Last updated: June 24, 2025
In December, the average temperature in Wallowa, United States hovers around -4°C (26°F), but can vary significantly, with minimums plummeting to -20°C (-4°F) and maximums reaching up to 12°C (54°F). Expect 101 mm (4.0 in) of precipitation spread over 17 days, coupled with an average humidity level of 87%, creating a chilly and damp atmosphere.
In December in Wallowa, the average temperature is -4°C (26°F). Maximums can reach 12°C (54°F), while minimums can drop as low as -20°C (-4°F). Be prepared for a range of weather conditions if you plan to travel during this time.
In Wallowa in December, the total precipitation amount is 101 mm (4.0 in) over the course of 17 days.
In Wallowa in December humidity is 87%. With average temperature -4°C (26°F), this humidity feels like an icy blanket enveloping you, making outdoor activities challenging and rendering those brisk air moments difficult to bear, as the cold moisture seeps into your clothing and chills you to the bone.
In Wallowa 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 Wallowa, you can visit Hourly UV Index in Wallowa.
UV Risk Categories
Weather in Wallowa varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Wallowa, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 90 mm (3.6 inches) | 86% | moderate |
| February Weather | -3°C (26°F) | 147 mm (5.8 inches) | 86% | moderate |
| March Weather | 1°C (33°F) | 107 mm (4.2 inches) | 85% | high |
| April Weather | 3°C (38°F) | 93 mm (3.6 inches) | 83% | very high |
| May Weather | 8°C (46°F) | 93 mm (3.7 inches) | 77% | very high |
| June Weather | 13°C (56°F) | 60 mm (2.4 inches) | 81% | very high |
| July Weather | 19°C (66°F) | 11 mm (0.4 inches) | 76% | very high |
| August Weather | 18°C (65°F) | 34 mm (1.3 inches) | 60% | very high |
| September Weather | 13°C (55°F) | 45 mm (1.8 inches) | 58% | very high |
| October Weather | 5°C (41°F) | 79 mm (3.1 inches) | 75% | moderate |
| November Weather | 0°C (32°F) | 90 mm (3.5 inches) | 85% | moderate |
| December Weather | -4°C (26°F) | 101 mm (4.0 inches) | 87% | low |