Last updated: June 24, 2025
In December, the average temperature in Arlington, United States hovers around 2°C (36°F). This chilly month can see temperatures dip to a brisk -13°C (9°F), while a warmer day might reach a comfortable 18°C (64°F). Expect about 51 mm (2.0 in) of precipitation spread over 11 days, contributing to an average humidity of 88%.
In December in Arlington, the average temperature is 2°C (36°F). Maximum temperatures can reach 18°C (64°F), while minimums can drop as low as -13°C (9°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.
In Arlington in December, the precipitation amount is 51 mm (2.0 in) spread over 11 days.
In Arlington in December, humidity is 88%. With an average temperature of 2°C (36°F), this humidity feels like a cold, damp blanket wrapping around you, making traveling uncomfortable and energy-draining as every step through the chill seems heavier in the thick air.
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 | 2°C (36°F) | 48 mm (1.9 inches) | 86% | low |
| February Weather | 3°C (37°F) | 58 mm (2.3 inches) | 87% | moderate |
| March Weather | 7°C (45°F) | 31 mm (1.2 inches) | 86% | moderate |
| April Weather | 11°C (52°F) | 30 mm (1.2 inches) | 85% | high |
| May Weather | 16°C (62°F) | 18 mm (0.7 inches) | 80% | very high |
| June Weather | 21°C (69°F) | 8 mm (0.3 inches) | 82% | very high |
| July Weather | 25°C (77°F) | 1 mm (0.0 inches) | 78% | very high |
| August Weather | 25°C (77°F) | 4 mm (0.2 inches) | 62% | very high |
| September Weather | 19°C (67°F) | 12 mm (0.5 inches) | 59% | very high |
| October Weather | 11°C (53°F) | 28 mm (1.1 inches) | 78% | moderate |
| November Weather | 6°C (43°F) | 40 mm (1.6 inches) | 88% | moderate |
| December Weather | 2°C (36°F) | 51 mm (2.0 inches) | 88% | low |