Climate averages 1991–2020
Ōtawara weather
in August.
A warm, 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 warm month in Ōtawara: daytime highs average 27.9°C and nights cool to about 20.7°C. By daytime temperature it is the warmest month of the year.
Expect about 162 mm of rain on roughly 17 days, which makes August a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 34 min on an average August day.
The nearest other city in this atlas is Nasushiobara (13 km away). In August its highs average 27.8°C, about as warm as Ōtawara, with 190 mm of rain.
Among the 303 cities listed in Japan, Ōtawara ranks joint 249th of 303 for the warmest August highs and joint 194th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Ōtawara is 1.3°C cooler than that mean.
From August to September, average highs fall by 3.8°C to 24.0°C, and monthly rainfall rises from 162 mm to 193 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
Ōtawara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.3°C-2.9°C | -2.9°C | 54 | 7.1 | 9.910 h |
| February | 6.2°C-2.6°C | -2.6°C | 54 | 7.6 | 10.811 h |
| March | 10.0°C-0.1°C | -0.1°C | 104 | 12.5 | 11.912 h |
| April | 15.7°C4.9°C | 4.9°C | 121 | 12.4 | 13.113 h |
| May | 20.6°C10.3°C | 10.3°C | 142 | 13.4 | 14.114 h |
| June | 23.5°C15.2°C | 15.2°C | 163 | 16.2 | 14.615 h |
| July | 26.8°C19.5°C | 19.5°C | 212 | 19.7 | 14.414 h |
| August, selected | 27.9°C20.7°C | 20.7°C | 162 | 16.7 | 13.614 h |
| September | 24.0°C17.0°C | 17.0°C | 193 | 15.3 | 12.512 h |
| October | 18.6°C10.8°C | 10.8°C | 169 | 12.9 | 11.311 h |
| November | 13.3°C4.3°C | 4.3°C | 80 | 8.4 | 10.210 h |
| December | 8.1°C-0.3°C | -0.3°C | 51 | 6.8 | 9.710 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
- Nasushiobara in AugustJapan · 13 kmHigh 27.8°C · Low 20.6°C · 190 mm rain
- Utsunomiya in AugustJapan · 36 kmHigh 28.2°C · Low 21.0°C · 128 mm rain
- Nikkō in AugustJapan · 39 kmHigh 26.4°C · Low 19.8°C · 259 mm rain
- Kanuma in AugustJapan · 44 kmHigh 28.0°C · Low 21.2°C · 207 mm rain
- Mooka in AugustJapan · 48 kmHigh 29.6°C · Low 22.1°C · 128 mm rain
- Sukagawa in AugustJapan · 56 kmHigh 27.8°C · Low 20.5°C · 141 mm rain
- Kasama, Japan in AugustJapan · 58 kmHigh 28.2°C · Low 21.7°C · 136 mm rain
- Tochigi in AugustJapan · 60 kmHigh 29.3°C · Low 22.2°C · 207 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 Ōtawara) is explained once on the Ōtawara year overview and on the Sources, method and limits page.