Last updated: June 24, 2025
In December, the average temperature in Northampton, United States hovers around 2°C (36°F), with minimums dipping as low as -14°C (6°F) and maximums reaching up to 17°C (63°F). Prepare for a fair amount of precipitation, averaging 110 mm (4.3 in) over about 11 days, and brace yourself for the high humidity levels, typically around 85%.
In December in Northampton, the average temperature is 2°C (36°F), with maximums reaching up to 17°C (63°F) and minimums dropping as low as -14°C (6°F). This makes it essential for travelers to prepare for a wide range of temperatures, ensuring they have appropriate clothing for both chilly and milder conditions.
In Northampton in December, the precipitation amount is 110 mm (4.3 in) spread over 11 days.
In Northampton in December, humidity is 85%. With an average temperature of 2°C (36°F), this humidity feels like an icy blanket clinging to your skin, making travel challenging as the cold dampness seeps into your bones and fogs your breath.
In Northampton 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 Northampton, you can visit Hourly UV Index in Northampton.
UV Risk Categories
Weather in Northampton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Northampton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 75 mm (2.9 inches) | 87% | moderate |
| February Weather | 1°C (34°F) | 109 mm (4.3 inches) | 85% | moderate |
| March Weather | 4°C (40°F) | 99 mm (3.9 inches) | 85% | high |
| April Weather | 10°C (51°F) | 115 mm (4.5 inches) | 83% | very high |
| May Weather | 16°C (61°F) | 141 mm (5.5 inches) | 75% | very high |
| June Weather | 21°C (70°F) | 106 mm (4.2 inches) | 73% | very high |
| July Weather | 24°C (76°F) | 136 mm (5.3 inches) | 65% | very high |
| August Weather | 23°C (74°F) | 142 mm (5.6 inches) | 62% | very high |
| September Weather | 20°C (68°F) | 111 mm (4.4 inches) | 66% | very high |
| October Weather | 14°C (57°F) | 122 mm (4.8 inches) | 79% | high |
| November Weather | 6°C (43°F) | 95 mm (3.7 inches) | 87% | moderate |
| December Weather | 2°C (36°F) | 110 mm (4.3 inches) | 85% | low |