Weather in Ulm for September 2025
Until now, September 2025 in Ulm is cooler than usual, with temperatures averaging 18.4 °C, this is -2.5 °C below the typical seasonal average.
The forecast for the upcoming days in Ulm predicts a temperature of 21.5 °C, which is slightly above the historical average.
In general, the average temperature in Ulm at the beginning of September is 22 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.9 °C by the end of September.
Ulm experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 86.3 mm.
Is September a good time to visit Ulm? check out the best time to travel to Ulm page.
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Ulm Weather September
Temperatures trend during September in Ulm
September weather in Ulm day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 22° /11° | 1.4 mm | 5 | |
| 2 Sept. |  Sunny | 22° /12° | 5.9 mm | 5 | |
| 3 Sept. | Patchy rain possible | 23° /12° | 1.2 mm | 6 | |
| 4 Sept. | Light rain shower | 22° /12° | 13.8 mm | 5 | |
| 5 Sept. | Sunny | 20° /11° | 4 mm | 5 | |
| 6 Sept. | Sunny | 21° /9° | 4.1 mm | 5 | |
| 7 Sept. | Sunny | 24° /10° | 0 mm | 5 | |
| 8 Sept. | Sunny | 23° /11° | 2.7 mm | 6 | |
| 9 Sept. | Light rain shower | 20° /12° | 6.7 mm | 5 | |
| 10 Sept. | Light rain shower | 20° /11° | 2.7 mm | 5 | |
| 11 Sept. | Sunny | 20° /10° | 6.4 mm | 5 | |
| 12 Sept. |  Thundery outbreaks possible | 18° /8° | 1 mm | 4 | |
| 13 Sept. |  Mist | 16° /8° | 2.6 mm | 4 | |
| 14 Sept. | Light rain shower | 15° /9° | 7.2 mm | 4 | |
| 15 Sept. | Patchy rain possible | 22° /14° | 1.5 mm | 1.1 | |
| 16 Sept. |  Partly cloudy | 16° /10° | 0.1 mm | 0.9 | |
| 17 Sept. | Partly cloudy | 18° /7° | 0.1 mm | 1 | |
| 18 Sept. | Sunny | 22° /9° | 0 mm | 1.3 | |
| 19 Sept. | Sunny | 25° /12° | 0 mm | 1.4 | |
| 20 Sept. | Sunny | 26° /14° | 0 mm | 5 | |
| 21 Sept. | Sunny | 26° /15° | 0 mm | 5 | |
| 22 Sept. | Partly cloudy | 24° /15° | 0 mm | 5 | |
| 23 Sept. | Patchy rain possible | 24° /14° | 2.5 mm | 4 | |
| 24 Sept. | Patchy rain possible | 19° /13° | 1.1 mm | 4 | |
| 25 Sept. | Patchy rain possible | 21° /11° | 1.3 mm | 4 | |
| 26 Sept. | Patchy rain possible | 19° /12° | 0.9 mm | 3 | |
| 27 Sept. | Sunny | 20° /11° | 0 mm | 4 | |
| 28 Sept. | Patchy rain possible | 19° /11° | 1.8 mm | 3 | |
| 29 Sept. | Partly cloudy | 18° /7° | 0 mm | 5 | |
| 30 Sept. | Patchy rain possible | 16° /6° | 1.9 mm | 4 | |
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Ulm weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 24°/13° | 19°/10° | 15°/7° |
| Rainfall | 199 mm | 86 mm | 57 mm |
| Wind | 13.5 km/h | 15.2 km/h | 16.1 km/h |
| Humidity | 79% | 81% | 81% |
| Rainy days | 22 days | 22 days | 16 days |
| Dry days | 9 days | 8 days | 15 days |
Planning a trip to Ulm? Discover the best time to visit
Ulm in September - FAQ
What to pack to Ulm in September?
As you prepare for your trip to Ulm 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 Ulm, 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 Ulm
UV exposure in Ulm during September
Quick links
Where is Ulm?Get accurate weather forecasts for Ulm, located at latitude 48.398 and longitude 9.992. Stay updated with localized weather information tailored for Ulm.