Last updated: June 24, 2025
In Cabin John, United States, the average temperature in December hovers around 5°C (41°F). Expect chilly days, with minimum temperatures dipping to -11°C (13°F) and occasionally reaching a maximum of 20°C (68°F). During this month, you can anticipate 94 mm (3.7 in) of precipitation over approximately 9 days, paired with an average humidity level of 84%. Prepare for a mix of cool and damp weather!
In December in Cabin John, the average temperature is 5°C (41°F). Maximum temperatures can reach 20°C (68°F), while minimums can drop as low as -11°C (13°F). Be prepared for a mix of mild and cold weather during your travels, so pack accordingly!
In Cabin John in December, the precipitation amount reaches 94 mm (3.7 in) over the course of 9 days.
In Cabin John in December humidity is 84%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as you navigate through the cold, heavy air that clings to your skin.
In Cabin John in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Cabin John, you can check the information here.
UV Risk Categories
Weather in Cabin John varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cabin John, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (37°F) | 60 mm (2.4 inches) | 84% | moderate |
| February Weather | 5°C (41°F) | 98 mm (3.9 inches) | 83% | moderate |
| March Weather | 8°C (46°F) | 84 mm (3.3 inches) | 83% | high |
| April Weather | 13°C (57°F) | 99 mm (3.9 inches) | 81% | very high |
| May Weather | 19°C (66°F) | 132 mm (5.2 inches) | 78% | very high |
| June Weather | 24°C (75°F) | 118 mm (4.7 inches) | 79% | very high |
| July Weather | 27°C (81°F) | 141 mm (5.5 inches) | 74% | very high |
| August Weather | 25°C (77°F) | 150 mm (5.9 inches) | 72% | very high |
| September Weather | 22°C (72°F) | 102 mm (4.0 inches) | 75% | very high |
| October Weather | 16°C (62°F) | 107 mm (4.2 inches) | 81% | high |
| November Weather | 8°C (47°F) | 86 mm (3.4 inches) | 85% | moderate |
| December Weather | 5°C (41°F) | 94 mm (3.7 inches) | 84% | moderate |