Average annual temperature is 16.7 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: -6.0 °C
Number of sunny days: 162 days
Number of rainy days: 200 days
Number of snow days: 3 days
Look at detailed online map of Hachijō
* Weather data for Hachijō 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) | 13.9 | 17.7 | 24.7 | 25.2 | 32.1 | 31.8 | 39.0 | 37.6 | 36.1 | 28.2 | 25.2 | 19.8 |
| Average daytime temperature (°C) | 9.0 | 11.2 | 17.1 | 20.4 | 23.0 | 27.0 | 33.7 | 33.6 | 30.4 | 22.7 | 18.3 | 13.5 |
| Average temperature (°C) | 4.0 | 5.8 | 12.0 | 15.3 | 18.1 | 22.7 | 28.3 | 28.9 | 26.2 | 17.6 | 12.9 | 7.8 |
| Average night temperature (°C) | 0.0 | 1.2 | 7.4 | 10.9 | 14.0 | 19.2 | 24.1 | 25.5 | 23.1 | 13.3 | 8.6 | 3.2 |
| Absolute minimum temperature (°C) | -6.0 | -4.0 | 0.6 | 3.7 | 7.1 | 13.5 | 21.3 | 23.9 | 16.6 | 8.8 | 3.4 | -2.0 |
| 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 | 14.5 | 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) | 7.3 | 7.8 | 7.6 | 8.8 | 8.7 | 7.5 | 10.7 | 11.3 | 9.0 | 8.5 | 7.1 | 7.7 |
| Precipitation (mm) | 30 | 48 | 133 | 98 | 158 | 297 | 41 | 113 | 245 | 108 | 71 | 35 |
| Sunny days | 17 | 16 | 15 | 17 | 14 | 7 | 16 | 5 | 5 | 14 | 15 | 21 |
| Rainy days | 12 | 11 | 16 | 13 | 17 | 23 | 15 | 26 | 25 | 17 | 15 | 10 |
| Snow days | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Hachijō during the most sunny months:
The largest precipitation sum in Hachijō is at