Last updated: June 24, 2025
In December, the average temperature in West Salem, United States hovers around -3°C (27°F). However, don't be fooled by the average—temperatures can plunge to a chilly -24°C (-12°F) or peak at a mild 17°C (63°F). Expect about 45 mm (1.8 in) of precipitation spread over 7 days and enjoy the crisp air with an average humidity of 82%.
In December in West Salem, the average temperature is -3°C (27°F). The maximum can reach 17°C (63°F), while the minimum can drop as low as -24°C (-12°F). Travelers should be prepared for a wide range of temperatures during this time.
In West Salem in December, the precipitation amount is 45 mm (1.8 in) spread over a duration of 7 days.
In West Salem in December, humidity is 82%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making traveling uncomfortable and necessitating extra layers to stay warm while navigating through the damp air.
In West Salem 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 West Salem, you can visit Hourly UV Index in West Salem.
UV Risk Categories
Weather in West Salem varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in West Salem, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (19°F) | 36 mm (1.4 inches) | 84% | low |
| February Weather | -6°C (21°F) | 50 mm (2.0 inches) | 85% | moderate |
| March Weather | 2°C (35°F) | 57 mm (2.2 inches) | 84% | moderate |
| April Weather | 7°C (45°F) | 86 mm (3.4 inches) | 83% | very high |
| May Weather | 15°C (59°F) | 137 mm (5.4 inches) | 75% | very high |
| June Weather | 21°C (71°F) | 125 mm (4.9 inches) | 79% | very high |
| July Weather | 23°C (74°F) | 100 mm (3.9 inches) | 75% | very high |
| August Weather | 21°C (70°F) | 121 mm (4.8 inches) | 69% | very high |
| September Weather | 18°C (64°F) | 105 mm (4.1 inches) | 74% | high |
| October Weather | 10°C (50°F) | 114 mm (4.5 inches) | 79% | moderate |
| November Weather | 2°C (35°F) | 51 mm (2.0 inches) | 88% | moderate |
| December Weather | -3°C (27°F) | 45 mm (1.8 inches) | 82% | low |