Last updated: June 24, 2025
In December, the average temperature in Arlington, United States hovers around -1°C (31°F). Weather extremes can vary significantly, with minimum temperatures dipping as low as -24°C (-11°F) and maximums reaching up to 21°C (70°F). Expect 41 mm (1.6 in) of precipitation over approximately 3 days, paired with an average humidity of around 83%. Stay prepared for a range of conditions!
In December in Arlington, the average temperature is -1°C (31°F), with maximums reaching 21°C (70°F) and minimums dropping as low as -24°C (-11°F). This climate makes Arlington a destination for travelers seeking both winter sports and mild weather experiences.
In Arlington in December, the precipitation amount is 41 mm (1.6 in) over the course of 3 days.
In Arlington in December humidity is 83%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, icy blanket enveloping you, making each step outside feel like a struggle against the cold, damp air that clings to your skin, often leaving you wishing for warmth and refuge indoors.
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 | -4°C (25°F) | 32 mm (1.2 inches) | 76% | moderate |
| February Weather | -4°C (25°F) | 30 mm (1.2 inches) | 80% | moderate |
| March Weather | 5°C (41°F) | 92 mm (3.6 inches) | 73% | high |
| April Weather | 10°C (50°F) | 59 mm (2.3 inches) | 74% | very high |
| May Weather | 17°C (63°F) | 151 mm (6.0 inches) | 78% | very high |
| June Weather | 24°C (76°F) | 123 mm (4.8 inches) | 82% | very high |
| July Weather | 25°C (78°F) | 68 mm (2.7 inches) | 83% | very high |
| August Weather | 23°C (74°F) | 103 mm (4.1 inches) | 80% | very high |
| September Weather | 21°C (69°F) | 79 mm (3.1 inches) | 75% | very high |
| October Weather | 11°C (53°F) | 105 mm (4.1 inches) | 75% | high |
| November Weather | 4°C (40°F) | 30 mm (1.2 inches) | 82% | moderate |
| December Weather | -1°C (31°F) | 41 mm (1.6 inches) | 83% | low |