Last updated: June 24, 2025
In December, the average temperature in New Boston, United States is a chilly 0°C (33°F). This month can experience extreme variations, with minimum temperatures plummeting to -21°C (-6°F) and maximums reaching a balmy 22°C (72°F). Expect about 48 mm (1.9 in) of precipitation over 5 days, contributing to an average humidity level of 84%—perfect for those cozy indoor activities!
In December in New Boston, the average temperature is 0°C (33°F). Maximums can reach 22°C (72°F) and minimums can be as low as -21°C (-6°F). Be prepared for a wide range of temperatures and pack accordingly for your trip.
In New Boston in December, the precipitation amount is 48 mm (1.9 in) spread over the course of 5 days.
In New Boston in December humidity is 84%. With average temperature 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less enjoyable and travel plans challenging.
In New Boston 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 New Boston, you can visit Hourly UV Index in New Boston.
UV Risk Categories
Weather in New Boston varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in New Boston, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 53 mm (2.1 inches) | 81% | moderate |
| February Weather | -3°C (27°F) | 60 mm (2.4 inches) | 81% | moderate |
| March Weather | 5°C (41°F) | 94 mm (3.7 inches) | 81% | high |
| April Weather | 10°C (50°F) | 92 mm (3.6 inches) | 82% | very high |
| May Weather | 17°C (63°F) | 155 mm (6.1 inches) | 78% | very high |
| June Weather | 24°C (75°F) | 133 mm (5.2 inches) | 81% | extreme |
| July Weather | 25°C (78°F) | 79 mm (3.1 inches) | 79% | very high |
| August Weather | 24°C (75°F) | 64 mm (2.5 inches) | 77% | very high |
| September Weather | 21°C (69°F) | 105 mm (4.1 inches) | 78% | very high |
| October Weather | 13°C (55°F) | 129 mm (5.1 inches) | 78% | high |
| November Weather | 4°C (40°F) | 51 mm (2.0 inches) | 87% | moderate |
| December Weather | 0°C (33°F) | 48 mm (1.9 inches) | 84% | low |