Average annual temperature is 11.8 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -15.1 °C
Number of sunny days: 91 days
Number of rainy days: 233 days
Number of snow days: 41 days
Look at detailed online map of Itanosawa
* Weather data for Itanosawa 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) | 11.3 | 9.3 | 20.9 | 23.1 | 27.2 | 29.6 | 34.2 | 35.0 | 32.2 | 24.1 | 22.6 | 14.2 |
| Average daytime temperature (°C) | 1.3 | 2.1 | 11.6 | 15.5 | 19.5 | 23.9 | 28.2 | 31.3 | 26.1 | 18.6 | 12.3 | 4.4 |
| Average temperature (°C) | -2.1 | -0.9 | 5.6 | 10.4 | 14.0 | 19.4 | 23.9 | 26.8 | 21.6 | 13.3 | 8.2 | 0.4 |
| Average night temperature (°C) | -6.0 | -4.6 | 0.6 | 6.4 | 9.3 | 15.9 | 20.2 | 23.1 | 18.0 | 8.9 | 4.7 | -3.5 |
| Absolute minimum temperature (°C) | -15.1 | -11.5 | -6.0 | -0.7 | 1.4 | 9.9 | 15.4 | 21.3 | 9.6 | 3.7 | -5.5 | -11.4 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 4.9 | 6.2 | 8.4 | 8.9 | 8.7 | 7.7 | 9.2 | 10.4 | 7.4 | 8.0 | 5.2 | 4.9 |
| Precipitation (mm) | 90 | 89 | 71 | 104 | 113 | 119 | 179 | 203 | 157 | 78 | 113 | 83 |
| Sunny days | 5 | 3 | 19 | 11 | 9 | 7 | 7 | 5 | 4 | 11 | 6 | 4 |
| Rainy days | 12 | 14 | 12 | 19 | 22 | 23 | 24 | 26 | 26 | 20 | 22 | 13 |
| Snow days | 14 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 14 |
The best time to visit Itanosawa during the most sunny months:
The largest precipitation sum in Itanosawa is at