Ice rarely forms: Casa Loma sees fewer frosts than 89% of Canadian towns
Expect July afternoons of about 27.0°C. Its July heat outdoes that of 86% of Canadian towns. June is the wettest month, March the driest. From May to September, highs of 19–27°C make it easy to spend the day outdoors.
Environment and Climate Change Canada’s 1991–2020 normals at its Toronto (City) station, 1.6 km south.
A year in Casa Loma at a glance
Each month’s typical high and low, in °C.
What stands out about Casa Loma’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Casa Loma 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
Frosts fall from November to April; January has the most, about 26. Some 14 days a year climb past 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
On about 104 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
115 cm of snow in a typical year
Expect snow from November to April, with about 32 cm in January, the snowiest month.
Snowfall by month
Centimetres
Toronto (City) publishes no full year of snowfall, so these figures come from Toronto Pearson (Airport), 18 km away.
Heating a home in Casa Loma
94% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Measured against 18°C: each day’s shortfall in mean temperature, added over twelve months. By this count, homes here need less heating than 90% of Canadian towns.
Living with Casa Loma’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Tender plants are usually safe from around 11 April until frost returns near 6 November: about 208 days.
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 →Humid summer days, the humidex above 30, number about 59 a year.
Severe weather is a separate story from the averages: see Casa Loma’s hazards page.
Flood & hazards →ECCC’s normals location: Toronto (City)
ECCC builds the Toronto (City) normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 1.6 km south |
| Station altitude | 113 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 18 km |
| Coldest reading, 1991–2020 | −25.9°C |
| Hottest reading, 1991–2020 | 38.2°C |
| Next-nearest location | Toronto (Island), 5.9 km |
How Casa Loma 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
The nearest places on a normals location of their own: those that share Casa Loma’s would only repeat its figures. Distances here run 20–29 km: that is how far the nearest places with figures are from Casa Loma.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Casa Loma Toronto (City) | 27.0°C | −6.7°C | 823 mm |
| Vaughan 20 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 3.4°C colder | 862 mm |
| Mississauga 23 km · Toronto Pearson (Airport) | 27.4°C about the same | −8.9°C 2.2°C colder | 807 mm |
Casa Loma 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 | 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 |
January varies most from one year to the next (2.7°C), June least
Records from 1991 to 2020: no month spans more than March, between −23.1°C (2003) and 25.7°C (1998).
Where Casa Loma’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Toronto (City) from ECCC’s climate data site, the nearest location with every month of temperature.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- 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 Casa Loma’s climate
How warm does Casa Loma get in summer?
At its warmest, in July, the normal high is 27.0°C.
How cold does Casa Loma get in winter?
The coldest nights come in January, averaging −6.7°C.
How much rain and snow does Casa Loma get?
Precipitation totals 823 mm a year, with June the wettest month (82 mm) and March the driest (53 mm).
Are these figures for Casa Loma itself?
Nearly: Toronto (City), the location behind them, sits just beyond Casa Loma’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Casa Loma →
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).