Last updated: June 24, 2025
In December, the average temperature in Irrigon, United States hovers around 3°C (37°F), making it a cool yet inviting destination. Temperatures can dip as low as -8°C (18°F) at their minimum and reach a comfortable 20°C (68°F) at their peak. However, be prepared for some rain, as precipitation averages about 30 mm (1.2 in) over the course of 7 days. With an average humidity of 87%, don't forget to pack your favorite layers for a cozy experience!
In December in Irrigon, the average temperature is 3°C (37°F). Maximums can reach 20°C (68°F), while minimums can be as low as -8°C (18°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their time in Irrigon.
In Irrigon in December, the total precipitation amount is 30 mm (1.2 in) over a span of 7 days.
In Irrigon in December, humidity is 87%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating proper layers to stay warm while navigating the wet conditions.
In Irrigon 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 Irrigon, you can visit Hourly UV Index in Irrigon.
UV Risk Categories
Weather in Irrigon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Irrigon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (37°F) | 33 mm (1.3 inches) | 86% | low |
| February Weather | 3°C (38°F) | 39 mm (1.5 inches) | 86% | moderate |
| March Weather | 8°C (47°F) | 24 mm (0.9 inches) | 85% | moderate |
| April Weather | 13°C (56°F) | 19 mm (0.7 inches) | 83% | high |
| May Weather | 19°C (66°F) | 13 mm (0.5 inches) | 77% | very high |
| June Weather | 23°C (74°F) | 7 mm (0.3 inches) | 81% | very high |
| July Weather | 27°C (81°F) | 0 mm (0.0 inches) | 76% | very high |
| August Weather | 27°C (80°F) | 2 mm (0.1 inches) | 60% | very high |
| September Weather | 21°C (69°F) | 8 mm (0.3 inches) | 58% | high |
| October Weather | 13°C (55°F) | 22 mm (0.9 inches) | 75% | moderate |
| November Weather | 6°C (44°F) | 29 mm (1.1 inches) | 85% | moderate |
| December Weather | 3°C (37°F) | 30 mm (1.2 inches) | 87% | low |