Photo: Wilson Hui from Calgary, Canada · CC BY 2.0Westlock sits near the top of Canadian towns for frosts
Peak summer warmth arrives in July, with afternoons near 23.5°C. Summers stay cool: July afternoons here are cooler than in 80% of Canadian towns. A year here swings 43°C from midwinter lows to midsummer highs. Plan for rain or snow on about 82 days a year, the days with 1 mm or more.
The nearest ECCC normals location is Campsie, 54 km west: at that distance its figures describe the region more than Westlock itself.
A year in Westlock at a glance
Each month’s typical high and low, in °C.
What stands out about Westlock’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Westlock feels like
Each season’s and each month’s usual high and low, 1991–2020.
216 frost days and 87 days above 20°C a year
From September to May frost is routine, and in January it comes on almost every night. On about 42 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 466 mm a year
July is the wettest month and February the driest.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 128 cm in a normal year
Snow falls from October to May, most of all in January (about 29 cm).
Snowfall by month
Centimetres
Heating a home in Westlock
87% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
ECCC sums, over the year, how many degrees each day’s average falls short of 18°C. Homes here need more heating than 93% of Canadian towns.
Living with Westlock’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
The growing season between frosts lasts about 91 days, roughly 1 June to 1 September.
The outdoor season by the averages is Jul and Aug, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Thirty years of averages say little about one bad storm; Westlock’s hazards page does.
Flood & hazards →ECCC’s normals location: Campsie
ECCC builds the Campsie normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 54 km west |
| Station altitude | 671 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −47.5°C |
| Hottest reading, 1991–2020 | 36.5°C |
| Next-nearest location | Fort Saskatchewan, 65 km |
How Westlock compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Alberta.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Westlock’s would only repeat its figures. Westlock has few close neighbours with figures, so the list reaches 28–47 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Westlock Campsie | 23.5°C | −19.0°C | 466 mm |
| Legal 28 km · Fort Saskatchewan | 23.6°C about the same | −17.8°C 1.2°C milder | 473 mm |
| Alexander 134 37 km · Edmonton (City) | 23.5°C about the same | −14.7°C 4.3°C milder | 423 mm |
Westlock weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −6.6°C | −19.0°C | −12.8°C | 27 mm | 29 cm |
| February | −3.1°C | −16.9°C | −10.0°C | 15 mm | 14 cm |
| March | 1.8°C | −11.2°C | −4.7°C | 18 mm | 18 cm |
| April | 10.5°C | −3.1°C | 3.7°C | 30 mm | 10 cm |
| May | 17.5°C | 2.5°C | 10.1°C | 47 mm | 3 cm |
| June | 20.9°C | 7.3°C | 14.1°C | 84 mm | 0 cm |
| July | 23.5°C | 9.7°C | 16.6°C | 86 mm | 0 cm |
| August | 22.5°C | 8.1°C | 15.3°C | 57 mm | 0 cm |
| September | 17.6°C | 2.9°C | 10.3°C | 36 mm | under 1 cm |
| October | 9.6°C | −2.9°C | 3.4°C | 23 mm | 10 cm |
| November | −0.1°C | −10.7°C | −5.3°C | 25 mm | 24 cm |
| December | −5.8°C | −17.5°C | −11.7°C | 19 mm | 20 cm |
| Year | 9.0°C | −4.2°C | 2.4°C | 466 mm | 128 cm |
A December here can run warm or cold, its average moving by about 4.4°C; the steadiest month is June
Each bar spans a month’s coldest and warmest readings over thirty years; January’s run from −47.5°C in 2008 to 20.5°C in 2009.
Where Westlock’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Campsie from ECCC’s climate data site, the nearest location with every month of temperature.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Westlock’s climate
How warm does Westlock get in summer?
At its warmest, in July, the normal high is 23.5°C.
How cold does Westlock get in winter?
Overnight lows average −19.0°C in January, the coldest month.
How much rain and snow does Westlock get?
466 mm a year counting snow as water. The wettest month is July (86 mm); the driest, February (15 mm).
Are these figures for Westlock itself?
No. The nearest normals are those of Campsie, a long way from Westlock.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Westlock →
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).