December Weather in Northampton, United States

Last updated: June 24, 2025

In December, the average temperature in Northampton, United States hovers around 0°C (32°F). Expect temperature fluctuations with a minimum of -20°C (-3°F) and a maximum of 16°C (60°F). During this month, precipitation totals approximately 123 mm (4.8 in) over 10 days, contributing to a notably high average humidity of 84%.

December Temperature in Northampton

In December in Northampton, the average temperature is 0°C (32°F). Maximums can reach 16°C (60°F) and minimums can drop as low as -20°C (-3°F). It's essential to pack for both chilly and mild weather when planning your visit.

December Weather in Northampton: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Northampton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Northampton, December typically has an average temperature of 0°C (32°F), with highs reaching up to 16°C (60°F) and lows dropping to around -20°C (-3°F).

Data source: Temperature data for Northampton generated using information from the Copernicus Climate Change Service.

December Precipitation in Northampton

In Northampton in December, the total precipitation amount is 123 mm (4.8 in) over the course of 10 days.

December Precipitation Trends in Northampton

The chart displays monthly precipitation patterns in Northampton, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Northampton, December typically receives around 123 mm (4.8 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Northampton

In Northampton in December, humidity is 84%. With an average temperature of 0°C (32°F), this humidity feels like a cold, damp chill that seeps into your clothes, making traveling uncomfortable and necessitating extra layers to stay warm despite the moisture-laden air.

December Average Humidity in Northampton

This chart illustrates the average monthly humidity levels in Northampton, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Northampton is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Northampton

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.

Maximum UV Index Levels in Northampton for December

The chart shows the monthly maximum UV Index (UVI) for Northampton in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Northampton typically reaches 2, which falls under the low exposure category.

Data source: Northampton December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Northampton Compares to Other Months

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.

This table compares monthly weather conditions in Northampton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	79 mm (3.1 inches)	89%	moderate
February Weather	-1°C (31°F)	97 mm (3.8 inches)	88%	moderate
March Weather	2°C (36°F)	85 mm (3.4 inches)	86%	high
April Weather	8°C (48°F)	144 mm (5.7 inches)	84%	very high
May Weather	15°C (59°F)	109 mm (4.3 inches)	76%	very high
June Weather	20°C (68°F)	89 mm (3.5 inches)	72%	very high
July Weather	23°C (73°F)	158 mm (6.2 inches)	66%	very high
August Weather	22°C (72°F)	106 mm (4.2 inches)	64%	very high
September Weather	18°C (65°F)	112 mm (4.4 inches)	72%	very high
October Weather	12°C (54°F)	156 mm (6.2 inches)	81%	high
November Weather	5°C (41°F)	97 mm (3.8 inches)	87%	moderate
December Weather	0°C (32°F)	123 mm (4.8 inches)	84%	low