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Ōmuta Weather by Month
Average temperatures, rainfall and humidity for Ōmuta, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Ōmuta month looks like before you travel — then check the live Ōmuta forecast for the days ahead.
Warmest month
August
33°C average high
Coolest month
January
2°C average low
Wettest month
June
191 mm of rain
Driest month
January
49 mm of rain
Average temperature and rainfall in Ōmuta 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 | 11°C | 2°C | -6°C / 21°C | 49 mm | 69% | 11 km/h |
| February | 12°C | 4°C | -6°C / 22°C | 69 mm | 69% | 12 km/h |
| March | 16°C | 7°C | -2°C / 26°C | 83 mm | 67% | 12 km/h |
| April | 20°C | 12°C | 2°C / 30°C | 125 mm | 68% | 11 km/h |
| May | 25°C | 16°C | 5°C / 37°C | 102 mm | 68% | 10 km/h |
| June | 27°C | 21°C | 14°C / 37°C | 191 mm | 76% | 10 km/h |
| July | 31°C | 25°C | 12°C / 39°C | 153 mm | 76% | 11 km/h |
| August | 33°C | 25°C | 18°C / 42°C | 153 mm | 73% | 10 km/h |
| September | 29°C | 22°C | 13°C / 40°C | 139 mm | 74% | 10 km/h |
| October | 24°C | 16°C | 6°C / 35°C | 72 mm | 69% | 11 km/h |
| November | 19°C | 9°C | 0°C / 29°C | 60 mm | 67% | 10 km/h |
| December | 12°C | 4°C | -4°C / 23°C | 58 mm | 66% | 11 km/h |
Best time to visit Ōmuta
The most comfortable time to visit Ōmuta is generally May and October to November, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 1,255 mm a year.
Travellers who prefer heat should aim for August, when highs average 33°C. June is the month to avoid if rain would spoil your plans — it averages 191 mm, roughly 4× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Ōmuta forecast for what is happening now.