Photo: Robert Garry · CC BY-SA 4.0Thetford Mines is wetter than 93% of Canadian towns: 1,324 mm of rain and snow a year
On a normal July day the thermometer tops out near 23.5°C. By July afternoons alone, it runs cooler than 80% of Canadian towns. The gap between a January night and a July afternoon is 40°C. Frost comes on about 177 days a year, so leave time to clear the car.
Figures: ECCC’s 1991–2020 normals at Thetford Mines (3.7 km west).
A year in Thetford Mines at a glance
Each month’s typical high and low, in °C.
What stands out about Thetford Mines’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Thetford Mines feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
177 frost days and 87 days above 20°C a year
Frost comes from September to May; in January almost every night freezes. Some 25 nights a year drop under −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 1,324 mm a year
July brings the most rain and snow; November, the least. 7th wettest of 513 towns of 2,500+ in Quebec. On about 167 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
358 cm of snow in a typical year
The snow season runs October to May; December brings the most, about 81 cm. 6th snowiest of 493 towns of 2,500+ in Quebec.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Thetford Mines
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year. In heating terms, homes need more heating than 72% of Canadian towns.
Living with Thetford Mines’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul, Aug and Sep.
Parks & trails →Storms, floods and heat waves sit outside these normals; Thetford Mines’s hazards page covers them.
Flood & hazards →ECCC’s normals location: Thetford Mines
Behind the 1991–2020 normals for Thetford Mines are 2 stations, which ECCC combines into one record.
| Distance from the town | 3.7 km west |
| Station altitude | 381 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −35.0°C |
| Hottest reading, 1991–2020 | 32.5°C |
| Next-nearest location | St Georges, 47 km |
How Thetford Mines 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
Nearby places read from a different ECCC location (places on Thetford Mines’s own would show the same figures). Distances here run 27–30 km: that is how far the nearest places with figures are from Thetford Mines.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Thetford Mines | 23.5°C | −16.1°C | 1,324 mm |
| Saint-Éphrem-de-Beauce 27 km · St Georges | 25.3°C 1.8°C warmer | −16.7°C 0.6°C colder | 1,054 mm |
| Saint-Sylvestre 30 km · Scott | 25.1°C 1.6°C warmer | −16.5°C about the same | 1,182 mm |
Thetford Mines weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −6.9°C | −16.1°C | −11.5°C | 102 mm | 72 cm |
| February | −5.4°C | −15.0°C | −10.2°C | 92 mm | 80 cm |
| March | 0.3°C | −9.2°C | −4.5°C | 95 mm | 67 cm |
| April | 7.8°C | −1.7°C | 3.1°C | 103 mm | 23 cm |
| May | 16.4°C | 5.3°C | 10.9°C | 107 mm | 2 cm |
| June | 21.3°C | 10.5°C | 15.9°C | 127 mm | 0 cm |
| July | 23.5°C | 13.2°C | 18.4°C | 140 mm | 0 cm |
| August | 22.5°C | 12.3°C | 17.4°C | 129 mm | 0 cm |
| September | 18.3°C | 8.0°C | 13.2°C | 102 mm | 0 cm |
| October | 10.7°C | 2.2°C | 6.4°C | 122 mm | 6 cm |
| November | 3.4°C | −3.9°C | −0.3°C | 91 mm | 28 cm |
| December | −3.5°C | −11.1°C | −7.3°C | 114 mm | 81 cm |
| Year | 9.0°C | −0.5°C | 4.3°C | 1,324 mm | 358 cm |
March: −28.7°C at its coldest, 22.2°C at its warmest
Year to year, January varies most (a standard deviation of 2.9°C around −11.5°C) and August least (1.1°C).
Where Thetford Mines’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Thetford Mines, 1991–2020.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Thetford Mines’s climate
How warm does Thetford Mines get in summer?
The year’s warmest days come in July, with highs averaging 23.5°C.
How cold does Thetford Mines get in winter?
Winter bottoms out in January, with lows near −16.1°C.
How much rain and snow does Thetford Mines get?
Rain and snow add up to about 1,324 mm of water a year; July brings the most (140 mm), November the least (91 mm).
How long does snow stay on the ground?
Snow covers the ground, 1 cm or more, on about 155 days a year.
Are these figures for Thetford Mines itself?
Yes, from ECCC’s station within Thetford Mines’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Thetford Mines →
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).