Average annual temperature is 13.7 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -7.0 °C
Number of sunny days: 129 days
Number of rainy days: 221 days
Number of snow days: 15 days
Look at detailed online map of Iwakiri
* Weather data for Iwakiri 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) | 13.7 | 15.2 | 18.6 | 23.6 | 26.6 | 29.1 | 34.2 | 34.4 | 30.5 | 25.2 | 23.6 | 15.8 |
| Average daytime temperature (°C) | 5.3 | 6.3 | 12.7 | 16.8 | 19.2 | 23.6 | 28.6 | 30.3 | 27.2 | 20.3 | 14.9 | 9.1 |
| Average temperature (°C) | 1.4 | 1.9 | 7.4 | 11.7 | 15.1 | 20.4 | 25.0 | 27.5 | 23.9 | 15.1 | 10.0 | 4.4 |
| Average night temperature (°C) | -1.8 | -1.8 | 2.8 | 7.0 | 11.0 | 17.6 | 21.7 | 24.9 | 21.1 | 10.9 | 6.3 | 0.9 |
| Absolute minimum temperature (°C) | -7.0 | -6.4 | -3.1 | 0.5 | 3.4 | 12.4 | 18.3 | 23.1 | 14.7 | 6.7 | -1.4 | -4.7 |
| 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) | 6.9 | 7.5 | 8.4 | 9.0 | 8.3 | 7.6 | 9.6 | 11.7 | 7.8 | 8.7 | 7.0 | 6.8 |
| Precipitation (mm) | 21 | 59 | 78 | 61 | 140 | 206 | 106 | 66 | 294 | 52 | 73 | 69 |
| Sunny days | 12 | 13 | 17 | 17 | 12 | 4 | 8 | 6 | 3 | 12 | 12 | 13 |
| Rainy days | 12 | 9 | 14 | 13 | 19 | 26 | 23 | 25 | 27 | 19 | 18 | 16 |
| Snow days | 7 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Iwakiri during the most sunny months:
The largest precipitation sum in Iwakiri is at