Weather in Trier for September 2026
So far, September 2026 in Trier is slightly warmer than the historical average by 1.1 °C.
Expect cooler weather in the next days in Trier with the forecast suggesting a temperature of 18.4 °C, lower than the historical average.
In general, the average temperature in Trier at the beginning of September is 23 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.3 °C by the end of September.
Trier experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 130.6 mm.
Is September a good time to visit Trier? check out the best time to travel to Trier page.
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Trier Weather September
Temperatures trend during September in Trier
September weather in Trier day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Mist | 23° /12° | 4.5 mm | 5 | |
| 2 Sept. |  Light rain shower | 22° /13° | 1.6 mm | 4 | |
| 3 Sept. | Patchy rain possible | 23° /13° | 2.1 mm | 4 | |
| 4 Sept. |  Moderate rain | 22° /14° | 5.5 mm | 4 | |
| 5 Sept. | Light rain shower | 22° /11° | 3.2 mm | 5 | |
| 6 Sept. |  Overcast | 22° /10° | 2.9 mm | 4 | |
| 7 Sept. | Mist | 27° /13° | 0.2 mm | 5 | |
| 8 Sept. | Fog | 23° /14° | 2.3 mm | 4 | |
| 9 Sept. | Light rain shower | 17° /11° | 5.4 mm | 4 | |
| 10 Sept. | Fog | 18° /9° | 0.9 mm | 4 | |
| 11 Sept. |  Light rain | 17° /10° | 3.5 mm | 3 | |
| 12 Sept. | Patchy rain possible | 17° /8° | 1.4 mm | 3 | |
| 13 Sept. | Light rain shower | 17° /8° | 5.9 mm | 3 | |
| 14 Sept. | Fog | 22° /14° | 0.6 mm | 4.6 | |
| 15 Sept. |  Sunny | 27° /18° | 0 mm | 4.8 | |
| 16 Sept. | Overcast | 19° /12° | 0.1 mm | 4.3 | |
| 17 Sept. | Overcast | 18° /9° | 0 mm | 4 | |
| 18 Sept. | Patchy rain possible | 16° /11° | 2.8 mm | 4 | |
| 19 Sept. | Overcast | 20° /9° | 0 mm | 4 | |
| 20 Sept. | Sunny | 23° /13° | 0 mm | 6 | |
| 21 Sept. | Fog | 20° /13° | 0 mm | 5 | |
| 22 Sept. | Sunny | 23° /13° | 0 mm | 6 | |
| 23 Sept. | Mist | 14° /7° | 0.6 mm | 4 | |
| 24 Sept. | Sunny | 14° /6° | 0 mm | 4 | |
| 25 Sept. | Overcast | 10° /6° | 0.1 mm | 2 | |
| 26 Sept. | Sunny | 15° /4° | 0 mm | 4 | |
| 27 Sept. | Sunny | 16° /4° | 0 mm | 5 | |
| 28 Sept. | Light rain shower | 15° /5° | 1.5 mm | 4 | |
| 29 Sept. | Mist | 15° /5° | 0 mm | 4 | |
| 30 Sept. | Light drizzle | 15° /6° | 1.4 mm | 4 | |
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Trier weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 25°/12° | 18°/9° | 14°/7° |
| Rainfall | 51 mm | 131 mm | 113 mm |
| Wind | 13.7 km/h | 16.9 km/h | 16.2 km/h |
| Humidity | 68% | 80% | 85% |
| Rainy days | 12 days | 23 days | 22 days |
| Dry days | 19 days | 7 days | 9 days |
Planning a trip to Trier? Discover the best time to visit
Trier in September - FAQ
What are the expected maximum and minimum temperatures in Trier during September?
How much rainfall should be expected in Trier during September?
What are the typical wind conditions in Trier during September?
September rainfall patterns in Trier
UV exposure in Trier during September
What to pack to Trier in September?
Mild & changeable · highs around 18 °C, frequent showers
As you prepare for your trip to Trier 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 Trier, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
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Where is Trier?Get accurate weather forecasts for Trier, located at latitude 49.756 and longitude 6.639. Stay updated with localized weather information tailored for Trier.