Nights turn raw in Portobello South each January, colder than in 78% of Canadian towns
Expect July afternoons of about 26.2°C. Temperatures cover 43°C across the year, low to high. Summer afternoons here are warmer than in 62% of Canadian towns. Ice scrapers and block heaters earn their keep on roughly 179 days a year at 0°C or below.
The nearest ECCC normals location to Portobello South is Angers, 13 km north-west, and every figure on this page is its.
A year in Portobello South at a glance
Each month’s typical high and low, in °C.
What stands out about Portobello South’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Portobello South feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 179 frosts and 112 warm days a year
From September to May frost is routine, and in January it comes on almost every night. Some 29 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
938 mm of precipitation in a typical year
June brings the most rain and snow; February, the least. Some 120 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Precipitation and snowfall: Ottawa (City), 21 km away (Angers records no complete year of either).
About 185 cm of snow a year
The snow season runs October to April; January brings the most, about 45 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Portobello South
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
ECCC sums, over the year, how many degrees each day’s average falls short of 18°C. Homes here need more heating than 60% of Canadian towns.
Living with Portobello South’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Gardens get from about 26 May to 22 September without frost, around 119 days in all.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →Ice storms, floods and heat waves are risks, not averages: they are on Portobello South’s hazards page.
Flood & hazards →ECCC’s normals location: Angers
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Angers.
| Distance from the town | 13 km north-west |
| Station altitude | 91 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Ottawa (City), 21 km |
| Coldest reading, 1991–2020 | −39.0°C |
| Hottest reading, 1991–2020 | 36.0°C |
| Next-nearest location | Ottawa (City), 21 km |
How Portobello South 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 Portobello South’s would only repeat its figures. The nearest places to Portobello South with figures are 18–29 km away.
Portobello 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 | −5.6°C | −16.5°C | −11.2°C | 65 mm | 45 cm |
| February | −3.3°C | −15.5°C | −9.5°C | 52 mm | 41 cm |
| March | 2.3°C | −8.7°C | −3.7°C | 62 mm | 31 cm |
| April | 10.7°C | −1.0°C | 5.0°C | 81 mm | 8 cm |
| May | 19.1°C | 5.6°C | 12.2°C | 80 mm | 0 cm |
| June | 23.8°C | 10.9°C | 17.4°C | 95 mm | 0 cm |
| July | 26.2°C | 13.4°C | 19.6°C | 92 mm | 0 cm |
| August | 25.1°C | 12.5°C | 18.7°C | 87 mm | 0 cm |
| September | 20.4°C | 8.1°C | 14.2°C | 87 mm | 0 cm |
| October | 12.6°C | 2.2°C | 7.4°C | 90 mm | 2 cm |
| November | 5.2°C | −3.5°C | 1.0°C | 72 mm | 16 cm |
| December | −2.1°C | −11.0°C | −7.0°C | 74 mm | 43 cm |
| Year | 11.2°C | −0.3°C | 5.3°C | 938 mm | 185 cm |
March: −33.5°C at its coldest, 27.0°C at its warmest
From one year to the next, January’s average typically shifts by 3.5°C around its normal of −11.2°C, the widest of any month, while August’s shifts by 1.1°C.
Where Portobello South’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Angers, its nearest location with complete temperatures.
- Other locations: ECCC blanks a month that fails its completeness rule, so the precipitation or snowfall here comes from the next location with all twelve months.
- 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: 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 Portobello South’s climate
How warm does Portobello South get in summer?
A normal July afternoon tops out at about 26.2°C, the year’s high point.
How cold does Portobello South get in winter?
In January, the coldest month, the typical low is −16.5°C.
How much rain and snow does Portobello South get?
Rain and snow add up to about 938 mm of water a year; June brings the most (95 mm), February the least (52 mm).
How long does snow stay on the ground?
There is 1 cm of snow or more on the ground on roughly 121 days a year.
Are these figures for Portobello South itself?
No, they come from Angers; ECCC keeps no 1991–2020 normals in Portobello South itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Portobello 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).