Climate in Saint-Roch · ECCC 1991–2020 normals

Wet weather: 1,216 mm of rain and snow a year falls on Saint-Roch, more than on 90% of Canadian towns

Deep winter brings January lows near −15.6°C. In January, nights here are colder than in 73% of Canadian towns. Seasons differ by 41°C, from the coldest nights to the warmest afternoons. An umbrella or a shovel earns its place on about 142 days a year with 1 mm or more.

July afternoons: cooler than 58% of Canadian towns

January nights: colder than 73% of Canadian towns

Rain and snow a year: wetter than 90% of Canadian towns

Saint-Roch has no ECCC normals station of its own: every figure here comes from Ste-Foy (U. Laval), 7.9 km south-west.

July high

25.1°C

Typical Canadian town 25.5°C

January low

−15.6°C

Typical Canadian town −13.5°C

Rain & snow a year

1,216 mm

Typical Canadian town 883 mm

Snowfall a year

299 cm

Typical Canadian town 141 cm

Frost days

162

a year at 0°C or below

A year in Saint-Roch at a glance

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

Jan−7°C−16°CColdest nights

Feb−5°C−14°C

Mar1°C−8°C

Apr8°C−1°C

May18°C7°C

Jun23°C12°C

Jul25°C15°CWarmestWettest

Aug24°C14°C

Sep19°C9°C

Oct11°C3°C

Nov now4°C−3°C

Dec−3°C−10°CSnowiest

What stands out about Saint-Roch’s climate

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

Snowier than 93% of Canadian townsAbout 299 cm of snow falls in a year, most of it in December.Wetter than 90% of Canadian townsAbout 1,216 mm of rain and melted snow a year; July is the wettest month and March the driest.Colder than 73% of Canadian townsJanuary nights average −15.6°C, the coldest of the year.

A normal year

What a year in Saint-Roch feels like

Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.

Winter

−5°C / −13°C

261 mm, with 209 cm of snow

Spring

9°C / −1°C

270 mm, with 63 cm of snow

Summer

24°C / 13°C

366 mm of rain and snow, the wettest season

Autumn

12°C / 3°C

319 mm, with 26 cm of snow

−20°

−10°

0°

10°

20°

30°

−7°C−16°C

−5°C−14°C

1°C−8°C

8°C−1°C

18°C7°C

23°C12°C

25°C15°C

24°C14°C

19°C9°C

11°C3°C

4°C−3°C

−3°C−10°C

JanFebMarAprMayJunJulAugSepOctNovDec

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

Frost & warm days

About 162 frosts and 101 warm days a year

Frost comes from October to May; in January almost every night freezes. On about 21 nights a year the air falls below −20°C.

162

Frost days a year (0°C or below)

More frosts than 54% of Canadian towns

Days that stay below 0°C

Nights a year below −20°C

101

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 1,216 mm of rain and snow a year

July brings the most rain and snow; March, the least.

1,216 mm

Rain and snow a year

Wetter than 90% of Canadian towns

919 mm

Of it as rain alone (76%)

129 mm

July, the wettest month

78 mm

March, the driest month

Rain and snow by month

Millimetres

129 mm

JFMAMJJASOND

Rain alone by month

Millimetres

129 mm

JFMAMJJASOND

Precipitation and snowfall: Lauzon, 9.9 km away (Ste-Foy (U. Laval) records no complete year of either).

Snow

Snowfall: about 299 cm in a normal year

Expect snow from October to April, with about 77 cm in December, the snowiest month.

299 cm

Snowfall a year

Snowier than 93% of Canadian towns

Days a year with 0.2 cm of snow or more

Snowfall by month

Centimetres

77 cm

JFMAMJJASOND

Heating

Heating a home in Saint-Roch

92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.

4,823 heating degree days (below 18°C)a year, 1991–2020

1,905 growing degree days (above 5°C)a year, 1991–2020

Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year.

Living here

Living with Saint-Roch’s climate

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

Get outside

The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.

Parks & trails →

Wind chill

Roughly 39 days a year feel colder than −20 in the wind.

Humidex

The air feels heavier than 30 on the humidex for about 31 days a year.

