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Climate in Rocky View County · ECCC 1991–2020 normals

Dry weather: only 445 mm of rain and snow a year falls on Rocky View County, less than on 82% of Canadian towns

Peak summer warmth arrives in July, with afternoons near 23.5°C. By July afternoons alone, it runs cooler than 80% of Canadian towns. June is the wettest month here, with about 11 times the rain and snow of January. Heating does most of its work from October to May, in months below 10°C on average.

July afternoons: cooler than 80% of Canadian towns

January nights: milder than 51% of Canadian towns

Rain and snow a year: drier than 82% of Canadian towns

ECCC publishes no normals for Rocky View County itself; the figures are those of Calgary (Airport), 18 km east.

July high

23.5°C

Typical Canadian town 25.5°C

January low

−13.5°C

Typical Canadian town −13.5°C

Rain & snow a year

445 mm

Typical Canadian town 883 mm

Snowfall a year

139 cm

Typical Canadian town 141 cm

Frost days

193

a year at 0°C or below

Frost-free days

119

21 May to 18 Sep

A year in Rocky View County at a glance

Each month’s typical high and low, in °C.

Jan−2°C−14°CColdest nights

Feb0°C−12°C

Mar4°C−8°CSnowiest

Apr11°C−2°C

May16°C3°CLast frost ~21 May

Jun20°C8°CWettest

Jul24°C10°CWarmest

Aug23°C9°C

Sep18°C5°CFirst frost ~18 Sep

Oct11°C−1°C

Nov now4°C−8°C

Dec0°C−12°C

What stands out about Rocky View County’s climate

Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.

Drier than 82% of Canadian townsAbout 445 mm of rain and melted snow a year; June is the wettest month and January the driest.Cooler than 80% of Canadian townsJuly afternoons average 23.5°C, the warmest of the year.

A normal year

What a year in Rocky View County feels like

Each season’s and each month’s usual high and low, 1991–2020.

Winter

−1°C / −12°C

34 mm, with 50 cm of snow

Spring

10°C / −2°C

108 mm, with 56 cm of snow

Summer

22°C / 9°C

232 mm of rain and snow, the wettest season

Autumn

11°C / −1°C

71 mm, with 33 cm of snow

−20°

−10°

0°

10°

20°

30°

−2°C−14°C

0°C−12°C

4°C−8°C

11°C−2°C

16°C3°C

20°C8°C

24°C10°C

23°C9°C

18°C5°C

11°C−1°C

4°C−8°C

0°C−12°C

JanFebMarAprMayJunJulAugSepOctNovDec

Best months to be outsideJulAugHighs of 17–27°C and nights of 8°C or more

Frost & warm days

About 193 frosts and 87 warm days a year

The frost season runs September to May, and December freezes nearly every night. Deep cold, under −20°C, comes on about 22 nights a year.

119 frost-free days · average dates, 1991–2020

21 May 18 Sep

JanFebMarAprMayJunJulAugSepOctNovDec

193

Frost days a year (0°C or below)

More frosts than 79% of Canadian towns

Days that stay below 0°C

Nights a year below −20°C

Days a year above 20°C

Days a year above 30°C

Frost days by month

Average days at 0°C or below

JFMAMJJASOND

Days above 20°C by month

Average days

JFMAMJJASOND

Rain & snow

About 445 mm of rain and snow a year

About 72 days a year bring 1 mm or more.

445 mm

Rain and snow a year

Drier than 82% of Canadian towns

342 mm

Of it as rain alone (77%)

113 mm

June, the wettest month

10 mm

January, the driest month

Rain and snow by month

Millimetres

113 mm

JFMAMJJASOND

Rain alone by month

Millimetres

113 mm

JFMAMJJASOND

Snow

About 139 cm of snow a year

The snow season runs September to May; March brings the most, about 24 cm.

139 cm

Snowfall a year

Less snowy than 54% of Canadian towns

Days a year with 0.2 cm of snow or more

Days a year with 1 cm or more on the ground

6 cm

Snow on the ground at the end of December, the deepest month

Snowfall by month

Centimetres

24 cm

JFMAMJJASOND

Snow on the ground by month

Centimetres at month’s end

6 cm

JFMAMJJASOND

Heating

Heating a home in Rocky View County

85% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.

4,994 heating degree days (below 18°C)a year, 1991–2020

1,448 growing degree days (above 5°C)a year, 1991–2020

ECCC sums, over the year, how many degrees each day’s average falls short of 18°C. A house here needs more heating than 68% of Canadian towns.

Living here

Living with Rocky View County’s climate

Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.

The garden window

Between the last frost, near 21 May, and the first, near 18 September, lie about 119 frost-free days.

Get outside

The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jul and Aug.

Parks & trails →

Wind chill

The wind chill passes −20 on about 42 days in a normal year.

Humidex

Humid heat, a humidex over 30, comes on about 9 days a year.

Storms and extremes

For the weather that does damage, from ice storms to floods, see Rocky View County’s hazards page.

Flood & hazards →

Weather station

ECCC’s normals location: Calgary (Airport)

Calgary (Airport) is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.

Distance from the town	18 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, 75 km

Compared with other towns

How Rocky View County 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.

July afternoons23.5°C

Rocky View CountyMedian Canadian town

20°C22°C24°C26°C28°C

Cooler than 80% of Canadian towns

January nights−13.5°C

Rocky View CountyMedian Canadian town

−25°C−20°C−15°C−10°C

Milder than 51% of Canadian towns

Rain and snow a year445 mm

Rocky View CountyMedian Canadian town

05001,0001,500

Drier than 82% of Canadian towns

Snowfall a year139 cm

Rocky View CountyMedian Canadian town

0100200300

Less snowy than 54% of Canadian towns

Next door

Nearby towns’ climate

Nearby places read from a different ECCC location (places on Rocky View County’s own would show the same figures). The nearest places to Rocky View County with figures are 41–64 km away.

Town	July high	January low	Rain & snow
Rocky View County Calgary (Airport)	23.5°C	−13.5°C	445 mm
Stoney 142, 143, 144 41 km · Banff	22.5°C 1.0°C cooler	−13.5°C about the same	454 mm
Carstairs 45 km · Sundre	22.8°C 0.7°C cooler	−18.0°C 4.5°C colder	496 mm

Month by month

Rocky View County 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

Year to year

Two years in three, February’s average lands within 4.1°C of normal, against the steadier June

Records from 1991 to 2020: no month spans more than December, between −38.2°C (1996) and 19.5°C (1999).

−50°

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Rocky View County’s numbers come from

Averages over 30 years, not a forecast.

Normals: ECCC’s 1991–2020 Canadian Climate Normals for Calgary (Airport), the nearest location with a full year of temperatures.
Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
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 Rocky View County’s climate

How warm does Rocky View County get in summer?

The year’s warmest days come in July, with highs averaging 23.5°C.

How cold does Rocky View County get in winter?

Winter bottoms out in January, with lows near −13.5°C.

How much rain and snow does Rocky View County get?

A normal year brings 445 mm, snow included as water: June is wettest at 113 mm, January driest at 10 mm.

How long does snow stay on the ground?

Count on about 93 days of snow cover a year, 1 cm or deeper.

Are these figures for Rocky View County itself?

They describe Calgary (Airport), the nearest normals location, rather than Rocky View County itself.

Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rocky View County →

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).