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December Weather in Chilliwack, Canada

Last updated: June 18, 2025

In Chilliwack, Canada, the average temperature in December hovers around 0°C (33°F), with extremes ranging from a chilly -21°C (-5°F) to a milder 9°C (49°F). During this month, the region witnesses significant precipitation, accumulating 346 mm (13.6 in) over 20 days, resulting in a high average humidity of 89%. Be prepared for wet and cold conditions!

December Temperature in Chilliwack

In December in Chilliwack, the average temperature is 0°C (33°F). Maximums can reach 9°C (49°F) and minimums can be as low as -21°C (-5°F). Be prepared for a wide range of temperatures when traveling to Chilliwack during this month.

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

The chart illustrates December temperature patterns in Chilliwack, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chilliwack, December typically has an average temperature of 0°C (33°F), with highs reaching up to 9°C (49°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec323037435256616256453832
Data source: Temperature data for Chilliwack 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 Chilliwack

In Chilliwack in December, the precipitation amount is 346 mm (13.6 in) over the course of 20 days.

December Precipitation Trends in Chilliwack

The chart displays monthly precipitation patterns in Chilliwack, 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 Chilliwack, December typically receives around 346 mm (13.6 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec305272236181103965642187292435346
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chilliwack

In Chilliwack in December humidity is 89%. With an average temperature of 0°C (33°F), this humidity feels like a heavy, damp blanket that clings to your skin, making travel uncomfortable and every breath seem colder and more constricted.

December Average Humidity in Chilliwack

This chart illustrates the average monthly humidity levels in Chilliwack, 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 Chilliwack is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%88%86%82%82%85%77%76%88%88%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chilliwack

In Chilliwack in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Chilliwack.

Maximum UV Index Levels in Chilliwack for December

The chart shows the monthly maximum UV Index (UVI) for Chilliwack 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 Chilliwack typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Chilliwack 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 Chilliwack Compares to Other Months

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

This table compares monthly weather conditions in Chilliwack, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)305 mm (12.0 inches)87%low
February Weather-1°C (30°F)272 mm (10.7 inches)86%moderate
March Weather3°C (37°F)236 mm (9.3 inches)88%moderate
April Weather6°C (43°F)181 mm (7.1 inches)86%high
May Weather11°C (52°F)103 mm (4.1 inches)82%very high
June Weather13°C (56°F)95 mm (3.8 inches)82%very high
July Weather16°C (62°F)56 mm (2.2 inches)85%very high
August Weather17°C (62°F)42 mm (1.7 inches)77%very high
September Weather13°C (56°F)187 mm (7.4 inches)76%high
October Weather7°C (45°F)292 mm (11.5 inches)88%moderate
November Weather4°C (39°F)435 mm (17.1 inches)88%low
December Weather0°C (33°F)346 mm (13.6 inches)89%low

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