Average annual temperature is 16.1 °C
Absolute maximum temperature: 39.2 °C
Absolute minimum temperature: -5.5 °C
Number of sunny days: 153 days
Number of rainy days: 209 days
Number of snow days: 3 days
Look at detailed online map of Heya
* Weather data for Heya 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) | 13.0 | 17.4 | 24.6 | 28.4 | 32.4 | 30.9 | 39.2 | 38.2 | 35.3 | 27.2 | 25.5 | 19.2 |
| Average daytime temperature (°C) | 8.4 | 10.5 | 17.3 | 21.1 | 23.6 | 26.8 | 33.0 | 33.6 | 30.2 | 22.2 | 17.6 | 12.6 |
| Average temperature (°C) | 3.3 | 5.0 | 11.6 | 14.9 | 17.9 | 22.2 | 27.7 | 28.3 | 25.6 | 17.0 | 12.1 | 6.7 |
| Average night temperature (°C) | -0.9 | 0.2 | 6.5 | 9.6 | 13.2 | 18.7 | 23.3 | 24.6 | 22.2 | 12.7 | 7.8 | 2.4 |
| Absolute minimum temperature (°C) | -5.5 | -4.4 | -0.2 | 3.1 | 6.4 | 14.1 | 20.3 | 23.1 | 16.2 | 7.7 | 2.1 | -2.7 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.5 | 8.2 | 7.8 | 9.0 | 9.2 | 7.4 | 9.9 | 10.5 | 8.4 | 8.3 | 7.4 | 7.5 |
| Precipitation (mm) | 16 | 39 | 95 | 62 | 183 | 317 | 75 | 161 | 191 | 132 | 63 | 29 |
| Sunny days | 20 | 17 | 14 | 15 | 12 | 5 | 10 | 3 | 3 | 14 | 18 | 22 |
| Rainy days | 10 | 9 | 17 | 15 | 19 | 25 | 21 | 28 | 27 | 17 | 12 | 9 |
| Snow days | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Heya is at