Photo: Pymouss · CC BY-SA 4.0

Climate in Mont-Royal · ECCC 1991–2020 normals

Afternoon heat in Mont-Royal beats that of 78% of Canadian towns

Deep winter brings January lows near −13.5°C. The wettest month is October; the driest is February. Its yearly rain and snow top those of 74% of Canadian towns. Expect about 146 frosty starts a year, days when the air falls to freezing.

July afternoons: warmer than 78% of Canadian towns

January nights: milder than 51% of Canadian towns

Rain and snow a year: wetter than 74% of Canadian towns

No ECCC station in Mont-Royal has 1991–2020 normals; the page reads Montréal Trudeau (Airport), 9.6 km south-west, instead.

July high

26.7°C

Typical Canadian town 25.5°C

January low

−13.5°C

Typical Canadian town −13.5°C

Rain & snow a year

1,041 mm

Typical Canadian town 883 mm

Snowfall a year

217 cm

Typical Canadian town 141 cm

Frost days

146

a year at 0°C or below

Frost-free days

167

29 Apr to 14 Oct

A year in Mont-Royal at a glance

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

Jan−5°C−14°CColdest nightsSnowiest

Feb−3°C−12°C

Mar2°C−7°C

Apr11°C1°CLast frost ~29 Apr

May19°C8°C

Jun24°C14°C

Jul27°C17°CWarmest

Aug26°C16°C

Sep21°C11°C

Oct13°C5°CWettestFirst frost ~14 Oct

Nov now6°C−2°C

Dec−1°C−9°C

What stands out about Mont-Royal’s climate

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

Snowier than 80% of Canadian townsAbout 217 cm of snow falls in a year, most of it in January.Warmer than 78% of Canadian townsJuly afternoons average 26.7°C, the warmest of the year. 4th warmest of 513 towns of 2,500+ in Quebec.Wetter than 74% of Canadian townsAbout 1,041 mm of rain and melted snow a year; October is the wettest month and February the driest.

A normal year

What a year in Mont-Royal feels like

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

Winter

−3°C / −12°C

243 mm, with 147 cm of snow

Spring

11°C / 1°C

253 mm, with 52 cm of snow

Summer

26°C / 15°C

268 mm of rain and snow

Autumn

13°C / 5°C

277 mm, with 17 cm of snow: the wettest season

−20°

−10°

0°

10°

20°

30°

40°

−5°C−14°C

−3°C−12°C

2°C−7°C

11°C1°C

19°C8°C

24°C14°C

27°C17°C

26°C16°C

21°C11°C

13°C5°C

6°C−2°C

−1°C−9°C

JanFebMarAprMayJunJulAugSepOctNovDec

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

Frost & warm days

146 frost days and 121 days above 20°C a year

Frost comes from October to April; in January almost every night freezes. Deep cold, under −20°C, comes on about 12 nights a year.

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

29 Apr 14 Oct

JanFebMarAprMayJunJulAugSepOctNovDec

146

Frost days a year (0°C or below)

Fewer frosts than 65% of Canadian towns

Days that stay below 0°C

Nights a year below −20°C

121

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

Rain and melted snow: about 1,041 mm a year

Some 122 days a year see 1 mm of rain or snow or more.

1,041 mm

Rain and snow a year

Wetter than 74% of Canadian towns

818 mm

Of it as rain alone (79%)

103 mm

October, the wettest month

66 mm

February, the driest month

Rain and snow by month

Millimetres

103 mm

JFMAMJJASOND

Rain alone by month

Millimetres

102 mm

JFMAMJJASOND

Snow

Snowfall: about 217 cm in a normal year

From October to April snow is likely; January is the peak, at about 52 cm.

217 cm

Snowfall a year

Snowier than 80% of Canadian towns

Days a year with 0.2 cm of snow or more

101

Days a year with 1 cm or more on the ground

11 cm

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

Snowfall by month

Centimetres

52 cm

JFMAMJJASOND

Snow on the ground by month

Centimetres at month’s end

11 cm

JFMAMJJASOND

Heating

Heating a home in Mont-Royal

93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.

4,281 heating degree days (below 18°C)a year, 1991–2020

2,247 growing degree days (above 5°C)a year, 1991–2020

Each day the mean sits under 18°C adds its shortfall; a year’s total is its heating degree days. By this count, homes here need less heating than 62% of Canadian towns.

Living here

Living with Mont-Royal’s climate

The averages read for the garden, the outdoors and the coldest and hottest days.

