Last updated: June 24, 2025
In December, the average temperature in Astoria, United States hovers around 2°C (35°F), with a notable range from a chilly -20°C (-4°F) to a mild 21°C (71°F). Expect a total precipitation of 51 mm (2.0 in) over approximately 7 days, contributing to an average humidity level of 84%. Whether bundling up against the cold or enjoying the warmer days, this month offers a unique climate experience!
In December in Astoria, the average temperature is 2°C (35°F). Maximums can reach 21°C (71°F) and minimums can drop to as low as -20°C (-4°F). Be prepared for a wide range of temperatures during your visit, so pack accordingly!
In Astoria in December, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.
In Astoria in December, humidity is 84%. With an average temperature of 2°C (35°F), this humidity feels like an uncomfortable chill that penetrates your bones, making outdoor travel quite brisk and uninviting.
In Astoria 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 Astoria, you can visit Hourly UV Index in Astoria.
UV Risk Categories
Weather in Astoria varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Astoria, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 62 mm (2.4 inches) | 81% | moderate |
| February Weather | -1°C (31°F) | 66 mm (2.6 inches) | 81% | moderate |
| March Weather | 6°C (43°F) | 127 mm (5.0 inches) | 81% | high |
| April Weather | 11°C (52°F) | 110 mm (4.3 inches) | 82% | very high |
| May Weather | 18°C (65°F) | 164 mm (6.5 inches) | 78% | very high |
| June Weather | 24°C (75°F) | 135 mm (5.3 inches) | 81% | extreme |
| July Weather | 25°C (78°F) | 103 mm (4.0 inches) | 79% | very high |
| August Weather | 24°C (75°F) | 89 mm (3.5 inches) | 77% | very high |
| September Weather | 21°C (71°F) | 71 mm (2.8 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 108 mm (4.3 inches) | 78% | high |
| November Weather | 5°C (41°F) | 59 mm (2.3 inches) | 87% | moderate |
| December Weather | 2°C (35°F) | 51 mm (2.0 inches) | 84% | low |