Average annual temperature is 14.9 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -7.1 °C
Number of sunny days: 130 days
Number of rainy days: 230 days
Number of snow days: 5 days
Look at detailed online map of Koishiwara
* Weather data for Koishiwara Japan is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.7 | 15.8 | 23.0 | 26.5 | 28.1 | 29.8 | 34.0 | 34.5 | 31.4 | 25.5 | 25.6 | 20.2 |
| Average daytime temperature (°C) | 7.4 | 9.9 | 15.7 | 18.6 | 22.7 | 25.4 | 29.5 | 31.2 | 28.2 | 20.7 | 15.7 | 9.9 |
| Average temperature (°C) | 3.1 | 5.3 | 10.1 | 13.4 | 17.5 | 21.2 | 25.3 | 26.3 | 23.6 | 15.6 | 10.9 | 5.9 |
| Average night temperature (°C) | -0.2 | 1.6 | 5.6 | 9.2 | 13.4 | 18.1 | 22.3 | 23.1 | 20.5 | 11.9 | 7.1 | 2.6 |
| Absolute minimum temperature (°C) | -7.1 | -3.5 | -2.5 | 3.2 | 7.4 | 13.8 | 20.7 | 21.0 | 17.4 | 8.0 | 1.2 | -5.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 6.1 | 6.5 | 7.6 | 8.0 | 8.3 | 7.1 | 8.4 | 10.3 | 9.3 | 8.7 | 7.4 | 5.6 |
| Precipitation (mm) | 100 | 86 | 113 | 183 | 257 | 285 | 269 | 158 | 123 | 31 | 68 | 87 |
| Sunny days | 12 | 11 | 18 | 15 | 15 | 8 | 1 | 4 | 5 | 18 | 15 | 8 |
| Rainy days | 18 | 17 | 13 | 15 | 16 | 22 | 30 | 27 | 25 | 13 | 15 | 19 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
The best time to visit Koishiwara during the most sunny months:
The largest precipitation sum in Koishiwara is at