Mainz
September
Weather in Mainz for September 2026
Your guide to Mainz weather in September - trends and predictions
In general, the average temperature in Mainz at the beginning of September is 25 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.6 °C by the end of September.
Mainz in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 64.7 mm.
Is September a good time to visit Mainz? check out the best time to travel to Mainz page.
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Temperatures
Rain 🌧️
More
13
Dry days
17
Rainy days
0
Snow days
21°/14°
Temperatures
14 km/h
Avg max wind
64 %
Avg humidity
Mainz Weather September
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Temperatures trend during September in Mainz
See the weather trend as well as the moving average line
September weather in Mainz day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 23° /16° | 4.2 mm | 5 | |
| 2 Sept. |  Fog | 25° /16° | 1.3 mm | 6 | |
| 3 Sept. |  Sunny | 26° /17° | 0.9 mm | 6 | |
| 4 Sept. | Sunny | 23° /16° | 1 mm | 6 | |
| 5 Sept. | Sunny | 26° /16° | 1.1 mm | 6 | |
| 6 Sept. | Sunny | 24° /16° | 0.4 mm | 6 | |
| 7 Sept. | Sunny | 28° /16° | 0 mm | 7 | |
| 8 Sept. | Sunny | 25° /16° | 0.9 mm | 6 | |
| 9 Sept. | Sunny | 22° /15° | 11.7 mm | 5 | |
| 10 Sept. | Patchy rain possible | 22° /15° | 0 mm | 5 | |
| 11 Sept. |  Overcast | 22° /14° | 1.8 mm | 5 | |
| 12 Sept. |  Thundery outbreaks possible | 21° /12° | 3.3 mm | 4 | |
| 13 Sept. | Overcast | 18° /12° | 1.1 mm | 4 | |
| 14 Sept. |  Cloudy | 20° /12° | 1.6 mm | 4 | |
| 15 Sept. |  Partly cloudy | 22° /13° | 0.7 mm | 5 | |
| 16 Sept. | Partly cloudy | 20° /13° | 1 mm | 5 | |
| 17 Sept. | Partly cloudy | 22° /13° | 0.3 mm | 6 | |
| 18 Sept. | Sunny | 25° /14° | 1.1 mm | 6 | |
| 19 Sept. | Overcast | 24° /14° | 0 mm | 6 | |
| 20 Sept. | Partly cloudy | 26° /14° | 0 mm | 7 | |
| 21 Sept. |  Patchy light rain | 24° /13° | 9.4 mm | 6 | |
| 22 Sept. | Light rain shower | 19° /12° | 1.7 mm | 5 | |
| 23 Sept. | Patchy rain possible | 18° /11° | 0.4 mm | 4 | |
| 24 Sept. | Sunny | 17° /11° | 4.6 mm | 4 | |
| 25 Sept. | Sunny | 16° /10° | 3.3 mm | 4 | |
| 26 Sept. | Sunny | 17° /11° | 10.6 mm | 4 | |
| 27 Sept. | Patchy rain possible | 18° /12° | 0.1 mm | 4 | |
| 28 Sept. | Sunny | 19° /11° | 0.2 mm | 5 | |
| 29 Sept. | Patchy rain possible | 19° /12° | 0 mm | 4 | |
| 30 Sept. | Light rain shower | 17° /11° | 2.1 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Mainz 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 Mainz forecast closer to your planned date for the most up-to-date weather information.
Change Month
Mainz weather in September vs August vs October
Compare September weather in Mainz 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 | Patchy rain possible | Patchy rain possible |
| Temperatures | 26°/17° | 21°/14° | 15°/10° |
| Rainfall | 67 mm | 65 mm | 73 mm |
| Wind | 12.8 km/h | 13.6 km/h | 13.8 km/h |
| Humidity | 60% | 64% | 72% |
| Rainy days | 20 days | 17 days | 21 days |
| Dry days | 11 days | 13 days | 10 days |
Planning a trip to Mainz? Discover the best time to visit
Mainz in September - FAQ
What are the expected maximum and minimum temperatures in Mainz during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Mainz during September?
Moderate rainfall is anticipated in Mainz during September, with a total of 64.7 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Mainz during September?
The average wind speed in Mainz during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Mainz in September?
As you prepare for your trip to Mainz 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 Mainz, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long trousers
- 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 Mainz
Explore the daily rainfall trends and prepare for Mainzs September weather 💧
Typically, Mainz has 17 rainy days in September with a total of 64.7 mm of rainfall.
UV exposure in Mainz during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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