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Trier
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Weather in Trier for September 2025

Your guide to Trier weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Trier has been nearly identical to the historical average, with a temperature of 19.7 °C (showing only a slight deviation of -0.3 °C).

  • Expect cooler weather in the next days in Trier with the forecast suggesting a temperature of 18.1 °C, lower than the historical average.

  • In general, the average temperature in Trier at the beginning of September is 22.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.3 °C by the end of September.

    • Rain 🌧️

  • Trier in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 127.4 mm.

    • More

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

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

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/9°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Trier Weather September

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

Temperatures trend during September in Trier

See the weather trend as well as the moving average line

September weather in Trier day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 24° /13° 6.7 mm 5
2 Sept. Light rain shower
Light rain shower
 23° /13° 2.4 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 24° /14° 3.1 mm 6
4 Sept. Moderate rain
Moderate rain
 19° /13° 8.2 mm 5
5 Sept. Light rain shower
Light rain shower
 22° /11° 4.8 mm 5
6 Sept. Light rain shower
Light rain shower
 21° /11° 4.3 mm 5
7 Sept. Mist
Mist
 27° /11° 0.3 mm 7
8 Sept. Fog
Fog
 22° /13° 3.4 mm 5
9 Sept. Light rain shower
Light rain shower
 16° /12° 8 mm 4
10 Sept. Fog
Fog
 18° /9° 1.4 mm 4
11 Sept. Light rain
Light rain
 15° /9° 5.2 mm 4
12 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 2.2 mm 4
13 Sept. Light rain shower
Light rain shower
 15° /6° 5.4 mm 4
14 Sept. Patchy rain possible
Patchy rain possible
 16° /6° 0.9 mm 4
15 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 3.9 mm 1.1
16 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 1.4 mm 0.6
17 Sept. Partly cloudy
Partly cloudy
 16° /7° 0 mm 0.9
18 Sept. Sunny
Sunny
 24° /10° 0 mm 1.2
19 Sept. Sunny
Sunny
 27° /12° 0 mm 1.2
20 Sept. Sunny
Sunny
 27° /15° 0 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 1 mm 4
22 Sept. Moderate rain
Moderate rain
 18° /10° 6.1 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 13° /10° 4.1 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 0.8 mm 2
25 Sept. Patchy rain possible
Patchy rain possible
 16° /6° 0 mm 2
26 Sept. Sunny
Sunny
 14° /5° 0 mm 3
27 Sept. Sunny
Sunny
 14° /2° 0 mm 3
28 Sept. Sunny
Sunny
 16° /2° 0 mm 3
29 Sept. Mist
Mist
 13° /3° 0 mm 3
30 Sept. Light drizzle
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.
Change Month
‹
›

Trier weather in September vs August vs October

Compare September weather in Trier 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
Cloudy
Cloudy
Temperatures24°/13°18°/9°14°/7°
Rainfall83 mm127 mm126 mm
Wind12.8 km/h17.6 km/h14.4 km/h
Humidity76%81%87%
Rainy days13 days20 days13 days
Dry days18 days10 days18 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?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 9°. 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 ☀️

Quick links

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Location coordinates 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.

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