Hardly any Canadian towns wake to more frost than Summerside
On a normal July day the thermometer tops out near 23.0°C. The wettest month is July; the driest is February. Summers stay cool: July afternoons here are cooler than in 90% of Canadian towns. About 78 days a year bring 1 mm of precipitation or more.
Figures: ECCC’s 1991–2020 normals for Edmonton (Airport) (13 km south-west).
A year in Summerside at a glance
Each month’s typical high and low, in °C.
What stands out about Summerside’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Summerside feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 211 frosts and 90 warm days a year
Frost comes from September to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 38 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 434 mm a year
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 127 cm in a normal year
From October to May snow is likely; January is the peak, at about 24 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Summerside
87% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The count adds up, day by day, how far the mean temperature falls short of 18°C. That means homes here need more heating than 93% of Canadian towns.
Living with Summerside’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
A normal year gives the garden about 105 frost-free days, roughly 27 May to 10 September.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jul.
Parks & trails →Count on some 67 days a year when the wind makes it feel below −20.
Summer brings about 11 days when the humidex passes 30.
For the weather that does damage, from ice storms to floods, see Summerside’s hazards page.
Flood & hazards →ECCC’s normals location: Edmonton (Airport)
ECCC builds the Edmonton (Airport) normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 13 km south-west |
| Station altitude | 723 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −46.1°C |
| Hottest reading, 1991–2020 | 35.6°C |
| Average wind | 12.5 km/h on average, most often from the south |
| Next-nearest location | Edmonton (City), 18 km |
How Summerside compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Alberta.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Summerside’s would only repeat its figures. Summerside has no close neighbour with figures; the nearest is 12 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Summerside Edmonton (Airport) | 23.0°C | −18.1°C | 434 mm |
| Edmonton 12 km · Edmonton (City) | 23.5°C 0.5°C warmer | −14.7°C 3.4°C milder | 423 mm |
Summerside weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −6.5°C | −18.1°C | −12.3°C | 22 mm | 24 cm |
| February | −4.1°C | −16.6°C | −10.4°C | 12 mm | 14 cm |
| March | 0.5°C | −11.2°C | −5.3°C | 17 mm | 19 cm |
| April | 10.1°C | −3.2°C | 3.5°C | 30 mm | 16 cm |
| May | 17.6°C | 2.7°C | 10.1°C | 47 mm | 6 cm |
| June | 20.7°C | 7.5°C | 14.1°C | 75 mm | under 1 cm |
| July | 23.0°C | 9.4°C | 16.2°C | 87 mm | 0 cm |
| August | 22.4°C | 7.8°C | 15.1°C | 53 mm | under 1 cm |
| September | 17.8°C | 2.8°C | 10.3°C | 35 mm | 1 cm |
| October | 10.0°C | −3.3°C | 3.4°C | 22 mm | 10 cm |
| November | 0.2°C | −10.6°C | −5.2°C | 20 mm | 19 cm |
| December | −5.3°C | −16.7°C | −11.0°C | 15 mm | 16 cm |
| Year | 8.9°C | −4.1°C | 2.4°C | 434 mm | 127 cm |
From year to year, February moves by 4.3°C, more than any month, and June least
Bars run from each month’s record low to its record high since 1991. March spans the most, from −42.7°C (2009) to 24.2°C (2004).
Where Summerside’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Edmonton (Airport): the nearest of its locations with every month’s temperatures.
- Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
- 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 Summerside’s climate
How warm does Summerside get in summer?
Afternoons average 23.0°C in July, the warmest time of year.
How cold does Summerside get in winter?
Deep winter means January, when nights average −18.1°C.
How much rain and snow does Summerside get?
Some 434 mm falls in a year. Most of it comes in July (87 mm), the least in February (12 mm).
How long does snow stay on the ground?
On about 145 days a year the ground keeps at least 1 cm of snow.
Are these figures for Summerside itself?
Nearly: Edmonton (Airport), the location behind them, sits just beyond Summerside’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Summerside →
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).