Photo: Richard apple · CC BY-SA 3.0

Climate in Ashfield-Colborne-Wawanosh · ECCC 1991–2020 normals

Midwinter lows in Ashfield-Colborne-Wawanosh stay above those of 83% of Canadian towns

High summer brings afternoon highs near 24.4°C. A year here swings 32°C from midwinter lows to midsummer highs. By precipitation alone, it ranks wetter than 70% of Canadian towns. Long walks are most pleasant from June to September, when afternoons reach 21–24°C.

July afternoons: cooler than 67% of Canadian towns

January nights: milder than 83% of Canadian towns

Rain and snow a year: wetter than 70% of Canadian towns

Figures: ECCC’s 1991–2020 normals at Goderich (11 km south-west).

July high

24.4°C

Typical Canadian town 25.5°C

January low

−7.8°C

Typical Canadian town −13.5°C

Rain & snow a year

1,035 mm

Typical Canadian town 883 mm

Snowfall a year

152 cm

Typical Canadian town 141 cm

Frost days

134

a year at 0°C or below

A year in Ashfield-Colborne-Wawanosh at a glance

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

Jan−1°C−8°CSnowiest

Feb−1°C−8°CColdest nights

Mar4°C−4°C

Apr11°C1°C

May17°C7°C

Jun22°C12°CWettest

Jul24°C15°CWarmest

Aug24°C15°C

Sep21°C11°C

Oct14°C6°C

Nov now7°C1°C

Dec2°C−4°C

What stands out about Ashfield-Colborne-Wawanosh’s climate

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

A narrower year than 88% of Canadian townsFrom January nights to July afternoons, the year spans 32.2°C.Milder than 83% of Canadian townsJanuary nights average −7.8°C; February is colder still.Wetter than 70% of Canadian townsAbout 1,035 mm of rain and melted snow a year; June is the wettest month and March the driest.

A normal year

What a year in Ashfield-Colborne-Wawanosh feels like

Each season’s and each month’s usual high and low, 1991–2020.

Winter

0°C / −7°C

255 mm, with 111 cm of snow

Spring

11°C / 1°C

240 mm, with 25 cm of snow

Summer

24°C / 14°C

281 mm of rain and snow, the wettest season

Autumn

14°C / 6°C

258 mm, with 16 cm of snow

−15°

−10°

−5°

0°

5°

10°

15°

20°

25°

30°

−1°C−8°C

4°C−4°C

11°C1°C

17°C7°C

22°C12°C

24°C15°C

21°C11°C

14°C6°C

7°C1°C

2°C−4°C

JanFebMarAprMayJunJulAugSepOctNovDec

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

Frost & warm days

134 frost days and 109 days above 20°C a year

Frost comes from October to May; in January almost every night freezes. Some 4 days a year climb past 30°C.

134

Frost days a year (0°C or below)

Fewer frosts than 77% 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

Rain and melted snow: about 1,035 mm a year

June is the wettest month and March the driest. About 140 days a year bring 1 mm or more.

1,035 mm

Rain and snow a year

Wetter than 70% of Canadian towns

100 mm

June, the wettest month

68 mm

March, the driest month

Rain and snow by month

Millimetres

100 mm

JFMAMJJASOND

Goderich publishes no full year of precipitation, so these figures come from Mount Forest, 72 km away.

Snow

About 152 cm of snow a year

From October to April snow is likely; January is the peak, at about 43 cm.

152 cm

Snowfall a year

Snowier than 58% of Canadian towns

Days a year with 0.2 cm of snow or more

Snowfall by month

Centimetres

43 cm

JFMAMJJASOND

Goderich publishes no full year of snowfall, so these figures come from Strathroy-Mullifarry, 99 km away.

Heating

Heating a home in Ashfield-Colborne-Wawanosh

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

3,915 heating degree days (below 18°C)a year, 1991–2020

2,118 growing degree days (above 5°C)a year, 1991–2020

Warm days count for nothing; each colder day adds how far its mean sits below 18°C. In heating terms, homes need less heating than 76% of Canadian towns.

Living here

Living with Ashfield-Colborne-Wawanosh’s climate

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

Get outside

The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.

Parks & trails →

Wind chill

The wind chill passes −20 on about 17 days in a normal year.

Humidex

Muggy heat with a humidex over 30 arrives on about 44 days a year.

Storms and extremes

Thirty-year normals hide the storms and the extremes: the hazards page has Ashfield-Colborne-Wawanosh’s risks.

