Few Canadian towns have warmer summer afternoons than Sandwich
The depth of winter brings overnight lows near −7.1°C. Only about 115 nights a year bring a frost, fewer than in 86% of Canadian towns. Of all months, July brings the most precipitation and February the least. About 110 days a year bring 1 mm of precipitation or more.
Environment and Climate Change Canada’s 1991–2020 normals at its Windsor station, 8.9 km east.
A year in Sandwich at a glance
Each month’s typical high and low, in °C.
What stands out about Sandwich’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Sandwich feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 115 frosts and 141 warm days a year
Frost comes from November to April; in January almost every night freezes. Some 24 days a year climb past 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
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 140 cm in a normal year
From November to April snow is likely; January is the peak, at about 43 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Sandwich
95% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year. That means homes here need less heating than 93% of Canadian towns.
Living with Sandwich’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.
The outdoor season by the averages is May, Jun, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Wind chill falls below −20 on about 13 days a year: cover skin and dress in layers.
Count on some 74 humid days a year with the humidex past 30.
Severe weather is a separate story from the averages: see Sandwich’s hazards page.
Flood & hazards →ECCC’s normals location: Windsor
ECCC builds the Windsor normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 8.9 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, 12 km |
How Sandwich 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 Sandwich’s own would show the same figures). Sandwich has few close neighbours with figures, so the list reaches 15–28 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Sandwich Windsor | 28.3°C | −7.1°C | 954 mm |
| Tecumseh 15 km · Windsor Riverside | 29.2°C 0.9°C warmer | −6.3°C 0.8°C milder | 935 mm |
| Amherstburg 20 km · Harrow | 27.6°C 0.7°C cooler | −7.0°C about the same | 827 mm |
Sandwich 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 |
From −22.0°C to 28.4°C: March’s coldest and warmest days since 1991
From one year to the next, January’s average typically shifts by 2.8°C around its normal of −3.6°C, the widest of any month, while June’s shifts by 1.2°C.
Where Sandwich’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Windsor, the nearest location with a full year of temperatures.
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- Not on this page: sunshine, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Sandwich’s climate
How warm does Sandwich get in summer?
Summer peaks in July: a typical afternoon reaches 28.3°C.
How cold does Sandwich get in winter?
Lows sink to −7.1°C on an average January night.
How much rain and snow does Sandwich get?
The yearly total is about 954 mm. July gets 99 mm, the most of any month; February gets 60 mm, the least.
How long does snow stay on the ground?
Around 53 days a year see 1 cm of snow or more lying.
Are these figures for Sandwich itself?
Nearly: Windsor, the location behind them, sits just beyond Sandwich’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Sandwich →
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).