Average annual temperature is 16.3 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -4.5 °C
Number of sunny days: 157 days
Number of rainy days: 207 days
Number of snow days: 1 day
Look at detailed online map of Kōgawa
* Weather data for Kōgawa 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) | 16.9 | 16.4 | 23.5 | 24.8 | 27.4 | 30.6 | 33.9 | 34.5 | 32.5 | 27.5 | 24.5 | 19.8 |
| Average daytime temperature (°C) | 9.7 | 10.9 | 17.2 | 19.4 | 22.8 | 26.1 | 30.4 | 30.6 | 29.4 | 22.5 | 17.6 | 12.8 |
| Average temperature (°C) | 5.3 | 6.1 | 12.0 | 14.8 | 18.4 | 22.2 | 26.2 | 26.7 | 25.0 | 17.3 | 12.7 | 8.3 |
| Average night temperature (°C) | 1.8 | 2.0 | 7.9 | 10.8 | 15.0 | 19.3 | 23.1 | 24.1 | 21.9 | 13.5 | 8.8 | 4.6 |
| Absolute minimum temperature (°C) | -4.5 | -2.7 | -0.1 | 5.7 | 8.5 | 14.3 | 19.7 | 22.2 | 19.5 | 8.2 | 1.0 | -0.4 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| 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) | 7.8 | 7.6 | 8.4 | 8.4 | 9.0 | 6.9 | 10.2 | 9.4 | 9.6 | 8.8 | 7.9 | 7.5 |
| Precipitation (mm) | 103 | 48 | 144 | 281 | 307 | 584 | 202 | 302 | 166 | 119 | 135 | 105 |
| Sunny days | 20 | 17 | 16 | 12 | 11 | 10 | 7 | 1 | 8 | 19 | 18 | 18 |
| Rainy days | 10 | 11 | 15 | 18 | 20 | 20 | 24 | 30 | 22 | 12 | 12 | 13 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Kōgawa is at