Average annual temperature is 12.9 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: -10.2 °C
Number of sunny days: 59 days
Number of rainy days: 261 days
Number of snow days: 45 days
Look at detailed online map of Kotamagawa
* Weather data for Kotamagawa 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) | 12.3 | 9.5 | 18.3 | 23.9 | 28.6 | 27.3 | 31.9 | 35.4 | 32.5 | 22.3 | 24.3 | 14.2 |
| Average daytime temperature (°C) | 2.0 | 2.7 | 9.9 | 14.6 | 19.4 | 23.6 | 27.9 | 32.3 | 27.2 | 17.5 | 13.2 | 6.4 |
| Average temperature (°C) | -0.5 | 0.3 | 6.1 | 10.1 | 15.2 | 20.1 | 24.6 | 27.8 | 23.3 | 14.1 | 9.7 | 3.5 |
| Average night temperature (°C) | -2.4 | -1.9 | 2.4 | 6.3 | 11.9 | 17.4 | 21.8 | 24.4 | 20.8 | 11.3 | 6.8 | 0.8 |
| Absolute minimum temperature (°C) | -10.2 | -5.9 | -4.1 | -0.7 | 3.9 | 12.6 | 16.7 | 22.0 | 14.9 | 6.0 | -0.4 | -6.7 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 2.3 | 3.3 | 7.5 | 7.5 | 7.9 | 7.6 | 9.1 | 11.8 | 7.5 | 7.6 | 5.0 | 3.1 |
| Precipitation (mm) | 296 | 244 | 180 | 179 | 192 | 314 | 284 | 112 | 243 | 237 | 309 | 360 |
| Sunny days | 0 | 1 | 14 | 9 | 10 | 3 | 4 | 4 | 3 | 6 | 4 | 1 |
| Rainy days | 9 | 15 | 14 | 20 | 21 | 27 | 27 | 27 | 27 | 25 | 25 | 24 |
| Snow days | 22 | 12 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 |
The best time to visit Kotamagawa during the most sunny months:
The largest precipitation sum in Kotamagawa is at