Photo: Carboj · CC BY-SA 4.0Wet weather: 1,216 mm of rain and snow a year falls on Montmagny, more than on 90% of Canadian towns
Sunny July days climb to about 25.0°C. Rain or snow is most frequent in July and least in March. By January nights alone, it runs colder than 71% of Canadian towns. Windshields need scraping on about 165 mornings a year, the days the air reaches 0°C or below.
These are not Montmagny’s own readings: ECCC keeps no normals there, so the page uses Cap-Tourmente, 20 km north-west.
A year in Montmagny at a glance
Each month’s typical high and low, in °C.
What stands out about Montmagny’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Montmagny feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 165 days, 20°C on 99
Frost comes from October to May; in January almost every night freezes. On about 20 nights a year the air falls below −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 1,216 mm a year
Some 142 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Cap-Tourmente publishes no full year of precipitation or snowfall, so these figures, and the snow below, come from Lauzon, 45 km away.
299 cm of snow in a typical year
From October to April snow is likely; December is the peak, at about 77 cm.
Snowfall by month
Centimetres
Heating a home in Montmagny
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
One degree below 18°C for one day makes one heating degree day; the year’s days are added together.
Living with Montmagny’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Tender plants are usually safe from around 8 May until frost returns near 7 October: about 151 days.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →Bitter wind chill, under −20, comes on about 40 days a year.
Count on some 35 humid days a year with the humidex past 30.
Extremes don’t show in averages: floods, wildfire smoke and ice storms are on Montmagny’s hazards page.
Flood & hazards →ECCC’s normals location: Cap-Tourmente
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Cap-Tourmente.
| Distance from the town | 20 km north-west |
| Station altitude | 6 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Precipitation from | Lauzon, 45 km |
| Coldest reading, 1991–2020 | −33.5°C |
| Hottest reading, 1991–2020 | 35.1°C |
| Average wind | 9.3 km/h on average, most often from the west |
| Next-nearest location | Saint Michel, 27 km |
How Montmagny 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
The nearest places on a normals location of their own: those that share Montmagny’s would only repeat its figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Montmagny Cap-Tourmente | 25.0°C | −14.8°C | 1,216 mm |
| Cap-Saint-Ignace 9.8 km · Cap-Tourmente | 25.0°C about the same | −14.8°C about the same | 906 mm |
| Berthier-sur-Mer 13 km · Saint Michel | 25.1°C about the same | −16.0°C 1.2°C colder | 1,216 mm |
Montmagny 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 | −5.4°C | −14.8°C | −10.1°C | 80 mm | 62 cm |
| February | −3.7°C | −13.9°C | −8.8°C | 80 mm | 71 cm |
| March | 1.3°C | −8.1°C | −3.4°C | 78 mm | 51 cm |
| April | 8.8°C | −0.9°C | 4.0°C | 95 mm | 12 cm |
| May | 16.9°C | 5.7°C | 11.3°C | 98 mm | 0 cm |
| June | 22.1°C | 10.9°C | 16.5°C | 120 mm | 0 cm |
| July | 25.0°C | 14.0°C | 19.5°C | 129 mm | 0 cm |
| August | 24.2°C | 13.3°C | 18.8°C | 117 mm | 0 cm |
| September | 19.5°C | 9.2°C | 14.4°C | 123 mm | 0 cm |
| October | 12.2°C | 3.1°C | 7.7°C | 112 mm | 2 cm |
| November | 4.9°C | −2.6°C | 1.2°C | 84 mm | 24 cm |
| December | −2.0°C | −10.2°C | −6.1°C | 101 mm | 77 cm |
| Year | 10.3°C | 0.5°C | 5.4°C | 1,216 mm | 299 cm |
Two years in three, January’s average lands within 2.6°C of normal, against the steadier July
Records from 1991 to 2020: no month spans more than March, between −29.0°C (2007) and 20.2°C (2012).
Where Montmagny’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Cap-Tourmente, the nearest location with a full year of temperatures.
- Other locations: where a location publishes no full year of precipitation or snowfall, the nearest one that does supplies it, named beside those figures.
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- 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 Montmagny’s climate
How warm does Montmagny get in summer?
Peak warmth comes in July, at about 25.0°C by mid-afternoon.
How cold does Montmagny get in winter?
Lows sink to −14.8°C on an average January night.
How much rain and snow does Montmagny get?
The year adds up to 1,216 mm. July is the peak month (129 mm) and March the low one (78 mm).
Are these figures for Montmagny itself?
Not directly: Montmagny has no ECCC normals of its own, and Cap-Tourmente stands in for it.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Montmagny →
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).