- Heilbronn ›
- Weather by month
Heilbronn Weather by Month
Average temperatures, rainfall and humidity for Heilbronn, Germany, month by month, built from OpenWeather's historical records. Use it to see what a typical Heilbronn month looks like before you travel — then check the live Heilbronn forecast for the days ahead.
Warmest month
July
27°C average high
Coolest month
January
0°C average low
Wettest month
December
81 mm of rain
Driest month
February
47 mm of rain
Average temperature and rainfall in Heilbronn by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 5°C | 0°C | -13°C / 17°C | 80 mm | 83% | 11 km/h |
| February | 8°C | 1°C | -13°C / 20°C | 47 mm | 77% | 11 km/h |
| March | 12°C | 3°C | -11°C / 24°C | 51 mm | 71% | 11 km/h |
| April | 16°C | 6°C | -4°C / 29°C | 54 mm | 67% | 10 km/h |
| May | 20°C | 9°C | 1°C / 33°C | 67 mm | 70% | 9 km/h |
| June | 25°C | 14°C | 6°C / 41°C | 58 mm | 68% | 9 km/h |
| July | 27°C | 15°C | 7°C / 40°C | 76 mm | 66% | 9 km/h |
| August | 27°C | 15°C | 7°C / 39°C | 73 mm | 68% | 8 km/h |
| September | 21°C | 11°C | 3°C / 34°C | 60 mm | 75% | 8 km/h |
| October | 16°C | 8°C | -6°C / 29°C | 57 mm | 82% | 9 km/h |
| November | 9°C | 4°C | -7°C / 21°C | 68 mm | 85% | 9 km/h |
| December | 7°C | 2°C | -11°C / 20°C | 81 mm | 85% | 10 km/h |
Best time to visit Heilbronn
The most comfortable time to visit Heilbronn is generally June and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around December, totalling about 771 mm a year.
Travellers who prefer heat should aim for July, when highs average 27°C. December is the month to avoid if rain would spoil your plans — it averages 81 mm, roughly 2× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Heilbronn forecast for what is happening now.