Climate averages 1991–2020
Arnsberg weather
in January.
A cold, moderately wet month: the coolest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Arnsberg: daytime highs average 3.4°C and nights cool to about -1.1°C. By daytime temperature it is the coolest month of the year.
Expect about 79 mm of rain on roughly 14 days, which makes January a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 25 min on an average January day.
The nearest other city in this atlas is Iserlohn (26 km away). In January its highs average 3.7°C, about as warm as Arnsberg, with 81 mm of rain.
Among the 120 cities listed in Germany, Arnsberg ranks joint 98th of 120 for the warmest January highs and joint 93rd of 120 for the driest January (rainfall, lowest first). The mean January high of those 120 cities is 4.2°C; Arnsberg is 0.9°C cooler than that mean.
From January to February, average highs rise by 1.0°C to 4.3°C, and monthly rainfall falls from 79 mm to 65 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
Arnsberg climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 3.4°C-1.1°C | -1.1°C | 79 | 14.3 | 8.48 h |
| February | 4.3°C-1.3°C | -1.3°C | 65 | 12.5 | 9.910 h |
| March | 8.1°C1.0°C | 1.0°C | 70 | 13.7 | 11.812 h |
| April | 12.6°C4.0°C | 4.0°C | 56 | 11.3 | 13.814 h |
| May | 16.3°C8.0°C | 8.0°C | 68 | 12.8 | 15.616 h |
| June | 19.2°C11.1°C | 11.1°C | 74 | 13.0 | 16.517 h |
| July | 21.3°C13.3°C | 13.3°C | 85 | 14.2 | 16.116 h |
| August | 21.1°C13.3°C | 13.3°C | 84 | 13.3 | 14.615 h |
| September | 17.3°C10.3°C | 10.3°C | 70 | 12.3 | 12.713 h |
| October | 12.6°C7.0°C | 7.0°C | 70 | 12.6 | 10.711 h |
| November | 7.6°C3.2°C | 3.2°C | 72 | 13.5 | 8.99 h |
| December | 4.2°C0.2°C | 0.2°C | 81 | 14.7 | 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
January in nearby cities
- Iserlohn in JanuaryGermany · 26 kmHigh 3.7°C · Low -0.7°C · 81 mm rain
- Lüdenscheid in JanuaryGermany · 37 kmHigh 3.0°C · Low -1.5°C · 103 mm rain
- Hamm in JanuaryGermany · 38 kmHigh 4.7°C · Low 0.2°C · 70 mm rain
- Hagen in JanuaryGermany · 43 kmHigh 4.6°C · Low 0.3°C · 108 mm rain
- Dortmund in JanuaryGermany · 45 kmHigh 4.7°C · Low 0.1°C · 83 mm rain
- Lünen in JanuaryGermany · 46 kmHigh 5.0°C · Low 0.4°C · 83 mm rain
- Witten in JanuaryGermany · 51 kmHigh 4.6°C · Low 0.3°C · 83 mm rain
- Siegen in JanuaryGermany · 57 kmHigh 3.2°C · Low -1.4°C · 100 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 Arnsberg) is explained once on the Arnsberg year overview and on the Sources, method and limits page.