Yonge-St.Clair gets fewer frosts than 89% of Canadian towns
Midsummer highs settle at about 27.0°C. Summer afternoons here are warmer than in 86% of Canadian towns. The gap between a January night and a July afternoon is 34°C. Heating does most of its work from November to April, in months below 10°C on average.
Environment and Climate Change Canada’s 1991–2020 normals at its Toronto (City) station, 2.2 km south.
A year in Yonge-St.Clair at a glance
Each month’s typical high and low, in °C.
What stands out about Yonge-St.Clair’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Yonge-St.Clair feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 101 frosts and 124 warm days a year
Frost comes from November to April, most of all in January (about 26 nights). Heat of 30°C or more comes on about 14 days a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 823 mm of rain and snow a year
June brings the most rain and snow; March, the least. On about 104 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Snowfall: about 115 cm in a normal year
Snow falls from November to April, most of all in January (about 32 cm).
Snowfall by month
Centimetres
ECCC’s Toronto (City) normals leave snowfall out; the figures here come from Toronto Pearson (Airport), 19 km away.
Heating a home in Yonge-St.Clair
94% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year. Homes here need less heating than 90% of Canadian towns.
Living with Yonge-St.Clair’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The frost-free stretch runs from about 11 April to about 6 November, some 208 days in a normal year.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to May, Jun, Jul, Aug and Sep.
Parks & trails →About 59 days a year turn sultry, with the humidex past 30.
A typical year is calm by definition; Yonge-St.Clair’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Toronto (City)
Toronto (City) is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 2.2 km south |
| Station altitude | 113 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 19 km |
| Coldest reading, 1991–2020 | −25.9°C |
| Hottest reading, 1991–2020 | 38.2°C |
| Next-nearest location | Toronto (Island), 6.7 km |
How Yonge-St.Clair compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Ontario.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Yonge-St.Clair’s own would show the same figures). Yonge-St.Clair has few close neighbours with figures, so the list reaches 19–29 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Yonge-St.Clair Toronto (City) | 27.0°C | −6.7°C | 823 mm |
| Vaughan 19 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 3.4°C colder | 862 mm |
| Mississauga 24 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C 2.2°C colder | 807 mm |
| Pickering 29 km · Oshawa | 25.7°C 1.3°C cooler | −8.9°C 2.2°C colder | 906 mm |
Yonge-St.Clair 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 | −0.3°C | −6.7°C | −3.5°C | 65 mm | 32 cm |
| February | 0.6°C | −6.0°C | −2.7°C | 54 mm | 28 cm |
| March | 5.1°C | −1.8°C | 1.7°C | 53 mm | 17 cm |
| April | 11.7°C | 3.9°C | 7.8°C | 78 mm | 5 cm |
| May | 18.8°C | 10.0°C | 14.5°C | 76 mm | under 1 cm |
| June | 24.2°C | 15.3°C | 19.8°C | 82 mm | 0 cm |
| July | 27.0°C | 18.1°C | 22.5°C | 77 mm | 0 cm |
| August | 26.1°C | 17.7°C | 21.9°C | 72 mm | 0 cm |
| September | 22.0°C | 13.8°C | 17.9°C | 69 mm | 0 cm |
| October | 14.6°C | 7.7°C | 11.2°C | 69 mm | under 1 cm |
| November | 8.1°C | 2.3°C | 5.2°C | 71 mm | 9 cm |
| December | 2.6°C | −2.7°C | −0.1°C | 58 mm | 24 cm |
| Year | 13.4°C | 6.0°C | 9.7°C | 823 mm | 115 cm |
From year to year, January moves by 2.7°C, more than any month, and June least
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −23.1°C in 2003 to 25.7°C in 1998.
Where Yonge-St.Clair’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Toronto (City), 1991–2020, chosen as the nearest location with a full temperature record.
- 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: 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, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Yonge-St.Clair’s climate
How warm does Yonge-St.Clair get in summer?
On a normal day in July the thermometer climbs to 27.0°C, the warmest of the year.
How cold does Yonge-St.Clair get in winter?
Deep winter means January, when nights average −6.7°C.
How much rain and snow does Yonge-St.Clair get?
The yearly total is about 823 mm. June gets 82 mm, the most of any month; March gets 53 mm, the least.
Are these figures for Yonge-St.Clair itself?
Almost: ECCC’s Toronto (City) location, which gives these figures, lies a short way outside Yonge-St.Clair.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Yonge-St.Clair →
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).