Flood & hazards →

Weather station

ECCC’s normals location: Goderich

Goderich is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.

Distance from the town	11 km south-west
Station altitude	214 m
Completeness	meets the WMO “3 and 5” rule
WMO standard normals	No
Precipitation from	Mount Forest, 72 km
Snowfall from	Strathroy-Mullifarry, 99 km
Coldest reading, 1991–2020	−31.1°C
Hottest reading, 1991–2020	34.4°C
Average wind	16.8 km/h on average, most often from the south
Next-nearest location	Mount Forest, 72 km

Compared with other towns

How Ashfield-Colborne-Wawanosh 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 afternoons24.4°C

Ashfield-Colborne-WawanoshMedian Canadian town

20°C22°C24°C26°C28°C30°C

Cooler than 67% of Canadian towns

January nights−7.8°C

Ashfield-Colborne-WawanoshMedian Canadian town

−25°C−20°C−15°C−10°C−5°C

Milder than 83% of Canadian towns

Rain and snow a year1,035 mm

Ashfield-Colborne-WawanoshMedian Canadian town

05001,0001,5002,000

Wetter than 70% of Canadian towns

Snowfall a year152 cm

Ashfield-Colborne-WawanoshMedian Canadian town

0100200300400

Snowier than 58% of Canadian towns

Next door

Nearby towns’ climate

The nearest places on a normals location of their own: those that share Ashfield-Colborne-Wawanosh’s would only repeat its figures. Distances here run 43–55 km: that is how far the nearest places with figures are from Ashfield-Colborne-Wawanosh.

Town	July high	January low	Rain & snow
Ashfield-Colborne-Wawanosh Goderich	24.4°C	−7.8°C	1,035 mm
Howick 43 km · Mount Forest	25.1°C 0.7°C warmer	−10.9°C 3.1°C colder	1,035 mm
Mitchell 53 km · London	26.6°C 2.2°C warmer	−9.1°C 1.3°C colder	962 mm

Month by month

Ashfield-Colborne-Wawanosh 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	−1.3°C	−7.8°C	−4.6°C	92 mm	43 cm
February	−0.6°C	−8.0°C	−4.3°C	73 mm	32 cm
March	3.8°C	−4.4°C	−0.3°C	68 mm	20 cm
April	10.6°C	1.1°C	5.9°C	74 mm	5 cm
May	17.4°C	7.1°C	12.3°C	98 mm	under 1 cm
June	22.4°C	12.4°C	17.4°C	100 mm	0 cm
July	24.4°C	14.8°C	19.6°C	98 mm	0 cm
August	24.0°C	14.5°C	19.3°C	84 mm	0 cm
September	21.0°C	11.2°C	16.1°C	85 mm	0 cm
October	14.3°C	6.0°C	10.2°C	81 mm	2 cm
November	7.3°C	0.8°C	4.1°C	92 mm	13 cm
December	1.7°C	−3.9°C	−1.1°C	90 mm	37 cm
Year	12.1°C	3.7°C	7.9°C	1,035 mm	152 cm

Year to year

February varies most from one year to the next (3.0°C), August least

Over 1991–2020, March saw both −25.5°C (2003) and 25.1°C (2012), the widest span of any month.

−40°

−30°

−20°

−10°

0°

10°

20°

30°

40°

JanFebMarAprMayJunJulAugSepOctNovDec

Record low to record high, 1991–2020Normal

Sources

Where Ashfield-Colborne-Wawanosh’s numbers come from

Averages over 30 years, not a forecast.

Normals: 1991–2020 normals for Goderich from ECCC’s climate data site, the nearest location with every month of temperature.
Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
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: 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 Ashfield-Colborne-Wawanosh’s climate

How warm does Ashfield-Colborne-Wawanosh get in summer?

A normal July afternoon tops out at about 24.4°C, the year’s high point.

How cold does Ashfield-Colborne-Wawanosh get in winter?

Of all twelve months, February has the coldest nights, about −8.0°C.

How much rain and snow does Ashfield-Colborne-Wawanosh get?

Over twelve months, rain and melted snow come to 1,035 mm; the range runs from 68 mm in March to 100 mm in June.

Are these figures for Ashfield-Colborne-Wawanosh itself?

Yes: ECCC’s 1991–2020 normals for Goderich, which is in Ashfield-Colborne-Wawanosh.

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

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).