed: 2km/h Jul Wind Speed: 2km/h Aug Wind Speed: 2km/h Sep Wind Speed: 2km/h Oct Wind Speed: 2km/h Nov Wind Speed: 3km/h Dec Wind Speed: 3km/h
Wind Speed

Kasaishi is relatively calm, with an average annual wind speed of 3km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

Seasons

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

93 days until Autumn

It is currently summer in Kasaishi, which began on June 21, 2026. Kasaishi 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 -3°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

Spring

Temperatures range from 1 to 21°C. Rainfall is heavy, totalling around 309mm across the season with a monthly average of 103mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 16 to 28°C. Rainfall is heavy, totalling around 514mm across the season with a monthly average of 171mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 4 to 24°C. Rainfall is heavy, totalling around 412mm across the season with a monthly average of 137mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -3 to 6°C. Precipitation is moderate at around 174mm for the season, averaging 58mm per month. Expect around 94cm of snow accumulation during this period. Winds are generally light, averaging 3km/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 Kasaishi 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
4 °C
3 km/h
72 mm
50 cm
Feb
-2 °C
5 °C
3 km/h
49 mm
21 cm
Mar
1 °C
9 °C
3 km/h
91 mm
29 cm
Apr
6 °C
15 °C
3 km/h
112 mm
9 cm
May
11 °C
21 °C
3 km/h
106 mm
0 cm
Jun Current
16 °C
23 °C
2 km/h
145 mm
0 cm
Jul
20 °C
27 °C
2 km/h
224 mm
0 cm
Aug
21 °C
28 °C
2 km/h
145 mm
0 cm
Sep
17 °C
24 °C
2 km/h
183 mm
0 cm
Oct
11 °C
18 °C
2 km/h
178 mm
0 cm
Nov
4 °C
12 °C
3 km/h
50 mm
2 cm
Dec
0 °C
6 °C
3 km/h
53 mm
23 cm
Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

gb English
Metric (°C, km/h)

Confirm