Average annual temperature is 16.4 °C
Absolute maximum temperature: 35.6 °C
Absolute minimum temperature: -5.1 °C
Number of sunny days: 164 days
Number of rainy days: 201 days
Look at detailed online map of Iwakuni
* Weather data for Iwakuni 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) | 17.5 | 15.0 | 21.2 | 25.1 | 30.1 | 30.8 | 35.3 | 35.6 | 34.8 | 28.9 | 27.5 | 21.5 |
| Average daytime temperature (°C) | 10.0 | 11.0 | 16.6 | 19.4 | 23.4 | 26.5 | 31.3 | 32.4 | 30.3 | 23.4 | 18.2 | 12.3 |
| Average temperature (°C) | 5.1 | 6.2 | 11.1 | 14.5 | 18.6 | 22.3 | 26.9 | 28.2 | 25.8 | 17.4 | 12.7 | 7.3 |
| Average night temperature (°C) | 1.4 | 2.2 | 6.4 | 10.4 | 14.7 | 19.0 | 23.5 | 24.9 | 22.3 | 12.7 | 8.6 | 3.2 |
| Absolute minimum temperature (°C) | -5.1 | -2.3 | -2.3 | 4.2 | 6.3 | 13.2 | 19.5 | 23.0 | 18.6 | 8.2 | 1.2 | -2.5 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.1 | 7.0 | 8.3 | 8.0 | 8.7 | 7.4 | 9.1 | 9.6 | 9.3 | 8.4 | 8.2 | 7.0 |
| Precipitation (mm) | 66 | 77 | 108 | 245 | 228 | 286 | 157 | 168 | 100 | 17 | 35 | 65 |
| Sunny days | 19 | 15 | 19 | 16 | 13 | 9 | 7 | 2 | 7 | 23 | 16 | 18 |
| Rainy days | 12 | 13 | 12 | 14 | 18 | 21 | 24 | 29 | 23 | 8 | 14 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Iwakuni is at