Climate Overview
The climate in Aizu-Wakamatsu is temperate. The average annual temperature is 11°C and approximately 1486mm of precipitation falls per year. Aizu-Wakamatsu receives a notable amount of rainfall throughout the year, including during its driest month. Aizu-Wakamatsu 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. Aizu-Wakamatsu experiences heavy snowfall, typically from January through December.
Temperature
Temperatures in Aizu-Wakamatsu 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 -1°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
Aizu-Wakamatsu is a fairly wet location, receiving approximately 1486mm of precipitation annually, which averages out to around 124mm per month. The wettest month is July, averaging 212mm of rainfall. August and September also tend to see above-average precipitation. The driest month is November, with just 63mm. That's 149mm 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. Aizu-Wakamatsu receives heavy snowfall, accumulating around 291cm annually from January through December. The snowiest month is January, with approximately 102cm. Winter travel should account for significant snow cover.
Wind
Aizu-Wakamatsu is relatively calm, with an average annual wind speed of 2km/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
93 days until Autumn
It is currently summer in Aizu-Wakamatsu, which began on June 21, 2026. Aizu-Wakamatsu 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. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 0 to 20°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 15 to 28°C. Rainfall is heavy, totalling around 505mm across the season with a monthly average of 168mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 3 to 23°C. Rainfall is heavy, totalling around 358mm across the season with a monthly average of 119mm. Expect around 9cm of snow accumulation during this period. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -4 to 5°C. Rainfall is heavy, totalling around 314mm across the season with a monthly average of 105mm. Expect around 225cm 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.
Best Time to Visit
The best time to visit Aizu-Wakamatsu is during May, when the weather is most comfortable for travellers. During these months, average temperatures hover around 15°C with modest rainfall averaging 90mm per month. By contrast, August can be uncomfortably hot with highs reaching 28°C, while January is the coldest period with lows dropping to -4°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.
Monthly Climate Data
The table below shows monthly climate averages for Aizu-Wakamatsu 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.
