Climate in Saint-Lazare · ECCC 1991–2020 normals

Precipitation in Saint-Lazare tops that of 88% of Canadian towns: 1,178 mm a year

The coldest hours of a January night bottom out at −14.7°C on average. By January nights alone, it runs colder than 67% of Canadian towns. The seasons are far apart: from a winter night to a summer afternoon the average spans 41°C. From June to September, highs of 21–27°C make it easy to spend the day outdoors.

July afternoons: warmer than 65% of Canadian towns

January nights: colder than 67% of Canadian towns

Rain and snow a year: wetter than 88% of Canadian towns

These are not Saint-Lazare’s own readings: ECCC keeps no normals there, so the page uses Lachute, 31 km north-west.

July high

26.5°C

Typical Canadian town 25.5°C

January low

−14.7°C

Typical Canadian town −13.5°C

Rain & snow a year

1,178 mm

Typical Canadian town 883 mm

Snowfall a year

218 cm

Typical Canadian town 141 cm

Frost days

159

a year at 0°C or below

Frost-free days

143

12 May to 3 Oct

A year in Saint-Lazare at a glance

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

Jan−6°C−15°CColdest nightsSnowiest

Feb−4°C−14°C

Mar2°C−7°C

Apr11°C1°C

May19°C7°CLast frost ~12 May

Jun24°C13°C

Jul27°C15°CWarmest

Aug25°C14°C

Sep21°C10°C

Oct13°C4°CWettestFirst frost ~3 Oct

Nov now5°C−2°C

Dec−2°C−10°C

What stands out about Saint-Lazare’s climate

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

Wetter than 88% of Canadian townsAbout 1,178 mm of rain and melted snow a year; October is the wettest month and February the driest.Snowier than 84% of Canadian townsAbout 218 cm of snow falls in a year, most of it in January.A wider year than 75% of Canadian townsFrom January nights to July afternoons, the year spans 41.2°C.

A normal year

What a year in Saint-Lazare feels like

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

Winter

−4°C / −13°C

262 mm, with 157 cm of snow

Spring

11°C / 0°C

262 mm, with 43 cm of snow

Summer

25°C / 14°C

327 mm of rain and snow

Autumn

13°C / 4°C

327 mm, with 19 cm of snow: the wettest season

−20°

−10°

0°

10°

20°

30°

40°

−6°C−15°C

−4°C−14°C

2°C−7°C

11°C1°C

19°C7°C

24°C13°C

27°C15°C

25°C14°C

21°C10°C

13°C4°C

5°C−2°C

−2°C−10°C

JanFebMarAprMayJunJulAugSepOctNovDec

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

Frost & warm days

Frost on 159 days, 20°C on 115

The frost season runs October to May, and January freezes nearly every night. On about 19 nights a year the air falls below −20°C.

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

12 May 3 Oct

JanFebMarAprMayJunJulAugSepOctNovDec

159

Frost days a year (0°C or below)

Fewer frosts than 50% of Canadian towns

Days that stay below 0°C

Nights a year below −20°C

115

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

1,178 mm of precipitation in a typical year

October brings the most rain and snow; February, the least. About 143 days a year bring 1 mm or more.

1,178 mm

Rain and snow a year

Wetter than 88% of Canadian towns

956 mm

Of it as rain alone (81%)

120 mm

October, the wettest month

72 mm

February, the driest month

Rain and snow by month

Millimetres

120 mm

JFMAMJJASOND

Rain alone by month

Millimetres

118 mm

JFMAMJJASOND

Snow

About 218 cm of snow a year

From October to April snow is likely; January is the peak, at about 56 cm.

218 cm

Snowfall a year

Snowier than 84% of Canadian towns

Days a year with 0.2 cm of snow or more

128

Days a year with 1 cm or more on the ground

46 cm

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

Snowfall by month

Centimetres

56 cm

JFMAMJJASOND

Snow on the ground by month

Centimetres at month’s end

46 cm

JFMAMJJASOND

Heating

Heating a home in Saint-Lazare

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

4,489 heating degree days (below 18°C)a year, 1991–2020

2,105 growing degree days (above 5°C)a year, 1991–2020

Warm days count for nothing; each colder day adds how far its mean sits below 18°C.

