Last updated: August 23, 2025
In Hartha, Germany, the average temperature for December hovers around 3°C (38°F), with a minimum dipping to -10°C (15°F) and a maximum reaching 13°C (55°F). Expect 81 mm (3.2 in) of precipitation spread over 17 days, and prepare for a rather humid experience with an average humidity of 92%.
In December in Hartha, the average temperature is 3°C (38°F). Maximum temperatures can reach as high as 13°C (55°F), while minimums can drop to as low as -10°C (15°F). Travelers should be prepared for cold weather and pack accordingly.
In Hartha, in December, the precipitation amount is 81 mm (3.2 in), occurring over a span of 17 days.
In Hartha in December humidity is 92%. With an average temperature of 3°C (38°F), this humidity feels like a wet chill that seeps into your bones, making outdoor activities uncomfortable and travel arrangements challenging.
In Hartha in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Hartha.
UV Risk Categories
Weather in Hartha varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hartha, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (35°F) | 73 mm (2.9 inches) | 90% | low |
| February Weather | 3°C (37°F) | 59 mm (2.3 inches) | 89% | low |
| March Weather | 5°C (41°F) | 65 mm (2.6 inches) | 87% | moderate |
| April Weather | 9°C (49°F) | 39 mm (1.5 inches) | 81% | moderate |
| May Weather | 13°C (56°F) | 67 mm (2.6 inches) | 71% | high |
| June Weather | 19°C (66°F) | 56 mm (2.2 inches) | 75% | very high |
| July Weather | 19°C (67°F) | 67 mm (2.6 inches) | 74% | very high |
| August Weather | 20°C (67°F) | 75 mm (3.0 inches) | 76% | high |
| September Weather | 15°C (59°F) | 55 mm (2.1 inches) | 81% | high |
| October Weather | 11°C (52°F) | 79 mm (3.1 inches) | 85% | moderate |
| November Weather | 6°C (43°F) | 49 mm (1.9 inches) | 88% | low |
| December Weather | 3°C (38°F) | 81 mm (3.2 inches) | 92% | low |