Photo: P199 · CC BY-SA 3.0

Climate in Seguin · ECCC 1991–2020 normals

Precipitation in Seguin tops that of 79% of Canadian towns: 1,062 mm a year

January nights here settle around −15.3°C. The wettest month is October; the driest is February. Winter nights are cold: in January they are colder than in 72% of Canadian towns. Expect about 175 frosty starts a year, days when the air falls to freezing.

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

Every figure here comes from Muskoka, 57 km south-east; ECCC has no normals closer to Seguin, so they describe the wider area.

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

Frost days

175

a year at 0°C or below

A year in Seguin at a glance

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

Jan−5°C−15°CColdest nights

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 Seguin’s climate

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

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 Seguin feels like

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

Winter

−3°C / −13°C

235 mm of rain and snow

Spring

10°C / −2°C

244 mm of rain and snow

Summer

24°C / 12°C

267 mm of rain and snow

Autumn

13°C / 2°C

316 mm of rain and 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. Some 27 nights a year drop under −20°C.

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

Some 141 days a year see 1 mm of rain or snow 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

Heating

Heating a home in Seguin

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

A heating degree day is one degree of shortfall below 18°C for one day, summed over the year.

Living here

Living with Seguin’s climate

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

Get outside

Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul and Aug.

Parks & trails →

Storms and extremes

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

Flood & hazards →

Weather station

ECCC’s normals location: Muskoka

Behind the 1991–2020 normals for Muskoka are 3 stations, which ECCC combines into one record.

Distance from the town	57 km south-east
Station altitude	282 m
Completeness	meets the WMO “3 and 5” rule
WMO standard normals	No
Snowfall from	No location within 100 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, 99 km

Compared with other towns

How Seguin 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

SeguinMedian Canadian town

20°C22°C24°C26°C28°C30°C

Cooler than 55% of Canadian towns

January nights−15.3°C

SeguinMedian 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

SeguinMedian Canadian town

05001,0001,5002,000

Wetter than 79% of Canadian towns

Next door

Nearby towns’ climate

Nearby places read from a different ECCC location (places on Seguin’s own would show the same figures). Seguin has few close neighbours with figures, so the list reaches 35–63 km out.

Town	July high	January low	Rain & snow
Seguin Muskoka	25.3°C	−15.3°C	1,062 mm
Whitestone 35 km · North Bay	24.3°C 1.0°C cooler	−17.3°C 2.0°C colder	1,020 mm
Penetanguishene 63 km · Collingwood	25.3°C about the same	−8.7°C 6.6°C milder	1,062 mm

Month by month

Seguin weather by month

Average daily high and low, mean temperature and precipitation by month, 1991–2020.

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

Year to year

In March, anything 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 Seguin’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.
Comparisons: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
Not on this page: snow, with no complete snowfall normals within 100 km, sunshine, which ECCC published for no location, and any height adjustment.

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

Questions about Seguin’s climate

How warm does Seguin get in summer?

Expect highs near 25.3°C in July, the hottest month on average.

How cold does Seguin get in winter?

Midwinter means January, when a typical night reaches −15.3°C.

How much rain and snow does Seguin get?

Over twelve months, rain and melted snow come to 1,062 mm; the range runs from 56 mm in February to 111 mm in October.

Are these figures for Seguin itself?

No. The nearest normals are those of Muskoka, a long way from Seguin.

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

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).