Last updated: June 24, 2025
In December, the average temperature in Marlborough, United States hovers around -2°C (29°F). However, temperatures can range significantly, dipping as low as -24°C (-10°F) and soaring to a maximum of 15°C (60°F). Expect a precipitation amount of 112 mm (4.4 in) spread over 9 days, contributing to an average humidity of 81%. This weather mix creates a unique atmosphere, perfect for embracing the chill!
In December in Marlborough, the average temperature is -2°C (29°F), with maximums reaching up to 15°C (60°F) and minimums dropping as low as -24°C (-10°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.
In Marlborough in December, the total precipitation amount is 112 mm (4.4 in), occurring over a span of 9 days.
In Marlborough in December humidity is 81%. With an average temperature of -2°C (29°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm while traveling.
In Marlborough 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 Marlborough, you can visit Hourly UV Index in Marlborough.
UV Risk Categories
Weather in Marlborough varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Marlborough, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 72 mm (2.8 inches) | 86% | moderate |
| February Weather | -3°C (27°F) | 85 mm (3.4 inches) | 84% | moderate |
| March Weather | 1°C (33°F) | 75 mm (3.0 inches) | 82% | high |
| April Weather | 7°C (45°F) | 123 mm (4.8 inches) | 80% | very high |
| May Weather | 14°C (57°F) | 81 mm (3.2 inches) | 72% | very high |
| June Weather | 19°C (67°F) | 78 mm (3.1 inches) | 72% | very high |
| July Weather | 22°C (72°F) | 119 mm (4.7 inches) | 67% | very high |
| August Weather | 21°C (71°F) | 89 mm (3.5 inches) | 66% | very high |
| September Weather | 17°C (63°F) | 80 mm (3.1 inches) | 71% | high |
| October Weather | 11°C (52°F) | 135 mm (5.3 inches) | 78% | high |
| November Weather | 3°C (38°F) | 100 mm (3.9 inches) | 84% | moderate |
| December Weather | -2°C (29°F) | 112 mm (4.4 inches) | 81% | low |