Weather in Aachen for September 2026
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 in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 76.4 mm.
Is September a good time to visit Aachen? check out the best time to travel to Aachen page.
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Aachen Weather September
Temperatures trend during September in Aachen
September weather in Aachen day by day
| 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 | |
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Aachen weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 24°/14° | 21°/12° | 15°/8° |
| Rainfall | 81 mm | 76 mm | 83 mm |
| Wind | 18.3 km/h | 19.4 km/h | 21.7 km/h |
| Humidity | 68% | 71% | 79% |
| Rainy days | 21 days | 19 days | 21 days |
| Dry days | 10 days | 11 days | 10 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?
How much rainfall should be expected in Aachen during September?
What are the typical wind conditions in Aachen during September?
September rainfall patterns in Aachen
UV exposure in Aachen during September
What to pack to Aachen in September?
Mild & changeable · highs around 21 °C, frequent showers
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
👟 Footwear
🎒 Accessories
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Where is Aachen?Get accurate weather forecasts for Aachen, located at latitude 50.777 and longitude 6.083. Stay updated with localized weather information tailored for Aachen.