Maison Janotte, 1760, Saint-Marc-Sur-Richlieu, Canada 10 3 2015

Photo: Diane Snider · CC BY-SA 4.0

Climate in Saint-Marc-sur-Richelieu · ECCC 1991–2020 normals

Wet weather: 1,109 mm of rain and snow a year falls on Saint-Marc-sur-Richelieu, more than on 82% of Canadian towns

Deep winter brings January lows near −14.8°C. Its January nights bite harder than in 71% of Canadian towns. Expect the most rain and snow in August and the least in February. Heating does most of its work from October to April, in months below 10°C on average.

July afternoons: warmer than 61% of Canadian towns

January nights: colder than 71% of Canadian towns

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

Borrowed figures: Saint-Marc-sur-Richelieu has no normals station, so these come from Fleury, 21 km north-east.

July high

26.0°C

Typical Canadian town 25.5°C

January low

−14.8°C

Typical Canadian town −13.5°C

Rain & snow a year

1,109 mm

Typical Canadian town 883 mm

Snowfall a year

202 cm

Typical Canadian town 141 cm

Frost days

161

a year at 0°C or below

Frost-free days

136

12 May to 27 Sep

A year in Saint-Marc-sur-Richelieu at a glance

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

Jan−6°C−15°CColdest nights

Feb−4°C−14°C

Mar2°C−7°C

Apr11°C1°C

May19°C7°CLast frost ~12 May

Jun24°C13°C

Jul26°C15°CWarmest

Aug25°C14°CWettest

Sep21°C9°CFirst frost ~27 Sep

Oct13°C4°C

Nov now6°C−2°C

Dec−2°C−9°CSnowiest

What stands out about Saint-Marc-sur-Richelieu’s climate

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

Wetter than 82% of Canadian townsAbout 1,109 mm of rain and melted snow a year; August is the wettest month and February the driest.A wider year than 73% of Canadian townsFrom January nights to July afternoons, the year spans 40.8°C.Snowier than 72% of Canadian townsAbout 202 cm of snow falls in a year, most of it in December.

A normal year

What a year in Saint-Marc-sur-Richelieu feels like

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

Winter

−4°C / −13°C

227 mm, with 137 cm of snow

Spring

10°C / 0°C

265 mm, with 52 cm of snow

Summer

25°C / 14°C

322 mm of rain and snow, the wettest season

Autumn

13°C / 4°C

295 mm, with 14 cm of snow

−20°

−10°

0°

10°

20°

30°

−6°C−15°C

−4°C−14°C

2°C−7°C

11°C1°C

19°C7°C

24°C13°C

26°C15°C

25°C14°C

21°C9°C

13°C4°C

6°C−2°C

−2°C−9°C

JanFebMarAprMayJunJulAugSepOctNovDec

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

Frost & warm days

Frost on 161 days, 20°C on 115

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

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

12 May 27 Sep

JanFebMarAprMayJunJulAugSepOctNovDec

161

Frost days a year (0°C or below)

More frosts than 52% 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

About 1,109 mm of rain and snow a year

Some 145 days a year see 1 mm of rain or snow or more.

1,109 mm

Rain and snow a year

Wetter than 82% of Canadian towns

899 mm

Of it as rain alone (81%)

114 mm

August, the wettest month

61 mm

February, the driest month

Rain and snow by month

Millimetres

114 mm

JFMAMJJASOND

Rain alone by month

Millimetres

114 mm

JFMAMJJASOND

Snow

About 202 cm of snow a year

Expect snow from October to April, with about 49 cm in December, the snowiest month.

202 cm

Snowfall a year

Snowier than 72% of Canadian towns

Days a year with 0.2 cm of snow or more

106

Days a year with 1 cm or more on the ground

27 cm

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

Snowfall by month

Centimetres

49 cm

JFMAMJJASOND

Snow on the ground by month

Centimetres at month’s end

27 cm

JFMAMJJASOND

Heating

Heating a home in Saint-Marc-sur-Richelieu

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

4,512 heating degree days (below 18°C)a year, 1991–2020

2,072 growing degree days (above 5°C)a year, 1991–2020

Think of it as a year’s worth of daily shortfalls below 18°C, added up.

