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Aizuwakamatsu Weather by Month
Average temperatures, rainfall and humidity for Aizuwakamatsu, Japan, month by month, built from OpenWeather's historical records. Use it to see what a typical Aizuwakamatsu month looks like before you travel — then check the live Aizuwakamatsu forecast for the days ahead.
Warmest month
August
30°C average high
Coolest month
January
-3°C average low
Wettest month
August
127 mm of rain
Driest month
January
15 mm of rain
Average temperature and rainfall in Aizuwakamatsu by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 6°C | -3°C | -16°C / 17°C | 15 mm | 75% | 12 km/h |
| February | 6°C | -3°C | -15°C / 18°C | 29 mm | 72% | 13 km/h |
| March | 11°C | 1°C | -9°C / 22°C | 66 mm | 72% | 13 km/h |
| April | 17°C | 6°C | -8°C / 29°C | 104 mm | 70% | 12 km/h |
| May | 22°C | 11°C | 0°C / 33°C | 95 mm | 72% | 11 km/h |
| June | 25°C | 16°C | 4°C / 39°C | 116 mm | 81% | 8 km/h |
| July | 29°C | 20°C | 13°C / 51°C | 126 mm | 85% | 8 km/h |
| August | 30°C | 21°C | 10°C / 50°C | 127 mm | 85% | 8 km/h |
| September | 25°C | 17°C | 5°C / 36°C | 111 mm | 84% | 8 km/h |
| October | 19°C | 10°C | -2°C / 30°C | 96 mm | 82% | 9 km/h |
| November | 14°C | 4°C | -10°C / 25°C | 47 mm | 79% | 10 km/h |
| December | 8°C | -1°C | -10°C / 19°C | 31 mm | 77% | 11 km/h |
Best time to visit Aizuwakamatsu
The most comfortable time to visit Aizuwakamatsu is generally May to June and September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around August, totalling about 963 mm a year.
Travellers who prefer heat should aim for August, when highs average 30°C. August is the month to avoid if rain would spoil your plans — it averages 127 mm, roughly 8× the rainfall of January.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Aizuwakamatsu forecast for what is happening now.