Last updated: June 24, 2025
In December, the average temperature in Vienna, United States hovers around 4°C (40°F), making it a chilly time of year. Temperatures can drop to a brisk -15°C (5°F) at the low end, while reaching a comfortable 24°C (76°F) on warmer days. Expect about 47 mm (1.9 in) of precipitation over 5 days, contributing to a high average humidity of 86%, adding to the overall crisp atmosphere.
In December in Vienna, the average temperature is 4°C (40°F), with maximums reaching 24°C (76°F) and minimums dropping to as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures, from chilly days to pleasantly warm afternoons.
In Vienna in December, the precipitation amount is 47 mm (1.9 in) spread over a duration of 5 days.
In Vienna in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.
In Vienna in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Vienna, you can check the information here.
UV Risk Categories
Weather in Vienna varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Vienna, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 75 mm (3.0 inches) | 82% | moderate |
| February Weather | 2°C (36°F) | 76 mm (3.0 inches) | 80% | moderate |
| March Weather | 9°C (48°F) | 129 mm (5.1 inches) | 80% | high |
| April Weather | 13°C (55°F) | 129 mm (5.1 inches) | 80% | very high |
| May Weather | 19°C (66°F) | 166 mm (6.5 inches) | 82% | very high |
| June Weather | 24°C (76°F) | 87 mm (3.4 inches) | 83% | extreme |
| July Weather | 26°C (80°F) | 97 mm (3.8 inches) | 81% | extreme |
| August Weather | 25°C (77°F) | 95 mm (3.7 inches) | 80% | very high |
| September Weather | 22°C (73°F) | 51 mm (2.0 inches) | 76% | very high |
| October Weather | 15°C (59°F) | 102 mm (4.0 inches) | 76% | high |
| November Weather | 7°C (45°F) | 62 mm (2.4 inches) | 85% | moderate |
| December Weather | 4°C (40°F) | 47 mm (1.9 inches) | 86% | moderate |