Few Canadian towns have warmer summer afternoons than South Windsor
Deep winter brings January lows near −7.1°C. By frosts alone, it ranks gentler than 86% of Canadian towns. Temperatures cover 35°C across the year, low to high. Comfortable outdoor weather, highs of 21–27°C, belongs to May, June, August and September.
Read at Windsor, 5.3 km east: ECCC’s normals for 1991–2020.
A year in South Windsor at a glance
Each month’s typical high and low, in °C.
What stands out about South Windsor’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in South Windsor feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
About 115 frosts and 141 warm days a year
Frost comes from November to April; in January almost every night freezes. About 24 days a year top 30°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 954 mm of rain and snow a year
The most falls in July, the least in February. On about 110 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 140 cm in a normal year
The snow season runs November to April; January brings the most, about 43 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in South Windsor
95% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
One degree below 18°C for one day makes one heating degree day; the year’s days are added together. A house here needs less heating than 93% of Canadian towns.
Living with South Windsor’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Seedlings can go out once the average last frost, around 17 April, has passed; autumn’s first, near 1 November, ends a season of about 197 days.
Plan time outside for May, Jun, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →About 13 days a year bring a wind chill under −20, when bare skin chills fast.
Roughly 74 days a year feel hotter than 30 once humidity is counted.
Bad-weather days, from blizzards to floods, get their own page for South Windsor: the hazards page.
Flood & hazards →ECCC’s normals location: Windsor
Windsor is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 5.3 km east |
| Station altitude | 190 m |
| Completeness | at least 25 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −29.1°C |
| Hottest reading, 1991–2020 | 38.3°C |
| Average wind | 15.6 km/h on average, most often from the south-west |
| Next-nearest location | Windsor Riverside, 11 km |
How South Windsor 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 Ontario.
Nearby towns’ climate
Places around South Windsor whose figures come from another normals location. No closer places have figures: these lie 13–24 km from South Windsor.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| South Windsor Windsor | 28.3°C | −7.1°C | 954 mm |
| Tecumseh 13 km · Windsor Riverside | 29.2°C 0.9°C warmer | −6.3°C 0.8°C milder | 935 mm |
| Amherstburg 18 km · Harrow | 27.6°C 0.7°C cooler | −7.0°C about the same | 827 mm |
South Windsor weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | 0.0°C | −7.1°C | −3.6°C | 71 mm | 43 cm |
| February | 1.3°C | −6.4°C | −2.6°C | 60 mm | 33 cm |
| March | 6.8°C | −2.1°C | 2.4°C | 71 mm | 23 cm |
| April | 14.0°C | 3.5°C | 8.8°C | 92 mm | 6 cm |
| May | 20.7°C | 9.8°C | 15.3°C | 97 mm | 0 cm |
| June | 26.0°C | 15.5°C | 20.8°C | 83 mm | 0 cm |
| July | 28.3°C | 18.0°C | 23.2°C | 99 mm | 0 cm |
| August | 27.0°C | 17.1°C | 22.1°C | 76 mm | 0 cm |
| September | 23.1°C | 13.0°C | 18.1°C | 88 mm | 0 cm |
| October | 16.1°C | 6.9°C | 11.6°C | 74 mm | under 1 cm |
| November | 8.9°C | 1.4°C | 5.2°C | 73 mm | 5 cm |
| December | 2.7°C | −3.5°C | −0.4°C | 69 mm | 30 cm |
| Year | 14.6°C | 5.5°C | 10.1°C | 954 mm | 140 cm |
Two years in three, January’s average lands within 2.8°C of normal, against the steadier June
Records from 1991 to 2020: no month spans more than March, between −22.0°C (2015) and 28.4°C (2012).
Where South Windsor’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Windsor (the closest location with all twelve months of temperatures).
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- 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 South Windsor’s climate
How warm does South Windsor get in summer?
The warmest month is July, when afternoons average 28.3°C.
How cold does South Windsor get in winter?
In January, the coldest month, the typical low is −7.1°C.
How much rain and snow does South Windsor get?
Precipitation totals 954 mm a year, with July the wettest month (99 mm) and February the driest (60 mm).
How long does snow stay on the ground?
On about 53 days a year the ground keeps at least 1 cm of snow.
Are these figures for South Windsor itself?
Nearly: Windsor, the location behind them, sits just beyond South Windsor’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for South Windsor →
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).