Last updated: June 24, 2025
In Charles City, United States, the average temperature in December hovers around -2°C (28°F). Expect occasional extremes, with minimum temperatures plummeting to -22°C (-7°F) and maximums reaching a balmy 21°C (70°F). During this month, you'll likely encounter 37 mm (1.4 in) of precipitation spread over approximately 5 days, contributing to an average humidity of a notable 83%.
In December in Charles City, the average temperature is -2°C (28°F). Maximum temperatures can reach 21°C (70°F), while minimums can drop to as low as -22°C (-7°F). Therefore, travelers should be well-prepared for a wide range of weather conditions during their visit.
In Charles City in December, the precipitation amount is 37 mm (1.4 in) spread over a duration of 5 days.
In Charles City in December, humidity is 83%. With an average temperature of -2°C (28°F), this humidity feels like a biting chill that penetrates your clothes, making outdoor activities uncomfortable and travel challenging.
In Charles 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 Charles City, you can check the information here.
UV Risk Categories
Weather in Charles City varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Charles City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (19°F) | 38 mm (1.5 inches) | 82% | moderate |
| February Weather | -7°C (19°F) | 48 mm (1.9 inches) | 84% | moderate |
| March Weather | 2°C (36°F) | 72 mm (2.8 inches) | 80% | moderate |
| April Weather | 8°C (46°F) | 74 mm (2.9 inches) | 81% | very high |
| May Weather | 16°C (60°F) | 159 mm (6.3 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 123 mm (4.8 inches) | 80% | extreme |
| July Weather | 23°C (74°F) | 91 mm (3.6 inches) | 80% | very high |
| August Weather | 21°C (71°F) | 116 mm (4.6 inches) | 77% | very high |
| September Weather | 19°C (66°F) | 105 mm (4.1 inches) | 75% | very high |
| October Weather | 10°C (50°F) | 128 mm (5.0 inches) | 80% | moderate |
| November Weather | 2°C (35°F) | 49 mm (1.9 inches) | 87% | moderate |
| December Weather | -2°C (28°F) | 37 mm (1.4 inches) | 83% | moderate |