Frosty mornings in Rockcliffe-Smythe are scarcer than in 89% of Canadian towns
Expect July afternoons of about 27.0°C. Precipitation peaks in June and eases off in March. By July afternoons alone, it runs hotter than 86% of Canadian towns. Plan for rain or snow on about 104 days a year, the days with 1 mm or more.
Figures: ECCC’s 1991–2020 normals for Toronto (City) (7.5 km east).
A year in Rockcliffe-Smythe at a glance
Each month’s typical high and low, in °C.
What stands out about Rockcliffe-Smythe’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Rockcliffe-Smythe feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 101 days, 20°C on 124
Frosts fall from November to April; January has the most, about 26. 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
About 823 mm of rain and snow a year
Rain and snow by month
Millimetres
Snowfall: about 115 cm in a normal year
Expect snow from November to April, with about 32 cm in January, the snowiest month.
Snowfall by month
Centimetres
ECCC’s Toronto (City) normals leave snowfall out; the figures here come from Toronto Pearson (Airport), 11 km away.
Heating a home in Rockcliffe-Smythe
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. In heating terms, homes need less heating than 90% of Canadian towns.
Living with Rockcliffe-Smythe’s climate
What the normals mean for a garden, a day outside and the depth of winter.
A normal year gives the garden about 208 frost-free days, roughly 11 April to 6 November.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark May, Jun, Jul, Aug and Sep.
Parks & trails →Roughly 59 days a year feel hotter than 30 once humidity is counted.
For blizzards, floods and wildfire, turn to Rockcliffe-Smythe’s 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 | 7.5 km east |
| Station altitude | 113 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 11 km |
| Coldest reading, 1991–2020 | −25.9°C |
| Hottest reading, 1991–2020 | 38.2°C |
| Next-nearest location | Toronto (Island), 9.1 km |
How Rockcliffe-Smythe 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
Nearby places read from a different ECCC location (places on Rockcliffe-Smythe’s own would show the same figures). The nearest places to Rockcliffe-Smythe with figures are 17–26 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Rockcliffe-Smythe Toronto (City) | 27.0°C | −6.7°C | 823 mm |
| Mississauga 17 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C 2.2°C colder | 807 mm |
| Vaughan 18 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 3.4°C colder | 862 mm |
Rockcliffe-Smythe 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 |
The most changeable month: January, give or take 2.7°C; the steadiest, June
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 Rockcliffe-Smythe’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Toronto (City), the closest ECCC location with twelve months of temperature normals.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
- Not on this page: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Rockcliffe-Smythe’s climate
How warm does Rockcliffe-Smythe get in summer?
Midsummer means July, with afternoons near 27.0°C on a typical day.
How cold does Rockcliffe-Smythe get in winter?
On a normal January night the air drops to −6.7°C, the coldest of the year.
How much rain and snow does Rockcliffe-Smythe get?
A normal year brings 823 mm, snow included as water: June is wettest at 82 mm, March driest at 53 mm.
Are these figures for Rockcliffe-Smythe itself?
Close to it: they are ECCC’s 1991–2020 normals for Toronto (City), just outside Rockcliffe-Smythe’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rockcliffe-Smythe →
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).