July in Weston runs hotter than in 95% of Canadian towns
January mornings start at about −8.9°C. Frost is rarer than in 82% of Canadian towns: about 131 nights a year drop below freezing. Seasons differ by 36°C, from the coldest nights to the warmest afternoons. About 106 days a year bring 1 mm of precipitation or more.
Read at Toronto Pearson (Airport), 9.3 km west: ECCC’s normals for 1991–2020.
A year in Weston at a glance
Each month’s typical high and low, in °C.
What stands out about Weston’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Weston feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 131 frosts and 125 warm days a year
From October to April frost is routine, and in January it comes on almost 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
807 mm of precipitation in a typical year
June brings the most rain and snow; February, the least.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 115 cm in a normal 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 Weston
93% 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. In heating terms, homes need less heating than 83% of Canadian towns.
Living with Weston’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
On average the last spring frost comes around 27 April and the first autumn frost around 20 October: about 174 frost-free days between.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: May, Jun, Aug and Sep.
Parks & trails →Count on some 21 days a year when the wind makes it feel below −20.
Muggy heat with a humidex over 30 arrives on about 56 days a year.
Ice storms, floods and heat waves are risks, not averages: they are on Weston’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 | 9.3 km west |
| 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), 10 km |
How Weston 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
Places around Weston whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Weston Toronto Pearson (Airport) | 27.4°C | −8.9°C | 807 mm |
| Humber Heights-Westmount 1.1 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C about the same | 807 mm |
| Rustic 1.9 km · Toronto (City) | 27.0°C about the same | −6.7°C 2.2°C milder | 823 mm |
Weston 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 |
The month with the widest range: March, −24.7°C to 26.0°C
Two years in three, January’s average falls within 3.0°C of its normal of −5.0°C; June keeps to within 1.3°C.
Where Weston’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Toronto Pearson (Airport), 1991–2020, chosen as the nearest location with a full temperature record.
- 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 Weston’s climate
How warm does Weston get in summer?
Afternoons average 27.4°C in July, the warmest time of year.
How cold does Weston get in winter?
Of all twelve months, January has the coldest nights, about −8.9°C.
How much rain and snow does Weston get?
807 mm a year counting snow as water. The wettest month is June (81 mm); the driest, February (50 mm).
How long does snow stay on the ground?
Snow covers the ground, 1 cm or more, on about 69 days a year.
Are these figures for Weston itself?
Almost: ECCC’s Toronto Pearson (Airport) location, which gives these figures, lies a short way outside Weston.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Weston →
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).