Summer arrives in force in Countryside, hotter than in 95% of Canadian towns
Deep winter brings January lows near −8.9°C. A year here swings 36°C from midwinter lows to midsummer highs. Frost is rarer than in 82% of Canadian towns: about 131 nights a year drop below freezing. The heating season runs November to April: each of those months averages under 10°C.
No ECCC station in Countryside has 1991–2020 normals; the page reads Toronto Pearson (Airport), 15 km south-east, instead.
A year in Countryside at a glance
Each month’s typical high and low, in °C.
What stands out about Countryside’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Countryside feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
131 frost days and 125 days above 20°C a year
The frost season runs October to April, and January freezes nearly every night. Heat of 30°C or more comes on about 17 days a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 807 mm a year
June brings the most rain and snow; February, the least. About 106 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
115 cm of snow in a typical year
From November to April snow is likely; January is the peak, at about 32 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Countryside
93% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Measured against 18°C: each day’s shortfall in mean temperature, added over twelve months. A house here needs less heating than 83% of Canadian towns.
Living with Countryside’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The growing season between frosts lasts about 174 days, roughly 27 April to 20 October.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark May, Jun, Aug and Sep.
Parks & trails →Wind chill falls below −20 on about 21 days a year: cover skin and dress in layers.
Summer brings about 56 days when the humidex passes 30.
Severe weather is a separate story from the averages: see Countryside’s hazards page.
Flood & hazards →ECCC’s normals location: Toronto Pearson (Airport)
ECCC builds the Toronto Pearson (Airport) normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 15 km south-east |
| Station altitude | 173 m |
| Completeness | at least 25 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −31.0°C |
| Hottest reading, 1991–2020 | 37.9°C |
| Average wind | 15.7 km/h on average, most often from the west |
| Next-nearest location | Toronto (City), 33 km |
How Countryside 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.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Countryside’s own would show the same figures). Distances here run 22–29 km: that is how far the nearest places with figures are from Countryside.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Countryside Toronto Pearson (Airport) | 27.4°C | −8.9°C | 807 mm |
| Vaughan 22 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 1.2°C colder | 862 mm |
| Erin 24 km · Elora | 25.4°C 2.0°C cooler | −10.7°C 1.8°C colder | 807 mm |
| Milton 29 km · Burlington Piers | 25.5°C 1.9°C cooler | −6.3°C 2.6°C milder | 807 mm |
Countryside weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −1.2°C | −8.9°C | −5.0°C | 62 mm | 32 cm |
| February | −0.3°C | −8.5°C | −4.4°C | 50 mm | 28 cm |
| March | 5.0°C | −3.8°C | 0.6°C | 51 mm | 17 cm |
| April | 12.0°C | 1.9°C | 7.0°C | 77 mm | 5 cm |
| May | 19.2°C | 8.2°C | 13.7°C | 78 mm | under 1 cm |
| June | 24.5°C | 13.9°C | 19.2°C | 81 mm | 0 cm |
| July | 27.4°C | 16.6°C | 22.1°C | 74 mm | 0 cm |
| August | 26.3°C | 15.8°C | 21.1°C | 69 mm | 0 cm |
| September | 22.3°C | 11.6°C | 16.9°C | 69 mm | 0 cm |
| October | 14.6°C | 5.3°C | 10.0°C | 67 mm | under 1 cm |
| November | 7.9°C | 0.2°C | 4.1°C | 72 mm | 9 cm |
| December | 1.9°C | −5.0°C | −1.6°C | 59 mm | 24 cm |
| Year | 13.3°C | 3.9°C | 8.6°C | 807 mm | 115 cm |
From −24.7°C to 26.0°C: March’s coldest and warmest days since 1991
Year to year, January varies most (a standard deviation of 3.0°C around −5.0°C) and June least (1.3°C).
Where Countryside’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Toronto Pearson (Airport), the nearest location with a full year of temperatures.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Countryside’s climate
How warm does Countryside get in summer?
Peak warmth comes in July, at about 27.4°C by mid-afternoon.
How cold does Countryside get in winter?
Overnight lows average −8.9°C in January, the coldest month.
How much rain and snow does Countryside get?
Rain and snow add up to about 807 mm of water a year; June brings the most (81 mm), February the least (50 mm).
How long does snow stay on the ground?
Roughly 69 days a year start with snow cover of 1 cm or more.
Are these figures for Countryside itself?
Not quite: they come from Toronto Pearson (Airport), the closest ECCC normals location to Countryside.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Countryside →
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).