Climate averages 1991–2020
Komae 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 Komae: daytime highs average 28.9°C and nights cool to about 23.5°C. By daytime temperature it is the warmest month of the year.
Expect about 142 mm of rain on roughly 15 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 Musashino (8 km away). In August its highs average 29.2°C, about as warm as Komae, with 142 mm of rain.
Among the 303 cities listed in Japan, Komae ranks joint 204th of 303 for the warmest August highs and joint 129th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Komae is 0.2°C cooler than that mean.
From August to September, average highs fall by 3.4°C to 25.5°C, and monthly rainfall rises from 142 mm to 204 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
Komae climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.1°C0.1°C | 0.1°C | 69 | 7.5 | 10.010 h |
| February | 8.9°C0.5°C | 0.5°C | 66 | 8.5 | 10.911 h |
| March | 12.1°C3.9°C | 3.9°C | 120 | 13.2 | 11.912 h |
| April | 16.8°C8.9°C | 8.9°C | 123 | 12.8 | 13.113 h |
| May | 21.1°C14.1°C | 14.1°C | 139 | 13.1 | 14.014 h |
| June | 23.9°C18.2°C | 18.2°C | 177 | 15.4 | 14.515 h |
| July | 27.5°C22.1°C | 22.1°C | 182 | 16.4 | 14.314 h |
| August, selected | 28.9°C23.5°C | 23.5°C | 142 | 15.4 | 13.514 h |
| September | 25.5°C20.2°C | 20.2°C | 204 | 14.9 | 12.412 h |
| October | 20.3°C14.4°C | 14.4°C | 215 | 13.7 | 11.311 h |
| November | 15.4°C8.5°C | 8.5°C | 92 | 10.2 | 10.310 h |
| December | 10.6°C3.1°C | 3.1°C | 61 | 7.4 | 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
- Musashino in AugustJapan · 8 kmHigh 29.2°C · Low 23.1°C · 142 mm rain
- Fuchū in AugustJapan · 10 kmHigh 28.9°C · Low 22.8°C · 142 mm rain
- Tama in AugustJapan · 10 kmHigh 28.1°C · Low 22.5°C · 142 mm rain
- Tokyo in AugustJapan · 12 kmHigh 29.5°C · Low 23.4°C · 110 mm rain
- Ōta in AugustJapan · 15 kmHigh 29.2°C · Low 23.8°C · 102 mm rain
- Machida in AugustJapan · 15 kmHigh 27.6°C · Low 22.7°C · 125 mm rain
- Hino in AugustJapan · 16 kmHigh 28.7°C · Low 22.4°C · 142 mm rain
- Kawasaki in AugustJapan · 18 kmHigh 29.0°C · Low 24.1°C · 102 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 Komae) is explained once on the Komae year overview and on the Sources, method and limits page.
Tokorozawa, Fuchū and Hino lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.