Living here

Living with Saint-Marc-sur-Richelieu’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 12 May and the first autumn frost around 27 September: about 136 frost-free days between.

Get outside

For long days outdoors, Jun, Jul, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.

Parks & trails →

Storms and extremes

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

Flood & hazards →

Weather station

ECCC’s normals location: Fleury

Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Fleury.

Distance from the town	21 km north-east
Station altitude	31 m
Completeness	at least 20 years
WMO standard normals	No
Coldest reading, 1991–2020	−39.0°C
Hottest reading, 1991–2020	35.1°C
Next-nearest location	L'Assomption, 23 km

Compared with other towns

How Saint-Marc-sur-Richelieu 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 afternoons26.0°C

Saint-Marc-sur-RichelieuMedian Canadian town

18°C20°C22°C24°C26°C28°C

Warmer than 61% of Canadian towns

January nights−14.8°C

Saint-Marc-sur-RichelieuMedian Canadian town

−30°C−25°C−20°C−15°C−10°C−5°C

Colder than 71% of Canadian towns

Rain and snow a year1,109 mm

Saint-Marc-sur-RichelieuMedian Canadian town

05001,0001,5002,000

Wetter than 82% of Canadian towns

Snowfall a year202 cm

Saint-Marc-sur-RichelieuMedian Canadian town

100200300400

Snowier than 72% of Canadian towns

Next door

Nearby towns’ climate

Nearby places read from a different ECCC location (places on Saint-Marc-sur-Richelieu’s own would show the same figures).

Town	July high	January low	Rain & snow
Saint-Marc-sur-Richelieu Fleury	26.0°C	−14.8°C	1,109 mm
Saint-Charles-sur-Richelieu 4.6 km · Fleury	26.0°C about the same	−14.8°C about the same	1,109 mm
Saint-Amable 8.4 km · L'Assomption	26.6°C 0.6°C warmer	−16.0°C 1.2°C colder	1,109 mm

Month by month

Saint-Marc-sur-Richelieu 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	−5.8°C	−14.8°C	−10.5°C	81 mm	45 cm
February	−3.8°C	−13.6°C	−8.6°C	61 mm	43 cm
March	1.8°C	−7.3°C	−2.7°C	71 mm	38 cm
April	10.5°C	0.6°C	5.8°C	96 mm	13 cm
May	19.1°C	7.4°C	13.2°C	98 mm	under 1 cm
June	23.9°C	12.7°C	18.4°C	102 mm	0 cm
July	26.0°C	14.9°C	20.2°C	106 mm	0 cm
August	25.0°C	13.7°C	19.3°C	114 mm	0 cm
September	20.7°C	9.4°C	15.1°C	97 mm	0 cm
October	13.0°C	3.6°C	8.4°C	108 mm	2 cm
November	5.5°C	−2.0°C	1.9°C	90 mm	12 cm
December	−2.0°C	−9.3°C	−5.9°C	85 mm	49 cm
Year	11.2°C	1.3°C	6.2°C	1,109 mm	202 cm

Year to year

The month with the widest range: March, −31.0°C to 25.5°C

January is the least predictable month: about two years in three its average lands within 3.1°C of the normal, −10.5°C. August is the steadiest, within 0.9°C.

−50°

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Saint-Marc-sur-Richelieu’s numbers come from

Averages over 30 years, not a forecast.

Normals: ECCC’s normals for Fleury, 1991–2020, chosen as the nearest location with a full temperature record.
Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
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 Saint-Marc-sur-Richelieu’s climate

How warm does Saint-Marc-sur-Richelieu get in summer?

Highs reach 26.0°C on an average July day; no month is warmer.

How cold does Saint-Marc-sur-Richelieu get in winter?

Expect nights around −14.8°C in January; no month is colder.

How much rain and snow does Saint-Marc-sur-Richelieu get?

About 1,109 mm a year, rain and melted snow together. August is the wettest month (114 mm) and February the driest (61 mm).

How long does snow stay on the ground?

A layer of at least 1 cm stays down on about 106 days a year.

Are these figures for Saint-Marc-sur-Richelieu itself?

They are the closest available: the normals for Fleury, since Saint-Marc-sur-Richelieu has none.

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

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).