Average annual temperature is 14.0 °C
Absolute maximum temperature: 35.3 °C
Absolute minimum temperature: -6.4 °C
Number of sunny days: 153 days
Number of rainy days: 200 days
Number of snow days: 12 days
Look at detailed online map of Iwanuma-shi
* Weather data for Iwanuma-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) | 14.3 | 15.6 | 20.1 | 24.5 | 29.0 | 30.6 | 33.9 | 35.3 | 31.2 | 24.6 | 24.6 | 17.0 |
| Average daytime temperature (°C) | 6.0 | 7.0 | 13.2 | 17.4 | 19.4 | 23.8 | 28.6 | 30.8 | 27.4 | 20.3 | 15.1 | 9.5 |
| Average temperature (°C) | 2.0 | 2.6 | 7.7 | 12.2 | 15.1 | 20.5 | 25.2 | 27.6 | 24.1 | 15.1 | 10.4 | 5.0 |
| Average night temperature (°C) | -1.4 | -1.1 | 2.9 | 7.4 | 10.7 | 17.6 | 21.9 | 24.7 | 21.3 | 10.6 | 6.5 | 1.2 |
| Absolute minimum temperature (°C) | -6.4 | -4.3 | -3.2 | 0.8 | 2.7 | 13.0 | 18.6 | 22.2 | 13.9 | 6.6 | -1.6 | -4.0 |
| 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) | 9.9 | 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) | 6.8 | 7.5 | 8.3 | 8.9 | 8.2 | 7.5 | 9.7 | 11.8 | 7.8 | 8.8 | 6.9 | 7.1 |
| Precipitation (mm) | 24 | 54 | 75 | 48 | 135 | 204 | 104 | 54 | 237 | 50 | 66 | 56 |
| Sunny days | 13 | 15 | 18 | 21 | 11 | 7 | 11 | 12 | 4 | 14 | 12 | 15 |
| Rainy days | 10 | 10 | 13 | 9 | 20 | 23 | 20 | 19 | 26 | 17 | 18 | 15 |
| Snow days | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Iwanuma-shi during the most sunny months:
The largest precipitation sum in Iwanuma-shi is at