Castlemore Estates has warmer summer afternoons than 95% of Canadian towns
Midwinter brings lows of about −8.9°C. Seasons differ by 36°C, from the coldest nights to the warmest afternoons. Frosty nights are scarcer than in 82% of Canadian towns. Plan time outside for May, June, August and September, when highs sit at 19–26°C.
ECCC publishes no normals for Castlemore Estates itself; the figures are those of Toronto Pearson (Airport), 15 km south-east.
A year in Castlemore Estates at a glance
Each month’s typical high and low, in °C.
What stands out about Castlemore Estates’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Castlemore Estates feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
131 frost days and 125 days above 20°C a year
Frost comes from October to April; in January almost every night freezes. Some 17 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
Rain and melted snow: about 807 mm a year
The most falls in June, the least in February. Some 106 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 115 cm in a normal year
The snow season runs November to April; January brings the most, about 32 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Castlemore Estates
93% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
A day averaging 10 degrees under 18°C adds 10 to the total; warm days add nothing. In heating terms, homes need less heating than 83% of Canadian towns.
Living with Castlemore Estates’s climate
What the normals mean for a garden, a day outside and the depth of winter.
A normal year gives the garden about 174 frost-free days, roughly 27 April to 20 October.
For long days outdoors, May, Jun, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →Roughly 21 days a year feel colder than −20 in the wind.
Roughly 56 days a year feel hotter than 30 once humidity is counted.
Storms, floods and heat waves sit outside these normals; Castlemore Estates’s hazards page covers them.
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 | 15 km south-east |
| 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 Buttonville (Airport), 29 km |
How Castlemore Estates 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 Castlemore Estates whose figures come from another normals location. No closer places have figures: these lie 16–30 km from Castlemore Estates.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Castlemore Estates Toronto Pearson (Airport) | 27.4°C | −8.9°C | 807 mm |
| Vaughan 16 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 1.2°C colder | 862 mm |
| Toronto 28 km · Toronto (City) | 27.0°C about the same | −6.7°C 2.2°C milder | 823 mm |
| Erin 30 km · Elora | 25.4°C 2.0°C cooler | −10.7°C 1.8°C colder | 807 mm |
Castlemore Estates 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 | −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 |
A March here can run from −24.7°C to 26.0°C
January is the least predictable month: about two years in three its average lands within 3.0°C of the normal, −5.0°C. June is the steadiest, within 1.3°C.
Where Castlemore Estates’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Toronto Pearson (Airport), 1991–2020.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- 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 Castlemore Estates’s climate
How warm does Castlemore Estates get in summer?
Afternoons average 27.4°C in July, the warmest time of year.
How cold does Castlemore Estates get in winter?
Of all twelve months, January has the coldest nights, about −8.9°C.
How much rain and snow does Castlemore Estates get?
A normal year brings 807 mm, snow included as water: June is wettest at 81 mm, February driest at 50 mm.
How long does snow stay on the ground?
Snow lies on the ground for about 69 days in a normal year.
Are these figures for Castlemore Estates itself?
No, the station behind them is Toronto Pearson (Airport), beyond Castlemore Estates’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Castlemore Estates →
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).