Climate averages 1991–2020
Aachen weather
in April.
A cool, moderately wet month: the 7th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Aachen: daytime highs average 13.5°C and nights cool to about 4.9°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 55 mm of rain on roughly 12 days, which makes April a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 47 min on an average April day.
The nearest other city in this atlas is Heerlen (14 km away). In April its highs average 13.9°C, about as warm as Aachen, with 44 mm of rain.
Among the 120 cities listed in Germany, Aachen ranks joint 96th of 120 for the warmest April highs and joint 91st of 120 for the driest April (rainfall, lowest first). The mean April high of those 120 cities is 14.0°C; Aachen is 0.4°C cooler than that mean.
From April to May, average highs rise by 3.7°C to 17.2°C, and monthly rainfall rises from 55 mm to 66 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
Aachen climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.9°C0.4°C | 0.4°C | 74 | 13.8 | 8.59 h |
| February | 6.0°C0.4°C | 0.4°C | 68 | 12.6 | 10.010 h |
| March | 9.5°C2.3°C | 2.3°C | 70 | 13.7 | 11.812 h |
| April, selected | 13.5°C4.9°C | 4.9°C | 55 | 11.6 | 13.814 h |
| May | 17.2°C8.8°C | 8.8°C | 66 | 12.9 | 15.515 h |
| June | 20.1°C11.8°C | 11.8°C | 76 | 13.1 | 16.416 h |
| July | 22.1°C14.1°C | 14.1°C | 83 | 13.7 | 16.016 h |
| August | 22.0°C14.0°C | 14.0°C | 79 | 12.9 | 14.515 h |
| September | 18.4°C11.2°C | 11.2°C | 66 | 10.9 | 12.713 h |
| October | 13.9°C8.1°C | 8.1°C | 65 | 11.8 | 10.811 h |
| November | 8.9°C4.3°C | 4.3°C | 69 | 13.1 | 9.09 h |
| December | 5.6°C1.5°C | 1.5°C | 85 | 14.5 | 8.18 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
- Heerlen in AprilThe Netherlands · 14 kmHigh 13.9°C · Low 5.1°C · 44 mm rain
- Maastricht in AprilThe Netherlands · 29 kmHigh 14.2°C · Low 5.3°C · 54 mm rain
- Düren in AprilGermany · 29 kmHigh 13.8°C · Low 4.9°C · 50 mm rain
- Liège in AprilBelgium · 40 kmHigh 14.2°C · Low 5.5°C · 52 mm rain
- Mönchengladbach in AprilGermany · 52 kmHigh 14.3°C · Low 5.4°C · 49 mm rain
- Hasselt in AprilBelgium · 55 kmHigh 14.4°C · Low 5.4°C · 48 mm rain
- Viersen in AprilGermany · 57 kmHigh 14.3°C · Low 5.5°C · 49 mm rain
- Neuss in AprilGermany · 63 kmHigh 14.5°C · Low 5.4°C · 52 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 Aachen) is explained once on the Aachen year overview and on the Sources, method and limits page.