Last updated: June 24, 2025
In December, the average temperature in South Cle Elum, United States hovers around -3°C (27°F), with extremes ranging from a chilling -21°C (-5°F) to a milder 11°C (52°F). Expect precipitation of about 164 mm (6.4 in) over 18 days, creating a notably moist environment with an average humidity of 88%.
In December in South Cle Elum, the average temperature is -3°C (27°F). The maximum can reach 11°C (52°F), while the minimum can plunge to as low as -21°C (-5°F). Travelers should be prepared for chilly conditions and pack accordingly for variable temperatures.
In South Cle Elum in December, the precipitation amount is 164 mm (6.4 in) over the course of 18 days.
In South Cle Elum in December humidity is 88%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps into your bones, making outdoor exploration less inviting as the dampness clings to your clothing and slows your movements.
In South Cle Elum 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 South Cle Elum, you can visit Hourly UV Index in South Cle Elum.
UV Risk Categories
Weather in South Cle Elum varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in South Cle Elum, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -3°C (27°F) | 148 mm (5.8 inches) | 86% | low |
February Weather | -3°C (26°F) | 170 mm (6.7 inches) | 86% | moderate |
March Weather | 0°C (33°F) | 94 mm (3.7 inches) | 87% | high |
April Weather | 3°C (38°F) | 79 mm (3.1 inches) | 84% | high |
May Weather | 9°C (48°F) | 53 mm (2.1 inches) | 81% | very high |
June Weather | 12°C (54°F) | 38 mm (1.5 inches) | 82% | very high |
July Weather | 15°C (60°F) | 7 mm (0.3 inches) | 79% | very high |
August Weather | 16°C (61°F) | 7 mm (0.3 inches) | 63% | very high |
September Weather | 12°C (53°F) | 51 mm (2.0 inches) | 62% | very high |
October Weather | 5°C (41°F) | 112 mm (4.4 inches) | 83% | moderate |
November Weather | 1°C (33°F) | 131 mm (5.1 inches) | 89% | moderate |
December Weather | -3°C (27°F) | 164 mm (6.4 inches) | 88% | low |