Average annual temperature is 12.3 °C
Absolute maximum temperature: 36.0 °C
Absolute minimum temperature: -12.1 °C
Number of sunny days: 72 days
Number of rainy days: 258 days
Number of snow days: 35 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) | 11.1 | 9.4 | 20.2 | 23.6 | 29.3 | 29.1 | 32.4 | 36.0 | 35.3 | 23.0 | 24.1 | 14.9 |
| Average daytime temperature (°C) | 1.7 | 2.5 | 12.0 | 15.8 | 20.1 | 24.6 | 28.4 | 33.0 | 27.8 | 18.4 | 12.8 | 5.8 |
| Average temperature (°C) | -1.2 | -0.5 | 5.3 | 10.1 | 14.4 | 20.0 | 23.9 | 27.8 | 22.9 | 13.3 | 8.6 | 2.3 |
| Average night temperature (°C) | -4.1 | -3.4 | -0.1 | 5.1 | 9.3 | 16.1 | 20.1 | 23.6 | 19.5 | 9.3 | 5.1 | -0.8 |
| Absolute minimum temperature (°C) | -12.1 | -9.5 | -8.5 | -2.3 | 1.2 | 11.3 | 16.4 | 19.5 | 10.3 | 2.8 | -4.2 | -7.1 |
| 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) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.5 | 5.2 | 8.2 | 8.2 | 8.7 | 8.1 | 8.9 | 11.6 | 7.5 | 7.7 | 5.1 | 3.3 |
| Precipitation (mm) | 135 | 113 | 95 | 147 | 155 | 194 | 285 | 83 | 230 | 176 | 269 | 189 |
| Sunny days | 0 | 4 | 15 | 11 | 10 | 4 | 5 | 7 | 3 | 5 | 5 | 3 |
| Rainy days | 17 | 10 | 15 | 19 | 21 | 26 | 26 | 24 | 27 | 26 | 24 | 23 |
| Snow days | 14 | 14 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 5 |
The best time to visit Iwasaki during the most sunny months:
The largest precipitation sum in Iwasaki is at