Last updated: June 24, 2025
In Hagerstown, United States, the average temperature in December hovers around 3°C (38°F). Expect a minimum plunge to -12°C (10°F) and a maximum rise to 19°C (66°F). During this time, precipitation averages 95 mm (3.7 in) spread over 9 days, contributing to an average humidity of 85%. Keep these factors in mind as you plan your visit!
In December in Hagerstown, the average temperature is 3°C (38°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as -12°C (10°F). It's essential to prepare for a wide range of temperatures when planning your travels to Hagerstown during this time.
In Hagerstown in December, the precipitation amount is 95 mm (3.7 in) over the course of 9 days.
In Hagerstown in December, humidity is 85%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable as you contend with the heavy, cold air surrounding you.
In Hagerstown 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 Hagerstown, you can check the information here.
UV Risk Categories
Weather in Hagerstown varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hagerstown, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 1°C (34°F) | 62 mm (2.4 inches) | 86% | moderate |
February Weather | 3°C (38°F) | 94 mm (3.7 inches) | 86% | moderate |
March Weather | 6°C (44°F) | 88 mm (3.5 inches) | 86% | high |
April Weather | 12°C (54°F) | 101 mm (4.0 inches) | 84% | very high |
May Weather | 18°C (64°F) | 118 mm (4.7 inches) | 78% | very high |
June Weather | 23°C (73°F) | 90 mm (3.5 inches) | 79% | very high |
July Weather | 26°C (79°F) | 124 mm (4.9 inches) | 70% | very high |
August Weather | 24°C (76°F) | 87 mm (3.4 inches) | 59% | very high |
September Weather | 21°C (70°F) | 110 mm (4.3 inches) | 68% | very high |
October Weather | 15°C (60°F) | 104 mm (4.1 inches) | 80% | high |
November Weather | 7°C (45°F) | 81 mm (3.2 inches) | 86% | moderate |
December Weather | 3°C (38°F) | 95 mm (3.7 inches) | 85% | moderate |