Last updated: June 24, 2025
In December, the average temperature in Tinicum, United States hovers around 3°C (38°F), offering a brisk climate. Expect chilly nights with a minimum temperature of -12°C (10°F), while daytime highs can reach a comfortable 18°C (65°F). This month also brings 105 mm (4.1 in) of precipitation over approximately 10 days, contributing to an average humidity of 85%, making it a notably damp time of year.
In December in Tinicum, the average temperature is 3°C (38°F). The maximum can reach 18°C (65°F) and the minimum can be as low as -12°C (10°F). It's essential to prepare for a wide range of temperatures when traveling during this time.
In Tinicum in December, the precipitation amount is 105 mm (4.1 in) over the course of 10 days.
In Tinicum 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 Tinicum in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Tinicum, you can visit Hourly UV Index in Tinicum.
UV Risk Categories
Weather in Tinicum varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Tinicum, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 69 mm (2.7 inches) | 87% | moderate |
| February Weather | 2°C (37°F) | 105 mm (4.1 inches) | 85% | moderate |
| March Weather | 5°C (42°F) | 107 mm (4.2 inches) | 85% | high |
| April Weather | 11°C (52°F) | 104 mm (4.1 inches) | 83% | very high |
| May Weather | 17°C (62°F) | 135 mm (5.3 inches) | 75% | very high |
| June Weather | 22°C (71°F) | 104 mm (4.1 inches) | 73% | very high |
| July Weather | 25°C (77°F) | 140 mm (5.5 inches) | 65% | very high |
| August Weather | 24°C (75°F) | 149 mm (5.9 inches) | 62% | very high |
| September Weather | 20°C (69°F) | 96 mm (3.8 inches) | 66% | very high |
| October Weather | 15°C (59°F) | 117 mm (4.6 inches) | 79% | high |
| November Weather | 7°C (45°F) | 84 mm (3.3 inches) | 87% | moderate |
| December Weather | 3°C (38°F) | 105 mm (4.1 inches) | 85% | low |