Last updated: June 24, 2025
In December, the average temperature in Jacksonville, United States hovers around 12°C (54°F), with a notable range where the minimum dips to -2°C (28°F) and the maximum peaks at 28°C (83°F). Expect 115 mm (4.5 in) of precipitation spread over 8 days, resulting in a relatively high average humidity of 87%. Whether you're enjoying the mild temperatures or navigating the rainy days, be prepared for the unique climate of this vibrant locale!
In December in Jacksonville, the average temperature is 12°C (54°F), with maximums reaching up to 28°C (83°F) and minimums dropping as low as -2°C (28°F). Be prepared for a wide range of temperatures when traveling to Jacksonville during this time.
In Jacksonville in December, the precipitation amount is 115 mm (4.5 in) over the course of 8 days.
In Jacksonville in December humidity is 87%. With an average temperature of 12°C (54°F), this humidity feels like a damp embrace, making it quite uncomfortable for traveling, as the air feels heavy and can quickly sap your energy as you explore the sights.
In Jacksonville in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Jacksonville for better planning.
UV Risk Categories
Weather in Jacksonville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Jacksonville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (49°F) | 109 mm (4.3 inches) | 79% | moderate |
| February Weather | 11°C (52°F) | 140 mm (5.5 inches) | 80% | high |
| March Weather | 16°C (62°F) | 119 mm (4.7 inches) | 78% | very high |
| April Weather | 19°C (66°F) | 132 mm (5.2 inches) | 79% | very high |
| May Weather | 24°C (75°F) | 148 mm (5.8 inches) | 81% | extreme |
| June Weather | 27°C (81°F) | 100 mm (4.0 inches) | 77% | extreme |
| July Weather | 29°C (85°F) | 79 mm (3.1 inches) | 71% | extreme |
| August Weather | 29°C (85°F) | 79 mm (3.1 inches) | 67% | extreme |
| September Weather | 26°C (80°F) | 85 mm (3.3 inches) | 69% | very high |
| October Weather | 21°C (70°F) | 111 mm (4.4 inches) | 73% | very high |
| November Weather | 14°C (58°F) | 65 mm (2.5 inches) | 82% | high |
| December Weather | 12°C (54°F) | 115 mm (4.5 inches) | 87% | moderate |