Last updated: June 24, 2025
In Grasonville, United States, the average temperature in December hovers around 6°C (42°F). During this month, temperatures can range from a chilly -7°C (20°F) at their lowest to a mild 16°C (60°F) at their peak. Expect approximately 130 mm (5.1 in) of precipitation over about 10 days, contributing to an average humidity of 84%. Stay prepared for a mix of cool conditions and potential rain!
In December in Grasonville, the average temperature is 6°C (42°F), with maximums reaching up to 16°C (60°F) and minimums dropping as low as -7°C (20°F). Travelers should be prepared for a mix of chilly and mild days, so layering is advisable for comfort during outdoor activities.
In Grasonville in December, the precipitation amount is 130 mm (5.1 in) over a period of 10 days.
In Grasonville in December humidity is 84%. With an average temperature of 6°C (42°F), this humidity feels like an uncomfortable chill that seeps into your bones, making travel less enjoyable as you find yourself bundled up yet still damp, longing for warmth and comfort.
In Grasonville 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 Grasonville, you can check the information here.
UV Risk Categories
Weather in Grasonville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grasonville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 79 mm (3.1 inches) | 84% | moderate |
| February Weather | 4°C (39°F) | 136 mm (5.3 inches) | 83% | moderate |
| March Weather | 7°C (45°F) | 106 mm (4.2 inches) | 83% | high |
| April Weather | 12°C (54°F) | 112 mm (4.4 inches) | 81% | very high |
| May Weather | 18°C (64°F) | 139 mm (5.5 inches) | 78% | very high |
| June Weather | 23°C (74°F) | 83 mm (3.3 inches) | 79% | very high |
| July Weather | 27°C (80°F) | 143 mm (5.6 inches) | 74% | very high |
| August Weather | 26°C (79°F) | 136 mm (5.3 inches) | 72% | very high |
| September Weather | 23°C (74°F) | 118 mm (4.6 inches) | 75% | very high |
| October Weather | 18°C (65°F) | 138 mm (5.4 inches) | 81% | high |
| November Weather | 10°C (50°F) | 96 mm (3.8 inches) | 85% | moderate |
| December Weather | 6°C (42°F) | 130 mm (5.1 inches) | 84% | moderate |