Average annual temperature is 14.8 °C
Absolute maximum temperature: 37.2 °C
Absolute minimum temperature: -7.0 °C
Number of sunny days: 107 days
Number of rainy days: 247 days
Number of snow days: 11 days
Look at detailed online map of Niichō
* Weather data for Niichō 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) | 14.5 | 14.5 | 22.9 | 25.3 | 30.1 | 30.7 | 35.3 | 37.2 | 35.8 | 24.7 | 24.9 | 17.4 |
| Average daytime temperature (°C) | 6.3 | 6.7 | 14.8 | 17.7 | 21.9 | 25.7 | 30.7 | 33.8 | 30.3 | 20.2 | 15.7 | 9.8 |
| Average temperature (°C) | 2.4 | 2.7 | 9.2 | 12.4 | 16.8 | 21.2 | 26.1 | 28.7 | 25.2 | 15.0 | 11.1 | 5.8 |
| Average night temperature (°C) | -0.8 | -1.3 | 4.2 | 7.7 | 12.2 | 17.3 | 22.1 | 25.1 | 21.3 | 10.6 | 7.5 | 2.5 |
| Absolute minimum temperature (°C) | -6.6 | -7.0 | -2.5 | 1.6 | 2.8 | 11.1 | 16.6 | 21.7 | 13.8 | 5.0 | -1.1 | -4.5 |
| 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 | 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 | 14.3 | 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) | 5.1 | 6.2 | 7.7 | 7.9 | 9.2 | 7.7 | 9.3 | 10.6 | 8.8 | 8.3 | 6.3 | 4.5 |
| Precipitation (mm) | 152 | 109 | 160 | 255 | 285 | 420 | 333 | 131 | 174 | 180 | 232 | 250 |
| Sunny days | 4 | 7 | 16 | 12 | 14 | 8 | 8 | 7 | 5 | 13 | 7 | 6 |
| Rainy days | 21 | 17 | 15 | 18 | 17 | 22 | 23 | 24 | 25 | 18 | 23 | 24 |
| Snow days | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Niichō during the most sunny months:
The largest precipitation sum in Niichō is at