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Weather in Cologne for September 2025

Your guide to Cologne weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Cologne is cooler than usual, with temperatures averaging 22.2 °C, this is -2.5 °C below the typical seasonal average.

  • Expect cooler weather in the next days in Cologne with the forecast suggesting a temperature of 22.5 °C, lower than the historical average.

  • In general, the average temperature in Cologne at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.1 °C by the end of September.

    • Rain 🌧️

  • Cologne experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 146.2 mm.

    • More

  • Is September a good time to visit Cologne? check out the best time to travel to Cologne page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
6
Dry days
Average rainy days
24
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/14°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Cologne Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
26°
2
Partly cloudy
26°
3
Sunny
26°
4
Overcast
27°
5
Overcast
22°
6
Sunny
25°
7
Sunny
26°
8
Sunny
25°
9
Sunny
25°
10
Sunny
24°
11
Sunny
25°
12
Partly cloudy
22°
13
Thundery outbreaks possible
21°
14
Moderate or heavy rain shower
21°
15
Patchy rain possible
23°
16
Patchy rain possible
22°
17
Patchy rain possible
20°
18
Sunny
23°
19
Sunny
25°
20
Sunny
26°
21
Sunny
26°
22
Sunny
25°
23
Sunny
25°
24
Patchy rain possible
23°
25
Moderate rain
17°
26
Patchy rain possible
18°
27
Patchy rain possible
20°
28
Sunny
21°
29
Sunny
21°
30
Sunny
21°

Temperatures trend during September in Cologne

See the weather trend as well as the moving average line

September weather in Cologne day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 26° /15° 5.5 mm 6
2 Sept. Partly cloudy
Partly cloudy
 26° /15° 6.4 mm 6
3 Sept. Sunny
Sunny
 26° /14° 0.8 mm 6
4 Sept. Overcast
Overcast
 27° /16° 5.5 mm 6
5 Sept. Overcast
Overcast
 22° /14° 16.2 mm 5
6 Sept. Sunny
Sunny
 25° /13° 0.6 mm 6
7 Sept. Sunny
Sunny
 26° /14° 0 mm 7
8 Sept. Sunny
Sunny
 25° /16° 2.5 mm 6
9 Sept. Sunny
Sunny
 25° /15° 1.5 mm 6
10 Sept. Sunny
Sunny
 24° /15° 7.3 mm 6
11 Sept. Sunny
Sunny
 25° /14° 3 mm 6
12 Sept. Partly cloudy
Partly cloudy
 22° /14° 14.3 mm 5
13 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 21° /12° 4 mm 5
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /12° 7.2 mm 5
15 Sept. Patchy rain possible
Patchy rain possible
 23° /16° 0.2 mm 1.1
16 Sept. Patchy rain possible
Patchy rain possible
 22° /18° 1.8 mm 0.9
17 Sept. Patchy rain possible
Patchy rain possible
 20° /15° 0.5 mm 0.8
18 Sept. Sunny
Sunny
 23° /15° 0 mm 1.5
19 Sept. Sunny
Sunny
 25° /17° 0 mm 5
20 Sept. Sunny
Sunny
 26° /18° 0 mm 6
21 Sept. Sunny
Sunny
 26° /19° 0 mm 6
22 Sept. Sunny
Sunny
 25° /19° 0 mm 6
23 Sept. Sunny
Sunny
 25° /18° 0.1 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 23° /19° 1.9 mm 5
25 Sept. Moderate rain
Moderate rain
 17° /15° 7.6 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 18° /15° 2.8 mm 4
27 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 0.1 mm 4
28 Sept. Sunny
Sunny
 21° /12° 10.2 mm 5
29 Sept. Sunny
Sunny
 21° /11° 0.1 mm 6
30 Sept. Sunny
Sunny
 21° /13° 0.1 mm 6
Next
Important Notice
Our weather forecast for Cologne in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cologne forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Cologne weather in September vs August vs October

Compare September weather in Cologne with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures30°/18°23°/14°18°/12°
Rainfall102 mm146 mm246 mm
Wind9.5 km/h8.9 km/h7.1 km/h
Humidity66%71%80%
Rainy days18 days24 days22 days
Dry days13 days6 days9 days

Planning a trip to Cologne? Discover the best time to visit

Cologne in September - FAQ

What are the expected maximum and minimum temperatures in Cologne during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cologne during September?
Significant rainfall exceeding 146.2 mm is expected in Cologne during September, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cologne during September?
The average wind speed in Cologne during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Cologne in September?

As you prepare for your trip to Cologne in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Cologne, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

September rainfall patterns in Cologne

Explore the daily rainfall trends and prepare for Colognes September weather 💧

UV exposure in Cologne during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Get accurate weather forecasts for Cologne, located at latitude 45.579 and longitude 9.942. Stay updated with localized weather information tailored for Cologne.

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