Frost comes to Roncesvalles less often than to 87% of Canadian towns
Midsummer highs settle at about 25.3°C. Winter and summer sit 32°C apart. Plan for rain or snow on about 104 days a year, the days with 1 mm or more.
Environment and Climate Change Canada’s 1991–2020 normals at its Toronto (Island) station, 3.8 km south-east.
A year in Roncesvalles at a glance
Each month’s typical high and low, in °C.
What stands out about Roncesvalles’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Roncesvalles feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 110 frosts and 107 warm days a year
The frost season runs November to April, peaking in January at about 26 nights. Some 5 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 823 mm of rain and snow a year
June brings the most rain and snow; March, the least.
Rain and snow by month
Millimetres
ECCC’s Toronto (Island) normals leave precipitation out; the figures here come from Toronto (City), 4.3 km away.
Snowfall: about 115 cm in a normal year
From November to April snow is likely; January is the peak, at about 32 cm.
Snowfall by month
Centimetres
Snowfall: Toronto Pearson (Airport), 16 km away (Toronto (Island) records no complete year of it).
Heating a home in Roncesvalles
92% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Measured against 18°C: each day’s shortfall in mean temperature, added over twelve months. Over a year, a home here needs less heating than 87% of Canadian towns.
Living with Roncesvalles’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul, Aug and Sep.
Parks & trails →On some 14 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 45 days a year.
Severe weather is a separate story from the averages: see Roncesvalles’s hazards page.
Flood & hazards →ECCC’s normals location: Toronto (Island)
Toronto (Island) is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 3.8 km south-east |
| Station altitude | 77 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Precipitation from | Toronto (City), 4.3 km |
| Snowfall from | Toronto Pearson (Airport), 16 km |
| Coldest reading, 1991–2020 | −26.9°C |
| Hottest reading, 1991–2020 | 36.5°C |
| Average wind | 16.9 km/h on average, most often from the west |
| Next-nearest location | Toronto (City), 4.3 km |
How Roncesvalles 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 Roncesvalles whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Roncesvalles Toronto (Island) | 25.3°C | −7.1°C | 823 mm |
| Little Portugal 1.2 km · Toronto (Island) | 25.3°C about the same | −7.1°C about the same | 823 mm |
| Dufferin Grove 1.2 km · Toronto (City) | 27.0°C 1.7°C warmer | −6.7°C about the same | 823 mm |
Roncesvalles weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −0.5°C | −7.1°C | −3.8°C | 65 mm | 32 cm |
| February | 0.3°C | −6.4°C | −3.1°C | 54 mm | 28 cm |
| March | 4.2°C | −2.5°C | 0.8°C | 53 mm | 17 cm |
| April | 10.2°C | 2.7°C | 6.5°C | 78 mm | 5 cm |
| May | 16.8°C | 8.3°C | 12.6°C | 76 mm | under 1 cm |
| June | 22.3°C | 13.9°C | 18.1°C | 82 mm | 0 cm |
| July | 25.3°C | 16.7°C | 21.0°C | 77 mm | 0 cm |
| August | 24.8°C | 17.2°C | 21.0°C | 72 mm | 0 cm |
| September | 20.9°C | 13.4°C | 17.2°C | 69 mm | 0 cm |
| October | 13.8°C | 7.0°C | 10.5°C | 69 mm | under 1 cm |
| November | 7.5°C | 1.7°C | 4.6°C | 71 mm | 9 cm |
| December | 2.5°C | −3.1°C | −0.3°C | 58 mm | 24 cm |
| Year | 12.4°C | 5.1°C | 8.8°C | 823 mm | 115 cm |
A March here can run from −23.1°C to 21.8°C
Two years in three, January’s average falls within 2.7°C of its normal of −3.8°C; June keeps to within 1.2°C.
Where Roncesvalles’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Toronto (Island), the nearest location with a full year of temperatures.
- Other locations: where a location publishes no full year of precipitation or snowfall, the nearest one that does supplies it, named beside those figures.
- Comparisons: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
- 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 Roncesvalles’s climate
How warm does Roncesvalles get in summer?
Midsummer means July, with afternoons near 25.3°C on a typical day.
How cold does Roncesvalles get in winter?
On a normal January night the air drops to −7.1°C, the coldest of the year.
How much rain and snow does Roncesvalles get?
About 823 mm a year, rain and melted snow together. June is the wettest month (82 mm) and March the driest (53 mm).
Are these figures for Roncesvalles itself?
Close to it: they are ECCC’s 1991–2020 normals for Toronto (Island), just outside Roncesvalles’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Roncesvalles →
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).