Climate averages 1991–2020
Siegen weather
in May.
A mild, moderately wet month: the 5th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Siegen: daytime highs average 16.9°C and nights cool to about 8.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 72 mm of rain on roughly 13 days, which makes May a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 30 min on an average May day.
The nearest other city in this atlas is Lüdenscheid (47 km away). In May its highs average 15.8°C, 1.1°C cooler than Siegen, with 82 mm of rain.
Among the 120 cities listed in Germany, Siegen ranks 107th of 120 for the warmest May highs and joint 86th of 120 for the driest May (rainfall, lowest first). The mean May high of those 120 cities is 17.9°C; Siegen is 0.9°C cooler than that mean.
From May to June, average highs rise by 3.0°C to 19.9°C, and monthly rainfall rises from 72 mm to 76 mm.
The annual picture
May 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
Siegen climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.2°C-1.4°C | -1.4°C | 100 | 14.6 | 8.58 h |
| February | 4.3°C-1.6°C | -1.6°C | 79 | 12.1 | 10.010 h |
| March | 8.3°C1.0°C | 1.0°C | 82 | 13.7 | 11.812 h |
| April | 13.1°C4.4°C | 4.4°C | 62 | 11.7 | 13.814 h |
| May, selected | 16.9°C8.4°C | 8.4°C | 72 | 12.6 | 15.515 h |
| June | 19.9°C11.5°C | 11.5°C | 76 | 12.8 | 16.416 h |
| July | 21.9°C13.7°C | 13.7°C | 83 | 14.2 | 16.016 h |
| August | 21.6°C13.5°C | 13.5°C | 81 | 13.0 | 14.615 h |
| September | 17.6°C10.4°C | 10.4°C | 76 | 11.6 | 12.713 h |
| October | 12.7°C6.8°C | 6.8°C | 80 | 12.9 | 10.811 h |
| November | 7.4°C3.0°C | 3.0°C | 85 | 13.4 | 9.09 h |
| December | 4.0°C0.0°C | 0.0°C | 109 | 15.8 | 8.08 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
May in nearby cities
- Lüdenscheid in MayGermany · 47 kmHigh 15.8°C · Low 7.7°C · 82 mm rain
- Marburg an der Lahn in MayGermany · 53 kmHigh 17.4°C · Low 8.3°C · 58 mm rain
- Gießen in MayGermany · 56 kmHigh 17.9°C · Low 8.9°C · 59 mm rain
- Arnsberg in MayGermany · 57 kmHigh 16.3°C · Low 8.0°C · 68 mm rain
- Iserlohn in MayGermany · 60 kmHigh 16.5°C · Low 8.3°C · 67 mm rain
- Troisdorf in MayGermany · 62 kmHigh 18.1°C · Low 9.3°C · 64 mm rain
- Bergisch Gladbach in MayGermany · 64 kmHigh 18.0°C · Low 9.4°C · 69 mm rain
- Koblenz in MayGermany · 66 kmHigh 18.4°C · Low 9.3°C · 60 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 Siegen) is explained once on the Siegen year overview and on the Sources, method and limits page.