The garden window

On average the last spring frost comes around 29 April and the first autumn frost around 14 October: about 167 frost-free days between.

Get outside

Highs of 17–27°C with nights of 8°C or more come in May, Jun, Jul, Aug and Sep.

Parks & trails →

Wind chill

A wind chill below −20 is part of about 40 days a year here.

Humidex

About 50 days a year turn sultry, with the humidex past 30.

Storms and extremes

For blizzards, floods and wildfire, turn to Mont-Royal’s hazards page.

Flood & hazards →

Weather station

ECCC’s normals location: Montréal Trudeau (Airport)

Montréal Trudeau (Airport) is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.

Distance from the town	9.6 km south-west
Station altitude	36 m
Completeness	meets the WMO “3 and 5” rule
WMO standard normals	No
Coldest reading, 1991–2020	−31.8°C
Hottest reading, 1991–2020	36.6°C
Average wind	15.4 km/h on average, most often from the west
Next-nearest location	L'Acadie, 34 km

Compared with other towns

How Mont-Royal 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 Quebec.

July afternoons26.7°C

Mont-RoyalMedian Canadian town

18°C20°C22°C24°C26°C28°C

Warmer than 78% of Canadian towns4th warmest of 513 towns of 2,500+ in Quebec

January nights−13.5°C

Mont-RoyalMedian Canadian town

−30°C−25°C−20°C−15°C−10°C−5°C

Milder than 51% of Canadian towns

Rain and snow a year1,041 mm

Mont-RoyalMedian Canadian town

05001,0001,5002,000

Wetter than 74% of Canadian towns

Snowfall a year217 cm

Mont-RoyalMedian Canadian town

100200300400

Snowier than 80% of Canadian towns

Next door

Nearby towns’ climate

The nearest places on a normals location of their own: those that share Mont-Royal’s would only repeat its figures. No closer places have figures: these lie 16–19 km from Mont-Royal.

Town	July high	January low	Rain & snow
Mont-Royal Montréal Trudeau (Airport)	26.7°C	−13.5°C	1,041 mm
Brossard 16 km · L'Acadie	26.6°C about the same	−13.6°C about the same	1,041 mm
Montréal-Est 17 km · L'Assomption	26.6°C about the same	−16.0°C 2.5°C colder	1,041 mm

Month by month

Mont-Royal weather by month

Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.

Month	High	Low	Mean	Rain & snow	Snow
January	−5.0°C	−13.5°C	−9.2°C	86 mm	52 cm
February	−3.4°C	−12.4°C	−8.0°C	66 mm	47 cm
March	2.4°C	−6.5°C	−2.0°C	77 mm	37 cm
April	11.3°C	1.1°C	6.2°C	90 mm	15 cm
May	19.4°C	8.3°C	13.9°C	86 mm	0 cm
June	24.2°C	13.8°C	19.0°C	84 mm	0 cm
July	26.7°C	16.7°C	21.7°C	91 mm	0 cm
August	25.7°C	15.6°C	20.6°C	94 mm	0 cm
September	21.1°C	10.9°C	16.0°C	89 mm	0 cm
October	13.2°C	4.5°C	8.9°C	103 mm	1 cm
November	6.1°C	−1.7°C	2.3°C	84 mm	16 cm
December	−1.2°C	−8.7°C	−5.0°C	92 mm	48 cm
Year	11.7°C	2.3°C	7.0°C	1,041 mm	217 cm

Year to year

The most changeable month: January, give or take 3.0°C; the steadiest, June

Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −26.9°C in 1992 to 25.8°C in 2012.

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Mont-Royal’s numbers come from

Averages over 30 years, not a forecast.

Normals: the 1991–2020 Canadian Climate Normals at Montréal Trudeau (Airport), the closest ECCC location with twelve months of temperature normals.
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: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.

Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada

Questions about Mont-Royal’s climate

How warm does Mont-Royal get in summer?

Midsummer means July, with afternoons near 26.7°C on a typical day.

How cold does Mont-Royal get in winter?

Midwinter means January, when a typical night reaches −13.5°C.

How much rain and snow does Mont-Royal get?

Some 1,041 mm falls in a year. Most of it comes in October (103 mm), the least in February (66 mm).

How long does snow stay on the ground?

In a normal winter there are about 101 days with at least 1 cm of snow lying.

Are these figures for Mont-Royal itself?

Only indirectly: the readings are made at Montréal Trudeau (Airport), outside Mont-Royal.

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

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).