Average annual temperature is 10.9 °C
Absolute maximum temperature: 33.8 °C
Absolute minimum temperature: -13.7 °C
Number of sunny days: 74 days
Number of rainy days: 224 days
Number of snow days: 67 days
Look at detailed online map of Hachimantai
* Weather data for Hachimantai 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) | 8.2 | 7.6 | 16.5 | 21.2 | 26.0 | 28.0 | 31.1 | 33.8 | 31.3 | 21.4 | 22.6 | 12.2 |
| Average daytime temperature (°C) | -0.6 | 0.5 | 8.9 | 13.6 | 18.1 | 22.8 | 26.5 | 31.1 | 25.6 | 16.8 | 10.7 | 3.2 |
| Average temperature (°C) | -3.1 | -2.0 | 4.1 | 8.8 | 13.1 | 18.8 | 22.8 | 26.3 | 21.3 | 12.5 | 7.2 | 0.4 |
| Average night temperature (°C) | -5.4 | -4.2 | 0.2 | 5.1 | 9.3 | 15.4 | 19.7 | 23.0 | 18.1 | 9.5 | 4.0 | -2.4 |
| Absolute minimum temperature (°C) | -13.7 | -9.7 | -4.4 | -0.7 | 0.8 | 10.8 | 13.9 | 20.5 | 8.9 | 3.4 | -4.4 | -9.5 |
| 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 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.4 |
| 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) | 4.3 | 6.0 | 8.2 | 8.7 | 9.1 | 8.2 | 8.9 | 11.3 | 8.0 | 8.1 | 4.7 | 3.7 |
| Precipitation (mm) | 150 | 117 | 101 | 156 | 150 | 163 | 271 | 119 | 209 | 177 | 270 | 148 |
| Sunny days | 0 | 2 | 15 | 9 | 10 | 7 | 5 | 7 | 3 | 10 | 4 | 2 |
| Rainy days | 6 | 7 | 12 | 21 | 21 | 23 | 26 | 24 | 27 | 21 | 22 | 14 |
| Snow days | 25 | 19 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 15 |
The best time to visit Hachimantai during the most sunny months:
The largest precipitation sum in Hachimantai is at