More rain and snow fall on Mont-Saint-Hilaire than on 82% of Canadian towns: 1,109 mm a year
On a normal January night the air cools to about −14.8°C. By January nights alone, it runs colder than 71% of Canadian towns. Winter and summer sit 41°C apart. Plan for rain or snow on about 145 days a year, the days with 1 mm or more.
The nearest ECCC normals location to Mont-Saint-Hilaire is Fleury, 30 km north-east, and every figure on this page is its.
A year in Mont-Saint-Hilaire at a glance
Each month’s typical high and low, in °C.
What stands out about Mont-Saint-Hilaire’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Mont-Saint-Hilaire feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 161 days, 20°C on 115
From September to May frost is routine, and in January it comes on almost every night. Deep cold, under −20°C, comes on about 20 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
1,109 mm of precipitation in a typical year
August brings the most rain and snow; February, the least.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 202 cm in a normal year
Snow falls from October to April, most of all in December (about 49 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Mont-Saint-Hilaire
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A day averaging 10 degrees under 18°C adds 10 to the total; warm days add nothing.
Living with Mont-Saint-Hilaire’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Wait until about 12 May to plant out; frost tends to come back around 27 September, about 136 days later.
Afternoons of 17–27°C and nights of at least 8°C arrive in Jun, Jul, Aug and Sep.
Parks & trails →Ice storms, floods and heat waves are risks, not averages: they are on Mont-Saint-Hilaire’s hazards page.
Flood & hazards →ECCC’s normals location: Fleury
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Fleury.
| Distance from the town | 30 km north-east |
| Station altitude | 31 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −39.0°C |
| Hottest reading, 1991–2020 | 35.1°C |
| Next-nearest location | L'Assomption, 33 km |
How Mont-Saint-Hilaire compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Quebec.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Mont-Saint-Hilaire’s own would show the same figures).
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Mont-Saint-Hilaire Fleury | 26.0°C | −14.8°C | 1,109 mm |
| Beloeil 2.2 km · Fleury | 26.0°C about the same | −14.8°C about the same | 1,109 mm |
| Otterburn Park 3.5 km · L'Acadie | 26.6°C 0.6°C warmer | −13.6°C 1.2°C milder | 1,109 mm |
| Saint-Mathieu-de-Beloeil 5.8 km · L'Assomption | 26.6°C 0.6°C warmer | −16.0°C 1.2°C colder | 1,109 mm |
Mont-Saint-Hilaire 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 | −5.8°C | −14.8°C | −10.5°C | 81 mm | 45 cm |
| February | −3.8°C | −13.6°C | −8.6°C | 61 mm | 43 cm |
| March | 1.8°C | −7.3°C | −2.7°C | 71 mm | 38 cm |
| April | 10.5°C | 0.6°C | 5.8°C | 96 mm | 13 cm |
| May | 19.1°C | 7.4°C | 13.2°C | 98 mm | under 1 cm |
| June | 23.9°C | 12.7°C | 18.4°C | 102 mm | 0 cm |
| July | 26.0°C | 14.9°C | 20.2°C | 106 mm | 0 cm |
| August | 25.0°C | 13.7°C | 19.3°C | 114 mm | 0 cm |
| September | 20.7°C | 9.4°C | 15.1°C | 97 mm | 0 cm |
| October | 13.0°C | 3.6°C | 8.4°C | 108 mm | 2 cm |
| November | 5.5°C | −2.0°C | 1.9°C | 90 mm | 12 cm |
| December | −2.0°C | −9.3°C | −5.9°C | 85 mm | 49 cm |
| Year | 11.2°C | 1.3°C | 6.2°C | 1,109 mm | 202 cm |
From −31.0°C to 25.5°C: March’s coldest and warmest days since 1991
The month to count on least is January: one year in three its average strays more than 3.1°C from −10.5°C. August moves least, typically by 0.9°C.
Where Mont-Saint-Hilaire’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Fleury, 1991–2020, chosen as the nearest location with a full temperature record.
- 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 Mont-Saint-Hilaire’s climate
How warm does Mont-Saint-Hilaire get in summer?
On a normal day in July the thermometer climbs to 26.0°C, the warmest of the year.
How cold does Mont-Saint-Hilaire get in winter?
In January, the coldest month, the typical low is −14.8°C.
How much rain and snow does Mont-Saint-Hilaire get?
The year adds up to 1,109 mm. August is the peak month (114 mm) and February the low one (61 mm).
How long does snow stay on the ground?
On about 106 days a year the ground keeps at least 1 cm of snow.
Are these figures for Mont-Saint-Hilaire itself?
No: Mont-Saint-Hilaire has no normals location, so the figures come from Fleury, the nearest with 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Mont-Saint-Hilaire →
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).