Average annual temperature is 21.2 °C
Absolute maximum temperature: 38.3 °C
Absolute minimum temperature: -0.3 °C
Number of sunny days: 150 days
Number of rainy days: 215 days
Look at detailed online map of Heilbronn
* Weather data for Heilbronn United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 28.1 | 29.4 | 30.5 | 32.4 | 33.7 | 36.2 | 37.2 | 38.3 | 34.6 | 29.7 | 29.0 | 26.0 |
| Average daytime temperature (°C) | 20.9 | 24.7 | 25.3 | 28.0 | 28.8 | 31.5 | 34.3 | 34.1 | 31.3 | 26.6 | 22.2 | 19.2 |
| Average temperature (°C) | 14.5 | 17.9 | 18.8 | 21.5 | 22.8 | 25.4 | 27.9 | 28.1 | 25.2 | 21.1 | 16.8 | 14.2 |
| Average night temperature (°C) | 9.6 | 13.3 | 14.1 | 16.7 | 18.1 | 21.2 | 23.7 | 24.0 | 21.2 | 16.8 | 13.0 | 10.6 |
| Absolute minimum temperature (°C) | -0.3 | 3.9 | 3.8 | 9.9 | 12.6 | 17.5 | 21.3 | 22.3 | 17.1 | 8.9 | 2.5 | 2.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.5 | 11.1 | 12.0 | 12.9 | 13.7 | 14.0 | 13.9 | 13.2 | 12.3 | 11.4 | 10.7 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.3 | 8.8 | 9.3 | 9.8 | 10.9 | 10.7 | 11.3 | 11.3 | 10.3 | 9.4 | 6.7 | 6.8 |
| Precipitation (mm) | 42 | 39 | 75 | 86 | 106 | 153 | 131 | 144 | 112 | 50 | 64 | 104 |
| Sunny days | 16 | 21 | 16 | 11 | 12 | 2 | 5 | 4 | 10 | 19 | 18 | 16 |
| Rainy days | 15 | 7 | 15 | 19 | 19 | 28 | 26 | 27 | 20 | 12 | 12 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Heilbronn is at