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Tachikawa Weather by Month
Average temperatures, rainfall and humidity for Tachikawa, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Tachikawa month looks like before you travel — then check the live Tachikawa forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
1°C average low
Wettest month
June
158 mm of rain
Driest month
January
27 mm of rain
Average temperature and rainfall in Tachikawa 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 | 1°C | -12°C / 17°C | 27 mm | 57% | 11 km/h |
| February | 11°C | 2°C | -9°C / 23°C | 41 mm | 58% | 12 km/h |
| March | 15°C | 6°C | -7°C / 28°C | 93 mm | 63% | 13 km/h |
| April | 19°C | 11°C | -3°C / 29°C | 126 mm | 66% | 13 km/h |
| May | 24°C | 15°C | 6°C / 32°C | 104 mm | 69% | 13 km/h |
| June | 26°C | 19°C | 11°C / 37°C | 158 mm | 77% | 11 km/h |
| July | 31°C | 24°C | 17°C / 38°C | 114 mm | 77% | 11 km/h |
| August | 32°C | 25°C | 18°C / 39°C | 129 mm | 76% | 11 km/h |
| September | 28°C | 21°C | 11°C / 37°C | 134 mm | 78% | 11 km/h |
| October | 22°C | 15°C | 3°C / 32°C | 128 mm | 76% | 10 km/h |
| November | 17°C | 9°C | -1°C / 26°C | 60 mm | 69% | 10 km/h |
| December | 12°C | 4°C | -9°C / 23°C | 35 mm | 60% | 10 km/h |
Best time to visit Tachikawa
The most comfortable time to visit Tachikawa is generally May to June 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 1,147 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 158 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 Tachikawa forecast for what is happening now.