Photo: Fralambert · CC BY-SA 4.0Sainte-Julienne has colder winter nights than 75% of Canadian towns
Peak summer warmth arrives in July, with afternoons near 26.6°C. It is a wet place: more rain and snow fall here than on 74% of Canadian towns. A year here swings 43°C from midwinter lows to midsummer highs. The furnace earns its keep from October to April, the months that average under 10°C.
These are not Sainte-Julienne’s own readings: ECCC keeps no normals there, so the page uses L'Assomption, 27 km south-east.
A year in Sainte-Julienne at a glance
Each month’s typical high and low, in °C.
What stands out about Sainte-Julienne’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Sainte-Julienne feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
161 frost days and 119 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 24 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
1,041 mm of precipitation in a typical year
October brings the most rain and snow; February, the least. On about 122 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
ECCC’s L'Assomption normals leave out precipitation and snow; both come from Montréal Trudeau (Airport) here, 55 km away.
217 cm of snow in a typical year
From October to April snow is likely; January is the peak, at about 52 cm.
Snowfall by month
Centimetres
Heating a home in Sainte-Julienne
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Warm days count for nothing; each colder day adds how far its mean sits below 18°C.
Living with Sainte-Julienne’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
For long days outdoors, Jun, Jul, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →About 44 days a year bring a wind chill under −20, when bare skin chills fast.
About 49 days a year feel above 30 on the humidex.
Bad-weather days, from blizzards to floods, get their own page for Sainte-Julienne: the hazards page.
Flood & hazards →ECCC’s normals location: L'Assomption
The page’s figures are ECCC’s 1991–2020 normals for L'Assomption, one of its 450 normals locations.
| Distance from the town | 27 km south-east |
| Station altitude | 21 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Precipitation from | Montréal Trudeau (Airport), 55 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), 55 km |
How Sainte-Julienne compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Quebec.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Sainte-Julienne’s would only repeat its figures. The nearest places to Sainte-Julienne with figures are 24–29 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Sainte-Julienne L'Assomption | 26.6°C | −16.0°C | 1,041 mm |
| Sainte-Sophie 24 km · Lachute | 26.5°C about the same | −14.7°C 1.3°C milder | 1,178 mm |
| Entrelacs 28 km · St-Jovite | 25.3°C 1.3°C cooler | −18.3°C 2.3°C colder | 1,178 mm |
Sainte-Julienne 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 | −5.9°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 |
March: −29.5°C at its coldest, 26.0°C at its warmest
The month to count on least is January: one year in three its average strays more than 3.1°C from −10.9°C. June moves least, typically by 1.0°C.
Where Sainte-Julienne’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for L'Assomption, its nearest location with complete temperatures.
- 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: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- Not on this page: sunshine, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Sainte-Julienne’s climate
How warm does Sainte-Julienne get in summer?
A normal July afternoon tops out at about 26.6°C, the year’s high point.
How cold does Sainte-Julienne get in winter?
Deep winter means January, when nights average −16.0°C.
How much rain and snow does Sainte-Julienne get?
The year adds up to 1,041 mm. October is the peak month (103 mm) and February the low one (66 mm).
Are these figures for Sainte-Julienne itself?
They are the closest available: the normals for L'Assomption, since Sainte-Julienne has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Sainte-Julienne →
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).