Last updated: June 24, 2025
In December, the average temperature in Marcus Hook, United States is a crisp 4°C (40°F). Visitors can expect a chilly minimum of -11°C (13°F), while the mercury may reach as high as 19°C (66°F). Precipitation is moderate, with about 100 mm (3.9 in) spread over 9 days, alongside a notable average humidity of 84%.
In December in Marcus Hook, the average temperature is 4°C (40°F). The maximum can reach 19°C (66°F), and the minimum can be as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures, so dressing in layers is advisable.
In Marcus Hook in December, the precipitation amount is 100 mm (3.9 in) spread over 9 days.
In Marcus Hook in December, humidity is 84%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.
In Marcus Hook 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 Marcus Hook, you can check the information here.
UV Risk Categories
Weather in Marcus Hook varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Marcus Hook, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 2°C (36°F) | 64 mm (2.5 inches) | 84% | moderate |
February Weather | 4°C (39°F) | 103 mm (4.1 inches) | 83% | moderate |
March Weather | 7°C (45°F) | 106 mm (4.2 inches) | 83% | high |
April Weather | 13°C (55°F) | 105 mm (4.1 inches) | 81% | very high |
May Weather | 18°C (65°F) | 135 mm (5.3 inches) | 78% | very high |
June Weather | 23°C (74°F) | 118 mm (4.7 inches) | 79% | very high |
July Weather | 26°C (79°F) | 136 mm (5.4 inches) | 74% | very high |
August Weather | 25°C (77°F) | 140 mm (5.5 inches) | 72% | very high |
September Weather | 22°C (71°F) | 100 mm (3.9 inches) | 75% | very high |
October Weather | 16°C (61°F) | 109 mm (4.3 inches) | 81% | high |
November Weather | 8°C (47°F) | 83 mm (3.3 inches) | 85% | moderate |
December Weather | 4°C (40°F) | 100 mm (3.9 inches) | 84% | moderate |