Climate averages 1991–2020
Heilbronn weather
in January.
A cold, moderately wet month: the coolest and the joint 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Heilbronn: daytime highs average 4.8°C and nights cool to about -0.8°C. By daytime temperature it is the coolest month of the year.
Expect about 76 mm of rain on roughly 12 days, which makes January a moderately wet month (the joint 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 43 min on an average January day.
The nearest other city in this atlas is Ludwigsburg (27 km away). In January its highs average 4.3°C, about as warm as Heilbronn, with 69 mm of rain.
Among the 120 cities listed in Germany, Heilbronn ranks joint 36th of 120 for the warmest January highs and joint 83rd of 120 for the driest January (rainfall, lowest first). The mean January high of those 120 cities is 4.2°C; Heilbronn is 0.6°C warmer than that mean.
From January to February, average highs rise by 1.6°C to 6.4°C, and monthly rainfall falls from 76 mm to 67 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Ludwigsburg in JanuaryGermany · 27 kmHigh 4.3°C · Low -1.7°C · 69 mm rain
- Stuttgart in JanuaryGermany · 40 kmHigh 4.9°C · Low -1.3°C · 65 mm rain
- Esslingen in JanuaryGermany · 45 kmHigh 4.9°C · Low -1.4°C · 65 mm rain
- Pforzheim in JanuaryGermany · 47 kmHigh 5.0°C · Low -0.8°C · 68 mm rain
- Heidelberg, Germany in JanuaryGermany · 49 kmHigh 5.0°C · Low -0.4°C · 80 mm rain
- Karlsruhe in JanuaryGermany · 61 kmHigh 5.2°C · Low -0.3°C · 68 mm rain
- Mannheim in JanuaryGermany · 67 kmHigh 4.8°C · Low -0.6°C · 59 mm rain
- Ludwigshafen am Rhein in JanuaryGermany · 68 kmHigh 4.9°C · Low -0.6°C · 59 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.