Average annual temperature is 14.1 °C
Absolute maximum temperature: 36.6 °C
Absolute minimum temperature: -6.8 °C
Number of sunny days: 86 days
Number of rainy days: 257 days
Number of snow days: 22 days
Look at detailed online map of Iwagasaki
* Weather data for Iwagasaki 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) | 14.1 | 12.0 | 21.3 | 21.5 | 27.7 | 28.4 | 31.5 | 36.6 | 33.4 | 23.7 | 25.3 | 15.7 |
| Average daytime temperature (°C) | 4.4 | 4.6 | 11.9 | 15.1 | 19.0 | 23.6 | 27.9 | 33.2 | 27.7 | 18.8 | 14.4 | 8.0 |
| Average temperature (°C) | 2.1 | 2.4 | 7.6 | 10.9 | 15.1 | 20.5 | 24.5 | 29.1 | 24.2 | 15.5 | 11.2 | 5.5 |
| Average night temperature (°C) | 0.2 | 0.4 | 3.8 | 7.5 | 11.3 | 17.7 | 21.4 | 25.7 | 21.5 | 12.7 | 8.7 | 3.1 |
| Absolute minimum temperature (°C) | -6.8 | -4.6 | -0.8 | 1.4 | 4.4 | 12.9 | 16.5 | 22.4 | 16.0 | 8.6 | 3.3 | -1.7 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| 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) | 4.0 | 4.5 | 8.1 | 7.7 | 8.5 | 8.4 | 9.3 | 11.9 | 7.9 | 7.8 | 5.7 | 3.8 |
| Precipitation (mm) | 204 | 144 | 122 | 148 | 191 | 254 | 284 | 59 | 249 | 242 | 297 | 299 |
| Sunny days | 1 | 2 | 13 | 10 | 11 | 4 | 10 | 16 | 4 | 6 | 6 | 3 |
| Rainy days | 20 | 17 | 18 | 20 | 20 | 26 | 21 | 15 | 26 | 25 | 24 | 25 |
| Snow days | 10 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Iwagasaki during the most sunny months:
The largest precipitation sum in Iwagasaki is at