Climate averages 1991–2020
Kai 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 Kai: daytime highs average 29.1°C and nights cool to about 21.5°C. By daytime temperature it is the warmest month of the year.
Expect about 139 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 30 min on an average August day.
The nearest other city in this atlas is Kofu (6 km away). In August its highs average 29.5°C, about as warm as Kai, with 139 mm of rain.
Among the 303 cities listed in Japan, Kai ranks joint 189th of 303 for the warmest August highs and joint 119th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Kai is level with that mean.
From August to September, average highs fall by 3.9°C to 25.3°C, and monthly rainfall rises from 139 mm to 185 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
Kai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.8°C-2.4°C | -2.4°C | 65 | 6.8 | 10.010 h |
| February | 6.9°C-2.2°C | -2.2°C | 73 | 8.1 | 10.911 h |
| March | 11.0°C1.4°C | 1.4°C | 125 | 12.8 | 11.912 h |
| April | 17.4°C7.0°C | 7.0°C | 120 | 12.6 | 13.113 h |
| May | 22.2°C12.3°C | 12.3°C | 129 | 12.8 | 14.014 h |
| June | 24.9°C16.7°C | 16.7°C | 177 | 16.3 | 14.515 h |
| July | 28.3°C20.6°C | 20.6°C | 199 | 17.4 | 14.314 h |
| August, selected | 29.1°C21.5°C | 21.5°C | 139 | 16.8 | 13.514 h |
| September | 25.3°C17.8°C | 17.8°C | 185 | 14.6 | 12.412 h |
| October | 19.8°C11.9°C | 11.9°C | 186 | 13.0 | 11.311 h |
| November | 14.6°C6.3°C | 6.3°C | 85 | 9.2 | 10.310 h |
| December | 8.9°C1.2°C | 1.2°C | 60 | 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
- Kofu in AugustJapan · 6 kmHigh 29.5°C · Low 21.8°C · 139 mm rain
- Minami-Alps in AugustJapan · 9 kmHigh 29.0°C · Low 21.5°C · 192 mm rain
- Fujinomiya in AugustJapan · 53 kmHigh 28.5°C · Low 22.4°C · 254 mm rain
- Gotemba in AugustJapan · 57 kmHigh 28.0°C · Low 21.7°C · 185 mm rain
- Saku in AugustJapan · 59 kmHigh 27.8°C · Low 20.2°C · 174 mm rain
- Fuji, Japan in AugustJapan · 60 kmHigh 29.4°C · Low 23.5°C · 196 mm rain
- Iida in AugustJapan · 65 kmHigh 28.8°C · Low 20.9°C · 184 mm rain
- Akiruno in AugustJapan · 65 kmHigh 28.9°C · Low 22.4°C · 205 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 Kai) is explained once on the Kai year overview and on the Sources, method and limits page.
Kofu lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.