Last updated: June 24, 2025
In New Boston, United States, the average temperature in December hovers around -1°C (30°F). Expect a chilly range where the minimum can plummet to -21°C (-6°F) while the maximum can reach a balmy 16°C (61°F). With 120 mm (4.7 in) of precipitation spread over 9 days, be prepared for some wet weather. The air tends to be quite humid, with an average humidity level of 81%.
In December in New Boston, the average temperature is -1°C (30°F). Maximum temperatures can reach 16°C (61°F), while minimums can drop as low as -21°C (-6°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In New Boston in December, the precipitation amount is 120 mm (4.7 in) over the course of 9 days.
In New Boston in December, humidity is 81%. With an average temperature of -1°C (30°F), this humidity feels like an extra layer of chill settles in, making travel uncomfortable and the cold air cling to your skin, dampening the experience with every breath.
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 (26°F) | 72 mm (2.8 inches) | 86% | moderate |
| February Weather | -2°C (28°F) | 86 mm (3.4 inches) | 84% | moderate |
| March Weather | 1°C (35°F) | 80 mm (3.2 inches) | 82% | moderate |
| April Weather | 8°C (46°F) | 130 mm (5.1 inches) | 80% | very high |
| May Weather | 14°C (58°F) | 80 mm (3.2 inches) | 72% | very high |
| June Weather | 20°C (68°F) | 84 mm (3.3 inches) | 72% | very high |
| July Weather | 23°C (73°F) | 144 mm (5.7 inches) | 67% | very high |
| August Weather | 22°C (71°F) | 97 mm (3.8 inches) | 66% | very high |
| September Weather | 18°C (64°F) | 84 mm (3.3 inches) | 71% | high |
| October Weather | 11°C (53°F) | 132 mm (5.2 inches) | 78% | moderate |
| November Weather | 4°C (39°F) | 103 mm (4.1 inches) | 84% | moderate |
| December Weather | -1°C (30°F) | 120 mm (4.7 inches) | 81% | low |