Average annual temperature is 9.2 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: -16.3 °C
Number of sunny days: 87 days
Number of rainy days: 202 days
Number of snow days: 76 days
Look at detailed online map of Iwamizawa Shi
* Weather data for Iwamizawa Shi 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) | 6.7 | 6.9 | 16.1 | 17.1 | 23.8 | 28.2 | 30.7 | 32.9 | 27.6 | 22.9 | 18.1 | 12.2 |
| Average daytime temperature (°C) | -3.9 | -1.9 | 7.3 | 12.1 | 17.6 | 22.6 | 26.3 | 29.1 | 23.7 | 16.0 | 8.7 | 0.2 |
| Average temperature (°C) | -6.8 | -4.7 | 2.8 | 7.6 | 12.4 | 18.0 | 22.3 | 25.2 | 19.6 | 11.5 | 4.8 | -3.3 |
| Average night temperature (°C) | -10.0 | -7.6 | -1.1 | 4.0 | 8.0 | 14.1 | 19.1 | 22.1 | 16.2 | 8.0 | 1.3 | -6.6 |
| Absolute minimum temperature (°C) | -16.3 | -14.9 | -6.5 | -2.0 | 0.5 | 6.6 | 13.2 | 17.8 | 9.9 | 1.9 | -6.8 | -15.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 6.1 | 6.9 | 8.3 | 7.9 | 9.9 | 9.7 | 9.5 | 8.8 | 7.4 | 7.6 | 5.8 | 4.5 |
| Precipitation (mm) | 82 | 74 | 90 | 148 | 72 | 134 | 178 | 251 | 199 | 168 | 196 | 130 |
| Sunny days | 3 | 2 | 14 | 5 | 12 | 10 | 7 | 4 | 7 | 12 | 6 | 5 |
| Rainy days | 3 | 4 | 13 | 25 | 19 | 20 | 24 | 27 | 23 | 19 | 19 | 6 |
| Snow days | 25 | 22 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 20 |
The best time to visit Iwamizawa Shi during the most sunny months:
Months with the longest average daylight duration in Iwamizawa Shi:
The largest precipitation sum in Iwamizawa Shi is at