Climate averages 1991–2020
Ōmuta weather
in August.
A hot, wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Ōmuta: daytime highs average 30.2°C and nights cool to about 24.2°C. By daytime temperature it is the warmest month of the year.
Expect about 159 mm of rain on roughly 13 days, which makes August a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 22 min on an average August day.
The nearest other city in this atlas is Saga (26 km away). In August its highs average 30.4°C, about as warm as Ōmuta, with 181 mm of rain.
Among the 303 cities listed in Japan, Ōmuta ranks joint 78th of 303 for the warmest August highs and joint 184th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Ōmuta is 1.0°C warmer than that mean.
From August to September, average highs fall by 2.9°C to 27.3°C, and monthly rainfall rises from 159 mm to 165 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ōmuta climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.2°C3.6°C | 3.6°C | 62 | 8.1 | 10.210 h |
| February | 10.6°C3.8°C | 3.8°C | 85 | 9.0 | 11.011 h |
| March | 13.9°C6.4°C | 6.4°C | 128 | 11.7 | 12.012 h |
| April | 18.7°C10.4°C | 10.4°C | 145 | 10.9 | 13.013 h |
| May | 23.0°C15.0°C | 15.0°C | 172 | 11.1 | 13.814 h |
| June | 25.6°C19.3°C | 19.3°C | 393 | 16.7 | 14.314 h |
| July | 28.8°C23.3°C | 23.3°C | 330 | 16.7 | 14.114 h |
| August, selected | 30.2°C24.2°C | 24.2°C | 159 | 12.7 | 13.413 h |
| September | 27.3°C21.0°C | 21.0°C | 165 | 10.7 | 12.412 h |
| October | 22.4°C15.5°C | 15.5°C | 101 | 7.4 | 11.411 h |
| November | 16.9°C10.3°C | 10.3°C | 90 | 7.8 | 10.510 h |
| December | 11.5°C5.6°C | 5.6°C | 72 | 7.7 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Saga in AugustJapan · 26 kmHigh 30.4°C · Low 23.9°C · 181 mm rain
- Kurume in AugustJapan · 32 kmHigh 30.8°C · Low 23.5°C · 175 mm rain
- Kumamoto in AugustJapan · 34 kmHigh 30.4°C · Low 24.0°C · 135 mm rain
- Tosu in AugustJapan · 38 kmHigh 30.8°C · Low 23.6°C · 175 mm rain
- Isahaya in AugustJapan · 44 kmHigh 29.1°C · Low 24.8°C · 185 mm rain
- Ōmura in AugustJapan · 48 kmHigh 29.9°C · Low 25.5°C · 179 mm rain
- Kasuga in AugustJapan · 55 kmHigh 31.1°C · Low 24.0°C · 171 mm rain
- Honmachi in AugustJapan · 60 kmHigh 30.8°C · Low 24.6°C · 162 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ōmuta) is explained once on the Ōmuta year overview and on the Sources, method and limits page.