Last updated: June 24, 2025
In Anacortes, United States, the average temperature for December hovers around 5°C (41°F), with extremes ranging from a chilly -12°C (11°F) to a mild 13°C (55°F). This month, expect about 199 mm (7.8 in) of precipitation over 18 days, paired with a high average humidity of 87%. Prepare for a cool and wet experience!
In December in Anacortes, the average temperature is 5°C (41°F). Maximum temperatures can reach 13°C (55°F), while the minimum can drop as low as -12°C (11°F). Travelers should be prepared for chilly weather and varying conditions during this time.
In Anacortes in December, the precipitation amount is 199 mm (7.8 in) over the course of 18 days.
In Anacortes in December humidity is 87%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket enveloping you, making every step seem laborious and the chill more biting, which can be quite challenging for traveling.
In Anacortes 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 Anacortes, you can visit Hourly UV Index in Anacortes.
UV Risk Categories
Weather in Anacortes varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Anacortes, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 171 mm (6.7 inches) | 86% | low |
| February Weather | 4°C (40°F) | 175 mm (6.9 inches) | 85% | moderate |
| March Weather | 7°C (44°F) | 137 mm (5.4 inches) | 86% | moderate |
| April Weather | 9°C (49°F) | 102 mm (4.0 inches) | 86% | high |
| May Weather | 12°C (55°F) | 61 mm (2.4 inches) | 81% | very high |
| June Weather | 15°C (59°F) | 52 mm (2.0 inches) | 83% | very high |
| July Weather | 17°C (63°F) | 21 mm (0.8 inches) | 84% | very high |
| August Weather | 18°C (64°F) | 18 mm (0.7 inches) | 77% | very high |
| September Weather | 15°C (60°F) | 112 mm (4.4 inches) | 76% | high |
| October Weather | 11°C (51°F) | 166 mm (6.5 inches) | 88% | moderate |
| November Weather | 8°C (46°F) | 226 mm (8.9 inches) | 87% | low |
| December Weather | 5°C (41°F) | 199 mm (7.8 inches) | 87% | low |