Climate averages 1991–2020
Koblenz weather
in May.
A mild, moderately wet month: the 5th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Koblenz: daytime highs average 18.4°C and nights cool to about 9.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 60 mm of rain on roughly 11 days, which makes May a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 26 min on an average May day.
The nearest other city in this atlas is Bonn (54 km away). In May its highs average 18.3°C, about as warm as Koblenz, with 61 mm of rain.
Among the 120 cities listed in Germany, Koblenz ranks joint 28th of 120 for the warmest May highs and joint 28th of 120 for the driest May (rainfall, lowest first). The mean May high of those 120 cities is 17.9°C; Koblenz is 0.5°C warmer than that mean.
From May to June, average highs rise by 3.2°C to 21.5°C, and monthly rainfall falls from 60 mm to 59 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Bonn in MayGermany · 54 kmHigh 18.3°C · Low 9.3°C · 61 mm rain
- Wiesbaden in MayGermany · 56 kmHigh 18.7°C · Low 9.8°C · 62 mm rain
- Troisdorf in MayGermany · 59 kmHigh 18.1°C · Low 9.3°C · 64 mm rain
- Mainz in MayGermany · 65 kmHigh 18.8°C · Low 9.4°C · 62 mm rain
- Siegen in MayGermany · 66 kmHigh 16.9°C · Low 8.4°C · 72 mm rain
- Bergisch Gladbach in MayGermany · 77 kmHigh 18.0°C · Low 9.4°C · 69 mm rain
- Köln in MayGermany · 78 kmHigh 18.0°C · Low 9.1°C · 62 mm rain
- Gießen in MayGermany · 82 kmHigh 17.9°C · Low 8.9°C · 59 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.