Early autumn · Weather & things to do
Koblenz in September
Koblenz cools off: highs slip to 70°F (21°C), from 78°F in August, with lows of 50°F (10°C) and about 2.3 in (58 mm) of rain.
At 87/100 for comfort (the top score of the year), it's one of the best months to visit.
- Avg high
- 70°F (21°C)
- Avg low
- 50°F (10°C)
- Rain
- 2.3 in (58 mm)
- Humidity
- 74%
- Cloud cover
- 64%
- Daylight
- ~12 h 21 min
- Comfort score
- 87/100 · Great
What September feels like
Highs settle around 70°F (21°C), warm enough for short sleeves most of the day.
Nights cool to an average low of 50°F (10°C).
Rain is moderate at about 2.3 in (58 mm) for the month.
Plan around September
September is one of Koblenz's best months on the climate data.
- Last warm month for a while: October highs fall to 59°F.
- Last of the best-scoring months: by October, the score drops to 75/100.
- Comfort improves from 83/100 in August to 87/100.
- Our Cologne, Koblenz & Rüdesheim route is planned for Late Nov – Dec 23, a window set by the holiday season rather than the weather — September falls outside it.
What to pack for September
- Light, breathable clotheshighs average 70°F
- Comfortable walking shoesmost picks involve some walking
What to do in Koblenz in September
September is good outdoor weather here, so these picks lean toward the open air.
Kurfürstliches Schloss
The last Elector of Trier's neoclassical palace from the 1780s, set on lawns along the Rhine promenade.
Why now September scores 87/100 for comfort, good conditions for being outside.
Liebfrauenkirche
Church with onion-domed twin towers on the highest point of the old town.
Festung Ehrenbreitstein
A 19th-century Prussian fortress on the cliff opposite the Deutsches Eck, with museums and a wide valley view.
Weinhaus Hubertus
Half-timbered wine tavern on the Florinsmarkt serving Moselle and Middle Rhine wines with regional dishes.
Nearby in September
- Rüdesheim in September~30 mi · highs 71°F, 2.0 in rain · similar daytime temperatures, about as wet
- Cologne in September~49 mi · highs 69°F, 2.2 in rain · similar daytime temperatures, about as wet
- Würzburg in September~111 mi · highs 70°F, 2.0 in rain · similar daytime temperatures, about as wet
- Strasbourg in September~123 mi · highs 71°F, 2.2 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~294 m to Koblenz's ~78 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Koblenz in September: quick answers
Is September a good time to visit Koblenz?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 70°F (21°C) and 2.3 in (58 mm) of rain.
How hot is Koblenz in September?
Average highs are 70°F (21°C) and average lows 50°F (10°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Koblenz in September?
Not much: about 2.3 in (58 mm) of rain falls across September on average, the 4th-driest month of the year. The annual total is about 30.9 in (786 mm).
What should I pack for Koblenz in September?
Bring light, breathable clothes (highs average 70°F) and comfortable walking shoes (most picks involve some walking).
Planning Koblenz in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.