Heidelberg
December
Weather in Heidelberg for December 2025
Your guide to Heidelberg weather in December - trends and predictions
Until now, December 2025 in Heidelberg is cooler than usual, with temperatures averaging 25.5 °C, this is -3.8 °C below the typical seasonal average.
The forecast for the next days in Heidelberg predicts a temperature of 25.3 °C, which is cooler than the historical average.
In general, the average temperature in Heidelberg at the beginning of December is 29.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25 °C by the end of December.
Heidelberg in December brings notable rainfall, with an average of 20 rainy days and a total precipitation of 131.8 mm.
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Temperatures
Rain 🌧️
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11
Dry days
20
Rainy days
0
Snow days
29°/16°
Temperatures
23 km/h
Avg max wind
56 %
Avg humidity
Heidelberg Weather December
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Temperatures trend during December in Heidelberg
See the weather trend as well as the moving average line
December weather in Heidelberg day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Partly cloudy | 27° /14° | 3.3 mm | 10 | |
| 2 Dec. | Partly cloudy | 29° /14° | 3.9 mm | 10 | |
| 3 Dec. | Partly cloudy | 30° /13° | 5 mm | 10 | |
| 4 Dec. | Partly cloudy | 28° /15° | 0.4 mm | 10 | |
| 5 Dec. |  Patchy rain possible | 28° /15° | 9 mm | 9 | |
| 6 Dec. | Partly cloudy | 31° /16° | 0.4 mm | 10 | |
| 7 Dec. | Partly cloudy | 31° /17° | 0.9 mm | 10 | |
| 8 Dec. | Patchy rain possible | 29° /16° | 3 mm | 10 | |
| 9 Dec. | Patchy rain possible | 30° /16° | 1.6 mm | 10 | |
| 10 Dec. | Partly cloudy | 30° /15° | 4.3 mm | 10 | |
| 11 Dec. |  Patchy light rain | 30° /15° | 2.8 mm | 10 | |
| 12 Dec. | Patchy rain possible | 30° /15° | 0.9 mm | 10 | |
| 13 Dec. | Patchy rain possible | 27° /17° | 1.2 mm | 9 | |
| 14 Dec. | Patchy rain possible | 31° /15° | 2.6 mm | 10 | |
| 15 Dec. |  Sunny | 26° /12° | 0 mm | 2.4 | |
| 16 Dec. | Patchy rain possible | 26° /14° | 4 mm | 2.2 | |
| 17 Dec. | Patchy rain possible | 26° /15° | 2.2 mm | 2.4 | |
| 18 Dec. |  Moderate rain | 23° /14° | 16.2 mm | 2.5 | |
| 19 Dec. | Patchy rain possible | 26° /13° | 1.5 mm | 4.1 | |
| 20 Dec. | Patchy rain possible | 27° /15° | 2.2 mm | 7 | |
| 21 Dec. | Patchy rain possible | 28° /13° | 2 mm | 7 | |
| 22 Dec. | Patchy rain possible | 27° /14° | 2.3 mm | 7 | |
| 23 Dec. | Patchy rain possible | 25° /14° | 2.2 mm | 7 | |
| 24 Dec. | Patchy rain possible | 23° /15° | 1.2 mm | 7 | |
| 25 Dec. | Patchy rain possible | 20° /15° | 1.4 mm | 7 | |
| 26 Dec. | Patchy rain possible | 25° /13° | 0.2 mm | 7 | |
| 27 Dec. | Patchy rain possible | 27° /14° | 2.3 mm | 7 | |
| 28 Dec. | Patchy rain possible | 25° /15° | 2.5 mm | 7 | |
| 29 Dec. | Patchy rain possible | 26° /15° | 8.6 mm | 9 | |
| 30 Dec. | Patchy light drizzle | 27° /16° | 0.6 mm | 9 | |
| 31 Dec. | Patchy rain possible | 25° /17° | 12.8 mm | 9 | |
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Important Notice
Our weather forecast for Heidelberg in December 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 December - FAQ
What are the expected maximum and minimum temperatures in Heidelberg during December?
During December, expect a variety of temperatures with highs around 29° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Heidelberg during December?
Significant rainfall exceeding 131.8 mm is expected in Heidelberg during December, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Heidelberg during December?
The average wind speed in Heidelberg during December is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Heidelberg
Explore the daily rainfall trends and prepare for Heidelbergs December weather 💧
Typically, Heidelberg has 20 rainy days in December with a total of 131.8 mm of rainfall.
UV exposure in Heidelberg during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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