Brentwood is drier than 82% of Canadian towns: 445 mm of rain and snow a year
The depth of winter brings overnight lows near −13.5°C. In July, afternoons here are cooler than in 80% of Canadian towns. Rain or snow is most frequent in June and least in January. Plan for rain or snow on about 72 days a year, the days with 1 mm or more.
Read at Calgary (Airport), 8.7 km east: ECCC’s normals for 1991–2020.
A year in Brentwood at a glance
Each month’s typical high and low, in °C.
What stands out about Brentwood’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Brentwood feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 193 days, 20°C on 87
Frost comes from September to May; in December almost every night freezes. On about 22 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
About 445 mm of rain and snow a year
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 139 cm in a normal year
Expect snow from September to May, with about 24 cm in March, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Brentwood
85% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year. By this count, homes here need more heating than 68% of Canadian towns.
Living with Brentwood’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Wait until about 21 May to plant out; frost tends to come back around 18 September, about 119 days later.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jul and Aug.
Parks & trails →The wind chill passes −20 on about 42 days in a normal year.
About 9 days a year turn sultry, with the humidex past 30.
Ice storms, floods and heat waves are risks, not averages: they are on Brentwood’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 | 8.7 km 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, 85 km |
How Brentwood 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 Brentwood’s would only repeat its figures. No closer places have figures: these lie 51–71 km from Brentwood.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Brentwood Calgary (Airport) | 23.5°C | −13.5°C | 445 mm |
| Carstairs 51 km · Sundre | 22.8°C 0.7°C cooler | −18.0°C 4.5°C colder | 496 mm |
| Stoney 142, 143, 144 51 km · Banff | 22.5°C 1.0°C cooler | −13.5°C about the same | 454 mm |
| Wheatland County 63 km · Queenstown | 25.0°C 1.5°C warmer | −13.7°C about the same | 412 mm |
Brentwood 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 |
From year to year, February moves by 4.1°C, more than any month, and June least
December has the widest record range, −38.2°C in 1996 to 19.5°C in 1999; the tick on each bar is the month’s normal.
Where Brentwood’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Calgary (Airport), the closest ECCC location with twelve months of temperature normals.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- 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 Brentwood’s climate
How warm does Brentwood get in summer?
Of all twelve months, July has the warmest afternoons, about 23.5°C.
How cold does Brentwood get in winter?
January nights average −13.5°C, the coldest of the year.
How much rain and snow does Brentwood get?
The year adds up to 445 mm. June is the peak month (113 mm) and January the low one (10 mm).
How long does snow stay on the ground?
Expect snow on the ground, at least 1 cm, for about 93 days a year.
Are these figures for Brentwood itself?
Almost: ECCC’s Calgary (Airport) location, which gives these figures, lies a short way outside Brentwood.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Brentwood →
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).