Storms and extremes

What averages leave out, the floods and ice storms, is on Saint-Roch’s hazards page.

Flood & hazards →

Weather station

ECCC’s normals location: Ste-Foy (U. Laval)

Behind the 1991–2020 normals for Ste-Foy (U. Laval) are 2 stations, which ECCC combines into one record.

Distance from the town	7.9 km south-west
Station altitude	79 m
Completeness	meets the WMO “3 and 5” rule
WMO standard normals	No
Precipitation from	Lauzon, 9.9 km
Coldest reading, 1991–2020	−33.8°C
Hottest reading, 1991–2020	35.3°C
Average wind	9.9 km/h on average, most often from the south-west
Next-nearest location	Lauzon, 9.9 km

Compared with other towns

How Saint-Roch compares

Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Quebec.

July afternoons25.1°C

Saint-RochMedian Canadian town

18°C20°C22°C24°C26°C28°C

Cooler than 58% of Canadian towns

January nights−15.6°C

Saint-RochMedian Canadian town

−30°C−25°C−20°C−15°C−10°C−5°C

Colder than 73% of Canadian towns

Rain and snow a year1,216 mm

Saint-RochMedian Canadian town

05001,0001,5002,000

Wetter than 90% of Canadian towns

Snowfall a year299 cm

Saint-RochMedian Canadian town

100200300400

Snowier than 93% of Canadian towns

Next door

Nearby towns’ climate

The nearest places on a normals location of their own: those that share Saint-Roch’s would only repeat its figures. The nearest places to Saint-Roch with figures are 9–15 km away.

Town	July high	January low	Rain & snow
Saint-Roch Ste-Foy (U. Laval)	25.1°C	−15.6°C	1,216 mm
L'Ancienne-Lorette 9.4 km · Québec Jean Lesage (Airport)	25.0°C about the same	−16.7°C 1.1°C colder	1,173 mm
Sainte-Pétronille 9.4 km · Lauzon	24.9°C about the same	−16.6°C 1.0°C colder	1,216 mm

Month by month

Saint-Roch 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	−7.1°C	−15.6°C	−11.3°C	80 mm	62 cm
February	−4.8°C	−14.4°C	−9.6°C	80 mm	71 cm
March	0.8°C	−8.4°C	−3.8°C	78 mm	51 cm
April	8.4°C	−0.6°C	4.0°C	95 mm	12 cm
May	17.5°C	6.5°C	12.0°C	98 mm	0 cm
June	22.5°C	11.7°C	17.1°C	120 mm	0 cm
July	25.1°C	14.8°C	20.0°C	129 mm	0 cm
August	24.2°C	13.9°C	19.1°C	117 mm	0 cm
September	19.4°C	9.2°C	14.3°C	123 mm	0 cm
October	11.1°C	3.2°C	7.2°C	112 mm	2 cm
November	4.0°C	−2.7°C	0.7°C	84 mm	24 cm
December	−3.2°C	−10.2°C	−6.7°C	101 mm	77 cm
Year	9.8°C	0.6°C	5.2°C	1,216 mm	299 cm

Year to year

A March here can run from −27.7°C to 20.4°C

January is the least predictable month: about two years in three its average lands within 2.8°C of the normal, −11.3°C. August is the steadiest, within 1.0°C.

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Saint-Roch’s numbers come from

Averages over 30 years, not a forecast.

Normals: the 1991–2020 Canadian Climate Normals at Ste-Foy (U. Laval), the closest ECCC location with twelve months of temperature normals.
Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.

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

Questions about Saint-Roch’s climate

How warm does Saint-Roch get in summer?

A normal July afternoon tops out at about 25.1°C, the year’s high point.

How cold does Saint-Roch get in winter?

January nights average −15.6°C, the coldest of the year.

How much rain and snow does Saint-Roch get?

A normal year brings 1,216 mm, snow included as water: July is wettest at 129 mm, March driest at 78 mm.

Are these figures for Saint-Roch itself?

They describe Ste-Foy (U. Laval), the nearest normals location, rather than Saint-Roch itself.

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

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).