Climate averages 1991–2020
Troisdorf weather
in January.
A cold, moderately wet month: the coolest and the joint 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Troisdorf: daytime highs average 5.2°C and nights cool to about 0.6°C. By daytime temperature it is the coolest month of the year.
Expect about 77 mm of rain on roughly 14 days, which makes January a moderately wet month (the joint 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 30 min on an average January day.
The nearest other city in this atlas is Bonn (9 km away). In January its highs average 5.4°C, about as warm as Troisdorf, with 63 mm of rain.
Among the 120 cities listed in Germany, Troisdorf ranks joint 11th of 120 for the warmest January highs and joint 85th of 120 for the driest January (rainfall, lowest first). The mean January high of those 120 cities is 4.2°C; Troisdorf is 1.0°C warmer than that mean.
From January to February, average highs rise by 1.3°C to 6.5°C, and monthly rainfall falls from 77 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
Troisdorf climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 5.2°C0.6°C | 0.6°C | 77 | 14.0 | 8.58 h |
| February | 6.5°C0.6°C | 0.6°C | 65 | 12.1 | 10.010 h |
| March | 10.1°C2.5°C | 2.5°C | 68 | 13.6 | 11.812 h |
| April | 14.4°C5.3°C | 5.3°C | 53 | 10.9 | 13.814 h |
| May | 18.1°C9.3°C | 9.3°C | 64 | 11.9 | 15.515 h |
| June | 21.1°C12.5°C | 12.5°C | 73 | 11.8 | 16.416 h |
| July | 23.2°C14.7°C | 14.7°C | 77 | 13.0 | 16.016 h |
| August | 23.0°C14.6°C | 14.6°C | 81 | 12.3 | 14.515 h |
| September | 19.2°C11.5°C | 11.5°C | 68 | 11.0 | 12.713 h |
| October | 14.4°C8.2°C | 8.2°C | 74 | 12.2 | 10.811 h |
| November | 9.2°C4.5°C | 4.5°C | 76 | 13.5 | 9.09 h |
| December | 5.8°C1.6°C | 1.6°C | 90 | 15.5 | 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
- Bonn in JanuaryGermany · 9 kmHigh 5.4°C · Low 0.7°C · 63 mm rain
- Bergisch Gladbach in JanuaryGermany · 20 kmHigh 4.9°C · Low 0.3°C · 109 mm rain
- Köln in JanuaryGermany · 20 kmHigh 5.2°C · Low 0.5°C · 90 mm rain
- Leverkusen in JanuaryGermany · 27 kmHigh 5.2°C · Low 0.6°C · 90 mm rain
- Solingen in JanuaryGermany · 41 kmHigh 4.3°C · Low -0.1°C · 98 mm rain
- Remscheid in JanuaryGermany · 41 kmHigh 3.5°C · Low -0.9°C · 104 mm rain
- Düren in JanuaryGermany · 46 kmHigh 5.0°C · Low 0.4°C · 62 mm rain
- Wuppertal in JanuaryGermany · 50 kmHigh 4.7°C · Low 0.2°C · 104 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 Troisdorf) is explained once on the Troisdorf year overview and on the Sources, method and limits page.