July in Langstaff runs hotter than in 91% of Canadian towns
The coldest hours of a January night bottom out at −10.1°C on average. The seasons are far apart: from a winter night to a summer afternoon the average spans 37°C. Only about 145 nights a year bring a frost, fewer than in 70% of Canadian towns. Expect about 145 frosty starts a year, days when the air falls to freezing.
These are not Langstaff’s own readings: ECCC keeps no normals there, so the page uses Toronto Buttonville (Airport), 5.6 km north-east.
A year in Langstaff at a glance
Each month’s typical high and low, in °C.
What stands out about Langstaff’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Langstaff feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 145 days, 20°C on 126
Frost comes from October to May; in January almost every night freezes. On about 6 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
862 mm of precipitation in a typical year
June brings the most rain and snow; February, the least. On about 113 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 146 cm in a normal year
Expect snow from November to April, with about 40 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Langstaff
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October 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 74% of Canadian towns.
Living with Langstaff’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The frost-free stretch runs from about 3 May to about 13 October, some 161 days in a normal year.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Aug and Sep.
Parks & trails →The wind chill passes −20 on about 22 days in a normal year.
Count on some 55 humid days a year with the humidex past 30.
A typical year is calm by definition; Langstaff’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Toronto Buttonville (Airport)
ECCC builds the Toronto Buttonville (Airport) normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 5.6 km north-east |
| Station altitude | 198 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −35.2°C |
| Hottest reading, 1991–2020 | 37.8°C |
| Average wind | 12.2 km/h on average, most often from the north |
| Next-nearest location | Toronto (City), 17 km |
How Langstaff compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Ontario.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Langstaff’s would only repeat its figures. Langstaff has few close neighbours with figures, so the list reaches 12–30 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Langstaff Toronto Buttonville (Airport) | 27.3°C | −10.1°C | 862 mm |
| Toronto 12 km · Toronto (City) | 27.0°C about the same | −6.7°C 3.4°C milder | 823 mm |
| Pickering 25 km · Oshawa | 25.7°C 1.6°C cooler | −8.9°C 1.2°C milder | 906 mm |
| Brampton 30 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C 1.2°C milder | 807 mm |
Langstaff weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −1.7°C | −10.1°C | −6.0°C | 64 mm | 40 cm |
| February | −1.0°C | −10.1°C | −5.6°C | 51 mm | 34 cm |
| March | 4.6°C | −5.0°C | −0.2°C | 52 mm | 20 cm |
| April | 11.8°C | 1.2°C | 6.5°C | 79 mm | 7 cm |
| May | 19.3°C | 7.4°C | 13.4°C | 80 mm | under 1 cm |
| June | 24.6°C | 13.0°C | 18.8°C | 87 mm | 0 cm |
| July | 27.3°C | 15.6°C | 21.5°C | 85 mm | 0 cm |
| August | 26.3°C | 14.8°C | 20.6°C | 72 mm | 0 cm |
| September | 21.9°C | 10.4°C | 16.2°C | 83 mm | 0 cm |
| October | 14.3°C | 4.3°C | 9.4°C | 71 mm | 1 cm |
| November | 7.4°C | −0.8°C | 3.3°C | 77 mm | 12 cm |
| December | 1.5°C | −5.8°C | −2.2°C | 63 mm | 33 cm |
| Year | 13.0°C | 2.9°C | 8.0°C | 862 mm | 146 cm |
March has run from −25.6°C to 26.3°C in thirty years
The month to count on least is January: one year in three its average strays more than 3.1°C from −6.0°C. June moves least, typically by 1.2°C.
Where Langstaff’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Toronto Buttonville (Airport), the closest ECCC location with twelve months of temperature normals.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- 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 Langstaff’s climate
How warm does Langstaff get in summer?
Afternoons average 27.3°C in July, the warmest time of year.
How cold does Langstaff get in winter?
January nights average −10.1°C, the coldest of the year.
How much rain and snow does Langstaff get?
Around 862 mm a year in all, from 87 mm in June down to 51 mm in February.
How long does snow stay on the ground?
There is 1 cm of snow or more on the ground on roughly 76 days a year.
Are these figures for Langstaff itself?
Not exactly. Langstaff lacks a normals station, so Toronto Buttonville (Airport) supplies the figures.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Langstaff →
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).