Summer arrives in force in Box Grove, hotter than in 91% of Canadian towns
January mornings start at about −10.1°C. The gap between a January night and a July afternoon is 37°C. By frosts alone, it ranks gentler than 70% of Canadian towns. Ice scrapers and block heaters earn their keep on roughly 145 days a year at 0°C or below.
These are not Box Grove’s own readings: ECCC keeps no normals there, so the page uses Toronto Buttonville (Airport), 10 km west.
A year in Box Grove at a glance
Each month’s typical high and low, in °C.
What stands out about Box Grove’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Box Grove feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 145 days, 20°C on 126
From October to May frost is routine, and in January it comes on almost every night. On about 6 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 862 mm of rain and snow a year
June brings the most rain and snow; February, the least. 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
Snowfall: about 146 cm in a normal year
Snow falls from November to April, most of all in January (about 40 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Box Grove
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The total grows by a degree for every degree a day’s mean sits under 18°C. That means homes here need less heating than 74% of Canadian towns.
Living with Box Grove’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Count on about 161 frost-free days: the last frost averages 3 May, the first 13 October.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Aug and Sep.
Parks & trails →About 22 days a year bring a wind chill under −20, when bare skin chills fast.
Summer brings about 55 days when the humidex passes 30.
Bad-weather days, from blizzards to floods, get their own page for Box Grove: the hazards page.
Flood & hazards →ECCC’s normals location: Toronto Buttonville (Airport)
Toronto Buttonville (Airport) is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 10 km west |
| 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), 24 km |
How Box Grove 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
The nearest places on a normals location of their own: those that share Box Grove’s would only repeat its figures. Box Grove has few close neighbours with figures, so the list reaches 11–29 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Box Grove Toronto Buttonville (Airport) | 27.3°C | −10.1°C | 862 mm |
| Pickering 11 km · Oshawa | 25.7°C 1.6°C cooler | −8.9°C 1.2°C milder | 906 mm |
| Toronto 20 km · Toronto (City) | 27.0°C about the same | −6.7°C 3.4°C milder | 823 mm |
| Uxbridge 29 km · Udora | 26.3°C 1.0°C cooler | −11.7°C 1.6°C colder | 883 mm |
Box Grove 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 |
March has run from −25.6°C to 26.3°C in thirty years
Year to year, January varies most (a standard deviation of 3.1°C around −6.0°C) and June least (1.2°C).
Where Box Grove’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Toronto Buttonville (Airport): the nearest of its locations with every month’s temperatures.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- Not on this page: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Box Grove’s climate
How warm does Box Grove get in summer?
On a normal day in July the thermometer climbs to 27.3°C, the warmest of the year.
How cold does Box Grove get in winter?
Expect nights around −10.1°C in January; no month is colder.
How much rain and snow does Box Grove get?
June is the wettest month at 87 mm and February the driest at 51 mm, for 862 mm over the year.
How long does snow stay on the ground?
Snow lies on the ground for about 76 days in a normal year.
Are these figures for Box Grove itself?
The figures are ECCC’s for Toronto Buttonville (Airport); Box Grove has no normals station.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Box Grove →
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).