Photo: Tango7174 · CC BY-SA 4.0Wet weather: 1,109 mm of rain and snow a year falls on Saint-Charles-sur-Richelieu, more than on 82% of Canadian towns
Sunny July days climb to about 26.0°C. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 41°C apart. Its January nights bite harder than in 71% of Canadian towns. Picnics, hikes and garden evenings come into their own from June to September, with highs of 21–26°C.
No ECCC station in Saint-Charles-sur-Richelieu has 1991–2020 normals; the page reads Fleury, 23 km north-east, instead.
A year in Saint-Charles-sur-Richelieu at a glance
Each month’s typical high and low, in °C.
What stands out about Saint-Charles-sur-Richelieu’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Saint-Charles-sur-Richelieu feels like
Each season’s and each month’s usual high and low, 1991–2020.
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
Rain and melted snow: about 1,109 mm a year
August brings the most rain and snow; February, the least. Some 145 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
202 cm of snow in a typical year
From October to April snow is likely; December is the peak, at about 49 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Saint-Charles-sur-Richelieu
92% 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 Saint-Charles-sur-Richelieu’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The growing season between frosts lasts about 136 days, roughly 12 May to 27 September.
For long days outdoors, Jun, Jul, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →Bad-weather days, from blizzards to floods, get their own page for Saint-Charles-sur-Richelieu: the hazards page.
Flood & hazards →ECCC’s normals location: Fleury
Fleury is one of the 450 places where ECCC publishes 1991–2020 normals.
| Distance from the town | 23 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, 27 km |
How Saint-Charles-sur-Richelieu 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
Places around Saint-Charles-sur-Richelieu whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Saint-Charles-sur-Richelieu Fleury | 26.0°C | −14.8°C | 1,109 mm |
| Saint-Marc-sur-Richelieu 4.6 km · Fleury | 26.0°C about the same | −14.8°C about the same | 1,109 mm |
| Saint-Mathieu-de-Beloeil 6.9 km · L'Assomption | 26.6°C 0.6°C warmer | −16.0°C 1.2°C colder | 1,109 mm |
Saint-Charles-sur-Richelieu 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 |
March has run from −31.0°C to 25.5°C in thirty years
Year to year, January varies most (a standard deviation of 3.1°C around −10.5°C) and August least (0.9°C).
Where Saint-Charles-sur-Richelieu’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Fleury from ECCC’s climate data site, the nearest location with every month of temperature.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest 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 Saint-Charles-sur-Richelieu’s climate
How warm does Saint-Charles-sur-Richelieu get in summer?
The warmest month is July, when afternoons average 26.0°C.
How cold does Saint-Charles-sur-Richelieu get in winter?
At its coldest, in January, the normal low is −14.8°C.
How much rain and snow does Saint-Charles-sur-Richelieu get?
Around 1,109 mm a year in all, from 114 mm in August down to 61 mm in February.
How long does snow stay on the ground?
Snow lies on the ground for about 106 days in a normal year.
Are these figures for Saint-Charles-sur-Richelieu itself?
The figures are ECCC’s for Fleury; Saint-Charles-sur-Richelieu has no normals station.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Saint-Charles-sur-Richelieu →
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).