Trier
September
Weather in Trier for September 2025
Your guide to Trier weather in September - trends and predictions
In general, the average temperature in Trier at the beginning of September is 23.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.7 °C by the end of September.
Expect significant rainfall in Trier during September, with an average of 20 rainy days.
Is September a good time to visit Trier? check out the best time to travel to Trier page.
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Temperatures
Rain 🌧️
More
10
Dry days
20
Rainy days
0
Snow days
18°/10°
Temperatures
18 km/h
Avg max wind
81 %
Avg humidity
Trier in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2  25° | 3 25° | 4  18° | 5 23° | 6 18° | 7 26° |
| 8 21° | 9 16° | 10 16° | 11  13° | 12 12° | 13 13° | 14 15° |
| 15  17° | 16 14° | 17 21° | 18  22° | 19  22° | 20 21° | 21 23° |
| 22 22° | 23 16° | 24 13° | 25 15° | 26 16° | 27 14° | 28 12° |
| 29 13° | 30 13° |
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Temperatures trend during September in Trier
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Mist | 29° /15° | 0 mm | 6 | |
| 2 Sept. | Light rain shower | 25° /16° | 2.8 mm | 6 | |
| 3 Sept. | Patchy rain possible | 25° /15° | 2.9 mm | 6 | |
| 4 Sept. | Moderate rain | 18° /14° | 12.8 mm | 4 | |
| 5 Sept. | Light rain shower | 23° /13° | 9.1 mm | 5 | |
| 6 Sept. | Light rain shower | 18° /13° | 8.6 mm | 4 | |
| 7 Sept. | Mist | 26° /12° | 0.1 mm | 6 | |
| 8 Sept. | Fog | 21° /13° | 1.9 mm | 5 | |
| 9 Sept. | Light rain shower | 16° /13° | 6.7 mm | 4 | |
| 10 Sept. | Fog | 16° /10° | 1.2 mm | 4 | |
| 11 Sept. | Light rain | 13° /8° | 7.7 mm | 3 | |
| 12 Sept. | Patchy rain possible | 12° /3° | 0.2 mm | 3 | |
| 13 Sept. | Light rain shower | 13° /3° | 1.9 mm | 3 | |
| 14 Sept. | Patchy rain possible | 15° /3° | 0 mm | 4 | |
| 15 Sept. | Sunny | 17° /3° | 0 mm | 5 | |
| 16 Sept. | Light rain | 14° /7° | 4.2 mm | 3 | |
| 17 Sept. | Patchy rain possible | 21° /10° | 0 mm | 5 | |
| 18 Sept. | Partly cloudy | 22° /10° | 0 mm | 6 | |
| 19 Sept. | Thundery outbreaks possible | 22° /10° | 1.3 mm | 5 | |
| 20 Sept. | Sunny | 21° /9° | 0 mm | 6 | |
| 21 Sept. | Sunny | 23° /10° | 0 mm | 6 | |
| 22 Sept. | Patchy light drizzle | 22° /11° | 1.5 mm | 5 | |
| 23 Sept. | Light rain shower | 16° /10° | 3.2 mm | 4 | |
| 24 Sept. | Light rain shower | 13° /10° | 7.8 mm | 3 | |
| 25 Sept. | Light rain shower | 15° /10° | 12.3 mm | 4 | |
| 26 Sept. | Light rain shower | 16° /12° | 34.1 mm | 4 | |
| 27 Sept. | Patchy light drizzle | 14° /9° | 2.8 mm | 3 | |
| 28 Sept. | Light rain shower | 12° /4° | 3 mm | 3 | |
| 29 Sept. | Mist | 13° /3° | 0 mm | 3 | |
| 30 Sept. | Light drizzle | 13° /5° | 1.2 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Trier 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 Trier forecast closer to your planned date for the most up-to-date weather information.
Trier in September - FAQ
What are the expected maximum and minimum temperatures in Trier during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Trier during September?
Significant rainfall exceeding 127.4 mm is expected in Trier during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Trier during September?
The average wind speed in Trier during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Trier in September?
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
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- 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 Trier
Explore the daily rainfall trends and prepare for Triers September weather 💧
UV exposure in Trier during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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