Last updated: June 24, 2025
In December, the average temperature in Westbrook, United States hovers around -4°C (25°F). This month can bring a chilly range, with minimums dipping to -25°C (-13°F) and maximums reaching up to 16°C (61°F). Expect 42 mm (1.6 in) of precipitation over approximately 4 days, accompanied by a high average humidity of 83%. Stay warm and prepared!
In December in Westbrook, the average temperature is -4°C (25°F). Maximum temperatures can reach 16°C (61°F), while minimums can drop as low as -25°C (-13°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and mild weather.
In Westbrook in December, the precipitation amount is 42 mm (1.6 in) spread over a period of 4 days.
In Westbrook in December, humidity is 83%. With an average temperature of -4°C (25°F), this humidity feels like a chilling fog enveloping you, making every breath feel heavy and damp, which can quickly dampen the spirit of travel as you navigate the frosty landscape.
In Westbrook 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 Westbrook, you can visit Hourly UV Index in Westbrook.
UV Risk Categories
Weather in Westbrook varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Westbrook, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (17°F) | 29 mm (1.1 inches) | 80% | moderate |
| February Weather | -9°C (17°F) | 28 mm (1.1 inches) | 84% | moderate |
| March Weather | 0°C (33°F) | 66 mm (2.6 inches) | 75% | high |
| April Weather | 6°C (43°F) | 86 mm (3.4 inches) | 79% | very high |
| May Weather | 15°C (59°F) | 127 mm (5.0 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 124 mm (4.9 inches) | 81% | very high |
| July Weather | 23°C (74°F) | 119 mm (4.7 inches) | 82% | very high |
| August Weather | 21°C (70°F) | 124 mm (4.9 inches) | 80% | very high |
| September Weather | 18°C (64°F) | 110 mm (4.3 inches) | 75% | very high |
| October Weather | 9°C (48°F) | 96 mm (3.8 inches) | 77% | moderate |
| November Weather | 1°C (34°F) | 31 mm (1.2 inches) | 85% | moderate |
| December Weather | -4°C (25°F) | 42 mm (1.6 inches) | 83% | low |