Last updated: June 24, 2025
In Arlington, United States, the average temperature in December hovers around -4°C (25°F). Be prepared for chilly extremes, as temperatures can drop to a minimum of -25°C (-13°F), while reaching a comfortable maximum of 14°C (58°F). During this month, expect around 32 mm (1.3 in) of precipitation spread over 4 days, with an average humidity level of 84%. Stay warm and dry!
In December in Arlington, the average temperature is -4°C (25°F). Maximum temperatures can reach 14°C (58°F), while the minimum can drop as low as -25°C (-13°F). Travelers should be prepared for a wide range of temperatures and dress in layers for comfort.
In Arlington in December, the total precipitation amount is 32 mm (1.3 in), accumulated over a period of 4 days.
In Arlington in December, humidity is 84%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.
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 | -8°C (17°F) | 20 mm (0.8 inches) | 85% | moderate |
| February Weather | -9°C (17°F) | 20 mm (0.8 inches) | 89% | moderate |
| March Weather | 0°C (33°F) | 59 mm (2.3 inches) | 81% | moderate |
| April Weather | 6°C (42°F) | 75 mm (2.9 inches) | 82% | very high |
| May Weather | 14°C (57°F) | 93 mm (3.7 inches) | 76% | very high |
| June Weather | 22°C (71°F) | 74 mm (2.9 inches) | 81% | very high |
| July Weather | 23°C (74°F) | 102 mm (4.0 inches) | 82% | very high |
| August Weather | 21°C (71°F) | 106 mm (4.2 inches) | 83% | very high |
| September Weather | 18°C (64°F) | 98 mm (3.8 inches) | 82% | very high |
| October Weather | 8°C (47°F) | 75 mm (2.9 inches) | 82% | moderate |
| November Weather | 1°C (34°F) | 25 mm (1.0 inches) | 87% | moderate |
| December Weather | -4°C (25°F) | 32 mm (1.3 inches) | 84% | low |