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Adachi Weather by Month
Average temperatures, rainfall and humidity for Adachi, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Adachi month looks like before you travel — then check the live Adachi forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
2°C average low
Wettest month
September
159 mm of rain
Driest month
January
28 mm of rain
Average temperature and rainfall in Adachi 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 | 2°C | -7°C / 18°C | 28 mm | 56% | 12 km/h |
| February | 11°C | 3°C | -5°C / 23°C | 44 mm | 58% | 13 km/h |
| March | 15°C | 7°C | -3°C / 28°C | 81 mm | 63% | 13 km/h |
| April | 19°C | 12°C | 1°C / 29°C | 106 mm | 66% | 13 km/h |
| May | 24°C | 17°C | 7°C / 34°C | 106 mm | 70% | 13 km/h |
| June | 27°C | 20°C | 13°C / 38°C | 152 mm | 74% | 11 km/h |
| July | 31°C | 24°C | 18°C / 39°C | 113 mm | 76% | 11 km/h |
| August | 32°C | 26°C | 17°C / 40°C | 126 mm | 72% | 12 km/h |
| September | 28°C | 22°C | 12°C / 37°C | 159 mm | 76% | 11 km/h |
| October | 22°C | 16°C | 5°C / 33°C | 117 mm | 71% | 12 km/h |
| November | 17°C | 10°C | -1°C / 27°C | 62 mm | 64% | 11 km/h |
| December | 12°C | 4°C | -6°C / 23°C | 36 mm | 57% | 12 km/h |
Best time to visit Adachi
The most comfortable time to visit Adachi 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 September, totalling about 1,128 mm a year.
Travellers who prefer heat should aim for August, when highs average 32°C. September is the month to avoid if rain would spoil your plans — it averages 159 mm, roughly 6× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Adachi forecast for what is happening now.
Weather across Japan right now
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