Photo: Onasill ~ Bill - Onasill ~ 109 Millions Views · CC BY-SA 2.0Summer afternoons in Aurora are warmer than in 91% of Canadian towns
January nights here settle around −10.1°C. June is the wettest month, February the driest. Frost is rarer than in 70% of Canadian towns: about 145 nights a year drop below freezing. The outdoor season, with highs of 22–26°C, runs through June, August and September.
Aurora has no ECCC normals station of its own: every figure here comes from Toronto Buttonville (Airport), 18 km south-east.
A year in Aurora at a glance
Each month’s typical high and low, in °C.
What stands out about Aurora’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Aurora feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 145 frosts and 126 warm days a year
Frost comes from October to May; in January almost every night freezes. 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
862 mm of precipitation in a typical year
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
146 cm of snow in a typical 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 Aurora
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Heating degree days total each day’s gap between its mean temperature and 18°C. Homes here need less heating than 74% of Canadian towns.
Living with Aurora’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Between the last frost, near 3 May, and the first, near 13 October, lie about 161 frost-free days.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Aug and Sep.
Parks & trails →Plan for about 22 days a year with a wind chill below −20.
The air feels heavier than 30 on the humidex for about 55 days a year.
Ice storms, floods and heat waves are risks, not averages: they are on Aurora’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 | 18 km south-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 | Egbert, 36 km |
How Aurora 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
The nearest places on a normals location of their own: those that share Aurora’s would only repeat its figures. No closer places have figures: these lie 12–28 km from Aurora.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Aurora Toronto Buttonville (Airport) | 27.3°C | −10.1°C | 862 mm |
| East Gwillimbury 12 km · Udora | 26.3°C 1.0°C cooler | −11.7°C 1.6°C colder | 883 mm |
| Bradford 15 km · Egbert | 26.0°C 1.3°C cooler | −11.3°C 1.2°C colder | 793 mm |
Aurora 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
Over 1991–2020, March saw both −25.6°C (2003) and 26.3°C (2012), the widest span of any month.
Where Aurora’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Toronto Buttonville (Airport) from ECCC’s climate data site, the nearest location with every month of temperature.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- 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 Aurora’s climate
How warm does Aurora get in summer?
Afternoons average 27.3°C in July, the warmest time of year.
How cold does Aurora get in winter?
In January, the coldest month, the typical low is −10.1°C.
How much rain and snow does Aurora get?
About 862 mm a year, rain and melted snow together. June is the wettest month (87 mm) and February the driest (51 mm).
How long does snow stay on the ground?
On about 76 days a year the ground keeps at least 1 cm of snow.
Are these figures for Aurora itself?
No. ECCC measures normals at Toronto Buttonville (Airport), not in Aurora; the page uses the nearest it has.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Aurora →
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).