Last updated: August 22, 2025
In December, the average temperature in Rachau, Austria hovers around -2°C (29°F). Expect chilly days, with minimums plummeting to -18°C (0°F) and maximums reaching up to 9°C (48°F). The month brings about 69 mm (2.7 in) of precipitation across 13 days, contributing to an average humidity of 89%. Dress warmly and stay prepared for the wet conditions!
In December in Rachau, the average temperature is -2°C (29°F). The maximum can reach 9°C (48°F), while the minimum can drop as low as -18°C (0°F). Travelers should be prepared for cold conditions and dress accordingly when visiting during this time.
In Rachau in December, the precipitation amount is 69 mm (2.7 in) over the course of 13 days.
In Rachau in December humidity is 89%. With an average temperature of -2°C (29°F), this humidity feels like a suffocating fog that clings to your skin, making outdoor adventures less enjoyable and giving travel a heavy and oppressive feel.
In Rachau in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Rachau, you can visit Hourly UV Index in Rachau.
UV Risk Categories
Weather in Rachau varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Rachau, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 40 mm (1.6 inches) | 91% | low |
| February Weather | -1°C (31°F) | 44 mm (1.7 inches) | 87% | moderate |
| March Weather | 2°C (36°F) | 52 mm (2.0 inches) | 82% | moderate |
| April Weather | 7°C (44°F) | 72 mm (2.8 inches) | 79% | high |
| May Weather | 10°C (51°F) | 157 mm (6.2 inches) | 74% | very high |
| June Weather | 16°C (61°F) | 116 mm (4.6 inches) | 75% | very high |
| July Weather | 17°C (62°F) | 143 mm (5.6 inches) | 74% | very high |
| August Weather | 17°C (62°F) | 166 mm (6.5 inches) | 68% | very high |
| September Weather | 12°C (54°F) | 122 mm (4.8 inches) | 74% | high |
| October Weather | 8°C (46°F) | 68 mm (2.7 inches) | 88% | moderate |
| November Weather | 3°C (37°F) | 75 mm (3.0 inches) | 90% | moderate |
| December Weather | -2°C (29°F) | 69 mm (2.7 inches) | 89% | low |