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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 1°C (33°F), with extremes ranging from a chilly -16°C (3°F) to a mild 22°C (72°F). Expect about 16 mm (0.6 in) of precipitation over the course of 3 days, and prepare for a humid atmosphere with an average humidity level of 85%. Whether you're bracing for the cold or enjoying a rare warm day, Windsor has a unique climate to explore!

December Temperature in Windsor

In December in Windsor, the average temperature is 1°C (33°F). Maximums can reach 22°C (72°F), and minimums can drop as low as -16°C (3°F). Be prepared for a wide range of temperatures during your travels.

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 1°C (33°F), with highs reaching up to 22°C (72°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec302940475568747265484033
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 16 mm (0.6 in), spread over a duration of 3 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 16 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec1723535311640303726362116
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 85%. With an average temperature of 1°C (33°F), this humidity feels like a chilling blanket wrapping around you, making outdoor exploration quite uncomfortable and potentially exhausting for travelers.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%86%75%67%67%68%62%63%63%72%80%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46811111212119643
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 Weather-1°C (30°F)17 mm (0.7 inches)84%moderate
February Weather-2°C (29°F)23 mm (0.9 inches)85%high
March Weather4°C (40°F)53 mm (2.1 inches)75%very high
April Weather8°C (47°F)53 mm (2.1 inches)67%extreme
May Weather13°C (56°F)116 mm (4.6 inches)67%extreme
June Weather20°C (68°F)40 mm (1.6 inches)68%extreme
July Weather23°C (74°F)30 mm (1.2 inches)62%extreme
August Weather22°C (72°F)37 mm (1.5 inches)63%extreme
September Weather19°C (66°F)26 mm (1.0 inches)63%very high
October Weather9°C (49°F)36 mm (1.4 inches)72%high
November Weather4°C (40°F)21 mm (0.8 inches)79%moderate
December Weather1°C (33°F)16 mm (0.6 inches)85%moderate

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