Climate averages 1991–2020
Ōshū weather
in August.
A warm, wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Ōshū: daytime highs average 27.0°C and nights cool to about 19.9°C. By daytime temperature it is the warmest month of the year.
Expect about 153 mm of rain on roughly 15 days, which makes August a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 42 min on an average August day.
The nearest other city in this atlas is Kitakami (17 km away). In August its highs average 26.4°C, 0.5°C cooler than Ōshū, with 162 mm of rain.
Among the 303 cities listed in Japan, Ōshū ranks 276th of 303 for the warmest August highs and 166th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Ōshū is 2.2°C cooler than that mean.
From August to September, average highs fall by 3.7°C to 23.2°C, and monthly rainfall falls from 153 mm to 151 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
Ōshū climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.0°C-5.5°C | -5.5°C | 59 | 10.8 | 9.810 h |
| February | 3.0°C-5.4°C | -5.4°C | 53 | 10.2 | 10.711 h |
| March | 7.5°C-1.8°C | -1.8°C | 92 | 13.2 | 11.912 h |
| April | 14.1°C3.6°C | 3.6°C | 98 | 13.4 | 13.213 h |
| May | 19.3°C9.3°C | 9.3°C | 110 | 12.4 | 14.314 h |
| June | 22.5°C14.1°C | 14.1°C | 123 | 12.9 | 14.915 h |
| July | 25.7°C18.6°C | 18.6°C | 166 | 16.4 | 14.615 h |
| August, selected | 27.0°C19.9°C | 19.9°C | 153 | 15.2 | 13.714 h |
| September | 23.2°C16.1°C | 16.1°C | 151 | 13.5 | 12.512 h |
| October | 17.5°C9.3°C | 9.3°C | 120 | 11.2 | 11.211 h |
| November | 11.3°C3.0°C | 3.0°C | 73 | 11.7 | 10.110 h |
| December | 4.9°C-1.9°C | -1.9°C | 68 | 12.4 | 9.59 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
- Kitakami in AugustJapan · 17 kmHigh 26.4°C · Low 19.3°C · 162 mm rain
- Ichinoseki in AugustJapan · 25 kmHigh 26.9°C · Low 19.8°C · 142 mm rain
- Hanamaki in AugustJapan · 28 kmHigh 26.5°C · Low 19.3°C · 141 mm rain
- Tome in AugustJapan · 48 kmHigh 27.1°C · Low 20.5°C · 135 mm rain
- Yokote in AugustJapan · 57 kmHigh 27.1°C · Low 19.9°C · 180 mm rain
- Morioka in AugustJapan · 62 kmHigh 25.9°C · Low 18.8°C · 137 mm rain
- Ōsaki in AugustJapan · 64 kmHigh 27.2°C · Low 20.4°C · 165 mm rain
- Daisen in AugustJapan · 67 kmHigh 27.2°C · Low 20.0°C · 173 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 Ōshū) is explained once on the Ōshū year overview and on the Sources, method and limits page.