December Weather in Windsor, United States

Last updated: June 24, 2025

In December, the average temperature in Windsor, United States hovers around 9°C (48°F), with a minimum dipping to -8°C (18°F) and a maximum rising to 25°C (77°F). During this time, residents can expect about 98 mm (3.8 in) of precipitation spread across 10 days, contributing to an average humidity level of 84%.

December Temperature in Windsor

In December in Windsor, the average temperature is 9°C (48°F), with maximums reaching 25°C (77°F) and minimums plummeting as low as -8°C (18°F). Pack accordingly to enjoy a comfortable visit, as the weather can vary greatly during this time.

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

The chart illustrates December temperature patterns in Windsor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Windsor, December typically has an average temperature of 9°C (48°F), with highs reaching up to 25°C (77°F) and lows dropping to around -8°C (18°F).

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

December Precipitation in Windsor

In Windsor in December, the precipitation amount is 98 mm (3.8 in) spread over a period of 10 days.

December Precipitation Trends in Windsor

The chart displays monthly precipitation patterns in Windsor, 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 Windsor, December typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Windsor

In Windsor in December, humidity is 84%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that envelops you, making it essential to dress in layers and stay active, as the moisture in the air can quickly lead to discomfort while traveling.

December Average Humidity in Windsor

This chart illustrates the average monthly humidity levels in Windsor, 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 Windsor 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 Windsor

In Windsor 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 Windsor, you can check the information here.

Maximum UV Index Levels in Windsor for December

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

Data source: Windsor 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 Windsor Compares to Other Months

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

This table compares monthly weather conditions in Windsor, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	95 mm (3.7 inches)	84%	moderate
February Weather	10°C (49°F)	90 mm (3.5 inches)	81%	high
March Weather	11°C (53°F)	69 mm (2.7 inches)	80%	very high
April Weather	17°C (62°F)	99 mm (3.9 inches)	80%	very high
May Weather	21°C (70°F)	114 mm (4.5 inches)	81%	extreme
June Weather	24°C (76°F)	147 mm (5.8 inches)	82%	extreme
July Weather	27°C (80°F)	137 mm (5.4 inches)	83%	extreme
August Weather	26°C (79°F)	171 mm (6.7 inches)	82%	very high
September Weather	24°C (75°F)	119 mm (4.7 inches)	80%	very high
October Weather	19°C (66°F)	76 mm (3.0 inches)	79%	very high
November Weather	12°C (53°F)	89 mm (3.5 inches)	83%	moderate
December Weather	9°C (48°F)	98 mm (3.8 inches)	84%	moderate