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Monthly climate in Slave Lake, Alberta, Canada

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Slave Lake features a subarctic climate (Dfc). Temperatures typically range between -13 °C (8 °F) and 16 °C (61 °F) through the year, but rarely can drop to -41 °C (-42 °F) or can rise to as high as 37 °C (98 °F). The average annual precipitation amounts to about 604 mm (23.8 inches) and receives 107 rainy days on the 1 mm (0.04 inches) threshold annually. Slave Lake enjoys an average of 2827 hours of sunshine throughout the year, and daylight varies from 7 hours 11 minutes to 17 hours 19 minutes per day.

Monthly average temperatures in Slave Lake, Alberta, Canada §

The warmest months in Slave Lake are June, July and August, with daily mean temperatures ranging from 14 to 16 °C (58 - 61 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -13 to -10 °C (8 - 14 °F) throughout the day. On average each year, Slave Lake experiences 12 days above 25 °C (77.0 °F) and 187 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Slave Lake, Alberta, Canada. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 8°C
(47°F)		 14°C
(57°F)		 16°C
(61°F)		 24°C
(76°F)		 29°C
(85°F)		 36°C
(97°F)		 37°C
(98°F)		 30°C
(85°F)		 28°C
(82°F)		 22°C
(73°F)		 13°C
(55°F)		 10°C
(50°F)
Mean maximum 6°C
(43°F)		 6°C
(43°F)		 11°C
(52°F)		 18°C
(64°F)		 25°C
(77°F)		 26°C
(80°F)		 29°C
(85°F)		 27°C
(81°F)		 24°C
(75°F)		 19°C
(67°F)		 8°C
(47°F)		 6°C
(42°F)
Average high -7°C
(20°F)		 -8°C
(17°F)		 0°C
(32°F)		 6°C
(44°F)		 16°C
(61°F)		 19°C
(67°F)		 21°C
(70°F)		 20°C
(68°F)		 14°C
(58°F)		 7°C
(45°F)		 -2°C
(29°F)		 -6°C
(21°F)
Daily mean -11°C
(12°F)		 -13°C
(8°F)		 -6°C
(22°F)		 1°C
(34°F)		 10°C
(50°F)		 14°C
(58°F)		 16°C
(61°F)		 14°C
(58°F)		 9°C
(49°F)		 2°C
(36°F)		 -6°C
(22°F)		 -10°C
(14°F)
Average low -16°C
(4°F)		 -19°C
(-1°F)		 -11°C
(13°F)		 -4°C
(25°F)		 3°C
(38°F)		 8°C
(47°F)		 10°C
(51°F)		 9°C
(48°F)		 4°C
(40°F)		 -2°C
(28°F)		 -10°C
(15°F)		 -14°C
(7°F)
Mean minimum -33°C
(-28°F)		 -35°C
(-30°F)		 -27°C
(-16°F)		 -15°C
(6°F)		 -3°C
(26°F)		 2°C
(35°F)		 6°C
(44°F)		 3°C
(38°F)		 -3°C
(27°F)		 -10°C
(14°F)		 -22°C
(-8°F)		 -29°C
(-19°F)
Minimum -41°C
(-41°F)		 -41°C
(-42°F)		 -34°C
(-28°F)		 -26°C
(-15°F)		 -6°C
(21°F)		 0°C
(32°F)		 5°C
(41°F)		 2°C
(35°F)		 -4°C
(24°F)		 -16°C
(3°F)		 -25°C
(-13°F)		 -38°C
(-37°F)

Compare climate in Slave Lake with other places

Compare temperature, precipitation, sunshine, UV index in Slave Lake, Alberta, Canada with other places around the world.

Monthly average precipitation in Slave Lake, Alberta, Canada §

Slave Lake usually has the most precipitation in June, July and August, with an average of 13 rainy days and 100 mm (3.9 inches) of precipitation per month. The driest months in Slave Lake are January, March and December. On average, 22 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Slave Lake, Alberta, Canada. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 21 (0.8) 24 (0.9) 23 (0.9) 34 (1.3) 41 (1.6) 113 (4.4) 121 (4.7) 67 (2.7) 55 (2.2) 44 (1.7) 40 (1.6) 22 (0.9)
Average precipitation days (≥ 1 mm) 6 6 7 8 7 13 15 12 10 8 9 6

Monthly sunshine hours in Slave Lake, Alberta, Canada §

The sunniest months in Slave Lake are May, June and July, when the sun shines an average of 11 hours 2 minutes a day. Least sunny months in Slave Lake: January, November and December receive an average of 4 hours 11 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Slave Lake, Alberta, Canada. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 106 173 235 269 337 329 348 318 235 193 138 140
Mean daily daylight hours 7h 49m 9h 40m 11h 55m 14h 12m 16h 14m 17h 19m 16h 42m 14h 51m 12h 38m 10h 22m 8h 18m 7h 11m

Solar UV radiation in Slave Lake, Alberta, Canada §

Slave Lake experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 7 - 7, which corresponds to the High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 1. For more detailed information, check out our hourly Slave Lake UV Index data.

Average daily maximum UV levels by month for Slave Lake, Alberta, Canada. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 1 2 4 5 7 7 7 7 6 3 1 1

Detailed Monthly Weather Insights for Slave Lake, Alberta, Canada

Discover in-depth weather details for every month in Slave Lake. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Slave Lake's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.