December Weather in Mendon, United States

Last updated: June 24, 2025

In December, the average temperature in Mendon, United States hovers around 1°C (33°F). However, prepare for a range; temperatures can dip to a chilly -23°C (-9°F) or rise to a mild 17°C (62°F). Expect 62 mm (2.4 in) of precipitation spread across 11 days, and don't forget your umbrella, as humidity is quite high at 86%.

December Temperature in Mendon

In December in Mendon, the average temperature is 1°C (33°F). Maximums can reach 17°C (62°F), while minimums can drop as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures and dress accordingly.

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

The chart illustrates December temperature patterns in Mendon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mendon, December typically has an average temperature of 1°C (33°F), with highs reaching up to 17°C (62°F) and lows dropping to around -23°C (-9°F).

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

December Precipitation in Mendon

In Mendon in December, the precipitation amount is 62 mm (2.4 in) spread over 11 days.

December Precipitation Trends in Mendon

The chart displays monthly precipitation patterns in Mendon, 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 Mendon, December typically receives around 62 mm (2.4 inches) of precipitation spread over approximately 11 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 Mendon

In Mendon in December humidity is 86%. With average temperature 1°C (33°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and necessitating extra layers for warmth to counteract the dampness in the air.

December Average Humidity in Mendon

This chart illustrates the average monthly humidity levels in Mendon, 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 Mendon is approximately 86%, 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 Mendon

In Mendon in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Mendon, you can check the information here.

Maximum UV Index Levels in Mendon for December

The chart shows the monthly maximum UV Index (UVI) for Mendon 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 Mendon typically reaches 3, which falls under the moderate exposure category.

Data source: Mendon 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 Mendon Compares to Other Months

Weather in Mendon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mendon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Mendon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	72 mm (2.8 inches)	85%	moderate
February Weather	-2°C (28°F)	76 mm (3.0 inches)	85%	moderate
March Weather	3°C (38°F)	89 mm (3.5 inches)	86%	high
April Weather	8°C (48°F)	100 mm (3.9 inches)	87%	very high
May Weather	16°C (61°F)	148 mm (5.8 inches)	81%	very high
June Weather	22°C (71°F)	122 mm (4.8 inches)	82%	very high
July Weather	24°C (75°F)	115 mm (4.5 inches)	81%	very high
August Weather	22°C (72°F)	79 mm (3.1 inches)	79%	very high
September Weather	19°C (66°F)	86 mm (3.4 inches)	78%	high
October Weather	12°C (54°F)	136 mm (5.4 inches)	81%	high
November Weather	4°C (39°F)	76 mm (3.0 inches)	89%	moderate
December Weather	1°C (33°F)	62 mm (2.4 inches)	86%	moderate