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December Weather in McGill, United States

Last updated: June 24, 2025

In December, the average temperature in McGill, United States hovers around -4°C (26°F). Be prepared for chilly extremes, as temperatures can dip as low as -23°C (-9°F) or reach a high of 12°C (54°F). Expect about 30 mm (1.2 in) of precipitation spread over 6 days, contributing to a notably high average humidity of 83%. Wrap up warm!

December Temperature in McGill

In December in McGill, the average temperature is -4°C (26°F). Maximums can reach 12°C (54°F) and minimums can be as low as -23°C (-9°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

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

The chart illustrates December temperature patterns in McGill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McGill, December typically has an average temperature of -4°C (26°F), with highs reaching up to 12°C (54°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec232533435367757464463826
Data source: Temperature data for McGill 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 McGill

In McGill in December, the total precipitation amount is 30 mm (1.2 in) spread across 6 days.

December Precipitation Trends in McGill

The chart displays monthly precipitation patterns in McGill, 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 McGill, December typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec29345941458141015252130
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in McGill

In McGill in December, humidity is 83%. With an average temperature of -4°C (26°F), this humidity feels like a chilling blanket that clings to your skin, making outdoor activities uncomfortable and forcing travelers to bundle up tightly, even as the cold penetrates through layers of clothing.

December Average Humidity in McGill

This chart illustrates the average monthly humidity levels in McGill, 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 McGill is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%76%67%51%44%37%32%43%63%80%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in McGill

In McGill in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in McGill for better planning.

Maximum UV Index Levels in McGill for December

The chart shows the monthly maximum UV Index (UVI) for McGill 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 McGill typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
Data source: McGill 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 McGill Compares to Other Months

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

This table compares monthly weather conditions in McGill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)29 mm (1.2 inches)82%moderate
February Weather-4°C (26°F)34 mm (1.3 inches)84%high
March Weather1°C (33°F)59 mm (2.3 inches)76%very high
April Weather6°C (44°F)41 mm (1.6 inches)67%very high
May Weather12°C (54°F)45 mm (1.8 inches)51%extreme
June Weather20°C (68°F)8 mm (0.3 inches)44%extreme
July Weather24°C (76°F)14 mm (0.6 inches)36%extreme
August Weather23°C (74°F)10 mm (0.4 inches)32%extreme
September Weather18°C (64°F)15 mm (0.6 inches)43%very high
October Weather8°C (47°F)25 mm (1.0 inches)63%high
November Weather3°C (38°F)21 mm (0.8 inches)80%moderate
December Weather-4°C (26°F)30 mm (1.2 inches)83%moderate

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