Rosslyn is drier than 90% of Canadian towns: 423 mm of rain and snow a year
Deep winter brings January lows near −14.7°C. Its July afternoons stay fresher than in 80% of Canadian towns. Of all months, July brings the most precipitation and February the least. Garden chairs stay out from June to August, the months with highs of 21–24°C.
Read at Edmonton (City), 2.9 km south-west: ECCC’s normals for 1991–2020.
A year in Rosslyn at a glance
Each month’s typical high and low, in °C.
What stands out about Rosslyn’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Rosslyn feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 179 days, 20°C on 90
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
423 mm of precipitation in a typical year
Some 72 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 124 cm in a normal year
Snow falls from October to May, most of all in January (about 26 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Rosslyn
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year. A house here needs more heating than 76% of Canadian towns.
Living with Rosslyn’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Frost usually lets go around 7 May and returns near 25 September, about 141 days apart.
Plan time outside for Jun, Jul and Aug: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →About 50 days a year bring a wind chill under −20, when bare skin chills fast.
Expect around 11 sticky days a year with the humidex above 30.
Bad-weather days, from blizzards to floods, get their own page for Rosslyn: the 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 | 2.9 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, 25 km |
How Rosslyn 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
The nearest places on a normals location of their own: those that share Rosslyn’s would only repeat its figures. The nearest places to Rosslyn with figures are 20–28 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Rosslyn Edmonton (City) | 23.5°C | −14.7°C | 423 mm |
| Fort Saskatchewan 20 km · Fort Saskatchewan | 23.6°C about the same | −17.8°C 3.1°C colder | 473 mm |
| Beaumont 27 km · Edmonton (Airport) | 23.0°C 0.5°C cooler | −18.1°C 3.4°C colder | 434 mm |
Rosslyn 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 |
March has run from −34.0°C to 23.9°C in thirty years
From one year to the next, February’s average typically shifts by 4.2°C around its normal of −7.9°C, the widest of any month, while June’s shifts by 1.0°C.
Where Rosslyn’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Edmonton (City), its nearest location with complete temperatures.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- Not on this page: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Rosslyn’s climate
How warm does Rosslyn get in summer?
Afternoons average 23.5°C in July, the warmest time of year.
How cold does Rosslyn get in winter?
Deep winter means January, when nights average −14.7°C.
How much rain and snow does Rosslyn get?
July is the wettest month at 83 mm and February the driest at 12 mm, for 423 mm over the year.
Are these figures for Rosslyn itself?
Almost: ECCC’s Edmonton (City) location, which gives these figures, lies a short way outside Rosslyn.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rosslyn →
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).