Last updated: March 2, 2024
The weather in Heidelberg, Germany, during December is characterized by an average temperature of 4°C (39°F). Highs can soar to 13°C (55°F), while lows may dip to -5°C (24°F). Typically, the humidity level in Heidelberg throughout December hovers around 91%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Heidelberg averages 134 mm (5.3 inches) of rainfall, typically over the course of 19 rainy days. The month enjoys an average of 8 hours 12 minutes of daylight, with the sun shining for approximately 4 hours 19 minutes each day. Additionally, there is a 16% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in Heidelberg reaches a maximum of 1, indicating a level of Low exposure. The most intense UV radiation typically occurs between 09:00 and 11:00, during which unprotected skin may burn in as little as 45 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | ||||||||||||
| Time to burn | 45 min | ||||||||||||