Climate averages 1991–2020
Aihara 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 Aihara: daytime highs average 28.4°C and nights cool to about 22.2°C. By daytime temperature it is the warmest month of the year.
Expect about 160 mm of rain on roughly 16 days, which makes August a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average August day.
The nearest other city in this atlas is Hachiōji (6 km away). In August its highs average 28.6°C, about as warm as Aihara, with 205 mm of rain.
Among the 303 cities listed in Japan, Aihara ranks joint 227th of 303 for the warmest August highs and joint 187th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Aihara is 0.8°C cooler than that mean.
From August to September, average highs fall by 3.5°C to 24.9°C, and monthly rainfall rises from 160 mm to 229 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
Aihara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.7°C-1.8°C | -1.8°C | 82 | 8.4 | 10.010 h |
| February | 8.4°C-1.3°C | -1.3°C | 85 | 10.2 | 10.911 h |
| March | 11.8°C2.2°C | 2.2°C | 154 | 15.4 | 11.912 h |
| April | 16.7°C7.4°C | 7.4°C | 147 | 14.4 | 13.113 h |
| May | 20.9°C12.6°C | 12.6°C | 158 | 13.6 | 14.014 h |
| June | 23.6°C16.9°C | 16.9°C | 203 | 16.4 | 14.515 h |
| July | 27.3°C21.1°C | 21.1°C | 205 | 17.4 | 14.314 h |
| August, selected | 28.4°C22.2°C | 22.2°C | 160 | 16.3 | 13.514 h |
| September | 24.9°C18.8°C | 18.8°C | 229 | 16.1 | 12.412 h |
| October | 19.7°C13.0°C | 13.0°C | 231 | 14.5 | 11.311 h |
| November | 14.9°C7.0°C | 7.0°C | 110 | 11.7 | 10.310 h |
| December | 10.2°C1.3°C | 1.3°C | 76 | 8.8 | 9.810 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
- Hachiōji in AugustJapan · 6 kmHigh 28.6°C · Low 22.2°C · 205 mm rain
- Sagamihara in AugustJapan · 8 kmHigh 28.5°C · Low 22.2°C · 160 mm rain
- Hino in AugustJapan · 11 kmHigh 28.7°C · Low 22.4°C · 142 mm rain
- Machida in AugustJapan · 14 kmHigh 27.6°C · Low 22.7°C · 125 mm rain
- Tama in AugustJapan · 15 kmHigh 28.1°C · Low 22.5°C · 142 mm rain
- Akiruno in AugustJapan · 16 kmHigh 28.9°C · Low 22.4°C · 205 mm rain
- Minamirinkan in AugustJapan · 16 kmHigh 28.0°C · Low 22.7°C · 125 mm rain
- Fuchū in AugustJapan · 17 kmHigh 28.9°C · Low 22.8°C · 142 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 Aihara) is explained once on the Aihara year overview and on the Sources, method and limits page.
Sagamihara, Atsugi and Isehara lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.