Last updated: June 24, 2025
In December, the average temperature in Delaware City, United States hovers around 5°C (41°F). Expect a chilly range with minimums dropping to -10°C (13°F) and maximums reaching up to 19°C (67°F). The weather can be quite wet, bringing an average of 97 mm (3.8 in) of precipitation over 9 days, accompanied by a high humidity level of 84%. Stay prepared for a mix of cold and damp conditions!
In December in Delaware City, the average temperature is 5°C (41°F). Maximum temperatures can reach up to 19°C (67°F), while minimums can drop as low as -10°C (13°F). Visitors should be prepared for a wide range of temperatures when traveling to Delaware City during this time.
In Delaware City in December, the total precipitation amount reaches 97 mm (3.8 in) over the course of 9 days.
In Delaware City 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 Delaware City 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 Delaware City, you can check the information here.
UV Risk Categories
Weather in Delaware City varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Delaware City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 60 mm (2.4 inches) | 84% | moderate |
| February Weather | 4°C (40°F) | 98 mm (3.9 inches) | 83% | moderate |
| March Weather | 8°C (46°F) | 103 mm (4.1 inches) | 83% | high |
| April Weather | 13°C (56°F) | 100 mm (3.9 inches) | 81% | very high |
| May Weather | 18°C (65°F) | 131 mm (5.2 inches) | 78% | very high |
| June Weather | 24°C (75°F) | 108 mm (4.2 inches) | 79% | very high |
| July Weather | 27°C (80°F) | 135 mm (5.3 inches) | 74% | very high |
| August Weather | 25°C (78°F) | 151 mm (6.0 inches) | 72% | very high |
| September Weather | 22°C (72°F) | 96 mm (3.8 inches) | 75% | very high |
| October Weather | 17°C (62°F) | 111 mm (4.4 inches) | 81% | high |
| November Weather | 9°C (48°F) | 80 mm (3.2 inches) | 85% | moderate |
| December Weather | 5°C (41°F) | 97 mm (3.8 inches) | 84% | moderate |