Weather in Cologne in September
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Book now, pay at pickup — compare Hertz, Avis, Budget, Sixt and 800+ rental companies for September in Cologne.
Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youCologne in September is pleasantly mild — daytime temperatures average 21.6°C, dropping to 12.5°C at night. The month is fairly wet (9 rainy days on average), with roughly 9.3 hours of sunshine a day. This is peak season for good reason — conditions are close to ideal. For the complete picture, see the best time to visit Cologne — every month compared. Once you know when to go, find your Cologne packing list at 247PackingList.
Get ready for Cologne in September
Search flights to Cologne
Compare 100+ airlines for September — one search, best price.
Search Flights →Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →What to pack for Cologne in September
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Light waterproof layer
Compare all months in Cologne
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 6.6°C | 86.6mm | 10/10 |
| February | 9.2°C | 77.1mm | 10/10 |
| March | 11.4°C | 77.0mm | 10/10 |
| April | 14.2°C | 54.9mm | 10/10 |
| May | 18.7°C | 52.4mm | 10/10 |
| June | 24.2°C | 81.0mm | 10/10 |
| July | 23.8°C | 110.9mm | 9/10 |
| August | 24.8°C | 66.7mm | 10/10 |
| September | 21.6°C | 80.3mm | 10/10 |
| October | 16.6°C | 73.0mm | 10/10 |
| November | 10.6°C | 80.1mm | 10/10 |
| December | 7.2°C | 100.3mm | 9/10 |
Full month-by-month guide: best time to visit Cologne →
For facts about Germany — currency, language and dialling code — see our Germany country guide at 247CountryInfo. Travellers also find it useful to keep a Cologne travel guide to hand. Check clothing sizes in Germany before you shop.
Frequently Asked Questions
Is September a good time to visit Cologne?
September rates 10/10 for visiting Cologne — excellent time to visit. Expect average highs of 21.6°C, 80.3mm of rain across the month and about 9.3 hours of daily sunshine.
What is the temperature in Cologne in September?
In September, Cologne has average highs of 21.6°C (70.9°F) and average lows of 12.5°C (54.5°F).
Does it rain in Cologne in September?
Some rain is likely. Cologne averages 80.3mm across about 9 rainy days in September, so a light waterproof layer is worth packing.
What should I wear in Cologne in September?
For Cologne in September (21.6°C highs / 12.5°C lows), pack light layers plus sunscreen, t-shirts and light trousers or shorts, light waterproof layer.
More essentials for Cologne in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.