Average annual temperature is 15.6 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -6.8 °C
Number of sunny days: 145 days
Number of rainy days: 217 days
Number of snow days: 3 days
Look at detailed online map of Ōmihachiman
* Weather data for Ōmihachiman 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 | 14.6 | 21.9 | 24.6 | 29.4 | 30.0 | 34.4 | 34.4 | 33.1 | 25.1 | 24.8 | 17.9 |
| Average daytime temperature (°C) | 7.8 | 9.0 | 15.2 | 18.3 | 22.2 | 25.4 | 30.9 | 31.8 | 30.2 | 21.2 | 16.5 | 11.6 |
| Average temperature (°C) | 3.7 | 4.9 | 9.9 | 13.3 | 17.5 | 21.7 | 26.7 | 27.9 | 25.7 | 16.7 | 11.8 | 6.9 |
| Average night temperature (°C) | 0.2 | 1.4 | 5.2 | 8.8 | 13.4 | 18.3 | 22.8 | 24.6 | 22.0 | 12.7 | 8.0 | 3.1 |
| Absolute minimum temperature (°C) | -6.8 | -2.9 | -1.0 | 3.2 | 6.7 | 11.5 | 19.7 | 23.1 | 17.5 | 7.6 | 2.2 | -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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 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) | 6.8 | 6.1 | 8.5 | 7.8 | 9.3 | 6.8 | 9.9 | 10.0 | 9.8 | 8.7 | 7.3 | 7.0 |
| Precipitation (mm) | 63 | 60 | 118 | 167 | 209 | 303 | 129 | 191 | 75 | 67 | 86 | 52 |
| Sunny days | 6 | 11 | 16 | 17 | 17 | 9 | 13 | 5 | 9 | 15 | 14 | 13 |
| Rainy days | 23 | 16 | 15 | 13 | 14 | 21 | 18 | 26 | 21 | 16 | 16 | 18 |
| Snow days | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ōmihachiman is at