Last updated: June 24, 2025
In Okanogan, United States, the average temperature in December hovers around -2°C (28°F), with extremes ranging from a chilling -22°C (-7°F) to a mild 15°C (60°F). Expect around 63 mm (2.5 in) of precipitation spread over 11 days, contributing to a high average humidity of 93%. Be prepared for a truly brisk and wet experience!
In December in Okanogan, the average temperature is -2°C (28°F), with maximums reaching 15°C (60°F) and minimums dropping as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack layers for warmth and comfort.
In Okanogan in December, the precipitation amount is 63 mm (2.5 in) during a total of 11 days.
In Okanogan in December, the humidity is 93%. With an average temperature of -2°C (28°F), this humidity feels like a biting chill that seeps into your bones, making traveling feel uncomfortable and heavy as you contend with the dampness in the air, creating a stark contrast to the freezing temperatures.
In Okanogan 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 Okanogan, you can visit Hourly UV Index in Okanogan.
UV Risk Categories
Weather in Okanogan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Okanogan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 72 mm (2.8 inches) | 90% | low |
| February Weather | -2°C (28°F) | 48 mm (1.9 inches) | 91% | moderate |
| March Weather | 4°C (39°F) | 45 mm (1.8 inches) | 89% | moderate |
| April Weather | 9°C (48°F) | 34 mm (1.3 inches) | 85% | high |
| May Weather | 15°C (59°F) | 33 mm (1.3 inches) | 82% | very high |
| June Weather | 19°C (67°F) | 12 mm (0.5 inches) | 81% | very high |
| July Weather | 23°C (74°F) | 2 mm (0.1 inches) | 84% | very high |
| August Weather | 22°C (72°F) | 5 mm (0.2 inches) | 75% | very high |
| September Weather | 16°C (61°F) | 21 mm (0.8 inches) | 74% | high |
| October Weather | 8°C (46°F) | 39 mm (1.5 inches) | 85% | moderate |
| November Weather | 2°C (36°F) | 54 mm (2.1 inches) | 88% | moderate |
| December Weather | -2°C (28°F) | 63 mm (2.5 inches) | 93% | low |