North Riverdale gets fewer frosts than 89% of Canadian towns
Peak summer warmth arrives in July, with afternoons near 27.0°C. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 34°C apart. Its July heat outdoes that of 86% of Canadian towns. The heating season runs November to April: each of those months averages under 10°C.
Environment and Climate Change Canada’s 1991–2020 normals at its Toronto (City) station, 4.1 km west.
A year in North Riverdale at a glance
Each month’s typical high and low, in °C.
What stands out about North Riverdale’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in North Riverdale feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
About 101 frosts and 124 warm days a year
The frost season runs November to April, peaking in January at about 26 nights. About 14 days a year top 30°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 823 mm a year
The most falls in June, the least in March. On about 104 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
146 cm of snow in a typical year
Expect snow from November to April, with about 40 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snowfall: Toronto Buttonville (Airport), 21 km away (Toronto (City) records no complete year of it).
Heating a home in North Riverdale
94% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
The total grows by a degree for every degree a day’s mean sits under 18°C. By this count, homes here need less heating than 90% of Canadian towns.
Living with North Riverdale’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
From about 11 April to 6 November the garden is usually clear of frost, some 208 days.
The outdoor season by the averages is May, Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Humid heat, a humidex over 30, comes on about 59 days a year.
Bad-weather days, from blizzards to floods, get their own page for North Riverdale: the hazards page.
Flood & hazards →ECCC’s normals location: Toronto (City)
Behind the 1991–2020 normals for Toronto (City) are 2 stations, which ECCC combines into one record.
| Distance from the town | 4.1 km west |
| Station altitude | 113 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Toronto Buttonville (Airport), 21 km |
| Coldest reading, 1991–2020 | −25.9°C |
| Hottest reading, 1991–2020 | 38.2°C |
| Next-nearest location | Toronto (Island), 6.2 km |
How North Riverdale 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
The nearest places on a normals location of their own: those that share North Riverdale’s would only repeat its figures. Distances here run 21–27 km: that is how far the nearest places with figures are from North Riverdale.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| North Riverdale Toronto (City) | 27.0°C | −6.7°C | 823 mm |
| Markham 21 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 3.4°C colder | 862 mm |
| Pickering 27 km · Oshawa | 25.7°C 1.3°C cooler | −8.9°C 2.2°C colder | 906 mm |
| Mississauga 27 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C 2.2°C colder | 807 mm |
North Riverdale 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 | −0.3°C | −6.7°C | −3.5°C | 65 mm | 40 cm |
| February | 0.6°C | −6.0°C | −2.7°C | 54 mm | 34 cm |
| March | 5.1°C | −1.8°C | 1.7°C | 53 mm | 20 cm |
| April | 11.7°C | 3.9°C | 7.8°C | 78 mm | 7 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 | 1 cm |
| November | 8.1°C | 2.3°C | 5.2°C | 71 mm | 12 cm |
| December | 2.6°C | −2.7°C | −0.1°C | 58 mm | 33 cm |
| Year | 13.4°C | 6.0°C | 9.7°C | 823 mm | 146 cm |
In March, anything from −23.1°C to 25.7°C
Bars run from each month’s record low to its record high over 1991–2020; January is the month whose average wanders most from year to year (±2.7°C around −3.5°C), June the one that wanders least (±1.2°C).
Where North Riverdale’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Toronto (City), 1991–2020.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about North Riverdale’s climate
How warm does North Riverdale get in summer?
The warmest month is July, when afternoons average 27.0°C.
How cold does North Riverdale get in winter?
Of all twelve months, January has the coldest nights, about −6.7°C.
How much rain and snow does North Riverdale get?
Precipitation totals 823 mm a year, with June the wettest month (82 mm) and March the driest (53 mm).
Are these figures for North Riverdale itself?
Nearly: Toronto (City), the location behind them, sits just beyond North Riverdale’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for North Riverdale →
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).