Trinity Commons has warmer summer afternoons than 95% of Canadian towns
Nights in January average −8.9°C. Frost is rarer than in 82% of Canadian towns: about 131 nights a year drop below freezing. Expect the most rain and snow in June and the least in February. Comfortable outdoor weather, highs of 19–26°C, belongs to May, June, August and September.
Trinity Commons has no ECCC normals station of its own: every figure here comes from Toronto Pearson (Airport), 13 km south-east.
A year in Trinity Commons at a glance
Each month’s typical high and low, in °C.
What stands out about Trinity Commons’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Trinity Commons feels like
Each season’s and each month’s usual high and low, 1991–2020.
131 frost days and 125 days above 20°C a year
From October to April frost is routine, and in January it comes on almost every night. 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
About 807 mm of rain and snow a year
On about 106 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 115 cm of snow a year
Snow falls from November to April, most of all in January (about 32 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Trinity Commons
93% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
One degree below 18°C for one day makes one heating degree day; the year’s days are added together. Homes here need less heating than 83% of Canadian towns.
Living with Trinity Commons’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Between the last frost, near 27 April, and the first, near 20 October, lie about 174 frost-free days.
Highs of 17–27°C with nights of 8°C or more come in May, Jun, Aug and Sep.
Parks & trails →The wind chill passes −20 on about 21 days in a normal year.
Muggy heat with a humidex over 30 arrives on about 56 days a year.
Ice storms, floods and heat waves are risks, not averages: they are on Trinity Commons’s hazards page.
Flood & hazards →ECCC’s normals location: Toronto Pearson (Airport)
Behind the 1991–2020 normals for Toronto Pearson (Airport) are 2 stations, which ECCC combines into one record.
| Distance from the town | 13 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 (City), 30 km |
How Trinity Commons 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
Nearby places read from a different ECCC location (places on Trinity Commons’s own would show the same figures). Trinity Commons has few close neighbours with figures, so the list reaches 22–28 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Trinity Commons Toronto Pearson (Airport) | 27.4°C | −8.9°C | 807 mm |
| Vaughan 22 km · Toronto Buttonville (Airport) | 27.3°C about the same | −10.1°C 1.2°C colder | 862 mm |
| Erin 26 km · Elora | 25.4°C 2.0°C cooler | −10.7°C 1.8°C colder | 807 mm |
| Milton 27 km · Burlington Piers | 25.5°C 1.9°C cooler | −6.3°C 2.6°C milder | 807 mm |
Trinity Commons 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 |
January varies most from one year to the next (3.0°C), June least
March has the widest record range, −24.7°C in 2003 to 26.0°C in 2012; the tick on each bar is the month’s normal.
Where Trinity Commons’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Toronto Pearson (Airport) from ECCC’s climate data site, the nearest location with every month of temperature.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- 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 Trinity Commons’s climate
How warm does Trinity Commons get in summer?
Highs reach 27.4°C on an average July day; no month is warmer.
How cold does Trinity Commons get in winter?
At its coldest, in January, the normal low is −8.9°C.
How much rain and snow does Trinity Commons get?
807 mm a year counting snow as water. The wettest month is June (81 mm); the driest, February (50 mm).
How long does snow stay on the ground?
Snow covers the ground, 1 cm or more, on about 69 days a year.
Are these figures for Trinity Commons itself?
No, they come from Toronto Pearson (Airport); ECCC keeps no 1991–2020 normals in Trinity Commons itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Trinity Commons →
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).