Climate averages 1991–2020
Heilbronn weather
in August.
A warm, moderately wet month: the 2nd warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Heilbronn: daytime highs average 24.6°C and nights cool to about 15.4°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 62 mm of rain on roughly 11 days, which makes August a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 24 min on an average August day.
The nearest other city in this atlas is Ludwigsburg (27 km away). In August its highs average 23.9°C, 0.8°C cooler than Heilbronn, with 67 mm of rain.
Among the 120 cities listed in Germany, Heilbronn ranks 6th of 120 for the warmest August highs and joint 22nd of 120 for the driest August (rainfall, lowest first). The mean August high of those 120 cities is 22.9°C; Heilbronn is 1.7°C warmer than that mean.
From August to September, average highs fall by 4.6°C to 20.0°C, and monthly rainfall rises from 62 mm to 63 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Heilbronn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.8°C-0.8°C | -0.8°C | 76 | 12.3 | 8.79 h |
| February | 6.4°C-0.7°C | -0.7°C | 67 | 11.4 | 10.110 h |
| March | 10.7°C2.1°C | 2.1°C | 76 | 12.5 | 11.912 h |
| April | 15.3°C5.5°C | 5.5°C | 52 | 10.4 | 13.714 h |
| May | 19.2°C9.8°C | 9.8°C | 79 | 13.1 | 15.315 h |
| June | 22.5°C13.4°C | 13.4°C | 66 | 12.2 | 16.116 h |
| July | 24.7°C15.5°C | 15.5°C | 74 | 12.7 | 15.816 h |
| August, selected | 24.6°C15.4°C | 15.4°C | 62 | 11.0 | 14.414 h |
| September | 20.0°C11.6°C | 11.6°C | 63 | 10.2 | 12.713 h |
| October | 14.9°C7.6°C | 7.6°C | 72 | 11.8 | 10.811 h |
| November | 9.0°C3.3°C | 3.3°C | 72 | 11.6 | 9.29 h |
| December | 5.4°C0.4°C | 0.4°C | 90 | 14.6 | 8.38 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Ludwigsburg in AugustGermany · 27 kmHigh 23.9°C · Low 14.4°C · 67 mm rain
- Stuttgart in AugustGermany · 40 kmHigh 24.1°C · Low 14.5°C · 68 mm rain
- Esslingen in AugustGermany · 45 kmHigh 24.2°C · Low 14.6°C · 68 mm rain
- Pforzheim in AugustGermany · 47 kmHigh 24.2°C · Low 15.1°C · 71 mm rain
- Heidelberg, Germany in AugustGermany · 49 kmHigh 24.9°C · Low 15.5°C · 60 mm rain
- Karlsruhe in AugustGermany · 61 kmHigh 25.1°C · Low 15.8°C · 62 mm rain
- Mannheim in AugustGermany · 67 kmHigh 25.0°C · Low 15.6°C · 53 mm rain
- Ludwigshafen am Rhein in AugustGermany · 68 kmHigh 25.2°C · Low 15.7°C · 53 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Heilbronn) is explained once on the Heilbronn year overview and on the Sources, method and limits page.