Average annual temperature is 11.5 °C
Absolute maximum temperature: 34.8 °C
Absolute minimum temperature: -16.3 °C
Number of sunny days: 107 days
Number of rainy days: 218 days
Number of snow days: 40 days
Look at detailed online map of Katasu
* Weather data for Katasu 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) | 13.1 | 9.5 | 19.0 | 22.7 | 28.5 | 29.8 | 34.8 | 34.4 | 32.6 | 25.0 | 22.7 | 14.9 |
| Average daytime temperature (°C) | 2.6 | 2.6 | 11.4 | 16.0 | 19.2 | 23.1 | 28.3 | 30.6 | 25.6 | 18.2 | 13.1 | 6.2 |
| Average temperature (°C) | -1.9 | -2.4 | 5.0 | 10.0 | 13.6 | 18.9 | 23.8 | 26.1 | 21.4 | 12.7 | 7.8 | 1.6 |
| Average night temperature (°C) | -5.7 | -7.6 | -0.9 | 4.7 | 8.6 | 15.5 | 20.1 | 22.8 | 18.2 | 8.4 | 3.8 | -1.9 |
| Absolute minimum temperature (°C) | -16.3 | -15.9 | -12.4 | -3.6 | -0.5 | 8.7 | 15.8 | 19.5 | 9.6 | 1.5 | -4.9 | -6.4 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 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) | 6.6 | 7.5 | 8.8 | 9.2 | 8.3 | 7.9 | 9.2 | 10.6 | 7.1 | 8.4 | 6.3 | 5.9 |
| Precipitation (mm) | 42 | 70 | 91 | 96 | 141 | 184 | 178 | 199 | 167 | 89 | 97 | 77 |
| Sunny days | 11 | 9 | 18 | 15 | 8 | 7 | 2 | 6 | 5 | 8 | 10 | 8 |
| Rainy days | 6 | 7 | 12 | 15 | 23 | 23 | 29 | 25 | 25 | 23 | 17 | 13 |
| Snow days | 14 | 12 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 10 |
The best time to visit Katasu during the most sunny months:
The largest precipitation sum in Katasu is at