Photo: Simon Villeneuve · CC BY-SA 3.0Lac-Mégantic is wetter than 83% of Canadian towns: 1,130 mm of rain and snow a year
July afternoons average 24.5°C. About 187 nights a year bring a frost, more than in 74% of Canadian towns. The seasons are far apart: from a winter night to a summer afternoon the average spans 40°C. From June to August, highs of 22–25°C make it easy to spend the day outdoors.
No ECCC station in Lac-Mégantic has 1991–2020 normals; the page reads St Ludger, 25 km north-east, instead.
A year in Lac-Mégantic at a glance
Each month’s typical high and low, in °C.
What stands out about Lac-Mégantic’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Lac-Mégantic feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 187 frosts and 96 warm days a year
Frost comes from September to May; in January almost every night freezes. Some 26 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 1,130 mm a year
July is the wettest month and March the driest. On about 148 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 287 cm in a normal year
From October to May snow is likely; February is the peak, at about 65 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Lac-Mégantic
89% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Measured against 18°C: each day’s shortfall in mean temperature, added over twelve months. A house here needs more heating than 72% of Canadian towns.
Living with Lac-Mégantic’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul and Aug.
Parks & trails →Ice storms, floods and heat waves are risks, not averages: they are on Lac-Mégantic’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 | 25 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, 64 km |
How Lac-Mégantic 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 Lac-Mégantic’s own would show the same figures). The nearest places to Lac-Mégantic with figures are 35–45 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Lac-Mégantic St Ludger | 24.5°C | −15.9°C | 1,130 mm |
| Lambton 35 km · Thetford Mines | 23.5°C 1.0°C cooler | −16.1°C about the same | 1,324 mm |
| Saint-Honoré-de-Shenley 44 km · St Georges | 25.3°C 0.8°C warmer | −16.7°C 0.8°C colder | 1,054 mm |
| Bury 45 km · Sherbrooke | 25.3°C 0.8°C warmer | −16.5°C 0.6°C colder | 1,015 mm |
Lac-Mégantic 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 |
January varies most from one year to the next (3.1°C), August least
January has the widest record range, −38.0°C in 1995 to 18.0°C in 1995; the tick on each bar is the month’s normal.
Where Lac-Mégantic’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at St Ludger (the closest location with all twelve months of temperatures).
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- 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 Lac-Mégantic’s climate
How warm does Lac-Mégantic get in summer?
Highs reach 24.5°C on an average July day; no month is warmer.
How cold does Lac-Mégantic get in winter?
At its coldest, in January, the normal low is −15.9°C.
How much rain and snow does Lac-Mégantic get?
Rain and snow add up to about 1,130 mm of water a year; July brings the most (115 mm), March the least (77 mm).
How long does snow stay on the ground?
Count on about 127 days of snow cover a year, 1 cm or deeper.
Are these figures for Lac-Mégantic itself?
No, the station behind them is St Ludger, beyond Lac-Mégantic’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Lac-Mégantic →
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).