Frost comes to Southcrest less often than to 75% of Canadian towns
High summer brings afternoon highs near 26.6°C. Precipitation peaks in September and eases off in February. By July afternoons alone, it runs hotter than 70% of Canadian towns. About 128 days a year bring 1 mm of precipitation or more.
Figures: ECCC’s 1991–2020 normals for London (13 km north-east).
A year in Southcrest at a glance
Each month’s typical high and low, in °C.
What stands out about Southcrest’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Southcrest feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 139 frosts and 128 warm days a year
From October to May frost is routine, and in January it comes on almost every night. Heat of 30°C or more comes on about 11 days a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
962 mm of precipitation in a typical year
Rain and snow by month
Millimetres
About 152 cm of snow a year
The snow season runs October to April; January brings the most, about 43 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
ECCC’s London normals leave snowfall out; the figures here come from Strathroy-Mullifarry, 30 km away.
Heating a home in Southcrest
92% 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. In heating terms, homes need less heating than 79% of Canadian towns.
Living with Southcrest’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Wait until about 3 May to plant out; frost tends to come back around 16 October, about 165 days later.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul, Aug and Sep.
Parks & trails →Frostbite weather, a wind chill under −20, turns up on about 18 days a year.
On some 55 days a year the humidex climbs past 30.
Averages smooth over blizzards, ice storms, floods and heat waves; Southcrest’s hazards page covers the risks.
Flood & hazards →ECCC’s normals location: London
Behind the 1991–2020 normals for London are 3 stations, which ECCC combines into one record.
| Distance from the town | 13 km north-east |
| Station altitude | 278 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Strathroy-Mullifarry, 30 km |
| Coldest reading, 1991–2020 | −29.1°C |
| Hottest reading, 1991–2020 | 37.0°C |
| Average wind | 14.0 km/h on average, most often from the west |
| Next-nearest location | Strathroy-Mullifarry, 30 km |
How Southcrest 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
Nearby places read from a different ECCC location (places on Southcrest’s own would show the same figures). No closer places have figures: these lie 18–39 km from Southcrest.
Southcrest 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 | −1.6°C | −9.1°C | −5.4°C | 79 mm | 43 cm |
| February | −0.6°C | −9.0°C | −4.8°C | 63 mm | 32 cm |
| March | 4.6°C | −4.5°C | 0.1°C | 67 mm | 20 cm |
| April | 12.2°C | 1.4°C | 6.8°C | 89 mm | 5 cm |
| May | 19.3°C | 7.7°C | 13.5°C | 89 mm | under 1 cm |
| June | 24.4°C | 13.2°C | 18.8°C | 86 mm | 0 cm |
| July | 26.6°C | 15.3°C | 21.0°C | 81 mm | 0 cm |
| August | 25.7°C | 14.4°C | 20.1°C | 67 mm | 0 cm |
| September | 22.1°C | 10.5°C | 16.3°C | 93 mm | 0 cm |
| October | 14.7°C | 5.0°C | 9.9°C | 83 mm | 2 cm |
| November | 7.5°C | −0.3°C | 3.6°C | 88 mm | 13 cm |
| December | 1.4°C | −5.2°C | −2.0°C | 79 mm | 37 cm |
| Year | 13.0°C | 3.3°C | 8.2°C | 962 mm | 152 cm |
The month with the widest range: March, −25.6°C to 27.2°C
Bars run from each month’s record low to its record high over 1991–2020; February is the month whose average wanders most from year to year (±3.0°C around −4.8°C), June the one that wanders least (±1.1°C).
Where Southcrest’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at London, 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: 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 Southcrest’s climate
How warm does Southcrest get in summer?
At its warmest, in July, the normal high is 26.6°C.
How cold does Southcrest get in winter?
On a normal January night the air drops to −9.1°C, the coldest of the year.
How much rain and snow does Southcrest get?
Over twelve months, rain and melted snow come to 962 mm; the range runs from 63 mm in February to 93 mm in September.
Are these figures for Southcrest itself?
They are the normals for London, measured just outside Southcrest itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Southcrest →
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).