Photo: Deconstructhis · Public domainSummer afternoons in Exeter are warmer than in 91% of Canadian towns
The depth of winter brings overnight lows near −8.5°C. By January nights alone, it runs milder than 81% of Canadian towns. Expect the most rain and snow in November and the least in February. If you like long walks, May, June, August and September offer highs of 20–26°C.
No ECCC station in Exeter has 1991–2020 normals; the page reads Strathroy-Mullifarry, 43 km south, instead.
A year in Exeter at a glance
Each month’s typical high and low, in °C.
What stands out about Exeter’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Exeter feels like
Each season’s and each month’s usual high and low, 1991–2020.
137 frost days and 131 days above 20°C a year
The frost season runs October to May, and January freezes nearly every night. Some 17 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
Rain and melted snow: about 966 mm a year
Some 132 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 152 cm of snow a year
Expect snow from October to April, with about 43 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Exeter
93% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
The total grows by a degree for every degree a day’s mean sits under 18°C. By this count, homes here need less heating than 86% of Canadian towns.
Living with Exeter’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
From about 8 May to 11 October the garden is usually clear of frost, some 155 days.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: May, Jun, Aug and Sep.
Parks & trails →For blizzards, floods and wildfire, turn to Exeter’s hazards page.
Flood & hazards →ECCC’s normals location: Strathroy-Mullifarry
ECCC builds the Strathroy-Mullifarry normals from 2 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 43 km south |
| Station altitude | 229 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | Yes |
| Coldest reading, 1991–2020 | −32.5°C |
| Hottest reading, 1991–2020 | 37.5°C |
| Next-nearest location | London, 44 km |
How Exeter compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Ontario.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Exeter’s would only repeat its figures.
Exeter 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 | −1.5°C | −8.5°C | −5.0°C | 81 mm | 43 cm |
| February | −0.4°C | −8.3°C | −4.4°C | 62 mm | 32 cm |
| March | 5.1°C | −3.8°C | 0.7°C | 66 mm | 20 cm |
| April | 12.7°C | 2.1°C | 7.4°C | 88 mm | 5 cm |
| May | 19.9°C | 8.2°C | 14.1°C | 84 mm | under 1 cm |
| June | 25.0°C | 13.5°C | 19.3°C | 86 mm | 0 cm |
| July | 27.3°C | 15.7°C | 21.5°C | 78 mm | 0 cm |
| August | 26.2°C | 14.8°C | 20.5°C | 81 mm | 0 cm |
| September | 22.8°C | 11.1°C | 17.0°C | 88 mm | 0 cm |
| October | 15.3°C | 5.8°C | 10.6°C | 84 mm | 2 cm |
| November | 7.8°C | 0.4°C | 4.1°C | 90 mm | 13 cm |
| December | 1.5°C | −4.7°C | −1.6°C | 79 mm | 37 cm |
| Year | 13.5°C | 3.9°C | 8.7°C | 966 mm | 152 cm |
March: −28.0°C at its coldest, 27.5°C at its warmest
The month to count on least is February: one year in three its average strays more than 3.2°C from −4.4°C. June moves least, typically by 1.2°C.
Where Exeter’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Strathroy-Mullifarry, the closest ECCC location with twelve months of temperature normals.
- 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: 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 Exeter’s climate
How warm does Exeter get in summer?
Peak warmth comes in July, at about 27.3°C by mid-afternoon.
How cold does Exeter get in winter?
The year’s coldest nights belong to January, at about −8.5°C.
How much rain and snow does Exeter get?
Around 966 mm a year in all, from 90 mm in November down to 62 mm in February.
How long does snow stay on the ground?
Around 80 days a year see 1 cm of snow or more lying.
Are these figures for Exeter itself?
They are the closest available: the normals for Strathroy-Mullifarry, since Exeter has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Exeter →
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).