Berthier-sur-Mer is wetter than 90% of Canadian towns: 1,216 mm of rain and snow a year
Peak summer warmth arrives in July, with afternoons near 25.1°C. Rain or snow is most frequent in July and least in March. By January nights alone, it runs colder than 75% of Canadian towns. Plan for rain or snow on about 142 days a year, the days with 1 mm or more.
Berthier-sur-Mer has no ECCC normals station of its own: every figure here comes from Saint Michel, 14 km south-west.
A year in Berthier-sur-Mer at a glance
Each month’s typical high and low, in °C.
What stands out about Berthier-sur-Mer’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Berthier-sur-Mer feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
174 frost days and 96 days above 20°C a year
Frost comes from October to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 23 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,216 mm of rain and snow a year
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Saint Michel publishes no full year of precipitation or snowfall, so these figures, and the snow below, come from Lauzon, 32 km away.
Snowfall: about 299 cm in a normal year
Expect snow from October to April, with about 77 cm in December, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Berthier-sur-Mer
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October 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 more heating than 62% of Canadian towns.
Living with Berthier-sur-Mer’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul, Aug and Sep.
Parks & trails →A typical year is calm by definition; Berthier-sur-Mer’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Saint Michel
The page’s figures are ECCC’s 1991–2020 normals for Saint Michel, one of its 450 normals locations.
| Distance from the town | 14 km south-west |
| Station altitude | 69 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Lauzon, 32 km |
| Coldest reading, 1991–2020 | −35.5°C |
| Hottest reading, 1991–2020 | 35.9°C |
| Next-nearest location | Cap-Tourmente, 17 km |
How Berthier-sur-Mer 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 Berthier-sur-Mer’s own would show the same figures). The one place listed is 13 km from Berthier-sur-Mer, the nearest with figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Berthier-sur-Mer Saint Michel | 25.1°C | −16.0°C | 1,216 mm |
| Montmagny 13 km · Cap-Tourmente | 25.0°C about the same | −14.8°C 1.2°C milder | 1,216 mm |
Berthier-sur-Mer 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 | −6.9°C | −16.0°C | −11.6°C | 80 mm | 62 cm |
| February | −5.0°C | −14.8°C | −10.1°C | 80 mm | 71 cm |
| March | 0.2°C | −8.8°C | −4.6°C | 78 mm | 51 cm |
| April | 7.7°C | −1.3°C | 3.5°C | 95 mm | 12 cm |
| May | 16.9°C | 5.8°C | 11.4°C | 98 mm | 0 cm |
| June | 22.3°C | 11.1°C | 16.9°C | 120 mm | 0 cm |
| July | 25.1°C | 14.1°C | 19.3°C | 129 mm | 0 cm |
| August | 24.2°C | 13.2°C | 18.7°C | 117 mm | 0 cm |
| September | 19.3°C | 8.8°C | 14.1°C | 123 mm | 0 cm |
| October | 11.3°C | 2.8°C | 7.1°C | 112 mm | 2 cm |
| November | 4.0°C | −3.3°C | 0.6°C | 84 mm | 24 cm |
| December | −3.1°C | −10.5°C | −6.7°C | 101 mm | 77 cm |
| Year | 9.7°C | 0.1°C | 4.9°C | 1,216 mm | 299 cm |
January strays furthest from its normal year to year, by 2.9°C; June the least
Over 1991–2020, January saw both −35.5°C (2014) and 13.5°C (1996), the widest span of any month.
Where Berthier-sur-Mer’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Saint Michel, 1991–2020, chosen as the nearest location with a full temperature record.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- 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 Berthier-sur-Mer’s climate
How warm does Berthier-sur-Mer get in summer?
Highs reach 25.1°C on an average July day; no month is warmer.
How cold does Berthier-sur-Mer get in winter?
Deep winter means January, when nights average −16.0°C.
How much rain and snow does Berthier-sur-Mer get?
Rain and snow, with snow counted as water, total 1,216 mm a year; July leads with 129 mm and March trails with 78 mm.
Are these figures for Berthier-sur-Mer itself?
No, they come from Saint Michel; ECCC keeps no 1991–2020 normals in Berthier-sur-Mer itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Berthier-sur-Mer →
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).