Summer afternoons in Vanier South are warmer than in 78% of Canadian towns
Midwinter brings lows of about −14.0°C. It is a wet place: more rain and snow fall here than on 60% of Canadian towns. A year here swings 41°C from midwinter lows to midsummer highs. Heating does most of its work from October to April, in months below 10°C on average.
Figures: ECCC’s 1991–2020 normals for Ottawa (City) (7.7 km south-west).
A year in Vanier South at a glance
Each month’s typical high and low, in °C.
What stands out about Vanier South’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Vanier South feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
147 frost days and 121 days above 20°C a year
Frost comes from October to April; in January almost every night freezes. Some 15 nights a year drop under −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 938 mm of rain and snow a year
June is the wettest month and February the driest. About 120 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 185 cm of snow a year
Expect snow from October to April, with about 45 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 Vanier South
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year.
Living with Vanier South’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 30 April, has passed; autumn’s first, near 6 October, ends a season of about 158 days.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark May, Jun, Jul, Aug and Sep.
Parks & trails →About 39 days a year bring a wind chill under −20, when bare skin chills fast.
Count on some 50 humid days a year with the humidex past 30.
Bad-weather days, from blizzards to floods, get their own page for Vanier South: the hazards page.
Flood & hazards →ECCC’s normals location: Ottawa (City)
Behind the 1991–2020 normals for Ottawa (City) are 2 stations, which ECCC combines into one record.
| Distance from the town | 7.7 km south-west |
| Station altitude | 79 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | Yes |
| Coldest reading, 1991–2020 | −32.2°C |
| Hottest reading, 1991–2020 | 37.3°C |
| Average wind | 11.5 km/h on average, most often from the west |
| Next-nearest location | Ottawa (Airport), 13 km |
How Vanier South 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 Vanier South whose figures come from another normals location. The nearest places to Vanier South with figures are 16–29 km away.
Vanier South 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 | −5.2°C | −14.0°C | −9.6°C | 65 mm | 45 cm |
| February | −3.3°C | −12.9°C | −8.1°C | 52 mm | 41 cm |
| March | 2.5°C | −6.9°C | −2.2°C | 62 mm | 31 cm |
| April | 11.2°C | 1.1°C | 6.2°C | 81 mm | 8 cm |
| May | 19.4°C | 8.0°C | 13.8°C | 80 mm | 0 cm |
| June | 24.2°C | 13.3°C | 18.8°C | 95 mm | 0 cm |
| July | 26.7°C | 15.8°C | 21.3°C | 92 mm | 0 cm |
| August | 25.6°C | 14.6°C | 20.1°C | 87 mm | 0 cm |
| September | 21.1°C | 10.1°C | 15.6°C | 87 mm | 0 cm |
| October | 13.3°C | 4.1°C | 8.8°C | 90 mm | 2 cm |
| November | 5.8°C | −1.8°C | 2.0°C | 72 mm | 16 cm |
| December | −1.5°C | −8.7°C | −5.1°C | 74 mm | 43 cm |
| Year | 11.7°C | 1.9°C | 6.8°C | 938 mm | 185 cm |
March: −28.5°C at its coldest, 26.5°C at its warmest
The month to count on least is January: one year in three its average strays more than 3.1°C from −9.6°C. June moves least, typically by 1.1°C.
Where Vanier South’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Ottawa (City), the nearest location with a full year of temperatures.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Vanier South’s climate
How warm does Vanier South get in summer?
Highs reach 26.7°C on an average July day; no month is warmer.
How cold does Vanier South get in winter?
Winter bottoms out in January, with lows near −14.0°C.
How much rain and snow does Vanier South get?
The yearly total is about 938 mm. June gets 95 mm, the most of any month; February gets 52 mm, the least.
How long does snow stay on the ground?
A layer of at least 1 cm stays down on about 115 days a year.
Are these figures for Vanier South itself?
They are the normals for Ottawa (City), measured just outside Vanier South itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Vanier South →
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).