Climate averages 1991–2020
Koblenz weather
in August.
A warm, moderately wet month: the 2nd warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Koblenz: daytime highs average 23.5°C and nights cool to about 14.7°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 59 mm of rain on roughly 11 days, which makes August a moderately wet month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 30 min on an average August day.
The nearest other city in this atlas is Bonn (54 km away). In August its highs average 23.2°C, about as warm as Koblenz, with 78 mm of rain.
Among the 120 cities listed in Germany, Koblenz ranks joint 36th of 120 for the warmest August highs and joint 12th of 120 for the driest August (rainfall, lowest first). The mean August high of those 120 cities is 22.9°C; Koblenz is 0.6°C warmer than that mean.
From August to September, average highs fall by 4.1°C to 19.4°C, and monthly rainfall falls from 59 mm to 55 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
Koblenz climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.9°C0.3°C | 0.3°C | 51 | 11.5 | 8.69 h |
| February | 6.3°C0.1°C | 0.1°C | 44 | 10.3 | 10.010 h |
| March | 10.2°C2.2°C | 2.2°C | 52 | 11.8 | 11.812 h |
| April | 14.6°C5.2°C | 5.2°C | 46 | 10.4 | 13.814 h |
| May | 18.4°C9.3°C | 9.3°C | 60 | 11.1 | 15.415 h |
| June | 21.5°C12.6°C | 12.6°C | 59 | 11.1 | 16.316 h |
| July | 23.6°C14.9°C | 14.9°C | 62 | 11.9 | 16.016 h |
| August, selected | 23.5°C14.7°C | 14.7°C | 59 | 10.8 | 14.515 h |
| September | 19.4°C11.4°C | 11.4°C | 55 | 9.5 | 12.713 h |
| October | 14.3°C7.9°C | 7.9°C | 54 | 11.2 | 10.811 h |
| November | 8.9°C4.2°C | 4.2°C | 55 | 11.7 | 9.19 h |
| December | 5.6°C1.3°C | 1.3°C | 64 | 13.3 | 8.18 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
- Bonn in AugustGermany · 54 kmHigh 23.2°C · Low 14.6°C · 78 mm rain
- Wiesbaden in AugustGermany · 56 kmHigh 24.2°C · Low 15.2°C · 58 mm rain
- Troisdorf in AugustGermany · 59 kmHigh 23.0°C · Low 14.6°C · 81 mm rain
- Mainz in AugustGermany · 65 kmHigh 24.5°C · Low 15.0°C · 58 mm rain
- Siegen in AugustGermany · 66 kmHigh 21.6°C · Low 13.5°C · 81 mm rain
- Bergisch Gladbach in AugustGermany · 77 kmHigh 22.8°C · Low 14.6°C · 87 mm rain
- Köln in AugustGermany · 78 kmHigh 22.9°C · Low 14.4°C · 80 mm rain
- Gießen in AugustGermany · 82 kmHigh 23.2°C · Low 14.2°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 Koblenz) is explained once on the Koblenz year overview and on the Sources, method and limits page.