Last updated: June 24, 2025
In December, the average temperature in Casselberry, United States hovers around 17°C (63°F). However, temperatures can vary significantly, dipping to a chilly 1°C (34°F) at their lowest and soaring to a warm 30°C (86°F) at their peak. During this month, the region typically experiences about 62 mm (2.4 in) of precipitation spread over 7 days, coupled with a relatively high average humidity of 84%.
In December in Casselberry, the average temperature is 17°C (63°F). The maximum can reach 30°C (86°F) and the minimum can be as low as 1°C (34°F). It's a vibrant time to visit, offering a pleasant blend of warm days and cooler evenings.
In Casselberry in December, the total precipitation amount is 62 mm (2.4 in) observed over a span of 7 days.
In Casselberry in December, humidity is 84%. With an average temperature of 17°C (63°F), this humidity feels like a warm, sticky embrace that can make traveling feel heavy and cumbersome, often leaving visitors yearning for refreshing breezes and shade.
In Casselberry in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Casselberry.
UV Risk Categories
Weather in Casselberry varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Casselberry, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (61°F) | 37 mm (1.5 inches) | 83% | moderate |
| February Weather | 19°C (66°F) | 56 mm (2.2 inches) | 80% | very high |
| March Weather | 20°C (68°F) | 25 mm (1.0 inches) | 75% | very high |
| April Weather | 22°C (72°F) | 75 mm (3.0 inches) | 70% | extreme |
| May Weather | 25°C (77°F) | 107 mm (4.2 inches) | 68% | extreme |
| June Weather | 27°C (81°F) | 199 mm (7.9 inches) | 75% | extreme |
| July Weather | 27°C (82°F) | 216 mm (8.5 inches) | 79% | extreme |
| August Weather | 28°C (82°F) | 222 mm (8.7 inches) | 81% | extreme |
| September Weather | 27°C (81°F) | 165 mm (6.5 inches) | 83% | extreme |
| October Weather | 25°C (77°F) | 82 mm (3.2 inches) | 81% | very high |
| November Weather | 20°C (69°F) | 44 mm (1.7 inches) | 82% | high |
| December Weather | 17°C (63°F) | 62 mm (2.4 inches) | 84% | moderate |