Photo: busand2003 · CC BY 3.0For weather, L'Islet is about as ordinary as Canadian towns get
July afternoons reach 25.0°C on a typical day and January nights drop to −14.8°C; 906 mm of rain and melted snow falls in a year. A year here swings 40°C from midwinter lows to midsummer highs. In January, nights here are colder than in 71% of Canadian towns. Expect about 165 frosty starts a year, days when the air falls to freezing.
Borrowed figures: L'Islet has no normals station, so these come from Cap-Tourmente, 32 km west.
A year in L'Islet at a glance
Each month’s typical high and low, in °C.
What stands out about L'Islet’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in L'Islet feels like
Each season’s and each month’s usual high and low, 1991–2020.
165 frost days and 99 days above 20°C a year
The frost season runs October to May, and January freezes nearly 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
906 mm of precipitation in a typical year
October is the wettest month and February the driest. Some 129 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
ECCC’s Cap-Tourmente normals leave precipitation out; the figures here come from La Pocatière, 37 km away.
349 cm of snow in a typical year
From October to May snow is likely; December is the peak, at about 83 cm. 9th snowiest of 493 towns of 2,500+ in Quebec.
Snowfall by month
Centimetres
ECCC’s Cap-Tourmente normals leave snowfall out; the figures here come from Ste Lucie, 50 km away.
Heating a home in L'Islet
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Think of it as a year’s worth of daily shortfalls below 18°C, added up.
Living with L'Islet’s climate
What the normals mean for a garden, a day outside and the depth of winter.
About 151 days a year pass without frost, from an average last frost of 8 May to a first of 7 October.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul, Aug and Sep.
Parks & trails →Expect around 40 days a year when the wind chill sinks below −20.
Muggy heat with a humidex over 30 arrives on about 35 days a year.
What averages leave out, the floods and ice storms, is on L'Islet’s hazards page.
Flood & hazards →ECCC’s normals location: Cap-Tourmente
The page’s figures are ECCC’s 1991–2020 normals for Cap-Tourmente, one of its 450 normals locations.
| Distance from the town | 32 km west |
| Station altitude | 6 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Precipitation from | La Pocatière, 37 km |
| Snowfall from | Ste Lucie, 50 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 | La Pocatière, 37 km |
How L'Islet compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Quebec.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share L'Islet’s would only repeat its figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| L'Islet Cap-Tourmente | 25.0°C | −14.8°C | 906 mm |
| Cap-Saint-Ignace 12 km · Cap-Tourmente | 25.0°C about the same | −14.8°C about the same | 906 mm |
| Saint-Jean-Port-Joli 14 km · La Pocatière | 24.2°C 0.8°C cooler | −15.3°C 0.5°C colder | 906 mm |
L'Islet 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 | −5.4°C | −14.8°C | −10.1°C | 70 mm | 62 cm |
| February | −3.7°C | −13.9°C | −8.8°C | 61 mm | 71 cm |
| March | 1.3°C | −8.1°C | −3.4°C | 62 mm | 61 cm |
| April | 8.8°C | −0.9°C | 4.0°C | 69 mm | 27 cm |
| May | 16.9°C | 5.7°C | 11.3°C | 74 mm | 2 cm |
| June | 22.1°C | 10.9°C | 16.5°C | 85 mm | 0 cm |
| July | 25.0°C | 14.0°C | 19.5°C | 81 mm | 0 cm |
| August | 24.2°C | 13.3°C | 18.8°C | 82 mm | 0 cm |
| September | 19.5°C | 9.2°C | 14.4°C | 78 mm | under 1 cm |
| October | 12.2°C | 3.1°C | 7.7°C | 99 mm | 11 cm |
| November | 4.9°C | −2.6°C | 1.2°C | 72 mm | 30 cm |
| December | −2.0°C | −10.2°C | −6.1°C | 74 mm | 83 cm |
| Year | 10.3°C | 0.5°C | 5.4°C | 906 mm | 349 cm |
In March, anything from −29.0°C to 20.2°C
Bars run from each month’s record low to its record high over 1991–2020; January is the month whose average wanders most from year to year (±2.6°C around −10.1°C), July the one that wanders least (±0.9°C).
Where L'Islet’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Cap-Tourmente, 1991–2020.
- Other locations: ECCC blanks a month that fails its completeness rule, so the precipitation or snowfall here comes from the next location with all twelve months.
- 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, 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 L'Islet’s climate
How warm does L'Islet get in summer?
The year’s warmest days come in July, with highs averaging 25.0°C.
How cold does L'Islet get in winter?
Of all twelve months, January has the coldest nights, about −14.8°C.
How much rain and snow does L'Islet get?
906 mm a year counting snow as water. The wettest month is October (99 mm); the driest, February (61 mm).
Are these figures for L'Islet itself?
No, they come from Cap-Tourmente; ECCC keeps no 1991–2020 normals in L'Islet itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for L'Islet →
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).