Average annual temperature is 10.7 °C
Absolute maximum temperature: 33.7 °C
Absolute minimum temperature: -14.2 °C
Number of sunny days: 97 days
Number of rainy days: 217 days
Number of snow days: 51 days
Look at detailed online map of Iwasaki
* Weather data for Iwasaki 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) | 10.0 | 8.4 | 20.9 | 22.3 | 27.7 | 28.9 | 32.6 | 33.7 | 32.0 | 23.2 | 21.4 | 13.1 |
| Average daytime temperature (°C) | 0.1 | 0.6 | 10.4 | 14.5 | 18.3 | 22.7 | 27.3 | 30.3 | 24.7 | 17.1 | 10.9 | 3.2 |
| Average temperature (°C) | -3.4 | -2.9 | 4.5 | 9.2 | 13.0 | 18.3 | 22.9 | 25.8 | 20.7 | 12.5 | 6.9 | -0.3 |
| Average night temperature (°C) | -6.3 | -6.1 | 0.1 | 5.3 | 9.0 | 15.3 | 19.8 | 22.9 | 18.0 | 9.2 | 3.9 | -3.3 |
| Absolute minimum temperature (°C) | -14.2 | -13.2 | -11.8 | -0.9 | 0.8 | 9.9 | 14.6 | 19.9 | 10.0 | 3.6 | -5.6 | -12.7 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.4 |
| 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) | 6.2 | 6.9 | 8.7 | 9.0 | 8.7 | 8.1 | 9.7 | 10.4 | 7.3 | 8.5 | 5.9 | 5.6 |
| Precipitation (mm) | 64 | 63 | 73 | 82 | 120 | 154 | 190 | 202 | 187 | 89 | 83 | 87 |
| Sunny days | 7 | 5 | 18 | 13 | 9 | 7 | 6 | 7 | 1 | 10 | 6 | 8 |
| Rainy days | 4 | 6 | 12 | 17 | 22 | 23 | 25 | 24 | 29 | 21 | 21 | 13 |
| Snow days | 20 | 17 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 10 |
The best time to visit Iwasaki during the most sunny months:
The largest precipitation sum in Iwasaki is at