Climate averages 1991–2020
Siegen weather
in December.
A cold, wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Siegen: daytime highs average 4.0°C and nights cool to about 0.0°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 109 mm of rain on roughly 16 days, which makes December a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 8 h 02 min on an average December day.
The nearest other city in this atlas is Lüdenscheid (47 km away). In December its highs average 3.8°C, about as warm as Siegen, with 106 mm of rain.
Among the 120 cities listed in Germany, Siegen ranks joint 101st of 120 for the warmest December highs and 116th of 120 for the driest December (rainfall, lowest first). The mean December high of those 120 cities is 4.9°C; Siegen is 0.9°C cooler than that mean.
From December to January, average highs fall by 0.8°C to 3.2°C, and monthly rainfall falls from 109 mm to 100 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Lüdenscheid in DecemberGermany · 47 kmHigh 3.8°C · Low -0.2°C · 106 mm rain
- Marburg an der Lahn in DecemberGermany · 53 kmHigh 4.0°C · Low -0.2°C · 66 mm rain
- Gießen in DecemberGermany · 56 kmHigh 4.5°C · Low 0.3°C · 67 mm rain
- Arnsberg in DecemberGermany · 57 kmHigh 4.2°C · Low 0.2°C · 81 mm rain
- Iserlohn in DecemberGermany · 60 kmHigh 4.4°C · Low 0.5°C · 85 mm rain
- Troisdorf in DecemberGermany · 62 kmHigh 5.8°C · Low 1.6°C · 90 mm rain
- Bergisch Gladbach in DecemberGermany · 64 kmHigh 5.6°C · Low 1.4°C · 119 mm rain
- Koblenz in DecemberGermany · 66 kmHigh 5.6°C · Low 1.3°C · 64 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.