Average annual temperature is 11.3 °C
Absolute maximum temperature: 34.7 °C
Absolute minimum temperature: -13.4 °C
Number of sunny days: 104 days
Number of rainy days: 215 days
Number of snow days: 46 days
Look at detailed online map of Jōnai
* Weather data for Jōnai 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) | 11.5 | 9.4 | 20.1 | 21.7 | 29.4 | 30.5 | 34.1 | 34.7 | 32.7 | 24.4 | 22.8 | 14.2 |
| Average daytime temperature (°C) | 0.7 | 1.2 | 10.9 | 15.1 | 18.8 | 22.8 | 28.0 | 30.7 | 25.1 | 17.7 | 11.6 | 4.0 |
| Average temperature (°C) | -2.9 | -2.3 | 5.2 | 9.8 | 13.5 | 18.7 | 23.7 | 26.4 | 21.3 | 13.1 | 7.5 | 0.3 |
| Average night temperature (°C) | -5.8 | -5.4 | 0.9 | 5.9 | 9.7 | 15.9 | 20.6 | 23.4 | 18.7 | 10.0 | 4.4 | -2.6 |
| Absolute minimum temperature (°C) | -13.4 | -11.4 | -5.6 | 0.4 | 1.9 | 10.6 | 15.0 | 20.7 | 11.8 | 3.9 | -5.6 | -9.3 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.3 |
| 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) | 6.0 | 6.8 | 8.6 | 8.9 | 8.7 | 8.0 | 9.7 | 10.3 | 7.1 | 8.4 | 5.8 | 5.5 |
| Precipitation (mm) | 66 | 61 | 68 | 96 | 142 | 158 | 181 | 233 | 183 | 82 | 76 | 84 |
| Sunny days | 10 | 7 | 19 | 11 | 8 | 8 | 6 | 5 | 4 | 8 | 8 | 10 |
| Rainy days | 3 | 5 | 11 | 19 | 23 | 22 | 25 | 26 | 26 | 23 | 19 | 13 |
| Snow days | 18 | 16 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 8 |
The best time to visit Jōnai during the most sunny months:
The largest precipitation sum in Jōnai is at