Last updated: June 24, 2025
In December, the average temperature in Charles City, United States hovers around 7°C (45°F). Expect chilly days with minimums dipping to -9°C (17°F) and pleasant highs reaching up to 23°C (73°F). Over the course of the month, precipitation amounts to 88 mm (3.5 in) across 9 days, while the average humidity remains high at 84%.
In December in Charles City, the average temperature is 7°C (45°F), with maximums reaching 23°C (73°F) and minimums dropping as low as -9°C (17°F). This range makes it important to pack layers to stay comfortable during your travels.
In Charles City in December, the precipitation amount is 88 mm (3.5 in) over the course of 9 days.
In Charles City in December, humidity is 84%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm while exploring the sights.
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 | 5°C (41°F) | 82 mm (3.2 inches) | 84% | moderate |
| February Weather | 8°C (46°F) | 103 mm (4.0 inches) | 83% | high |
| March Weather | 10°C (51°F) | 86 mm (3.4 inches) | 82% | high |
| April Weather | 16°C (60°F) | 103 mm (4.0 inches) | 81% | very high |
| May Weather | 20°C (69°F) | 107 mm (4.2 inches) | 80% | very high |
| June Weather | 24°C (76°F) | 113 mm (4.5 inches) | 82% | very high |
| July Weather | 27°C (81°F) | 119 mm (4.7 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 155 mm (6.1 inches) | 81% | very high |
| September Weather | 23°C (74°F) | 108 mm (4.2 inches) | 78% | very high |
| October Weather | 18°C (65°F) | 116 mm (4.6 inches) | 80% | very high |
| November Weather | 10°C (51°F) | 78 mm (3.1 inches) | 84% | moderate |
| December Weather | 7°C (45°F) | 88 mm (3.5 inches) | 84% | moderate |