Climate averages 1991–2020
Köln weather
in August.
A warm, moderately wet month: the 2nd warmest and the joint 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Köln: daytime highs average 22.9°C and nights cool to about 14.4°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 80 mm of rain on roughly 12 days, which makes August a moderately wet month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 34 min on an average August day.
The nearest other city in this atlas is Leverkusen (11 km away). In August its highs average 23.1°C, about as warm as Köln, with 80 mm of rain.
Among the 120 cities listed in Germany, Köln ranks joint 53rd of 120 for the warmest August highs and joint 79th of 120 for the driest August (rainfall, lowest first). The mean August high of those 120 cities is 22.9°C; Köln is level with that mean.
From August to September, average highs fall by 3.8°C to 19.1°C, and monthly rainfall falls from 80 mm to 71 mm.
The annual picture
August 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
Köln climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.2°C0.5°C | 0.5°C | 90 | 14.8 | 8.58 h |
| February | 6.4°C0.5°C | 0.5°C | 74 | 12.8 | 10.010 h |
| March | 10.0°C2.3°C | 2.3°C | 73 | 13.7 | 11.812 h |
| April | 14.2°C5.1°C | 5.1°C | 52 | 10.8 | 13.814 h |
| May | 18.0°C9.1°C | 9.1°C | 62 | 11.9 | 15.516 h |
| June | 20.9°C12.3°C | 12.3°C | 70 | 12.2 | 16.416 h |
| July | 23.0°C14.6°C | 14.6°C | 80 | 13.1 | 16.016 h |
| August, selected | 22.9°C14.4°C | 14.4°C | 80 | 11.9 | 14.615 h |
| September | 19.1°C11.4°C | 11.4°C | 71 | 11.3 | 12.713 h |
| October | 14.3°C8.1°C | 8.1°C | 83 | 12.8 | 10.811 h |
| November | 9.1°C4.3°C | 4.3°C | 85 | 14.2 | 9.09 h |
| December | 5.8°C1.5°C | 1.5°C | 101 | 16.0 | 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
August in nearby cities
- Leverkusen in AugustGermany · 11 kmHigh 23.1°C · Low 14.8°C · 80 mm rain
- Bergisch Gladbach in AugustGermany · 14 kmHigh 22.8°C · Low 14.6°C · 87 mm rain
- Troisdorf in AugustGermany · 20 kmHigh 23.0°C · Low 14.6°C · 81 mm rain
- Bonn in AugustGermany · 24 kmHigh 23.2°C · Low 14.6°C · 78 mm rain
- Solingen in AugustGermany · 28 kmHigh 21.7°C · Low 13.9°C · 94 mm rain
- Remscheid in AugustGermany · 32 kmHigh 21.0°C · Low 13.2°C · 99 mm rain
- Düsseldorf in AugustGermany · 34 kmHigh 23.0°C · Low 14.6°C · 83 mm rain
- Neuss in AugustGermany · 35 kmHigh 23.0°C · Low 14.6°C · 83 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 Köln) is explained once on the Köln year overview and on the Sources, method and limits page.
Leverkusen lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.