Last updated: June 24, 2025
In December, the average temperature in Selah, United States hovers around 0°C (32°F), with potential extremes ranging from a chilly -11°C (13°F) to a mild 17°C (63°F). Expect about 60 mm (2.4 in) of precipitation spread over 11 days, contributing to an average humidity of 88%. Dress warmly and be prepared for damp days!
In December in Selah, the average temperature is 0°C (32°F). The maximum can reach 17°C (63°F), and the minimum can be as low as -11°C (13°F). Be prepared for a wide range of temperatures and pack accordingly for your travels.
In Selah in December, the precipitation amount is 60 mm (2.4 in) over the course of 11 days.
In Selah in December, humidity is 88%. With an average temperature of 0°C (32°F), this humidity feels like a chilly, damp blanket enveloping you, making travel uncomfortable as every breath seems to carry the weight of the cold moisture, turning each step into a struggle against the biting chill.
In Selah 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 Selah, you can visit Hourly UV Index in Selah.
UV Risk Categories
Weather in Selah varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Selah, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 65 mm (2.5 inches) | 86% | low |
| February Weather | 0°C (32°F) | 66 mm (2.6 inches) | 86% | moderate |
| March Weather | 4°C (40°F) | 36 mm (1.4 inches) | 87% | moderate |
| April Weather | 9°C (49°F) | 27 mm (1.1 inches) | 84% | high |
| May Weather | 15°C (59°F) | 16 mm (0.6 inches) | 81% | very high |
| June Weather | 19°C (66°F) | 9 mm (0.4 inches) | 82% | very high |
| July Weather | 23°C (73°F) | 1 mm (0.0 inches) | 79% | very high |
| August Weather | 23°C (73°F) | 5 mm (0.2 inches) | 63% | very high |
| September Weather | 17°C (63°F) | 17 mm (0.7 inches) | 62% | very high |
| October Weather | 9°C (49°F) | 42 mm (1.6 inches) | 83% | moderate |
| November Weather | 3°C (38°F) | 49 mm (1.9 inches) | 89% | moderate |
| December Weather | 0°C (32°F) | 60 mm (2.4 inches) | 88% | low |