Summer arrives in force in Concord, hotter than in 91% of Canadian towns
January nights here settle around −10.1°C. Seasons differ by 37°C, from the coldest nights to the warmest afternoons. By frosts alone, it ranks gentler than 70% of Canadian towns. Have the furnace checked before October to April, the months that average under 10°C.
No ECCC station in Concord has 1991–2020 normals; the page reads Toronto Buttonville (Airport), 12 km north-east, instead.
A year in Concord at a glance
Each month’s typical high and low, in °C.
What stands out about Concord’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Concord feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 145 frosts and 126 warm days a year
The frost season runs October to May, and January freezes nearly every night. Deep cold, under −20°C, comes on about 6 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
862 mm of precipitation in a typical year
The most falls in June, the least in February. Some 113 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 146 cm of snow a year
Expect snow from November to April, with about 40 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Concord
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
One degree below 18°C for one day makes one heating degree day; the year’s days are added together. Over a year, a home here needs less heating than 74% of Canadian towns.
Living with Concord’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Seedlings can go out once the average last frost, around 3 May, has passed; autumn’s first, near 13 October, ends a season of about 161 days.
For long days outdoors, Jun, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →Count on some 22 days a year when the wind makes it feel below −20.
About 55 days a year feel above 30 on the humidex.
Ice storms, floods and heat waves are risks, not averages: they are on Concord’s hazards page.
Flood & hazards →ECCC’s normals location: Toronto Buttonville (Airport)
Behind the 1991–2020 normals for Toronto Buttonville (Airport) are 3 stations, which ECCC combines into one record.
| Distance from the town | 12 km north-east |
| Station altitude | 198 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −35.2°C |
| Hottest reading, 1991–2020 | 37.8°C |
| Average wind | 12.2 km/h on average, most often from the north |
| Next-nearest location | Toronto (City), 15 km |
How Concord 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
Places around Concord whose figures come from another normals location. Concord has few close neighbours with figures, so the list reaches 11–27 km out.
Concord 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 | −1.7°C | −10.1°C | −6.0°C | 64 mm | 40 cm |
| February | −1.0°C | −10.1°C | −5.6°C | 51 mm | 34 cm |
| March | 4.6°C | −5.0°C | −0.2°C | 52 mm | 20 cm |
| April | 11.8°C | 1.2°C | 6.5°C | 79 mm | 7 cm |
| May | 19.3°C | 7.4°C | 13.4°C | 80 mm | under 1 cm |
| June | 24.6°C | 13.0°C | 18.8°C | 87 mm | 0 cm |
| July | 27.3°C | 15.6°C | 21.5°C | 85 mm | 0 cm |
| August | 26.3°C | 14.8°C | 20.6°C | 72 mm | 0 cm |
| September | 21.9°C | 10.4°C | 16.2°C | 83 mm | 0 cm |
| October | 14.3°C | 4.3°C | 9.4°C | 71 mm | 1 cm |
| November | 7.4°C | −0.8°C | 3.3°C | 77 mm | 12 cm |
| December | 1.5°C | −5.8°C | −2.2°C | 63 mm | 33 cm |
| Year | 13.0°C | 2.9°C | 8.0°C | 862 mm | 146 cm |
Two years in three, January’s average lands within 3.1°C of normal, against the steadier June
Bars run from each month’s record low to its record high since 1991. March spans the most, from −25.6°C (2003) to 26.3°C (2012).
Where Concord’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Toronto Buttonville (Airport), the nearest location with a full year of temperatures.
- 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: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Concord’s climate
How warm does Concord get in summer?
The warmest month is July, when afternoons average 27.3°C.
How cold does Concord get in winter?
In January, the coldest month, the typical low is −10.1°C.
How much rain and snow does Concord get?
Some 862 mm falls in a year. Most of it comes in June (87 mm), the least in February (51 mm).
How long does snow stay on the ground?
A layer of at least 1 cm stays down on about 76 days a year.
Are these figures for Concord itself?
They are the closest available: the normals for Toronto Buttonville (Airport), since Concord has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Concord →
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).