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Kumagaya Weather by Month
Average temperatures, rainfall and humidity for Kumagaya, Japan, month by month, built from OpenWeather's historical records. Use it to see what a typical Kumagaya month looks like before you travel — then check the live Kumagaya forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
0°C average low
Wettest month
June
154 mm of rain
Driest month
January
17 mm of rain
Average temperature and rainfall in Kumagaya 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 | 10°C | 0°C | -13°C / 18°C | 17 mm | 53% | 10 km/h |
| February | 11°C | 1°C | -11°C / 23°C | 24 mm | 52% | 11 km/h |
| March | 15°C | 5°C | -6°C / 29°C | 64 mm | 58% | 10 km/h |
| April | 20°C | 10°C | -3°C / 30°C | 89 mm | 60% | 10 km/h |
| May | 24°C | 15°C | 2°C / 34°C | 85 mm | 63% | 9 km/h |
| June | 27°C | 19°C | 10°C / 39°C | 154 mm | 73% | 8 km/h |
| July | 31°C | 23°C | 14°C / 40°C | 138 mm | 73% | 8 km/h |
| August | 32°C | 24°C | 16°C / 41°C | 115 mm | 73% | 8 km/h |
| September | 28°C | 20°C | 11°C / 39°C | 126 mm | 75% | 8 km/h |
| October | 22°C | 14°C | 0°C / 36°C | 109 mm | 70% | 8 km/h |
| November | 17°C | 8°C | -5°C / 26°C | 37 mm | 64% | 8 km/h |
| December | 12°C | 3°C | -10°C / 23°C | 20 mm | 57% | 9 km/h |
Best time to visit Kumagaya
The most comfortable time to visit Kumagaya is generally April to May and October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 977 mm a year.
Travellers who prefer heat should aim for August, when highs average 32°C. June is the month to avoid if rain would spoil your plans — it averages 154 mm, roughly 9× the rainfall of January.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Kumagaya forecast for what is happening now.