More rain and snow fall on Saint-Casimir than on 84% of Canadian towns: 1,138 mm a year
Deep winter brings January lows near −16.9°C. Rain or snow is most frequent in July and least in February. Winter nights are cold: in January they are colder than in 81% of Canadian towns. Long walks are most pleasant from June to September, when afternoons reach 20–26°C.
These are not Saint-Casimir’s own readings: ECCC keeps no normals there, so the page uses Fortierville, 22 km south.
A year in Saint-Casimir at a glance
Each month’s typical high and low, in °C.
What stands out about Saint-Casimir’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Saint-Casimir feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 175 days, 20°C on 107
Frost comes from September to May; in January almost every night freezes. On about 29 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 1,138 mm a year
About 141 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 253 cm of snow a year
The snow season runs October to April; December brings the most, about 59 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Saint-Casimir
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The total grows by a degree for every degree a day’s mean sits under 18°C. Homes here need more heating than 61% of Canadian towns.
Living with Saint-Casimir’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Plan time outside for Jun, Jul, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →Ice storms, floods and heat waves are risks, not averages: they are on Saint-Casimir’s hazards page.
Flood & hazards →ECCC’s normals location: Fortierville
The page’s figures are ECCC’s 1991–2020 normals for Fortierville, one of its 450 normals locations.
| Distance from the town | 22 km south |
| Station altitude | 53 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −41.0°C |
| Hottest reading, 1991–2020 | 35.9°C |
| Next-nearest location | Trois-Rivières, 46 km |
How Saint-Casimir 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-Casimir whose figures come from another normals location. No closer places have figures: these lie 21–30 km from Saint-Casimir.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Saint-Casimir Fortierville | 25.5°C | −16.9°C | 1,138 mm |
| Saint-Stanislas 21 km · Trois-Rivières | 25.1°C about the same | −14.1°C 2.8°C milder | 1,101 mm |
| Saint-Basile 27 km · Québec Jean Lesage (Airport) | 25.0°C 0.5°C cooler | −16.7°C about the same | 1,173 mm |
Saint-Casimir 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 | −6.9°C | −16.9°C | −12.0°C | 81 mm | 56 cm |
| February | −4.9°C | −15.9°C | −10.5°C | 69 mm | 55 cm |
| March | 1.2°C | −9.0°C | −4.0°C | 79 mm | 47 cm |
| April | 9.5°C | −1.0°C | 4.4°C | 94 mm | 15 cm |
| May | 18.4°C | 5.8°C | 12.1°C | 92 mm | 1 cm |
| June | 23.3°C | 11.1°C | 17.2°C | 108 mm | 0 cm |
| July | 25.5°C | 14.0°C | 19.6°C | 133 mm | 0 cm |
| August | 24.5°C | 12.9°C | 18.6°C | 103 mm | 0 cm |
| September | 20.0°C | 8.3°C | 14.2°C | 95 mm | 0 cm |
| October | 12.1°C | 2.5°C | 7.4°C | 105 mm | 3 cm |
| November | 4.6°C | −3.2°C | 0.9°C | 82 mm | 19 cm |
| December | −2.9°C | −10.9°C | −6.9°C | 100 mm | 59 cm |
| Year | 10.4°C | −0.2°C | 5.1°C | 1,138 mm | 253 cm |
From −32.0°C to 23.5°C: March’s coldest and warmest days since 1991
From one year to the next, January’s average typically shifts by 3.2°C around its normal of −12.0°C, the widest of any month, while June’s shifts by 1.0°C.
Where Saint-Casimir’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Fortierville, the closest ECCC location with twelve months of temperature normals.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- 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 Saint-Casimir’s climate
How warm does Saint-Casimir get in summer?
Of all twelve months, July has the warmest afternoons, about 25.5°C.
How cold does Saint-Casimir get in winter?
Winter bottoms out in January, with lows near −16.9°C.
How much rain and snow does Saint-Casimir get?
The year adds up to 1,138 mm. July is the peak month (133 mm) and February the low one (69 mm).
How long does snow stay on the ground?
A layer of at least 1 cm stays down on about 134 days a year.
Are these figures for Saint-Casimir itself?
They are the closest available: the normals for Fortierville, since Saint-Casimir has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Saint-Casimir →
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).