January in Charlemagne bites harder than in 75% of Canadian towns
Sunny July days climb to about 26.6°C. From frozen January to warm July, readings climb 43°C. Its yearly rain and snow top those of 74% of Canadian towns. Comfortable outdoor weather lasts from June to September, with highs of 21–27°C.
These are not Charlemagne’s own readings: ECCC keeps no normals there, so the page uses L'Assomption, 11 km north-east.
A year in Charlemagne at a glance
Each month’s typical high and low, in °C.
What stands out about Charlemagne’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Charlemagne feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 161 frosts and 119 warm days a year
The frost season runs October to May, and January freezes nearly every night. Some 24 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 1,041 mm a year
The most falls in October, the least in February. About 122 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Precipitation and snowfall: Montréal Trudeau (Airport), 35 km away (L'Assomption records no complete year of either).
About 217 cm of snow a year
Snow falls from October to April, most of all in January (about 52 cm).
Snowfall by month
Centimetres
Heating a home in Charlemagne
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year.
Living with Charlemagne’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul, Aug and Sep.
Parks & trails →Count on some 44 days a year when the wind makes it feel below −20.
Plan shade and water for about 49 days a year above 30 on the humidex.
A typical year is calm by definition; Charlemagne’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: L'Assomption
L'Assomption is one of the 450 places where ECCC publishes 1991–2020 normals.
| Distance from the town | 11 km north-east |
| Station altitude | 21 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Precipitation from | Montréal Trudeau (Airport), 35 km |
| Coldest reading, 1991–2020 | −40.0°C |
| Hottest reading, 1991–2020 | 36.2°C |
| Average wind | 10.0 km/h on average, most often from the south-west |
| Next-nearest location | Montréal Trudeau (Airport), 35 km |
How Charlemagne 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 Charlemagne’s own would show the same figures). Distances here run 22–23 km: that is how far the nearest places with figures are from Charlemagne.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Charlemagne L'Assomption | 26.6°C | −16.0°C | 1,041 mm |
| Bois-des-Filion 22 km · Montréal Trudeau (Airport) | 26.7°C about the same | −13.5°C 2.5°C milder | 1,041 mm |
| Saint-Marc-sur-Richelieu 23 km · Fleury | 26.0°C 0.6°C cooler | −14.8°C 1.2°C milder | 1,109 mm |
Charlemagne weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −5.9°C | −16.0°C | −10.9°C | 86 mm | 52 cm |
| February | −4.0°C | −14.8°C | −9.4°C | 66 mm | 47 cm |
| March | 1.8°C | −8.3°C | −3.2°C | 77 mm | 37 cm |
| April | 10.8°C | 0.1°C | 5.5°C | 90 mm | 15 cm |
| May | 19.2°C | 7.2°C | 13.2°C | 86 mm | 0 cm |
| June | 24.3°C | 12.4°C | 18.4°C | 84 mm | 0 cm |
| July | 26.6°C | 14.8°C | 20.7°C | 91 mm | 0 cm |
| August | 25.5°C | 13.7°C | 19.6°C | 94 mm | 0 cm |
| September | 21.1°C | 9.2°C | 15.2°C | 89 mm | 0 cm |
| October | 13.0°C | 3.2°C | 8.1°C | 103 mm | 1 cm |
| November | 5.4°C | −2.7°C | 1.3°C | 84 mm | 16 cm |
| December | −1.9°C | −10.2°C | −6.1°C | 92 mm | 48 cm |
| Year | 11.3°C | 0.7°C | 6.0°C | 1,041 mm | 217 cm |
January strays furthest from its normal year to year, by 3.1°C; June the least
Records from 1991 to 2020: no month spans more than March, between −29.5°C (1992) and 26.0°C (2012).
Where Charlemagne’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at L'Assomption, the closest ECCC location with twelve months of temperature normals.
- Other locations: a location missing months of precipitation or snow is filled from the nearest that has them all, never mixed month by month.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- 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 Charlemagne’s climate
How warm does Charlemagne get in summer?
Of all twelve months, July has the warmest afternoons, about 26.6°C.
How cold does Charlemagne get in winter?
January nights average −16.0°C, the coldest of the year.
How much rain and snow does Charlemagne get?
Measured as water, a year brings 1,041 mm: 103 mm in October, the wettest month, and 66 mm in February, the driest.
Are these figures for Charlemagne itself?
No: Charlemagne has no normals location, so the figures come from L'Assomption, the nearest with 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Charlemagne →
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).