Aachen
September
Weather in Aachen for September 2026
Your guide to Aachen weather in September - trends and predictions
In general, the average temperature in Aachen at the beginning of September is 24.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.1 °C by the end of September.
Aachen experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 181.2 mm.
Is September a good time to visit Aachen? check out the best time to travel to Aachen page.
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Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
24°/10°
Temperatures
19 km/h
Avg max wind
72 %
Avg humidity
Aachen Weather September
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Temperatures trend during September in Aachen
See the weather trend as well as the moving average line
September weather in Aachen day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Heavy rain | 23° /14° | 21.6 mm | 5 | |
| 2 Sept. |  Patchy rain possible | 24° /15° | 4.7 mm | 5 | |
| 3 Sept. |  Partly cloudy | 24° /15° | 0.6 mm | 6 | |
| 4 Sept. |  Cloudy | 22° /13° | 4.5 mm | 5 | |
| 5 Sept. |  Sunny | 26° /13° | 1 mm | 6 | |
| 6 Sept. | Sunny | 25° /14° | 0.7 mm | 6 | |
| 7 Sept. | Sunny | 29° /13° | 0.2 mm | 7 | |
| 8 Sept. | Sunny | 26° /16° | 1.1 mm | 6 | |
| 9 Sept. | Partly cloudy | 21° /14° | 5.9 mm | 5 | |
| 10 Sept. | Sunny | 22° /13° | 0.6 mm | 6 | |
| 11 Sept. | Sunny | 21° /12° | 6 mm | 5 | |
| 12 Sept. |  Mist | 18° /10° | 1.4 mm | 4 | |
| 13 Sept. | Mist | 17° /9° | 2.8 mm | 4 | |
| 14 Sept. | Cloudy | 18° /9° | 0.3 mm | 5 | |
| 15 Sept. | Partly cloudy | 20° /10° | 0.4 mm | 5 | |
| 16 Sept. | Patchy rain possible | 20° /12° | 1.2 mm | 5 | |
| 17 Sept. | Light rain shower | 21° /12° | 1.4 mm | 5 | |
| 18 Sept. | Sunny | 23° /13° | 0.5 mm | 6 | |
| 19 Sept. |  Overcast | 23° /12° | 0.7 mm | 5 | |
| 20 Sept. | Partly cloudy | 24° /14° | 0.8 mm | 6 | |
| 21 Sept. | Light rain shower | 22° /11° | 4.4 mm | 5 | |
| 22 Sept. | Patchy rain possible | 19° /9° | 1.4 mm | 4 | |
| 23 Sept. | Patchy rain possible | 17° /8° | 1.1 mm | 4 | |
| 24 Sept. | Partly cloudy | 17° /9° | 0.7 mm | 4 | |
| 25 Sept. | Cloudy | 16° /10° | 4.7 mm | 4 | |
| 26 Sept. | Sunny | 18° /11° | 2.8 mm | 4 | |
| 27 Sept. | Light rain shower | 18° /10° | 1.9 mm | 4 | |
| 28 Sept. | Partly cloudy | 17° /9° | 1.6 mm | 5 | |
| 29 Sept. | Light rain shower | 18° /10° | 0.5 mm | 4 | |
| 30 Sept. | Light rain shower | 16° /8° | 1.2 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Aachen 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 Aachen forecast closer to your planned date for the most up-to-date weather information.
Change Month
Aachen weather in September vs August vs October
Compare September weather in Aachen with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Light rain shower | Patchy rain possible |
| Temperatures | 27°/12° | 24°/10° | 18°/7° |
| Rainfall | 229 mm | 181 mm | 186 mm |
| Wind | 18.2 km/h | 18.6 km/h | 21.7 km/h |
| Humidity | 70% | 72% | 79% |
| Rainy days | 13 days | 6 days | 7 days |
| Dry days | 18 days | 24 days | 24 days |
Planning a trip to Aachen? Discover the best time to visit
Aachen in September - FAQ
What are the expected maximum and minimum temperatures in Aachen during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Aachen during September?
Significant rainfall exceeding 181.2 mm is expected in Aachen during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Aachen during September?
The average wind speed in Aachen during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Aachen in September?
As you prepare for your trip to Aachen 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 Aachen, 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 Aachen
Explore the daily rainfall trends and prepare for Aachens September weather 💧
UV exposure in Aachen during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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