Average annual temperature is 15.2 °C
Absolute maximum temperature: 34.8 °C
Absolute minimum temperature: -6.0 °C
Number of sunny days: 156 days
Number of rainy days: 207 days
Number of snow days: 2 days
Look at detailed online map of Iwakuni Shi
* Weather data for Iwakuni Shi 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) | 17.8 | 15.1 | 21.4 | 25.7 | 29.6 | 31.3 | 34.7 | 34.8 | 34.8 | 27.9 | 27.0 | 20.3 |
| Average daytime temperature (°C) | 8.9 | 10.3 | 16.1 | 18.7 | 22.8 | 26.0 | 30.4 | 31.5 | 29.4 | 22.1 | 17.0 | 11.2 |
| Average temperature (°C) | 3.7 | 4.9 | 10.1 | 13.4 | 17.5 | 21.3 | 25.9 | 26.9 | 24.5 | 15.9 | 11.4 | 6.1 |
| Average night temperature (°C) | -0.3 | 0.6 | 4.9 | 9.1 | 13.1 | 17.8 | 22.5 | 23.7 | 20.9 | 11.1 | 7.2 | 2.1 |
| Absolute minimum temperature (°C) | -6.0 | -4.1 | -4.5 | 2.3 | 4.6 | 11.0 | 18.1 | 20.9 | 17.5 | 5.4 | -0.2 | -3.1 |
| 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 | 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) | 7.0 | 6.9 | 8.2 | 7.8 | 8.5 | 7.2 | 8.8 | 9.2 | 8.9 | 8.4 | 8.3 | 6.8 |
| Precipitation (mm) | 69 | 81 | 95 | 239 | 253 | 265 | 161 | 190 | 117 | 13 | 33 | 68 |
| Sunny days | 19 | 14 | 16 | 14 | 13 | 8 | 3 | 4 | 6 | 24 | 18 | 17 |
| Rainy days | 11 | 14 | 15 | 16 | 18 | 22 | 28 | 27 | 24 | 7 | 12 | 13 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The largest precipitation sum in Iwakuni Shi is at