Lesser Slave River No. 124 has some of the coolest summers among Canadian towns
In January the night’s low is typically −18.2°C. By precipitation alone, it ranks drier than 94% of Canadian towns. July is the wettest month, March the driest. Wet days, with 1 mm of rain or snow or more, come about 85 times a year.
Lesser Slave River No. 124 has no ECCC normals station of its own: every figure here comes from Slave Lake, 11 km west.
A year in Lesser Slave River No. 124 at a glance
Each month’s typical high and low, in °C.
What stands out about Lesser Slave River No. 124’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Lesser Slave River No. 124 feels like
Each season’s and each month’s usual high and low, 1991–2020.
202 frost days and 68 days above 20°C a year
Frost comes from September to May; in December almost every night freezes. Some 36 nights a year drop under −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
422 mm of precipitation in a typical year
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 93 cm of snow a year
From October to May snow is likely; January is the peak, at about 20 cm.
Snowfall by month
Centimetres
Heating a home in Lesser Slave River No. 124
86% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.
Degree days add up how far each day’s mean temperature falls below 18°C over a year. That means homes here need more heating than 96% of Canadian towns.
Living with Lesser Slave River No. 124’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Between the last frost, near 26 May, and the first, near 16 September, lie about 112 frost-free days.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul and Aug.
Parks & trails →Wind chill falls below −20 on about 71 days a year: cover skin and dress in layers.
Humid summer days, the humidex above 30, number about 6 a year.
For blizzards, floods and wildfire, turn to Lesser Slave River No. 124’s hazards page.
Flood & hazards →ECCC’s normals location: Slave Lake
Slave Lake is a composite: ECCC joins 5 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 11 km west |
| Station altitude | 583 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −44.0°C |
| Hottest reading, 1991–2020 | 34.9°C |
| Average wind | 12.5 km/h on average, most often from the east |
| Next-nearest location | Campsie, 128 km |
How Lesser Slave River No. 124 compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Alberta.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Lesser Slave River No. 124’s own would show the same figures). The nearest places to Lesser Slave River No. 124 with figures are 81–120 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Lesser Slave River No. 124 Slave Lake | 21.8°C | −18.2°C | 422 mm |
| Swan Hills 81 km · Whitecourt | 22.2°C about the same | −16.0°C 2.2°C milder | 521 mm |
| Athabasca 106 km · Lac la Biche | 23.1°C 1.3°C warmer | −19.1°C 0.9°C colder | 473 mm |
Lesser Slave River No. 124 weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −8.3°C | −18.2°C | −13.3°C | 19 mm | 20 cm |
| February | −4.8°C | −16.2°C | −10.5°C | 13 mm | 12 cm |
| March | 0.6°C | −10.8°C | −5.1°C | 13 mm | 12 cm |
| April | 8.5°C | −3.1°C | 2.7°C | 23 mm | 8 cm |
| May | 15.8°C | 3.0°C | 9.4°C | 41 mm | 1 cm |
| June | 19.6°C | 8.3°C | 14.0°C | 75 mm | 0 cm |
| July | 21.8°C | 10.9°C | 16.4°C | 77 mm | 0 cm |
| August | 20.9°C | 9.5°C | 15.2°C | 56 mm | 0 cm |
| September | 15.7°C | 4.4°C | 10.1°C | 42 mm | under 1 cm |
| October | 8.1°C | −1.4°C | 3.3°C | 27 mm | 8 cm |
| November | −1.1°C | −9.6°C | −5.3°C | 19 mm | 16 cm |
| December | −7.2°C | −16.6°C | −11.9°C | 16 mm | 16 cm |
| Year | 7.5°C | −3.3°C | 2.1°C | 422 mm | 93 cm |
In January, anything from −44.0°C to 16.3°C
Bars run from each month’s record low to its record high over 1991–2020; December is the month whose average wanders most from year to year (±4.2°C around −11.9°C), June the one that wanders least (±0.8°C).
Where Lesser Slave River No. 124’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Slave Lake, the nearest location with a full year of temperatures.
- Comparisons: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Lesser Slave River No. 124’s climate
How warm does Lesser Slave River No. 124 get in summer?
Expect highs near 21.8°C in July, the hottest month on average.
How cold does Lesser Slave River No. 124 get in winter?
On a normal January night the air drops to −18.2°C, the coldest of the year.
How much rain and snow does Lesser Slave River No. 124 get?
Precipitation totals 422 mm a year, with July the wettest month (77 mm) and March the driest (13 mm).
Are these figures for Lesser Slave River No. 124 itself?
No, they come from Slave Lake; ECCC keeps no 1991–2020 normals in Lesser Slave River No. 124 itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Lesser Slave River No. 124 →
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).