Photo: Skeezix1000 · CC BY-SA 3.0

Climate in Gravenhurst · ECCC 1991–2020 normals

Snowy winters: about 278 cm a year in Gravenhurst, more than in 90% of Canadian towns

Expect July afternoons of about 25.3°C. It is a wet place: more rain and snow fall here than on 79% of Canadian towns. Winter and summer sit 41°C apart. Ice scrapers and block heaters earn their keep on roughly 175 days a year at 0°C or below.

July afternoons: cooler than 55% of Canadian towns

January nights: colder than 72% of Canadian towns

Rain and snow a year: wetter than 79% of Canadian towns

Environment and Climate Change Canada’s 1991–2020 normals, measured at Muskoka, 8.2 km north-east.

July high

25.3°C

Typical Canadian town 25.5°C

January low

−15.3°C

Typical Canadian town −13.5°C

Rain & snow a year

1,062 mm

Typical Canadian town 883 mm

Snowfall a year

278 cm

Typical Canadian town 141 cm

Frost days

175

a year at 0°C or below

A year in Gravenhurst at a glance

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

Jan−5°C−15°CColdest nightsSnowiest

Feb−3°C−15°C

Mar3°C−9°C

Apr10°C−2°C

May18°C5°C

Jun23°C10°C

Jul25°C13°CWarmest

Aug24°C12°C

Sep20°C8°C

Oct13°C2°CWettest

Nov now5°C−3°C

Dec−1°C−10°C

What stands out about Gravenhurst’s climate

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

Snowier than 90% of Canadian townsAbout 278 cm of snow falls in a year, most of it in January.Wetter than 79% of Canadian townsAbout 1,062 mm of rain and melted snow a year; October is the wettest month and February the driest.Colder than 72% of Canadian townsJanuary nights average −15.3°C, the coldest of the year.

A normal year

What a year in Gravenhurst feels like

Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.

Winter

−3°C / −13°C

235 mm, with 181 cm of snow

Spring

10°C / −2°C

244 mm, with 59 cm of snow

Summer

24°C / 12°C

267 mm of rain and snow

Autumn

13°C / 2°C

316 mm, with 38 cm of snow: the wettest season

−20°

−10°

0°

10°

20°

30°

−5°C−15°C

−3°C−15°C

3°C−9°C

10°C−2°C

18°C5°C

23°C10°C

25°C13°C

24°C12°C

20°C8°C

13°C2°C

5°C−3°C

−1°C−10°C

JanFebMarAprMayJunJulAugSepOctNovDec

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

Frost & warm days

Frost on 175 days, 20°C on 109

The frost season runs September to May, and January freezes nearly every night. Deep cold, under −20°C, comes on about 27 nights a year.

175

Frost days a year (0°C or below)

More frosts than 60% of Canadian towns

Days that stay below 0°C

Nights a year below −20°C

109

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 1,062 mm of rain and snow a year

The most falls in October, the least in February. About 141 days a year bring 1 mm or more.

1,062 mm

Rain and snow a year

Wetter than 79% of Canadian towns

111 mm

October, the wettest month

56 mm

February, the driest month

Rain and snow by month

Millimetres

111 mm

JFMAMJJASOND

Snow

278 cm of snow in a typical year

The snow season runs October to May; January brings the most, about 67 cm.

278 cm

Snowfall a year

Snowier than 90% of Canadian towns

Days a year with 0.2 cm of snow or more

Snowfall by month

Centimetres

67 cm

JFMAMJJASOND

Muskoka publishes no full year of snowfall, so these figures come from Haliburton, 67 km away.

Heating

Heating a home in Gravenhurst

90% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.

4,746 heating degree days (below 18°C)a year, 1991–2020

1,828 growing degree days (above 5°C)a year, 1991–2020

ECCC sums, over the year, how many degrees each day’s average falls short of 18°C.

Living here

Living with Gravenhurst’s climate

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

Get outside

Plan time outside for Jun, Jul and Aug: highs of 17–27°C and nights no colder than 8°C.

