Last updated: June 24, 2025
In December, the average temperature in Sheridan, United States hovers around -4°C (26°F), with extremes ranging from a chilling -22°C (-8°F) to a surprisingly warm 18°C (64°F). Visitors can expect 33 mm (1.3 in) of precipitation over 9 days, accompanied by a high average humidity of 81%. Whether you're braving the cold or enjoying the milder days, be prepared for a uniquely frosty experience!
In December, in Sheridan, the average temperature is -4°C (26°F). The maximum can reach 18°C (64°F), while the minimum can drop as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures and plan their activities accordingly.
In Sheridan in December, the precipitation amount is 33 mm (1.3 in) over the course of 9 days.
In Sheridan in December, humidity is 81%. With an average temperature of -4°C (26°F), this humidity feels like a biting chill that seeps into your bones, making traveling quite uncomfortable and necessitating extra layers to stay warm and dry.
In Sheridan 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 Sheridan, you can visit Hourly UV Index in Sheridan.
UV Risk Categories
Weather in Sheridan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sheridan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 27 mm (1.1 inches) | 78% | moderate |
| February Weather | -8°C (19°F) | 45 mm (1.8 inches) | 79% | moderate |
| March Weather | 0°C (32°F) | 61 mm (2.4 inches) | 71% | high |
| April Weather | 3°C (37°F) | 95 mm (3.7 inches) | 70% | very high |
| May Weather | 9°C (48°F) | 101 mm (4.0 inches) | 75% | very high |
| June Weather | 15°C (60°F) | 72 mm (2.8 inches) | 82% | extreme |
| July Weather | 19°C (67°F) | 50 mm (2.0 inches) | 84% | extreme |
| August Weather | 18°C (64°F) | 50 mm (2.0 inches) | 85% | very high |
| September Weather | 13°C (56°F) | 57 mm (2.2 inches) | 79% | very high |
| October Weather | 4°C (40°F) | 73 mm (2.9 inches) | 75% | high |
| November Weather | 0°C (32°F) | 40 mm (1.6 inches) | 75% | moderate |
| December Weather | -4°C (26°F) | 33 mm (1.3 inches) | 81% | low |