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December Weather in Windsor, United States

Last updated: June 24, 2025

In December, the average temperature in Windsor, United States hovers around 4°C (40°F). Expect a minimum of -16°C (3°F) and a maximum of 24°C (76°F), showcasing the region's varied climate. With an average precipitation of 37 mm (1.5 in) spread over 4 days, you'll want to prepare for some wet weather. Don't forget, the average humidity sits at a high 86%, adding to the overall chill!

December Temperature in Windsor

In December in Windsor, the average temperature is 4°C (40°F). Maximums can reach 24°C (76°F) and minimums can be as low as -16°C (3°F). Pack accordingly to enjoy a mix of chilly and warmer days while exploring the beautiful surroundings.

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 4°C (40°F), with highs reaching up to 24°C (76°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec333548556777807773584540
Data source: Temperature data for Windsor generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Windsor

In Windsor in December, the precipitation amount is 37 mm (1.5 in) over the course of 4 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 37 mm (1.5 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec646011511118310712510365985337
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Windsor

In Windsor in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35610101111109753
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.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)64 mm (2.5 inches)80%moderate
February Weather2°C (35°F)59 mm (2.3 inches)78%moderate
March Weather9°C (48°F)115 mm (4.5 inches)75%high
April Weather13°C (55°F)111 mm (4.4 inches)77%very high
May Weather19°C (67°F)183 mm (7.2 inches)82%very high
June Weather25°C (77°F)106 mm (4.2 inches)83%extreme
July Weather27°C (80°F)125 mm (4.9 inches)81%extreme
August Weather25°C (77°F)103 mm (4.1 inches)78%very high
September Weather23°C (73°F)65 mm (2.6 inches)72%very high
October Weather15°C (59°F)98 mm (3.8 inches)72%high
November Weather7°C (46°F)53 mm (2.1 inches)84%moderate
December Weather4°C (40°F)37 mm (1.5 inches)86%moderate

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