Parks & trails →

Storms and extremes

For blizzards, floods and wildfire, turn to Gravenhurst’s hazards page.

Flood & hazards →

Weather station

ECCC’s normals location: Muskoka

Muskoka is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.

Distance from the town	8.2 km north-east
Station altitude	282 m
Completeness	meets the WMO “3 and 5” rule
WMO standard normals	No
Snowfall from	Haliburton, 67 km
Coldest reading, 1991–2020	−40.0°C
Hottest reading, 1991–2020	35.2°C
Average wind	10.7 km/h
Next-nearest location	Lagoon City, 42 km

Compared with other towns

How Gravenhurst 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 Ontario.

July afternoons25.3°C

GravenhurstMedian Canadian town

20°C22°C24°C26°C28°C30°C

Cooler than 55% of Canadian towns

January nights−15.3°C

GravenhurstMedian Canadian town

−25°C−20°C−15°C−10°C−5°C

Colder than 72% of Canadian towns

Rain and snow a year1,062 mm

GravenhurstMedian Canadian town

05001,0001,5002,000

Wetter than 79% of Canadian towns

Snowfall a year278 cm

GravenhurstMedian Canadian town

0100200300400

Snowier than 90% of Canadian towns

Next door

Nearby towns’ climate

The nearest places on a normals location of their own: those that share Gravenhurst’s would only repeat its figures. The one place listed is 28 km from Gravenhurst, the nearest with figures.

Town	July high	January low	Rain & snow
Gravenhurst Muskoka	25.3°C	−15.3°C	1,062 mm
Severn 28 km · Lagoon City	24.5°C 0.8°C cooler	−12.6°C 2.7°C milder	1,062 mm

Month by month

Gravenhurst weather by month

Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.

Month	High	Low	Mean	Rain & snow	Snow
January	−4.6°C	−15.3°C	−10.0°C	92 mm	67 cm
February	−3.1°C	−15.1°C	−9.1°C	56 mm	50 cm
March	2.5°C	−9.0°C	−3.3°C	72 mm	36 cm
April	10.4°C	−1.6°C	4.4°C	79 mm	21 cm
May	18.4°C	4.7°C	11.5°C	93 mm	2 cm
June	23.1°C	10.1°C	16.7°C	86 mm	0 cm
July	25.3°C	12.8°C	19.1°C	100 mm	0 cm
August	24.4°C	11.8°C	18.1°C	82 mm	0 cm
September	20.1°C	7.5°C	13.8°C	102 mm	0 cm
October	12.5°C	2.2°C	7.4°C	111 mm	5 cm
November	5.1°C	−3.4°C	0.9°C	103 mm	33 cm
December	−1.0°C	−9.7°C	−5.4°C	87 mm	65 cm
Year	11.1°C	−0.4°C	5.3°C	1,062 mm	278 cm

Year to year

A March here can run from −31.9°C to 26.7°C

Two years in three, January’s average falls within 3.3°C of its normal of −10.0°C; June keeps to within 1.2°C.

−50°

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Gravenhurst’s numbers come from

Averages over 30 years, not a forecast.

Normals: 1991–2020 normals for Muskoka from ECCC’s climate data site, the nearest location with every month of temperature.
Other locations: a location missing months of precipitation or snow is filled from the nearest that has them all, never mixed month by month.
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: 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 Gravenhurst’s climate

How warm does Gravenhurst get in summer?

In July, the warmest month, the typical high is 25.3°C.

How cold does Gravenhurst get in winter?

The coldest nights come in January, averaging −15.3°C.

How much rain and snow does Gravenhurst get?

Precipitation totals 1,062 mm a year, with October the wettest month (111 mm) and February the driest (56 mm).

Are these figures for Gravenhurst itself?

Yes: they are ECCC’s 1991–2020 normals for Muskoka, a location inside Gravenhurst.

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

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).