Summer afternoons in Roseborough are warmer than in 95% of Canadian towns
January nights here settle around −8.9°C. Frosty nights are scarcer than in 82% of Canadian towns. Temperatures cover 36°C across the year, low to high. The outdoor season, with highs of 19–26°C, runs through May, June, August and September.
Roseborough has no ECCC normals station of its own: every figure here comes from Toronto Pearson (Airport), 11 km north-east.
A year in Roseborough at a glance
Each month’s typical high and low, in °C.
What stands out about Roseborough’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Roseborough 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
The frost season runs October to April, and January freezes nearly 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
807 mm of precipitation in a typical year
June brings the most rain and snow; February, the least. On about 106 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
115 cm of snow in a typical 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 Roseborough
93% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year. A house here needs less heating than 83% of Canadian towns.
Living with Roseborough’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The frost-free stretch runs from about 27 April to about 20 October, some 174 days in a normal year.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: May, Jun, Aug and Sep.
Parks & trails →On some 21 days a year the wind chill drops past −20; mitts and a scarf earn their place.
The air feels heavier than 30 on the humidex for about 56 days a year.
Averages smooth over blizzards, ice storms, floods and heat waves; Roseborough’s hazards page covers the risks.
Flood & hazards →ECCC’s normals location: Toronto Pearson (Airport)
Toronto Pearson (Airport) is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 11 km north-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 (Island), 24 km |
How Roseborough 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
Places around Roseborough whose figures come from another normals location. The nearest places to Roseborough with figures are 15–28 km away.
Roseborough weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| 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
Two years in three, January’s average falls within 3.0°C of its normal of −5.0°C; June keeps to within 1.3°C.
Where Roseborough’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Toronto Pearson (Airport), the closest ECCC location with twelve months of temperature normals.
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Roseborough’s climate
How warm does Roseborough get in summer?
Midsummer means July, with afternoons near 27.4°C on a typical day.
How cold does Roseborough get in winter?
A typical January night falls to −8.9°C, the year’s low point.
How much rain and snow does Roseborough get?
Over twelve months, rain and melted snow come to 807 mm; the range runs from 50 mm in February to 81 mm in June.
How long does snow stay on the ground?
Roughly 69 days a year start with snow cover of 1 cm or more.
Are these figures for Roseborough itself?
Not directly: Roseborough has no ECCC normals of its own, and Toronto Pearson (Airport) stands in for it.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Roseborough →
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).