Mercier has warmer summer afternoons than 78% of Canadian towns
The depth of winter brings overnight lows near −13.5°C. Precipitation is plentiful here, more than falls on 74% of Canadian towns. The seasons are far apart: from a winter night to a summer afternoon the average spans 40°C. Plan for rain or snow on about 122 days a year, the days with 1 mm or more.
Mercier has no ECCC normals station of its own: every figure here comes from Montréal Trudeau (Airport), 17 km north.
A year in Mercier at a glance
Each month’s typical high and low, in °C.
What stands out about Mercier’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Mercier feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
146 frost days and 121 days above 20°C a year
Frost comes from October to April; in January almost every night freezes. Deep cold, under −20°C, comes on about 12 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,041 mm of rain and snow a year
October brings the most rain and snow; February, the least.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
217 cm of snow in a typical year
From October to April snow is likely; January is the peak, at about 52 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Mercier
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Every day colder than 18°C on average adds its gap in degrees to the year’s heating total. That means homes here need less heating than 62% of Canadian towns.
Living with Mercier’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The frost-free stretch runs from about 29 April to about 14 October, some 167 days in a normal year.
Plan time outside for May, Jun, Jul, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →Count on some 40 days a year when the wind makes it feel below −20.
Humid summer days, the humidex above 30, number about 50 a year.
For the weather that does damage, from ice storms to floods, see Mercier’s hazards page.
Flood & hazards →ECCC’s normals location: Montréal Trudeau (Airport)
Behind the 1991–2020 normals for Montréal Trudeau (Airport) are 3 stations, which ECCC combines into one record.
| Distance from the town | 17 km north |
| Station altitude | 36 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −31.8°C |
| Hottest reading, 1991–2020 | 36.6°C |
| Average wind | 15.4 km/h on average, most often from the west |
| Next-nearest location | L'Acadie, 31 km |
How Mercier 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 Mercier whose figures come from another normals location. No closer place has figures: this one lies 11 km from Mercier.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Mercier Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Saint-Rémi 11 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
Mercier 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 | −5.0°C | −13.5°C | −9.2°C | 86 mm | 52 cm |
| February | −3.4°C | −12.4°C | −8.0°C | 66 mm | 47 cm |
| March | 2.4°C | −6.5°C | −2.0°C | 77 mm | 37 cm |
| April | 11.3°C | 1.1°C | 6.2°C | 90 mm | 15 cm |
| May | 19.4°C | 8.3°C | 13.9°C | 86 mm | 0 cm |
| June | 24.2°C | 13.8°C | 19.0°C | 84 mm | 0 cm |
| July | 26.7°C | 16.7°C | 21.7°C | 91 mm | 0 cm |
| August | 25.7°C | 15.6°C | 20.6°C | 94 mm | 0 cm |
| September | 21.1°C | 10.9°C | 16.0°C | 89 mm | 0 cm |
| October | 13.2°C | 4.5°C | 8.9°C | 103 mm | 1 cm |
| November | 6.1°C | −1.7°C | 2.3°C | 84 mm | 16 cm |
| December | −1.2°C | −8.7°C | −5.0°C | 92 mm | 48 cm |
| Year | 11.7°C | 2.3°C | 7.0°C | 1,041 mm | 217 cm |
The month with the widest range: March, −26.9°C to 25.8°C
January is the least predictable month: about two years in three its average lands within 3.0°C of the normal, −9.2°C. June is the steadiest, within 1.1°C.
Where Mercier’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Montréal Trudeau (Airport), 1991–2020.
- Comparisons: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Mercier’s climate
How warm does Mercier get in summer?
On a normal day in July the thermometer climbs to 26.7°C, the warmest of the year.
How cold does Mercier get in winter?
Winter bottoms out in January, with lows near −13.5°C.
How much rain and snow does Mercier get?
1,041 mm a year counting snow as water. The wettest month is October (103 mm); the driest, February (66 mm).
How long does snow stay on the ground?
Snow covers the ground, 1 cm or more, on about 101 days a year.
Are these figures for Mercier itself?
They are borrowed from Montréal Trudeau (Airport), the nearest place to Mercier where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Mercier →
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).