Climate averages 1991–2020
Hamm 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 Hamm: daytime highs average 13.8°C and nights cool to about 4.9°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 48 mm of rain on roughly 11 days, which makes April a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 50 min on an average April day.
The nearest other city in this atlas is Lünen (21 km away). In April its highs average 14.1°C, about as warm as Hamm, with 57 mm of rain.
Among the 120 cities listed in Germany, Hamm ranks joint 77th of 120 for the warmest April highs and joint 37th of 120 for the driest April (rainfall, lowest first). The mean April high of those 120 cities is 14.0°C; Hamm is 0.1°C cooler than that mean.
From April to May, average highs rise by 3.8°C to 17.7°C, and monthly rainfall rises from 48 mm to 57 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
Hamm climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.7°C0.2°C | 0.2°C | 70 | 13.6 | 8.48 h |
| February | 5.9°C0.2°C | 0.2°C | 57 | 11.6 | 9.910 h |
| March | 9.5°C2.1°C | 2.1°C | 60 | 12.5 | 11.812 h |
| April, selected | 13.8°C4.9°C | 4.9°C | 48 | 10.6 | 13.814 h |
| May | 17.7°C8.9°C | 8.9°C | 57 | 11.4 | 15.616 h |
| June | 20.6°C12.1°C | 12.1°C | 63 | 11.2 | 16.617 h |
| July | 22.7°C14.4°C | 14.4°C | 72 | 12.9 | 16.216 h |
| August | 22.5°C14.3°C | 14.3°C | 75 | 12.2 | 14.615 h |
| September | 18.7°C11.3°C | 11.3°C | 63 | 11.0 | 12.713 h |
| October | 13.9°C7.9°C | 7.9°C | 65 | 11.8 | 10.711 h |
| November | 8.8°C4.0°C | 4.0°C | 66 | 12.8 | 8.99 h |
| December | 5.4°C1.2°C | 1.2°C | 73 | 13.4 | 7.98 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
- Lünen in AprilGermany · 21 kmHigh 14.1°C · Low 5.2°C · 57 mm rain
- Dortmund in AprilGermany · 31 kmHigh 13.9°C · Low 5.1°C · 57 mm rain
- Münster in AprilGermany · 34 kmHigh 14.1°C · Low 5.0°C · 48 mm rain
- Iserlohn in AprilGermany · 35 kmHigh 12.8°C · Low 4.4°C · 55 mm rain
- Arnsberg in AprilGermany · 38 kmHigh 12.6°C · Low 4.0°C · 56 mm rain
- Castrop-Rauxel in AprilGermany · 38 kmHigh 14.0°C · Low 5.1°C · 55 mm rain
- Witten in AprilGermany · 42 kmHigh 13.8°C · Low 5.3°C · 55 mm rain
- Hagen in AprilGermany · 43 kmHigh 13.8°C · Low 5.4°C · 70 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 Hamm) is explained once on the Hamm year overview and on the Sources, method and limits page.