Last updated: June 24, 2025
In West Valley City, United States, the average temperature in December hovers around -1°C (30°F), with a chilly minimum of -13°C (8°F) and the occasional maximum reaching 15°C (59°F). Expect 47 mm (1.8 in) of precipitation spread over 10 days, contributing to an average humidity of a brisk 88%.
In December in West Valley City, the average temperature is -1°C (30°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -13°C (8°F). Travelers should be prepared for a wide range of temperatures during this time.
In West Valley City in December, the total precipitation amount is 47 mm (1.8 in) spread over a period of 10 days.
In West Valley City in December humidity is 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.
In West Valley City 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 West Valley City, you can check the information here.
UV Risk Categories
Weather in West Valley City varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in West Valley City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 52 mm (2.0 inches) | 91% | moderate |
| February Weather | 1°C (34°F) | 60 mm (2.4 inches) | 92% | moderate |
| March Weather | 6°C (43°F) | 61 mm (2.4 inches) | 84% | high |
| April Weather | 10°C (50°F) | 65 mm (2.6 inches) | 74% | very high |
| May Weather | 15°C (59°F) | 50 mm (2.0 inches) | 62% | very high |
| June Weather | 22°C (72°F) | 15 mm (0.6 inches) | 56% | extreme |
| July Weather | 27°C (81°F) | 10 mm (0.4 inches) | 44% | extreme |
| August Weather | 25°C (78°F) | 16 mm (0.6 inches) | 37% | very high |
| September Weather | 19°C (67°F) | 34 mm (1.3 inches) | 46% | very high |
| October Weather | 10°C (50°F) | 41 mm (1.6 inches) | 67% | high |
| November Weather | 5°C (41°F) | 34 mm (1.3 inches) | 84% | moderate |
| December Weather | -1°C (30°F) | 47 mm (1.8 inches) | 88% | moderate |