Average annual temperature is 11.6 °C
Absolute maximum temperature: 34.6 °C
Absolute minimum temperature: -11.7 °C
Number of sunny days: 72 days
Number of rainy days: 250 days
Number of snow days: 43 days
Look at detailed online map of Iwaikawa
* Weather data for Iwaikawa 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) | 7.8 | 8.4 | 17.5 | 21.8 | 27.4 | 27.8 | 31.3 | 34.6 | 33.7 | 22.1 | 22.1 | 13.9 |
| Average daytime temperature (°C) | 0.5 | 1.2 | 9.6 | 14.3 | 18.5 | 23.2 | 27.1 | 31.8 | 26.7 | 17.1 | 11.3 | 4.5 |
| Average temperature (°C) | -2.0 | -1.4 | 4.6 | 9.3 | 13.8 | 19.1 | 23.2 | 27.1 | 22.3 | 12.8 | 7.9 | 1.6 |
| Average night temperature (°C) | -4.2 | -3.6 | 0.4 | 5.4 | 9.9 | 16.0 | 20.1 | 24.0 | 19.5 | 9.8 | 4.8 | -1.3 |
| Absolute minimum temperature (°C) | -11.7 | -8.1 | -5.4 | -1.8 | 1.6 | 10.7 | 15.6 | 20.8 | 12.4 | 2.6 | -3.1 | -7.2 |
| 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) | 4.4 | 5.0 | 8.2 | 8.3 | 8.5 | 8.0 | 8.9 | 11.3 | 7.5 | 7.9 | 5.2 | 3.4 |
| Precipitation (mm) | 178 | 169 | 101 | 160 | 165 | 232 | 266 | 84 | 186 | 213 | 294 | 215 |
| Sunny days | 0 | 4 | 12 | 11 | 11 | 5 | 3 | 5 | 3 | 8 | 6 | 4 |
| Rainy days | 12 | 10 | 18 | 19 | 20 | 25 | 28 | 26 | 27 | 23 | 21 | 21 |
| Snow days | 19 | 14 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 |
The best time to visit Iwaikawa during the most sunny months:
The largest precipitation sum in Iwaikawa is at