Joliette climate — normals and trends
Joliette (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.8 °C and it receives 994 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (20.6 °C on average) and the coldest is January (-10.8 °C). Rainfall peaks in April.
Joliette averages 161 frost days, 9 hot days (≥ 30 °C) and 129 rainy days per year.
Joliette has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 168 to 154 per year over the period.
The hottest day of the period reached 37.6 °C (on 1 August 1975) and the coldest -38.1 °C (on 15 January 1957).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
JolietteQuebec
- coords
- 46.02°, -73.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.8°C
Average daily high
10.7°C
Average daily low
0.5°C
Annual rainfall
994mm
Sunshine / day
8.4h
Mean relative humidity
70%
Average peak wind
16.3km/h
Seasonal range
31.4°C
Frost days (< 0 °C)
161 d/yr
Hot days (≥ 30 °C)
9 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
172.8 cm
Average feels-like high
8.2 °C
Average feels-like low
-2.8 °C
Average peak gust
35.1 km/h
Tropical nights (≥ 20 °C)
5 d/yr
Solar radiation
13.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.27 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
37.6 °C
1 August 1975
Coldest day
-38.1 °C
15 January 1957
Wettest day
94 mm
9 August 2024
Windiest day
45.2 km/h
1 November 2019
Strongest gust
100.4 km/h
27 September 1942
Hottest feels-like
43.1 °C
1 August 1975
Coldest feels-like
-43.9 °C
15 January 1957
Snowiest day
34.0 cm
30 November 1944
Sunniest day
15.6 h
20 June 1952
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -5.7 °C | +0.5 °C | 39 mm | -30 mm |
| Feb | -5.3 °C | -1.2 °C | 81 mm | +17 mm |
| Mar | 4.1 °C | +2.1 °C | 86 mm | +12 mm |
| Apr | 11.1 °C | +0.7 °C | 104 mm | +15 mm |
| May | 18.7 °C | +0.2 °C | 116 mm | +31 mm |
| Jun | 24.8 °C | +1.3 °C | 90 mm | +3 mm |
| Jul | 27.1 °C | +1.1 °C | 83 mm | -4 mm |
| Aug | 26.1 °C | +1.5 °C | 47 mm | -39 mm |
| Sep | 22.0 °C | +2.2 °C | 58 mm | -32 mm |
| Oct | 15.4 °C | +2.7 °C | 127 mm | +38 mm |
| Nov | 2.8 °C | -1.8 °C | 107 mm | +19 mm |
| Dec | -4.6 °C | -1.4 °C | 70 mm | -14 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Joliette?
Joliette has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.8 °C and it receives 994 mm of precipitation per year.
What is the hottest day ever recorded in Joliette?
The hottest day measured in Joliette between 1940 and 2025 was 1 August 1975, reaching 37.6 °C.
What is the coldest day in Joliette?
The coldest day measured in Joliette between 1940 and 2025 was 15 January 1957, at -38.1 °C.
Does it snow in Joliette?
Yes. Joliette gets on average 172.8 cm of snow per year and has around 161 frost days.
Has the climate of Joliette warmed?
Yes: Joliette warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Joliette?
The wettest day measured in Joliette between 1940 and 2025 was 9 August 2024, with 94 mm of rain in 24 hours.
What was the windiest day in Joliette?
The windiest day measured in Joliette between 1940 and 2025 was 1 November 2019, with winds reaching 45.2 km/h.
What is the warmest month in Joliette?
The warmest month in Joliette is July (20.6 °C on average); the coldest is January (-10.8 °C).
How much does it rain in Joliette?
Joliette receives on average 994 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Joliette?
Joliette gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Joliette?
The heaviest 24-hour snowfall measured in Joliette between 1940 and 2025 was 30 November 1944, with 34.0 cm.
Are there tropical nights in Joliette?
Yes: Joliette has on average 5 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Joliette?
In Joliette, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 1 August 1975, and the lowest was -43.9 °C on 15 January 1957.
Compare Joliette with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Joliette