Last updated: June 24, 2025
In December, the average temperature in Bristol, United States is a mild 13°C (56°F). However, it's worth noting that temperatures can vary significantly, with a minimum dipping to -4°C (25°F) and a maximum soaring to 27°C (81°F). Expect 126 mm (5.0 in) of precipitation spread over 9 days, contributing to an average humidity level of 86%. Whether you're bracing for chilly mornings or warm afternoons, be prepared for the diverse weather this month has to offer!
In December, in Bristol, the average temperature is 13°C (56°F). Maximums can reach 27°C (81°F), while minimums can dip as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures and pack appropriately for both warm and cool conditions.
In Bristol in December, the precipitation amount is 126 mm (5.0 in) spread over 9 days.
In Bristol in December, humidity is 86%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or air-conditioned spaces frequently.
In Bristol 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 Bristol for better planning.
UV Risk Categories
Weather in Bristol varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Bristol, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 12°C (54°F) | 84 mm (3.3 inches) | 83% | moderate |
| February Weather | 15°C (60°F) | 122 mm (4.8 inches) | 82% | very high |
| March Weather | 17°C (64°F) | 57 mm (2.2 inches) | 79% | very high |
| April Weather | 20°C (68°F) | 107 mm (4.2 inches) | 77% | very high |
| May Weather | 24°C (75°F) | 103 mm (4.1 inches) | 74% | extreme |
| June Weather | 26°C (80°F) | 181 mm (7.1 inches) | 70% | extreme |
| July Weather | 27°C (81°F) | 173 mm (6.8 inches) | 78% | extreme |
| August Weather | 27°C (81°F) | 191 mm (7.5 inches) | 78% | extreme |
| September Weather | 26°C (79°F) | 152 mm (6.0 inches) | 79% | very high |
| October Weather | 23°C (73°F) | 100 mm (3.9 inches) | 74% | very high |
| November Weather | 16°C (60°F) | 46 mm (1.8 inches) | 83% | high |
| December Weather | 13°C (56°F) | 126 mm (5.0 inches) | 86% | moderate |