Photo: P199 · CC BY-SA 3.0

Climate in Grenville-sur-la-Rouge · ECCC 1991–2020 normals

Grenville-sur-la-Rouge is wetter than 88% of Canadian towns: 1,178 mm of rain and snow a year

On a normal January night the air cools to about −14.7°C. 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. Garden chairs stay out from June to September, the months with highs of 21–27°C.

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

Grenville-sur-la-Rouge has no ECCC normals station of its own: every figure here comes from Lachute, 24 km east.

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 Grenville-sur-la-Rouge 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 Grenville-sur-la-Rouge’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 Grenville-sur-la-Rouge 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

159 frost days and 115 days above 20°C a year

Frost comes from October to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 19 nights a year.

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

Rain and melted snow: about 1,178 mm a year

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

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

Snow falls from October to April, most of all in January (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 Grenville-sur-la-Rouge

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

Each day the mean sits under 18°C adds its shortfall; a year’s total is its heating degree days.

Living here

Living with Grenville-sur-la-Rouge’s climate

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

The garden window

From about 12 May to 3 October the garden is usually clear of frost, some 143 days.

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

Thirty-year normals hide the storms and the extremes: the hazards page has Grenville-sur-la-Rouge’s risks.

Flood & hazards →

Weather station

ECCC’s normals location: Lachute

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

Distance from the town	24 km east
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	St-Jovite, 48 km

Compared with other towns

How Grenville-sur-la-Rouge 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 afternoons26.5°C

Grenville-sur-la-RougeMedian Canadian town

18°C20°C22°C24°C26°C28°C

Warmer than 65% of Canadian towns

January nights−14.7°C

Grenville-sur-la-RougeMedian 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

Grenville-sur-la-RougeMedian Canadian town

05001,0001,5002,000

Wetter than 88% of Canadian towns

Snowfall a year218 cm

Grenville-sur-la-RougeMedian Canadian town

100200300400

Snowier than 84% of Canadian towns

Next door

Nearby towns’ climate

Places around Grenville-sur-la-Rouge whose figures come from another normals location. The nearest places to Grenville-sur-la-Rouge with figures are 29–39 km away.

Town	July high	January low	Rain & snow
Grenville-sur-la-Rouge Lachute	26.5°C	−14.7°C	1,178 mm
Wendover 29 km · Angers	26.2°C about the same	−16.5°C 1.8°C colder	1,178 mm
Alexandria 39 km · Cornwall	27.3°C 0.8°C warmer	−11.8°C 2.9°C milder	1,006 mm

Month by month

Grenville-sur-la-Rouge weather by month

Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the snowfall.

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

The month with the widest range: March, −30.5°C to 26.5°C

Bars run from each month’s record low to its record high over 1991–2020; January is the month whose average wanders most from year to year (±3.2°C around −10.2°C), August the one that wanders least (±1.0°C).

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Grenville-sur-la-Rouge’s numbers come from

Averages over 30 years, not a forecast.

Normals: Environment and Climate Change Canada’s 1991–2020 normals, Lachute: the nearest of its locations with every month’s temperatures.
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 Grenville-sur-la-Rouge’s climate

How warm does Grenville-sur-la-Rouge get in summer?

The year’s warmest days come in July, with highs averaging 26.5°C.

How cold does Grenville-sur-la-Rouge get in winter?

January nights average −14.7°C, the coldest of the year.

How much rain and snow does Grenville-sur-la-Rouge get?

Rain and snow, with snow counted as water, total 1,178 mm a year; October leads with 120 mm and February trails with 72 mm.

How long does snow stay on the ground?

Snow lies on the ground for about 128 days in a normal year.

Are these figures for Grenville-sur-la-Rouge itself?

They describe Lachute, the nearest normals location, rather than Grenville-sur-la-Rouge itself.

Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Grenville-sur-la-Rouge →

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).