Average annual temperature is 12.0 °C
Absolute maximum temperature: 35.5 °C
Absolute minimum temperature: -11.3 °C
Number of sunny days: 70 days
Number of rainy days: 240 days
Number of snow days: 55 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) | 10.7 | 8.7 | 20.7 | 20.2 | 24.1 | 27.9 | 30.6 | 35.5 | 32.6 | 22.5 | 23.3 | 13.3 |
| Average daytime temperature (°C) | 0.3 | 1.5 | 8.9 | 13.3 | 18.3 | 23.4 | 26.6 | 31.9 | 26.3 | 17.8 | 11.3 | 3.7 |
| Average temperature (°C) | -1.7 | -0.5 | 5.1 | 9.5 | 14.1 | 19.9 | 23.8 | 28.0 | 22.1 | 13.8 | 8.2 | 1.1 |
| Average night temperature (°C) | -3.6 | -2.6 | 1.8 | 6.6 | 10.7 | 17.2 | 21.2 | 25.0 | 19.0 | 10.8 | 5.0 | -1.5 |
| Absolute minimum temperature (°C) | -11.3 | -7.7 | -3.6 | 0.5 | 3.1 | 11.9 | 15.6 | 22.3 | 10.4 | 5.0 | -3.4 | -8.9 |
| 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) | 5.0 | 5.5 | 7.9 | 8.6 | 9.8 | 8.5 | 9.5 | 11.9 | 7.5 | 7.6 | 5.0 | 3.3 |
| Precipitation (mm) | 155 | 132 | 119 | 217 | 190 | 157 | 383 | 152 | 179 | 237 | 263 | 186 |
| Sunny days | 0 | 1 | 15 | 8 | 13 | 6 | 5 | 7 | 6 | 7 | 2 | 0 |
| Rainy days | 10 | 9 | 12 | 22 | 18 | 24 | 26 | 24 | 24 | 24 | 25 | 22 |
| Snow days | 21 | 18 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 9 |
The best time to visit Iwasaki during the most sunny months:
The largest precipitation sum in Iwasaki is at