Living here

Living with Saint-Lazare’s climate

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

The garden window

Gardens get from about 12 May to 3 October without frost, around 143 days in all.

Get outside

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

Parks & trails →

Storms and extremes

For blizzards, floods and wildfire, turn to Saint-Lazare’s hazards page.

Flood & hazards →

Weather station

ECCC’s normals location: Lachute

Lachute is one of the 450 places where ECCC publishes 1991–2020 normals.

Distance from the town	31 km north-west
Station altitude	91 m
Completeness	at least 20 years
WMO standard normals	No
Coldest reading, 1991–2020	−36.0°C
Hottest reading, 1991–2020	36.0°C
Next-nearest location	Montréal Trudeau (Airport), 32 km

Compared with other towns

How Saint-Lazare 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 afternoons26.5°C

Saint-LazareMedian Canadian town

18°C20°C22°C24°C26°C28°C

Warmer than 65% of Canadian towns

January nights−14.7°C

Saint-LazareMedian Canadian town

−30°C−25°C−20°C−15°C−10°C−5°C

Colder than 67% of Canadian towns

Rain and snow a year1,178 mm

Saint-LazareMedian Canadian town

05001,0001,5002,000

Wetter than 88% of Canadian towns

Snowfall a year218 cm

Saint-LazareMedian Canadian town

100200300400

Snowier than 84% of Canadian towns

Next door

Nearby towns’ climate

Places around Saint-Lazare whose figures come from another normals location.

Town	July high	January low	Rain & snow
Saint-Lazare Lachute	26.5°C	−14.7°C	1,178 mm
Hudson 6.3 km · Lachute	26.5°C about the same	−14.7°C about the same	1,178 mm
Saint-Clet 7.5 km · St-Anicet	26.7°C about the same	−13.0°C 1.7°C milder	1,047 mm
Vaudreuil-Dorion 8.3 km · Montréal Trudeau (Airport)	26.7°C about the same	−13.5°C 1.2°C milder	1,041 mm

Month by month

Saint-Lazare 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	−5.5°C	−14.7°C	−10.2°C	97 mm	56 cm
February	−3.6°C	−13.6°C	−8.3°C	72 mm	47 cm
March	2.4°C	−7.2°C	−2.5°C	74 mm	34 cm
April	11.0°C	0.5°C	5.9°C	100 mm	8 cm
May	19.4°C	7.4°C	13.3°C	89 mm	0 cm
June	24.1°C	12.6°C	18.4°C	111 mm	0 cm
July	26.5°C	15.1°C	20.5°C	112 mm	0 cm
August	25.4°C	14.3°C	19.8°C	104 mm	0 cm
September	20.8°C	9.9°C	15.4°C	114 mm	0 cm
October	12.8°C	3.7°C	8.4°C	120 mm	2 cm
November	5.2°C	−2.3°C	1.6°C	93 mm	17 cm
December	−1.9°C	−9.5°C	−6.0°C	94 mm	53 cm
Year	11.4°C	1.4°C	6.4°C	1,178 mm	218 cm

Year to year

March has run from −30.5°C to 26.5°C in thirty years

The month to count on least is January: one year in three its average strays more than 3.2°C from −10.2°C. August moves least, typically by 1.0°C.

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Saint-Lazare’s numbers come from

Averages over 30 years, not a forecast.

Normals: the 1991–2020 normals from ECCC for Lachute, its nearest location with complete 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 (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-Lazare’s climate

How warm does Saint-Lazare get in summer?

Expect highs near 26.5°C in July, the hottest month on average.

How cold does Saint-Lazare get in winter?

Lows sink to −14.7°C on an average January night.

How much rain and snow does Saint-Lazare get?

The yearly total is about 1,178 mm. October gets 120 mm, the most of any month; February gets 72 mm, the least.

How long does snow stay on the ground?

The ground is white, with 1 cm or more, on some 128 days a year.

Are these figures for Saint-Lazare itself?

The figures are ECCC’s for Lachute; Saint-Lazare has no normals station.

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

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).