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Weather in Heidelberg for September 2025

Your guide to Heidelberg weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Heidelberg has been nearly identical to the historical average, with a temperature of 26.3 °C (showing only a slight deviation of 0.5 °C).

  • The forecast for the upcoming days in Heidelberg predicts a temperature of 28.4 °C, which is slightly above the historical average.

  • In general, the average temperature in Heidelberg at the beginning of September is 25.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 27.6 °C by the end of September.

    • Rain 🌧️

  • With an average of 2 rainy days, Heidelberg experiences minimal rainfall in September.

    • More

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

Average dry days
28
Dry days
Average rainy days
2
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/11°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
36 %
Avg humidity

Heidelberg Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
25°
2
Sunny
25°
3
Sunny
27°
4
Sunny
26°
5
Sunny
25°
6
Sunny
26°
7
Sunny
25°
8
Sunny
26°
9
Patchy rain possible
26°
10
Partly cloudy
23°
11
Partly cloudy
26°
12
Sunny
28°
13
Sunny
28°
14
Sunny
29°
15
Sunny
26°
16
Sunny
26°
17
Sunny
26°
18
Sunny
28°
19
Sunny
30°
20
Sunny
28°
21
Sunny
31°
22
Sunny
31°
23
Sunny
28°
24
Patchy rain possible
27°
25
Sunny
27°
26
Sunny
29°
27
Patchy rain possible
29°
28
Sunny
31°
29
Partly cloudy
29°
30
Sunny
21°

Temperatures trend during September in Heidelberg

See the weather trend as well as the moving average line

September weather in Heidelberg day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 25° /10° 0 mm 8
2 Sept. Sunny
Sunny
 25° /12° 0 mm 8
3 Sept. Sunny
Sunny
 27° /12° 0 mm 8
4 Sept. Sunny
Sunny
 26° /12° 0 mm 8
5 Sept. Sunny
Sunny
 25° /12° 0 mm 8
6 Sept. Sunny
Sunny
 26° /12° 2.8 mm 8
7 Sept. Sunny
Sunny
 25° /11° 0.1 mm 7
8 Sept. Sunny
Sunny
 26° /13° 0 mm 8
9 Sept. Patchy rain possible
Patchy rain possible
 26° /12° 0.4 mm 7
10 Sept. Partly cloudy
Partly cloudy
 23° /10° 0 mm 8
11 Sept. Partly cloudy
Partly cloudy
 26° /12° 0 mm 8
12 Sept. Sunny
Sunny
 28° /15° 0 mm 8
13 Sept. Sunny
Sunny
 28° /15° 0.2 mm 8
14 Sept. Sunny
Sunny
 29° /16° 0 mm 8
15 Sept. Sunny
Sunny
 26° /11° 0 mm 2.1
16 Sept. Sunny
Sunny
 26° /13° 0 mm 2.2
17 Sept. Sunny
Sunny
 26° /8° 0 mm 2.4
18 Sept. Sunny
Sunny
 28° /11° 0 mm 2.4
19 Sept. Sunny
Sunny
 30° /15° 0 mm 2.7
20 Sept. Sunny
Sunny
 28° /17° 0 mm 7
21 Sept. Sunny
Sunny
 31° /14° 0 mm 7
22 Sept. Sunny
Sunny
 31° /16° 0 mm 7
23 Sept. Sunny
Sunny
 28° /12° 0 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 27° /12° 1.2 mm 5
25 Sept. Sunny
Sunny
 27° /12° 0 mm 6
26 Sept. Sunny
Sunny
 29° /15° 0 mm 7
27 Sept. Patchy rain possible
Patchy rain possible
 29° /18° 0.3 mm 6
28 Sept. Sunny
Sunny
 31° /18° 0 mm 7
29 Sept. Partly cloudy
Partly cloudy
 29° /15° 0.9 mm 8
30 Sept. Sunny
Sunny
 21° /8° 0 mm 7
Next
Important Notice
Our weather forecast for Heidelberg 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 Heidelberg forecast closer to your planned date for the most up-to-date weather information.
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Heidelberg in September - FAQ

What are the expected maximum and minimum temperatures in Heidelberg during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Heidelberg during September?
Rainfall in Heidelberg during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Heidelberg during September?
The average wind speed in Heidelberg during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Heidelberg

Explore the daily rainfall trends and prepare for Heidelbergs September weather 💧

UV exposure in Heidelberg during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Heidelberg?

Get accurate weather forecasts for Heidelberg, located at latitude -26.505 and longitude 28.359. Stay updated with localized weather information tailored for Heidelberg.

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