Average annual temperature is 15.6 °C
Absolute maximum temperature: 36.8 °C
Absolute minimum temperature: -7.2 °C
Number of sunny days: 107 days
Number of rainy days: 247 days
Number of snow days: 11 days
Look at detailed online map of Iwataki
* Weather data for Iwataki 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) | 15.9 | 15.0 | 23.1 | 26.9 | 30.0 | 31.3 | 34.5 | 36.8 | 34.3 | 26.6 | 25.1 | 19.7 |
| Average daytime temperature (°C) | 7.4 | 8.4 | 15.3 | 17.9 | 22.4 | 26.5 | 31.1 | 33.3 | 29.9 | 21.3 | 16.5 | 11.2 |
| Average temperature (°C) | 3.3 | 4.4 | 10.1 | 13.2 | 17.4 | 21.8 | 26.5 | 28.7 | 25.4 | 16.8 | 11.9 | 7.0 |
| Average night temperature (°C) | 0.1 | 1.2 | 5.9 | 9.4 | 13.4 | 18.3 | 23.1 | 25.3 | 22.3 | 13.3 | 8.7 | 4.0 |
| Absolute minimum temperature (°C) | -7.2 | -4.2 | -1.7 | 3.8 | 7.7 | 12.8 | 20.1 | 23.4 | 17.8 | 8.4 | 3.5 | -1.8 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.7 | 5.5 | 8.4 | 7.8 | 9.0 | 7.3 | 9.0 | 10.3 | 8.7 | 8.6 | 7.1 | 6.4 |
| Precipitation (mm) | 149 | 78 | 128 | 239 | 257 | 355 | 176 | 143 | 113 | 62 | 127 | 110 |
| Sunny days | 4 | 9 | 17 | 14 | 14 | 7 | 9 | 4 | 5 | 10 | 9 | 5 |
| Rainy days | 22 | 15 | 14 | 16 | 17 | 23 | 22 | 27 | 25 | 21 | 21 | 24 |
| Snow days | 5 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Iwataki during the most sunny months:
The largest precipitation sum in Iwataki is at