Climate averages 1991–2020
Kasama, Japan weather
in August.
A hot, wet month: the warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Kasama, Japan: daytime highs average 28.2°C and nights cool to about 21.7°C. By daytime temperature it is the warmest month of the year.
Expect about 136 mm of rain on roughly 15 days, which makes August a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 33 min on an average August day.
The nearest other city in this atlas is Mito (17 km away). In August its highs average 28.3°C, about as warm as Kasama, Japan, with 111 mm of rain.
Among the 303 cities listed in Japan, Kasama, Japan ranks joint 239th of 303 for the warmest August highs and 115th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Kasama, Japan is 1.0°C cooler than that mean.
From August to September, average highs fall by 3.5°C to 24.6°C, and monthly rainfall rises from 136 mm to 174 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
Kasama, Japan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.6°C-1.6°C | -1.6°C | 56 | 6.7 | 10.010 h |
| February | 7.6°C-1.1°C | -1.1°C | 58 | 7.4 | 10.811 h |
| March | 11.1°C1.8°C | 1.8°C | 107 | 12.1 | 11.912 h |
| April | 16.2°C6.6°C | 6.6°C | 117 | 12.1 | 13.113 h |
| May | 20.6°C11.8°C | 11.8°C | 142 | 12.6 | 14.114 h |
| June | 23.3°C16.1°C | 16.1°C | 152 | 15.3 | 14.615 h |
| July | 26.9°C20.3°C | 20.3°C | 184 | 17.2 | 14.414 h |
| August, selected | 28.2°C21.7°C | 21.7°C | 136 | 15.0 | 13.514 h |
| September | 24.6°C18.5°C | 18.5°C | 174 | 14.8 | 12.412 h |
| October | 19.4°C12.8°C | 12.8°C | 179 | 12.4 | 11.311 h |
| November | 14.2°C6.6°C | 6.6°C | 88 | 8.5 | 10.310 h |
| December | 9.0°C1.0°C | 1.0°C | 56 | 7.3 | 9.710 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
- Mito in AugustJapan · 17 kmHigh 28.3°C · Low 22.5°C · 111 mm rain
- Ishioka in AugustJapan · 22 kmHigh 29.5°C · Low 23.1°C · 127 mm rain
- Mooka in AugustJapan · 23 kmHigh 29.6°C · Low 22.1°C · 128 mm rain
- Hitachi-Naka in AugustJapan · 24 kmHigh 27.4°C · Low 22.6°C · 131 mm rain
- Chikusei in AugustJapan · 27 kmHigh 29.9°C · Low 22.6°C · 123 mm rain
- Tsuchiura in AugustJapan · 33 kmHigh 29.9°C · Low 23.2°C · 119 mm rain
- Tsukuba in AugustJapan · 36 kmHigh 30.0°C · Low 23.0°C · 123 mm rain
- Utsunomiya in AugustJapan · 40 kmHigh 28.2°C · Low 21.0°C · 128 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 Kasama) is explained once on the Kasama, Japan year overview and on the Sources, method and limits page.