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Ōta Weather by Month
Average temperatures, rainfall and humidity for Ōta, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Ōta month looks like before you travel — then check the live Ōta forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
0°C average low
Wettest month
September
149 mm of rain
Driest month
January
14 mm of rain
Average temperature and rainfall in Ōta 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 | 9°C | 0°C | -13°C / 18°C | 14 mm | 55% | 10 km/h |
| February | 10°C | 0°C | -14°C / 24°C | 38 mm | 55% | 11 km/h |
| March | 14°C | 4°C | -9°C / 28°C | 70 mm | 60% | 11 km/h |
| April | 19°C | 9°C | -4°C / 32°C | 106 mm | 63% | 11 km/h |
| May | 24°C | 14°C | 2°C / 36°C | 86 mm | 65% | 9 km/h |
| June | 26°C | 18°C | 10°C / 40°C | 147 mm | 74% | 8 km/h |
| July | 31°C | 23°C | 14°C / 40°C | 138 mm | 74% | 8 km/h |
| August | 32°C | 24°C | 15°C / 41°C | 114 mm | 73% | 8 km/h |
| September | 28°C | 20°C | 10°C / 39°C | 149 mm | 76% | 8 km/h |
| October | 21°C | 13°C | 2°C / 32°C | 101 mm | 72% | 8 km/h |
| November | 16°C | 8°C | -5°C / 27°C | 30 mm | 66% | 9 km/h |
| December | 12°C | 2°C | -10°C / 23°C | 17 mm | 59% | 10 km/h |
Best time to visit Ōta
The most comfortable time to visit Ōta 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 September, totalling about 1,010 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 149 mm, roughly 10× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Ōta forecast for what is happening now.
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