Climate averages 1991–2020
Ōsaki weather
in August.
A warm, wet month: the warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Ōsaki: daytime highs average 27.2°C and nights cool to about 20.4°C. By daytime temperature it is the warmest month of the year.
Expect about 165 mm of rain on roughly 16 days, which makes August a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 40 min on an average August day.
The nearest other city in this atlas is Tome (21 km away). In August its highs average 27.1°C, about as warm as Ōsaki, with 135 mm of rain.
Among the 303 cities listed in Japan, Ōsaki ranks joint 271st of 303 for the warmest August highs and joint 205th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Ōsaki is 2.0°C cooler than that mean.
From August to September, average highs fall by 3.5°C to 23.6°C, and monthly rainfall rises from 165 mm to 168 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
Ōsaki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.6°C-4.2°C | -4.2°C | 56 | 9.2 | 9.810 h |
| February | 4.5°C-4.2°C | -4.2°C | 48 | 8.2 | 10.711 h |
| March | 8.6°C-1.3°C | -1.3°C | 89 | 11.0 | 11.912 h |
| April | 14.6°C3.9°C | 3.9°C | 97 | 11.4 | 13.213 h |
| May | 19.6°C9.8°C | 9.8°C | 109 | 11.4 | 14.314 h |
| June | 22.6°C14.6°C | 14.6°C | 132 | 12.8 | 14.815 h |
| July | 25.8°C19.0°C | 19.0°C | 188 | 16.7 | 14.615 h |
| August, selected | 27.2°C20.4°C | 20.4°C | 165 | 15.5 | 13.714 h |
| September | 23.6°C16.7°C | 16.7°C | 168 | 14.0 | 12.512 h |
| October | 18.2°C9.9°C | 9.9°C | 141 | 10.7 | 11.211 h |
| November | 12.2°C3.4°C | 3.4°C | 65 | 8.5 | 10.110 h |
| December | 6.2°C-1.5°C | -1.5°C | 58 | 9.6 | 9.510 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
- Tome in AugustJapan · 21 kmHigh 27.1°C · Low 20.5°C · 135 mm rain
- Ishinomaki in AugustJapan · 34 kmHigh 25.6°C · Low 21.8°C · 131 mm rain
- Sendai in AugustJapan · 37 kmHigh 26.2°C · Low 21.0°C · 169 mm rain
- Ichinoseki in AugustJapan · 39 kmHigh 26.9°C · Low 19.8°C · 142 mm rain
- Natori-shi in AugustJapan · 48 kmHigh 26.0°C · Low 21.4°C · 162 mm rain
- Ōshū in AugustJapan · 64 kmHigh 27.0°C · Low 19.9°C · 153 mm rain
- Yamagata in AugustJapan · 66 kmHigh 26.9°C · Low 19.5°C · 146 mm rain
- Kitakami in AugustJapan · 78 kmHigh 26.4°C · Low 19.3°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 Ōsaki) is explained once on the Ōsaki year overview and on the Sources, method and limits page.