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December Weather in Slave Lake, Canada

Last updated: June 18, 2025

In December, the average temperature in Slave Lake, Canada hovers around -10°C (14°F). Expect extremes, as it can dip to a chilling -38°C (-37°F) and peak at a mild 10°C (50°F). Precipitation is modest with around 22 mm (0.9 in) spread over 6 days, while the air remains notably damp with an average humidity of 93%. Stay warm and prepared!

December Temperature in Slave Lake

In December in Slave Lake, the average temperature is -10°C (14°F), with a maximum that can reach 10°C (50°F) and a minimum that can drop as low as -38°C (-37°F). Be prepared for extreme temperature fluctuations when traveling to Slave Lake during this time.

December Weather in Slave Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Slave Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Slave Lake, December typically has an average temperature of -10°C (14°F), with highs reaching up to 10°C (50°F) and lows dropping to around -38°C (-37°F).
JanFebMarAprMayJunJulAugSepOctNovDec12822345057615848362214
Data source: Temperature data for Slave Lake 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 Slave Lake

In Slave Lake in December, the precipitation amount is 22 mm (0.9 in) over a span of 6 days.

December Precipitation Trends in Slave Lake

The chart displays monthly precipitation patterns in Slave Lake, 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 Slave Lake, December typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec22242334411131216756444022
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Slave Lake

In Slave Lake in December, humidity is 93%. With an average temperature of -10°C (14°F), this humidity feels like an invisible weight on your skin, making every breath feel thick and heavy, while the cold air bites sharply, creating a contrasting and uncomfortable chill that can make traveling outdoors feel like a daunting challenge.

December Average Humidity in Slave Lake

This chart illustrates the average monthly humidity levels in Slave Lake, 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 Slave Lake is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%93%91%78%70%70%79%78%73%81%85%93%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Slave Lake

In Slave Lake 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 Slave Lake.

Maximum UV Index Levels in Slave Lake for December

The chart shows the monthly maximum UV Index (UVI) for Slave Lake 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 Slave Lake typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124577776311
Data source: Slave Lake 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 Slave Lake Compares to Other Months

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

This table compares monthly weather conditions in Slave Lake, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (12°F)21 mm (0.8 inches)88%low
February Weather-13°C (8°F)24 mm (0.9 inches)93%low
March Weather-6°C (22°F)23 mm (0.9 inches)90%moderate
April Weather1°C (34°F)34 mm (1.3 inches)78%moderate
May Weather10°C (50°F)41 mm (1.6 inches)70%high
June Weather14°C (58°F)113 mm (4.4 inches)70%high
July Weather16°C (61°F)121 mm (4.7 inches)79%high
August Weather14°C (58°F)67 mm (2.7 inches)78%high
September Weather9°C (49°F)55 mm (2.2 inches)73%high
October Weather2°C (36°F)44 mm (1.7 inches)81%moderate
November Weather-6°C (22°F)40 mm (1.6 inches)85%low
December Weather-10°C (14°F)22 mm (0.9 inches)93%low

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