Last updated: June 24, 2025
In West Richland, United States, the average temperature in December hovers around 2°C (36°F), with a minimum that can dip to -9°C (17°F) and a maximum reaching 20°C (68°F). Expect 30 mm (1.2 in) of precipitation over about 6 days, accompanied by a high average humidity of 86%.
In December in West Richland, the average temperature is 2°C (36°F). Maximums can reach 20°C (68°F), while minimums can drop to as low as -9°C (17°F). Be prepared for a wide range of temperatures when traveling to West Richland during this time.
In West Richland in December, the total precipitation amount is 30 mm (1.2 in) spread across 6 days.
In West Richland in December, humidity is 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.
In West Richland 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 Richland, you can visit Hourly UV Index in West Richland.
UV Risk Categories
Weather in West Richland varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in West Richland, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 2°C (35°F) | 36 mm (1.4 inches) | 85% | low |
February Weather | 2°C (37°F) | 39 mm (1.5 inches) | 86% | moderate |
March Weather | 8°C (47°F) | 26 mm (1.0 inches) | 86% | moderate |
April Weather | 13°C (56°F) | 22 mm (0.9 inches) | 82% | high |
May Weather | 19°C (67°F) | 13 mm (0.5 inches) | 77% | very high |
June Weather | 24°C (75°F) | 7 mm (0.3 inches) | 79% | very high |
July Weather | 28°C (82°F) | 0 mm (0.0 inches) | 77% | very high |
August Weather | 27°C (80°F) | 3 mm (0.1 inches) | 62% | very high |
September Weather | 20°C (69°F) | 8 mm (0.3 inches) | 60% | high |
October Weather | 12°C (54°F) | 23 mm (0.9 inches) | 80% | moderate |
November Weather | 6°C (42°F) | 30 mm (1.2 inches) | 87% | moderate |
December Weather | 2°C (36°F) | 30 mm (1.2 inches) | 86% | low |