Last updated: June 24, 2025
In Arlington, United States, the average temperature in December hovers around -2°C (28°F). However, you may experience a chillier side, with minimums plunging to -26°C (-15°F), while highs can reach a more comfortable 14°C (58°F). Expect 108 mm (4.2 in) of precipitation over about 13 days, contributing to a notably 84% humidity level in the air. Be prepared for a crisp and often damp winter experience!
In December in Arlington, the average temperature is -2°C (28°F). Maximums can reach 14°C (58°F), while minimums can drop as low as -26°C (-15°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and milder conditions.
In Arlington in December, the precipitation amount is 108 mm (4.2 in), spread across 13 days.
In Arlington in December humidity is 84%. With an average temperature of -2°C (28°F), this humidity feels like a biting chill that cuts through layers of clothing, making outdoor activities uncomfortable and travel challenging.
In Arlington 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 Arlington, you can visit Hourly UV Index in Arlington.
UV Risk Categories
Weather in Arlington varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Arlington, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 83 mm (3.3 inches) | 89% | moderate |
| February Weather | -3°C (26°F) | 100 mm (3.9 inches) | 88% | moderate |
| March Weather | 0°C (32°F) | 88 mm (3.5 inches) | 86% | high |
| April Weather | 7°C (45°F) | 131 mm (5.2 inches) | 84% | very high |
| May Weather | 14°C (57°F) | 102 mm (4.0 inches) | 76% | very high |
| June Weather | 19°C (66°F) | 87 mm (3.4 inches) | 72% | very high |
| July Weather | 22°C (71°F) | 120 mm (4.7 inches) | 66% | very high |
| August Weather | 21°C (69°F) | 93 mm (3.7 inches) | 64% | very high |
| September Weather | 17°C (62°F) | 96 mm (3.8 inches) | 72% | high |
| October Weather | 10°C (51°F) | 150 mm (5.9 inches) | 81% | high |
| November Weather | 2°C (37°F) | 112 mm (4.4 inches) | 87% | moderate |
| December Weather | -2°C (28°F) | 108 mm (4.2 inches) | 84% | low |