Photo: Richard Coté · CC BY-SA 4.0More rain and snow fall on Frontenac than on 83% of Canadian towns: 1,130 mm a year
On a normal January night the air cools to about −15.9°C. A year here swings 40°C from midwinter lows to midsummer highs. Frost is common: about 187 nights a year drop below freezing, more than in 74% of Canadian towns. Plan time outside from June to August, when highs sit at 22–25°C.
ECCC publishes no normals for Frontenac itself; the figures are those of St Ludger, 26 km north-east.
A year in Frontenac at a glance
Each month’s typical high and low, in °C.
What stands out about Frontenac’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Frontenac feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
187 frost days and 96 days above 20°C a year
The frost season runs September to May, and January freezes nearly every night. On about 26 nights a year the air falls below −20°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 1,130 mm a year
The most falls in July, the least in March. Some 148 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 287 cm of snow a year
Snow falls from October to May, most of all in February (about 65 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Frontenac
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A day averaging 10 degrees under 18°C adds 10 to the total; warm days add nothing. Homes here need more heating than 72% of Canadian towns.
Living with Frontenac’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul and Aug.
Parks & trails →For blizzards, floods and wildfire, turn to Frontenac’s hazards page.
Flood & hazards →ECCC’s normals location: St Ludger
St Ludger is one of the 450 places where ECCC publishes 1991–2020 normals.
| Distance from the town | 26 km north-east |
| Station altitude | 335 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −39.5°C |
| Hottest reading, 1991–2020 | 33.3°C |
| Next-nearest location | Sherbrooke, 66 km |
How Frontenac 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 Quebec.
Nearby towns’ climate
Places around Frontenac whose figures come from another normals location. No closer places have figures: these lie 39–48 km from Frontenac.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Frontenac St Ludger | 24.5°C | −15.9°C | 1,130 mm |
| Lambton 39 km · Thetford Mines | 23.5°C 1.0°C cooler | −16.1°C about the same | 1,324 mm |
| Saint-Honoré-de-Shenley 47 km · St Georges | 25.3°C 0.8°C warmer | −16.7°C 0.8°C colder | 1,054 mm |
| Bury 47 km · Sherbrooke | 25.3°C 0.8°C warmer | −16.5°C 0.6°C colder | 1,015 mm |
Frontenac 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 | −5.5°C | −15.9°C | −10.9°C | 93 mm | 60 cm |
| February | −4.0°C | −15.3°C | −9.7°C | 80 mm | 65 cm |
| March | 1.4°C | −9.6°C | −4.1°C | 77 mm | 50 cm |
| April | 9.1°C | −2.0°C | 3.8°C | 87 mm | 16 cm |
| May | 17.4°C | 4.4°C | 10.8°C | 98 mm | 1 cm |
| June | 22.1°C | 9.8°C | 16.0°C | 113 mm | 0 cm |
| July | 24.5°C | 12.8°C | 18.5°C | 115 mm | 0 cm |
| August | 23.5°C | 11.5°C | 17.5°C | 107 mm | 0 cm |
| September | 19.4°C | 7.2°C | 13.3°C | 90 mm | 0 cm |
| October | 11.8°C | 1.5°C | 6.5°C | 103 mm | 7 cm |
| November | 4.5°C | −4.2°C | 0.2°C | 80 mm | 24 cm |
| December | −2.1°C | −11.0°C | −7.0°C | 88 mm | 64 cm |
| Year | 10.2°C | −0.9°C | 4.6°C | 1,130 mm | 287 cm |
A January here can run from −38.0°C to 18.0°C
Two years in three, January’s average falls within 3.1°C of its normal of −10.9°C; August keeps to within 1.0°C.
Where Frontenac’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at St Ludger, the closest ECCC location with twelve months of temperature normals.
- 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, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Frontenac’s climate
How warm does Frontenac get in summer?
Summer peaks in July: a typical afternoon reaches 24.5°C.
How cold does Frontenac get in winter?
The year’s coldest nights belong to January, at about −15.9°C.
How much rain and snow does Frontenac get?
A normal year brings 1,130 mm, snow included as water: July is wettest at 115 mm, March driest at 77 mm.
How long does snow stay on the ground?
About 127 days a year count as snow-covered, with 1 cm or more.
Are these figures for Frontenac itself?
Not directly: Frontenac has no ECCC normals of its own, and St Ludger stands in for it.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Frontenac →
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).