Last updated: June 24, 2025
In December, the average temperature in Savanna, United States hovers around -1°C (31°F). While you might experience a chilly low of -21°C (-6°F), there’s also the possibility of warmer days reaching up to 20°C (68°F). Expect about 48 mm (1.9 in) of precipitation spread over 6 days, and be prepared for elevated humidity levels at 84%.
In December, in Savanna, the average temperature is -1°C (31°F), with maximums reaching up to 20°C (68°F) and minimums dropping as low as -21°C (-6°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and frigid conditions.
In Savanna in December, the precipitation amount is 48 mm (1.9 in) distributed over 6 days.
In Savanna in December humidity is 84%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps through layers of clothing, making outdoor excursions brisk and invigorating, yet challenging for those unaccustomed to such damp conditions.
In Savanna 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 Savanna, you can visit Hourly UV Index in Savanna.
UV Risk Categories
Weather in Savanna varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Savanna, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 56 mm (2.2 inches) | 81% | moderate |
| February Weather | -4°C (25°F) | 59 mm (2.3 inches) | 81% | moderate |
| March Weather | 4°C (39°F) | 80 mm (3.1 inches) | 81% | high |
| April Weather | 9°C (48°F) | 100 mm (3.9 inches) | 82% | very high |
| May Weather | 16°C (61°F) | 142 mm (5.6 inches) | 78% | very high |
| June Weather | 22°C (73°F) | 127 mm (5.0 inches) | 81% | very high |
| July Weather | 24°C (76°F) | 83 mm (3.3 inches) | 79% | very high |
| August Weather | 23°C (73°F) | 91 mm (3.6 inches) | 77% | very high |
| September Weather | 20°C (67°F) | 119 mm (4.7 inches) | 78% | very high |
| October Weather | 12°C (53°F) | 111 mm (4.4 inches) | 78% | high |
| November Weather | 3°C (38°F) | 48 mm (1.9 inches) | 87% | moderate |
| December Weather | -1°C (31°F) | 48 mm (1.9 inches) | 84% | low |