Digue - Sainte-Marthe-sur-le-Lac - Vue aérienne (1)

Photo: Gabriel Picard · CC BY-SA 4.0

Climate in Sainte-Marthe-sur-le-Lac · ECCC 1991–2020 normals

July in Sainte-Marthe-sur-le-Lac runs hotter than in 78% of Canadian towns

Midwinter brings lows of about −13.5°C. Winter and summer sit 40°C apart. Counting rain and snow together, it is wetter than 74% of Canadian towns. Homes need heating from October to April, the months averaging under 10°C.

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

The nearest ECCC normals location to Sainte-Marthe-sur-le-Lac is Montréal Trudeau (Airport), 17 km south-east, and every figure on this page is its.

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 Sainte-Marthe-sur-le-Lac 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 Sainte-Marthe-sur-le-Lac’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 Sainte-Marthe-sur-le-Lac 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

The frost season runs October to April, and January freezes nearly every night. On about 12 nights a year the air falls below −20°C.

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

October is the wettest month and February the driest. 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 Sainte-Marthe-sur-le-Lac

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

The count adds up, day by day, how far the mean temperature falls short of 18°C. By this count, homes here need less heating than 62% of Canadian towns.

Living here

Living with Sainte-Marthe-sur-le-Lac’s climate

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

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

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

Parks & trails →

Wind chill

Count on some 40 days a year when the wind makes it feel below −20.

Humidex

Expect around 50 sticky days a year with the humidex above 30.

Storms and extremes

What averages leave out, the floods and ice storms, is on Sainte-Marthe-sur-le-Lac’s hazards page.

Flood & hazards →

Weather station

ECCC’s normals location: Montréal Trudeau (Airport)

ECCC builds the Montréal Trudeau (Airport) normals from 3 stations’ records over 1991–2020, joined where one replaced another.

Distance from the town	17 km south-east
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	Lachute, 33 km

Compared with other towns

How Sainte-Marthe-sur-le-Lac 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 afternoons26.7°C

Sainte-Marthe-sur-le-LacMedian 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

Sainte-Marthe-sur-le-LacMedian 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

Sainte-Marthe-sur-le-LacMedian Canadian town

05001,0001,5002,000

Wetter than 74% of Canadian towns

Snowfall a year217 cm

Sainte-Marthe-sur-le-LacMedian Canadian town

100200300400

Snowier than 80% of Canadian towns

Next door

Nearby towns’ climate

Places around Sainte-Marthe-sur-le-Lac whose figures come from another normals location. The one place listed is 14 km from Sainte-Marthe-sur-le-Lac, the nearest with figures.

Town	July high	January low	Rain & snow
Sainte-Marthe-sur-le-Lac Montréal Trudeau (Airport)	26.7°C	−13.5°C	1,041 mm
Kanesatake 14 km · Lachute	26.5°C about the same	−14.7°C 1.2°C colder	1,178 mm

Month by month

Sainte-Marthe-sur-le-Lac 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	−5.0°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

From −26.9°C to 25.8°C: March’s coldest and warmest days since 1991

The month to count on least is January: one year in three its average strays more than 3.0°C from −9.2°C. June moves least, typically by 1.1°C.

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Sainte-Marthe-sur-le-Lac’s numbers come from

Averages over 30 years, not a forecast.

Normals: ECCC’s normals for Montréal Trudeau (Airport), 1991–2020, chosen as the nearest location with a full temperature record.
Comparisons: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
Not on this page: sunshine, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.

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

Questions about Sainte-Marthe-sur-le-Lac’s climate

How warm does Sainte-Marthe-sur-le-Lac get in summer?

Of all twelve months, July has the warmest afternoons, about 26.7°C.

How cold does Sainte-Marthe-sur-le-Lac get in winter?

In January, the coldest month, the typical low is −13.5°C.

How much rain and snow does Sainte-Marthe-sur-le-Lac get?

October is the wettest month at 103 mm and February the driest at 66 mm, for 1,041 mm over the year.

How long does snow stay on the ground?

Snow covers the ground, 1 cm or more, on about 101 days a year.

Are these figures for Sainte-Marthe-sur-le-Lac itself?

Not as such: Montréal Trudeau (Airport) is the nearest normals location, and Sainte-Marthe-sur-le-Lac has none.

Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Sainte-Marthe-sur-le-Lac →

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).