Last updated: June 24, 2025
In December, the average temperature in Millbury, United States hovers around 0°C (33°F), with minimums plummeting to -20°C (-5°F) and maximums reaching a mild 17°C (62°F). Expect about 123 mm (4.9 in) of precipitation spread over 10 days, contributing to an average humidity of 81%, making for a notably chilly and damp month.
In December in Millbury, the average temperature is 0°C (33°F). The maximum can reach 17°C (62°F), while the minimum can drop as low as -20°C (-5°F). Travelers should be prepared for a wide range of temperatures and dress accordingly to enjoy their visit.
In Millbury in December, the total precipitation amount is 123 mm (4.9 in) over the course of 10 days.
In Millbury in December, humidity is 81%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill enveloping you, making travel uncomfortable and the air heavy, leaving you craving warmth and dry conditions.
In Millbury 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 Millbury, you can visit Hourly UV Index in Millbury.
UV Risk Categories
Weather in Millbury varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Millbury, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -2°C (29°F) | 72 mm (2.8 inches) | 86% | moderate |
February Weather | 0°C (32°F) | 88 mm (3.5 inches) | 84% | moderate |
March Weather | 3°C (37°F) | 90 mm (3.5 inches) | 82% | high |
April Weather | 9°C (48°F) | 130 mm (5.1 inches) | 80% | very high |
May Weather | 14°C (58°F) | 94 mm (3.7 inches) | 72% | very high |
June Weather | 20°C (68°F) | 95 mm (3.7 inches) | 72% | very high |
July Weather | 23°C (74°F) | 150 mm (5.9 inches) | 67% | very high |
August Weather | 22°C (73°F) | 101 mm (4.0 inches) | 66% | very high |
September Weather | 19°C (66°F) | 93 mm (3.7 inches) | 71% | high |
October Weather | 13°C (55°F) | 141 mm (5.5 inches) | 78% | high |
November Weather | 5°C (42°F) | 101 mm (4.0 inches) | 84% | moderate |
December Weather | 0°C (33°F) | 123 mm (4.9 inches) | 81% | low |