Early autumn · Weather & things to do
Cologne in September
Cologne cools off: highs slip to 69°F (21°C), from 76°F in August, with lows of 50°F (10°C) and about 2.2 in (57 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
- 69°F (21°C)
- Avg low
- 50°F (10°C)
- Rain
- 2.2 in (57 mm)
- Humidity
- 74%
- Cloud cover
- 64%
- Daylight
- ~12 h 22 min
- Comfort score
- 87/100 · Great
What September feels like
Expect mild afternoons around 69°F (21°C), good for long walks.
Nights cool to an average low of 50°F (10°C).
Rain is moderate at about 2.2 in (57 mm) for the month.
Plan around September
September is one of Cologne's best months on the climate data.
- 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
- A warm layer for eveningsnights drop to 50°F
- Comfortable walking shoesmost picks involve some walking
What to do in Cologne in September
With conditions on your side, the picks below favor time outside.
Heinzels Wintermärchen
Old-town market on the Alter Markt and Heumarkt themed on Cologne's Heinzelmännchen, with an ice rink on the Heumarkt.
Markt der Engel
The angels' market on Neumarkt: white stalls under trees hung with thousands of star lights.
Weihnachtsmarkt am Kölner Dom
Red-roofed stalls on the Roncalliplatz under a canopy of lights, directly below the cathedral's west front.
Schokoladenmuseum
Chocolate museum on a Rhine peninsula, with a working production line and a three-metre chocolate fountain.
Früh am Dom
Big traditional brewhouse beside the cathedral pouring Früh Kölsch, with hearty Rhineland plates.
Nearby in September
- Koblenz in September~49 mi · highs 70°F, 2.3 in rain · similar daytime temperatures, about as wet
- Rüdesheim in September~79 mi · highs 71°F, 2.0 in rain · similar daytime temperatures, about as wet
- Brussels in September~114 mi · highs 68°F, 2.2 in rain · similar daytime temperatures, about as wet
- Amsterdam in September~132 mi · highs 65°F, 2.8 in rain · 2°C (4°F) cooler by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Cologne in September: quick answers
Is September a good time to visit Cologne?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 69°F (21°C) and 2.2 in (57 mm) of rain.
How hot is Cologne in September?
Average highs are 69°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 Cologne in September?
Not much: about 2.2 in (57 mm) of rain falls across September on average, the 2nd-driest month of the year. The annual total is about 31.1 in (791 mm).
What should I pack for Cologne in September?
Bring a warm layer for evenings (nights drop to 50°F) and comfortable walking shoes (most picks involve some walking).
Planning Cologne in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.