Photo: WabbitWanderer from London, Canada · CC BY-SA 2.0Souris has cooler summers than 87% of Canadian towns
The coldest hours of a January night bottom out at −9.9°C on average. Its yearly rain and snow top those of 82% of Canadian towns. Some 34°C separates winter nights from summer afternoons. The outdoor season runs from June to September, with highs of 19–23°C.
ECCC publishes no normals for Souris itself; the figures are those of St. Peters/Monticello, 21 km north-west.
A year in Souris at a glance
Each month’s typical high and low, in °C.
What stands out about Souris’s climate
Compared with Canadian towns, with its place among towns of 2,500+ on Prince Edward Island beside it.
What a year in Souris feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
155 frost days and 77 days above 20°C a year
From October to May frost is routine, and in January it comes on almost every night.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,116 mm of rain and snow a year
October brings the most rain and snow; February, the least. 12th wettest of 13 towns of 2,500+ on Prince Edward Island. On about 141 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
248 cm of snow in a typical year
The snow season runs November to April; February brings the most, about 68 cm. 12th snowiest of 13 towns of 2,500+ on Prince Edward Island.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
St. Peters/Monticello publishes no full year of snowfall, so these figures come from Alliston, 42 km away.
Heating a home in Souris
87% of a year’s heating need falls between October and April. Months averaging under 10°C: October to May.
Think of it as a year’s worth of daily shortfalls below 18°C, added up.
Living with Souris’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
From about 28 May to 19 October the garden is usually clear of frost, some 143 days.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul, Aug and Sep.
Parks & trails →A normal year has no blizzard, flood or heat wave in it; Souris’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: St. Peters/Monticello
ECCC builds the St. Peters/Monticello normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 21 km north-west |
| Station altitude | 32 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Alliston, 42 km |
| Coldest reading, 1991–2020 | −34.5°C |
| Hottest reading, 1991–2020 | 34.0°C |
| Next-nearest location | East Point, 23 km |
How Souris compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used on Prince Edward Island.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Souris’s would only repeat its figures. The nearest places to Souris with figures are 34–58 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Souris St. Peters/Monticello | 23.4°C | −9.9°C | 1,116 mm |
| Three Rivers 34 km · Alliston | 24.3°C 0.9°C warmer | −9.7°C about the same | 1,263 mm |
| Vernon River 51 km · Charlottetown (Airport) | 23.6°C about the same | −11.5°C 1.6°C colder | 1,136 mm |
Souris weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −2.1°C | −9.9°C | −6.0°C | 88 mm | 60 cm |
| February | −2.5°C | −10.5°C | −6.5°C | 73 mm | 68 cm |
| March | 1.2°C | −6.2°C | −2.5°C | 86 mm | 42 cm |
| April | 6.7°C | −1.1°C | 2.8°C | 81 mm | 14 cm |
| May | 13.3°C | 3.9°C | 8.6°C | 76 mm | 1 cm |
| June | 18.9°C | 9.6°C | 14.3°C | 83 mm | 0 cm |
| July | 23.4°C | 14.4°C | 18.9°C | 84 mm | 0 cm |
| August | 23.1°C | 14.4°C | 18.8°C | 90 mm | 0 cm |
| September | 19.1°C | 10.8°C | 14.9°C | 103 mm | 0 cm |
| October | 12.8°C | 5.7°C | 9.2°C | 121 mm | under 1 cm |
| November | 7.2°C | 0.7°C | 3.9°C | 114 mm | 14 cm |
| December | 1.6°C | −4.8°C | −1.6°C | 116 mm | 50 cm |
| Year | 10.2°C | 2.2°C | 6.2°C | 1,116 mm | 248 cm |
A March here can run from −26.0°C to 23.6°C
February is the least predictable month: about two years in three its average lands within 2.2°C of the normal, −6.5°C. August is the steadiest, within 0.9°C.
Where Souris’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at St. Peters/Monticello, the closest ECCC location with twelve months of temperature normals.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- 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: 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 Souris’s climate
How warm does Souris get in summer?
At its warmest, in July, the normal high is 23.4°C.
How cold does Souris get in winter?
Overnight lows average −10.5°C in February, the coldest month.
How much rain and snow does Souris get?
About 1,116 mm a year, rain and melted snow together. October is the wettest month (121 mm) and February the driest (73 mm).
Are these figures for Souris itself?
The figures are ECCC’s for St. Peters/Monticello; Souris has no normals station.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Souris →
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).