Last updated: June 24, 2025
In Truro, United States, the average temperature in December hovers around 5°C (41°F). Expect temperatures to dip as low as -10°C (15°F) and rise to a comfortable 15°C (60°F). This month typically brings 138 mm (5.4 in) of precipitation spread over 13 days, resulting in an average humidity of approximately 80%. Stay prepared for a mix of chilly temperatures and wet conditions!
In December in Truro, the average temperature is 5°C (41°F). Maximum temperatures can reach 15°C (60°F), while minimums can dip as low as -10°C (15°F). Be prepared for a wide range of weather conditions while traveling during this time.
In Truro in December, the precipitation amount is 138 mm (5.4 in) over the course of 13 days.
In Truro in December humidity is 80%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much colder than it actually is, leading to the necessity of layering up to stay comfortable while traveling.
In Truro in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Truro, you can visit Hourly UV Index in Truro.
UV Risk Categories
Weather in Truro varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Truro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (37°F) | 95 mm (3.7 inches) | 84% | low |
| February Weather | 2°C (37°F) | 117 mm (4.6 inches) | 84% | moderate |
| March Weather | 3°C (38°F) | 119 mm (4.7 inches) | 82% | moderate |
| April Weather | 7°C (44°F) | 130 mm (5.1 inches) | 79% | very high |
| May Weather | 11°C (51°F) | 106 mm (4.2 inches) | 75% | very high |
| June Weather | 16°C (61°F) | 88 mm (3.5 inches) | 78% | very high |
| July Weather | 20°C (69°F) | 84 mm (3.3 inches) | 76% | very high |
| August Weather | 21°C (70°F) | 74 mm (2.9 inches) | 76% | very high |
| September Weather | 19°C (66°F) | 110 mm (4.3 inches) | 75% | very high |
| October Weather | 15°C (58°F) | 161 mm (6.3 inches) | 75% | high |
| November Weather | 9°C (48°F) | 105 mm (4.2 inches) | 80% | moderate |
| December Weather | 5°C (41°F) | 138 mm (5.4 inches) | 80% | low |