Joliette is wetter than 82% of Canadian towns: 1,109 mm of rain and snow a year
On a normal January night the air cools to about −16.0°C. In January, nights here are colder than in 75% of Canadian towns. The gap between a January night and a July afternoon is 43°C. Garden chairs stay out from June to September, the months with highs of 21–27°C.
No ECCC station in Joliette has 1991–2020 normals; the page reads L'Assomption, 23 km south, instead.
A year in Joliette at a glance
Each month’s typical high and low, in °C.
What stands out about Joliette’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Joliette 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. 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
About 1,109 mm of rain and snow a year
August brings the most rain and snow; February, the least. On about 145 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 Fleury here, 42 km away.
Snowfall: about 202 cm in a normal year
Expect snow from October to April, with about 49 cm in December, the snowiest month.
Snowfall by month
Centimetres
Heating a home in Joliette
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 Joliette’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
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 44 days a year when the wind chill sinks below −20.
About 49 days a year feel above 30 on the humidex.
For the weather that does damage, from ice storms to floods, see Joliette’s hazards page.
Flood & hazards →ECCC’s normals location: L'Assomption
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for L'Assomption.
| Distance from the town | 23 km south |
| Station altitude | 21 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Precipitation from | Fleury, 42 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 | Fleury, 42 km |
How Joliette 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
Places around Joliette whose figures come from another normals location. No closer place has figures: this one lies 21 km from Joliette.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Joliette L'Assomption | 26.6°C | −16.0°C | 1,109 mm |
| Berthierville 21 km · Fleury | 26.0°C 0.6°C cooler | −14.8°C 1.2°C milder | 1,109 mm |
Joliette 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 | 81 mm | 45 cm |
| February | −4.0°C | −14.8°C | −9.4°C | 61 mm | 43 cm |
| March | 1.8°C | −8.3°C | −3.2°C | 71 mm | 38 cm |
| April | 10.8°C | 0.1°C | 5.5°C | 96 mm | 13 cm |
| May | 19.2°C | 7.2°C | 13.2°C | 98 mm | under 1 cm |
| June | 24.3°C | 12.4°C | 18.4°C | 102 mm | 0 cm |
| July | 26.6°C | 14.8°C | 20.7°C | 106 mm | 0 cm |
| August | 25.5°C | 13.7°C | 19.6°C | 114 mm | 0 cm |
| September | 21.1°C | 9.2°C | 15.2°C | 97 mm | 0 cm |
| October | 13.0°C | 3.2°C | 8.1°C | 108 mm | 2 cm |
| November | 5.4°C | −2.7°C | 1.3°C | 90 mm | 12 cm |
| December | −1.9°C | −10.2°C | −6.1°C | 85 mm | 49 cm |
| Year | 11.3°C | 0.7°C | 6.0°C | 1,109 mm | 202 cm |
March has run from −29.5°C to 26.0°C in thirty years
From one year to the next, January’s average typically shifts by 3.1°C around its normal of −10.9°C, the widest of any month, while June’s shifts by 1.0°C.
Where Joliette’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for L'Assomption, the nearest location with a full year of 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: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- 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 Joliette’s climate
How warm does Joliette get in summer?
Highs reach 26.6°C on an average July day; no month is warmer.
How cold does Joliette get in winter?
Expect nights around −16.0°C in January; no month is colder.
How much rain and snow does Joliette get?
Around 1,109 mm a year in all, from 114 mm in August down to 61 mm in February.
Are these figures for Joliette itself?
They are borrowed from L'Assomption, the nearest place to Joliette where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Joliette →
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).