Less rain and snow fall on Casselman than on 90% of Canadian towns: 423 mm a year
The depth of winter brings overnight lows near −14.7°C. In July, afternoons here are cooler than in 80% of Canadian towns. Some 38°C separates winter nights from summer afternoons. Plan time outside from June to August, when highs sit at 21–24°C.
Figures: ECCC’s 1991–2020 normals for Edmonton (City) (7.7 km south-west).
A year in Casselman at a glance
Each month’s typical high and low, in °C.
What stands out about Casselman’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Casselman feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
About 179 frosts and 90 warm days a year
From September to May frost is routine, and in January it comes on almost every night. Some 24 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
Rain and melted snow: about 423 mm a year
July brings the most rain and snow; February, the least. On about 72 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 124 cm of snow a year
From October to May snow is likely; January is the peak, at about 26 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Casselman
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year. Homes here need more heating than 76% of Canadian towns.
Living with Casselman’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Wait until about 7 May to plant out; frost tends to come back around 25 September, about 141 days later.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul and Aug.
Parks & trails →A wind chill below −20 is part of about 50 days a year here.
On some 11 days a year the humidex climbs past 30.
Extremes don’t show in averages: floods, wildfire smoke and ice storms are on Casselman’s hazards page.
Flood & hazards →ECCC’s normals location: Edmonton (City)
ECCC builds the Edmonton (City) normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 7.7 km south-west |
| Station altitude | 671 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −37.8°C |
| Hottest reading, 1991–2020 | 34.9°C |
| Average wind | 12.2 km/h on average, most often from the west |
| Next-nearest location | Fort Saskatchewan, 20 km |
How Casselman 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 Casselman’s would only repeat its figures. Distances here run 15–29 km: that is how far the nearest places with figures are from Casselman.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Casselman Edmonton (City) | 23.5°C | −14.7°C | 423 mm |
| Fort Saskatchewan 15 km · Fort Saskatchewan | 23.6°C about the same | −17.8°C 3.1°C colder | 473 mm |
| Beaumont 29 km · Edmonton (Airport) | 23.0°C 0.5°C cooler | −18.1°C 3.4°C colder | 434 mm |
Casselman 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 | −5.8°C | −14.7°C | −10.3°C | 20 mm | 26 cm |
| February | −3.0°C | −12.7°C | −7.9°C | 12 mm | 13 cm |
| March | 1.7°C | −7.8°C | −3.1°C | 17 mm | 19 cm |
| April | 10.4°C | −0.7°C | 4.9°C | 29 mm | 15 cm |
| May | 17.5°C | 5.6°C | 11.6°C | 44 mm | 5 cm |
| June | 21.0°C | 10.2°C | 15.6°C | 70 mm | 0 cm |
| July | 23.5°C | 12.6°C | 18.1°C | 83 mm | 0 cm |
| August | 22.6°C | 11.3°C | 17.0°C | 61 mm | under 1 cm |
| September | 17.6°C | 6.2°C | 11.9°C | 39 mm | 1 cm |
| October | 10.0°C | −0.1°C | 5.0°C | 21 mm | 11 cm |
| November | 0.6°C | −7.5°C | −3.5°C | 18 mm | 20 cm |
| December | −4.7°C | −13.2°C | −9.0°C | 12 mm | 15 cm |
| Year | 9.3°C | −0.9°C | 4.2°C | 423 mm | 124 cm |
In March, anything from −34.0°C to 23.9°C
Bars run from each month’s record low to its record high over 1991–2020; February is the month whose average wanders most from year to year (±4.2°C around −7.9°C), June the one that wanders least (±1.0°C).
Where Casselman’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Edmonton (City), 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Casselman’s climate
How warm does Casselman get in summer?
Midsummer means July, with afternoons near 23.5°C on a typical day.
How cold does Casselman get in winter?
Midwinter means January, when a typical night reaches −14.7°C.
How much rain and snow does Casselman get?
A normal year brings 423 mm, snow included as water: July is wettest at 83 mm, February driest at 12 mm.
Are these figures for Casselman itself?
Almost: ECCC’s Edmonton (City) location, which gives these figures, lies a short way outside Casselman.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Casselman →
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).