Monthly climate guide
Koblenz weather in May
Expect mild weather in Koblenz in May: afternoons reach about 18°C (64°F), while nights drop to around 7°C (45°F). Around 67 mm of rain falls over the month (some rain), and skies are often cloudy. Daytime highs are 4°C warmer than April and 4°C cooler than June.
What stands out in May
- Seasonally, May counts as late spring in Koblenz.
- Evenings cool off sharply: the daily range is around 11°C, so pack a layer.
- It warms up quickly from here: by June highs are about 4°C higher.
- Just 80 km apart, but Koblenz runs about 2°C cooler than Frankfurt this month.
Avg high
18°C
64°F
Avg low
7°C
45°F
Rainfall
67 mm
some rain
Humidity
77%
relative
Sky
69%
cloud · often cloudy
Koblenz weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 4°C / 38°F | -2°C / 29°F | 75 mm | 94% | 83% |
| February | 5°C / 40°F | -2°C / 28°F | 52 mm | 91% | 75% |
| March | 9°C / 49°F | 0°C / 33°F | 48 mm | 85% | 68% |
| April | 14°C / 58°F | 4°C / 38°F | 42 mm | 79% | 65% |
| May | 18°C / 64°F | 7°C / 45°F | 67 mm | 77% | 69% |
| June | 22°C / 71°F | 11°C / 52°F | 77 mm | 73% | 71% |
| July | 24°C / 76°F | 13°C / 56°F | 72 mm | 67% | 68% |
| August | 25°C / 76°F | 13°C / 56°F | 70 mm | 67% | 66% |
| September | 20°C / 69°F | 9°C / 49°F | 55 mm | 73% | 64% |
| October | 14°C / 58°F | 6°C / 43°F | 63 mm | 85% | 72% |
| November | 8°C / 47°F | 2°C / 36°F | 60 mm | 92% | 77% |
| December | 5°C / 41°F | 0°C / 33°F | 84 mm | 95% | 83% |
What to pack for May
- A warm sweater or fleece for layering
- A mid-weight jacket
- A small travel umbrella, just in case
Is May a good time to visit Koblenz?
Compare the months in the chart above to find your ideal window.
Best time to visit Koblenz →Other Germany cities in May
Cite or embed this data
Writing about this destination? Copy a ready-made citation or embed a live widget — free, just keep the link.
Koblenz weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/germany/koblenz/may
<a href="https://weathercompare.eu/weather/germany/koblenz/may">Koblenz weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/germany/koblenz" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Koblenz weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/germany/koblenz/may">Koblenz weather in May</a> – WeatherCompare</p>
Koblenz in May: quick answers
Is May a good time to visit Koblenz?
Yes. May is one of the best months for Koblenz, with highs around 18°C and about 67 mm of rain.
How warm is Koblenz in May?
Average highs are about 18°C (64°F) and average lows about 7°C (45°F), based on 10 years of daily data.
Does it rain a lot in Koblenz in May?
Koblenz typically gets around 67 mm of rain in May — some rain.
Figures are long-term averages for the area around Koblenz (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.