Average annual temperature is 11.5 °C
Absolute maximum temperature: 33.4 °C
Absolute minimum temperature: -15.1 °C
Number of sunny days: 104 days
Number of rainy days: 212 days
Number of snow days: 49 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) | 9.1 | 7.9 | 18.2 | 20.9 | 26.6 | 27.5 | 33.2 | 33.4 | 32.5 | 22.1 | 21.1 | 12.4 |
| Average daytime temperature (°C) | 1.3 | 1.9 | 10.8 | 14.8 | 18.8 | 23.1 | 27.5 | 31.2 | 25.8 | 17.4 | 11.5 | 4.9 |
| Average temperature (°C) | -2.4 | -1.6 | 5.3 | 9.7 | 13.6 | 18.9 | 23.4 | 26.6 | 21.5 | 12.6 | 7.8 | 1.6 |
| Average night temperature (°C) | -6.1 | -5.2 | 0.8 | 5.7 | 9.5 | 15.8 | 20.3 | 23.5 | 18.5 | 9.1 | 4.9 | -1.4 |
| Absolute minimum temperature (°C) | -15.1 | -12.5 | -10.5 | -0.5 | -0.6 | 10.5 | 14.4 | 21.2 | 10.6 | 3.4 | -4.5 | -7.9 |
| 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 | 11.2 | 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) | 5.5 | 6.7 | 8.4 | 8.8 | 8.8 | 8.0 | 9.1 | 10.9 | 7.4 | 8.1 | 5.3 | 4.7 |
| Precipitation (mm) | 79 | 71 | 86 | 116 | 117 | 129 | 142 | 51 | 143 | 95 | 154 | 111 |
| Sunny days | 5 | 5 | 18 | 13 | 10 | 6 | 7 | 8 | 3 | 12 | 9 | 8 |
| Rainy days | 6 | 7 | 12 | 17 | 21 | 24 | 24 | 23 | 27 | 19 | 19 | 13 |
| Snow days | 20 | 16 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 10 |
The best time to visit Hachimantai during the most sunny months:
The largest precipitation sum in Hachimantai is at