Climate averages 1991–2020
Heilbronn weather
in April.
A mild, moderately wet month: the 6th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Heilbronn: daytime highs average 15.3°C and nights cool to about 5.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 52 mm of rain on roughly 10 days, which makes April a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 41 min on an average April day.
The nearest other city in this atlas is Ludwigsburg (27 km away). In April its highs average 14.6°C, 0.7°C cooler than Heilbronn, with 52 mm of rain.
Among the 120 cities listed in Germany, Heilbronn ranks 5th of 120 for the warmest April highs and joint 71st of 120 for the driest April (rainfall, lowest first). The mean April high of those 120 cities is 14.0°C; Heilbronn is 1.3°C warmer than that mean.
From April to May, average highs rise by 3.9°C to 19.2°C, and monthly rainfall rises from 52 mm to 79 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Ludwigsburg in AprilGermany · 27 kmHigh 14.6°C · Low 4.5°C · 52 mm rain
- Stuttgart in AprilGermany · 40 kmHigh 14.9°C · Low 4.6°C · 54 mm rain
- Esslingen in AprilGermany · 45 kmHigh 15.0°C · Low 4.6°C · 54 mm rain
- Pforzheim in AprilGermany · 47 kmHigh 15.0°C · Low 5.2°C · 54 mm rain
- Heidelberg, Germany in AprilGermany · 49 kmHigh 15.4°C · Low 5.5°C · 54 mm rain
- Karlsruhe in AprilGermany · 61 kmHigh 15.5°C · Low 5.7°C · 52 mm rain
- Mannheim in AprilGermany · 67 kmHigh 15.4°C · Low 5.5°C · 44 mm rain
- Ludwigshafen am Rhein in AprilGermany · 68 kmHigh 15.5°C · Low 5.5°C · 44 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.