Average annual temperature is 14.5 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -12.5 °C
Number of sunny days: 136 days
Number of rainy days: 223 days
Number of snow days: 6 days
Look at detailed online map of Ōishi-ryūmon
* Weather data for Ōishi-ryūmon 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) | 14.7 | 14.4 | 21.5 | 23.4 | 27.1 | 28.7 | 33.7 | 34.4 | 31.4 | 23.6 | 24.1 | 18.6 |
| Average daytime temperature (°C) | 6.6 | 7.5 | 14.6 | 17.7 | 21.3 | 24.3 | 29.9 | 30.9 | 28.6 | 19.8 | 15.1 | 10.0 |
| Average temperature (°C) | 2.2 | 3.6 | 9.4 | 12.6 | 16.7 | 20.6 | 25.6 | 26.7 | 24.2 | 15.2 | 10.8 | 5.6 |
| Average night temperature (°C) | -1.4 | 0.4 | 5.3 | 8.4 | 12.9 | 17.5 | 22.0 | 23.5 | 20.8 | 11.3 | 7.0 | 1.9 |
| Absolute minimum temperature (°C) | -12.5 | -3.0 | -1.5 | 2.4 | 5.3 | 12.1 | 18.6 | 22.1 | 16.6 | 6.4 | 0.8 | -4.4 |
| 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 | 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 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.0 | 6.0 | 8.4 | 7.9 | 9.4 | 6.6 | 10.0 | 9.9 | 9.8 | 8.7 | 7.4 | 7.0 |
| Precipitation (mm) | 53 | 47 | 115 | 175 | 232 | 347 | 128 | 198 | 86 | 61 | 104 | 52 |
| Sunny days | 8 | 11 | 17 | 13 | 13 | 8 | 8 | 3 | 8 | 13 | 16 | 18 |
| Rainy days | 20 | 14 | 14 | 17 | 18 | 22 | 23 | 28 | 22 | 18 | 14 | 13 |
| Snow days | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ōishi-ryūmon is at