Photo: Gabriel Picard · CC BY-SA 4.0Precipitation in Lambton tops that of 93% of Canadian towns: 1,324 mm a year
The warmest part of a July day comes in at 23.5°C on average. The wettest month is July; the driest is November. In July, afternoons here are cooler than in 80% of Canadian towns. Comfortable outdoor weather lasts from June to September, with highs of 18–24°C.
These are not Lambton’s own readings: ECCC keeps no normals there, so the page uses Thetford Mines, 33 km north-west.
A year in Lambton at a glance
Each month’s typical high and low, in °C.
What stands out about Lambton’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Lambton feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
About 177 frosts and 87 warm days a year
From September to May frost is routine, and in January it comes on almost every night. Deep cold, under −20°C, comes on about 25 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,324 mm of rain and snow a year
7th wettest of 514 towns of 2,500+ in Quebec. Some 167 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 358 cm in a normal year
Snow falls from October to May, most of all in December (about 81 cm). 6th snowiest of 494 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 Lambton
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The count adds up, day by day, how far the mean temperature falls short of 18°C. Over a year, a home here needs more heating than 72% of Canadian towns.
Living with Lambton’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Storms, floods and heat waves sit outside these normals; Lambton’s hazards page covers them.
Flood & hazards →ECCC’s normals location: Thetford Mines
Thetford Mines is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 33 km north-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 Ludger, 34 km |
How Lambton 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 Quebec.
Nearby towns’ climate
Places around Lambton whose figures come from another normals location. Distances here run 18–25 km: that is how far the nearest places with figures are from Lambton.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Lambton Thetford Mines | 23.5°C | −16.1°C | 1,324 mm |
| La Guadeloupe 18 km · St Georges | 25.3°C 1.8°C warmer | −16.7°C 0.6°C colder | 1,054 mm |
| Lac-Drolet 23 km · St Ludger | 24.5°C 1.0°C warmer | −15.9°C about the same | 1,130 mm |
Lambton 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 | −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
The month to count on least is January: one year in three its average strays more than 2.9°C from −11.5°C. August moves least, typically by 1.1°C.
Where Lambton’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, 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 Lambton’s climate
How warm does Lambton get in summer?
The warmest month is July, when afternoons average 23.5°C.
How cold does Lambton get in winter?
At its coldest, in January, the normal low is −16.1°C.
How much rain and snow does Lambton get?
July is the wettest month at 140 mm and November the driest at 91 mm, for 1,324 mm over the year.
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 Lambton itself?
They come from Thetford Mines, which ECCC uses as the nearest normals location for Lambton.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Lambton →
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).