Less rain and snow fall on Rosscarrock than on 82% of Canadian towns: 445 mm a year
Nights in January average −13.5°C. In July, afternoons here are cooler than in 80% of Canadian towns. Winter and summer sit 37°C apart. For walks and days out, July and August bring highs of 23–24°C.
Figures: ECCC’s 1991–2020 normals for Calgary (Airport) (13 km north-east).
A year in Rosscarrock at a glance
Each month’s typical high and low, in °C.
What stands out about Rosscarrock’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Rosscarrock feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
193 frost days and 87 days above 20°C a year
The frost season runs September to May, and December freezes nearly every night. Some 22 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
445 mm of precipitation in a typical year
June brings the most rain and snow; January, the least. About 72 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 139 cm of snow a year
From September to May snow is likely; March is the peak, at about 24 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Rosscarrock
85% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.
The total grows by a degree for every degree a day’s mean sits under 18°C. Homes here need more heating than 68% of Canadian towns.
Living with Rosscarrock’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
The frost-free stretch runs from about 21 May to about 18 September, some 119 days in a normal year.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jul and Aug.
Parks & trails →A wind chill below −20 is part of about 42 days a year here.
Summer brings about 9 days when the humidex passes 30.
Severe weather is a separate story from the averages: see Rosscarrock’s hazards page.
Flood & hazards →ECCC’s normals location: Calgary (Airport)
ECCC builds the Calgary (Airport) normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 13 km north-east |
| Station altitude | 1,099 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −39.7°C |
| Hottest reading, 1991–2020 | 36.5°C |
| Average wind | 13.8 km/h on average, most often from the south |
| Next-nearest location | Sundre, 90 km |
How Rosscarrock 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
Places around Rosscarrock whose figures come from another normals location. No closer places have figures: these lie 51–71 km from Rosscarrock.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Rosscarrock Calgary (Airport) | 23.5°C | −13.5°C | 445 mm |
| Stoney 142, 143, 144 51 km · Banff | 22.5°C 1.0°C cooler | −13.5°C about the same | 454 mm |
| Carstairs 57 km · Sundre | 22.8°C 0.7°C cooler | −18.0°C 4.5°C colder | 496 mm |
| Wheatland County 64 km · Queenstown | 25.0°C 1.5°C warmer | −13.7°C about the same | 412 mm |
Rosscarrock 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 | −1.5°C | −13.5°C | −7.6°C | 10 mm | 17 cm |
| February | 0.1°C | −11.8°C | −5.9°C | 12 mm | 17 cm |
| March | 3.8°C | −8.1°C | −2.2°C | 18 mm | 24 cm |
| April | 10.8°C | −1.9°C | 4.5°C | 30 mm | 23 cm |
| May | 16.4°C | 3.4°C | 9.9°C | 61 mm | 10 cm |
| June | 19.7°C | 7.7°C | 13.7°C | 113 mm | under 1 cm |
| July | 23.5°C | 10.2°C | 16.9°C | 66 mm | 0 cm |
| August | 23.1°C | 9.2°C | 16.2°C | 54 mm | 0 cm |
| September | 18.3°C | 4.7°C | 11.5°C | 37 mm | 2 cm |
| October | 11.1°C | −1.3°C | 4.9°C | 17 mm | 12 cm |
| November | 4.1°C | −7.5°C | −1.7°C | 16 mm | 19 cm |
| December | −0.4°C | −12.1°C | −6.3°C | 13 mm | 16 cm |
| Year | 10.8°C | −1.8°C | 4.5°C | 445 mm | 139 cm |
February strays furthest from its normal year to year, by 4.1°C; June the least
Bars run from each month’s record low to its record high since 1991. December spans the most, from −38.2°C (1996) to 19.5°C (1999).
Where Rosscarrock’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Calgary (Airport), 1991–2020, chosen as the nearest location with a full temperature record.
- 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: sunshine, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Rosscarrock’s climate
How warm does Rosscarrock get in summer?
July is the warmest month, with average highs of 23.5°C.
How cold does Rosscarrock get in winter?
A typical January night falls to −13.5°C, the year’s low point.
How much rain and snow does Rosscarrock get?
Rain and snow add up to about 445 mm of water a year; June brings the most (113 mm), January the least (10 mm).
How long does snow stay on the ground?
In a normal winter there are about 93 days with at least 1 cm of snow lying.
Are these figures for Rosscarrock itself?
Almost: ECCC’s Calgary (Airport) location, which gives these figures, lies a short way outside Rosscarrock.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rosscarrock →
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).