Saint-Jean-sur-Richelieu climate — normals and trends

Q: What is the climate of Saint-Jean-sur-Richelieu?

Saint-Jean-sur-Richelieu has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.9 °C and it receives 1,107 mm of precipitation per year.

Q: What is the hottest day ever recorded in Saint-Jean-sur-Richelieu?

The hottest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 27 May 2020, reaching 36.7 °C.

Q: What is the coldest day in Saint-Jean-sur-Richelieu?

The coldest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 15 January 1957, at -36.4 °C.

Q: Does it snow in Saint-Jean-sur-Richelieu?

Yes. Saint-Jean-sur-Richelieu gets on average 146.6 cm of snow per year and has around 145 frost days.

Q: Has the climate of Saint-Jean-sur-Richelieu warmed?

Yes: Saint-Jean-sur-Richelieu warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Saint-Jean-sur-Richelieu?

The wettest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 28 August 2011, with 107 mm of rain in 24 hours.

Q: What was the windiest day in Saint-Jean-sur-Richelieu?

The windiest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 25 February 1956, with winds reaching 48.8 km/h.

Q: What is the warmest month in Saint-Jean-sur-Richelieu?

The warmest month in Saint-Jean-sur-Richelieu is July (21.1 °C on average); the coldest is January (-8.9 °C).

Q: How much does it rain in Saint-Jean-sur-Richelieu?

Saint-Jean-sur-Richelieu receives on average 1,107 mm of precipitation per year, spread over about 145 rainy days.

Q: Is it sunny in Saint-Jean-sur-Richelieu?

Saint-Jean-sur-Richelieu gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

Saint-Jean-sur-Richelieu (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.9 °C and it receives 1,107 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 (21.1 °C on average) and the coldest is January (-8.9 °C). Rainfall peaks in August.

Saint-Jean-sur-Richelieu averages 145 frost days, 9 hot days (≥ 30 °C) and 145 rainy days per year.

Saint-Jean-sur-Richelieu has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.

The number of frost days there went from about 155 to 135 per year over the period.

The hottest day of the period reached 36.7 °C (on 27 May 2020) and the coldest -36.4 °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

Saint-Jean-sur-RichelieuQuebec

coords: 45.31°, -73.26°
period: 1940–2025 · 86 yrs

DfbWarm-summer humid continentalWarmest monthJulyColdest monthJanuaryWettest monthAugustDriest monthFebruary

Mean daily temperature

6.9°C

Average daily high

11.4°C

Average daily low

2.2°C

Annual rainfall

1,107mm

Sunshine / day

8.3h

Mean relative humidity

73%

Average peak wind

17.6km/h

Seasonal range

30.0°C

Frost days (< 0 °C)

145 d/yr

Hot days (≥ 30 °C)

9 d/yr

Rainy days (≥ 1 mm)

145 d/yr

Annual snowfall

146.6 cm

Average feels-like high

9.1 °C

Average feels-like low

-1.1 °C

Average peak gust

36.5 km/h

Tropical nights (≥ 20 °C)

8 d/yr

Solar radiation

13.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.36 · p = < 0.001

19402025

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

36.7 °C

27 May 2020

Coldest day

-36.4 °C

15 January 1957

Wettest day

107 mm

28 August 2011

Windiest day

48.8 km/h

25 February 1956

Strongest gust

112.0 km/h

27 January 1996

Hottest feels-like

40.8 °C

1 August 1975

Coldest feels-like

-42.0 °C

15 January 1957

Snowiest day

30.9 cm

27 December 1969

Sunniest day

15.4 h

25 June 2018

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.3 °C24 June 2025	-24.4 °C26 December 2025	7.5 °C	1,087 mm	18	146
2024	32.9 °C18 June 2024	-19.2 °C26 December 2024	9.2 °C	1,228 mm	10	122
2023	33.7 °C1 June 2023	-29.1 °C4 February 2023	8.7 °C	1,403 mm	9	129
2022	31.6 °C23 July 2022	-31.2 °C22 January 2022	7.7 °C	1,313 mm	12	131
2021	33.4 °C26 August 2021	-24.8 °C31 January 2021	8.5 °C	898 mm	19	133
2020	36.7 °C27 May 2020	-25.8 °C9 February 2020	8.4 °C	1,102 mm	21	138
2019	33.2 °C20 July 2019	-23.7 °C22 January 2019	6.6 °C	1,275 mm	8	149
2018	34.7 °C2 July 2018	-28.7 °C15 January 2018	7.6 °C	1,207 mm	18	153
2017	32.4 °C12 June 2017	-26.3 °C28 December 2017	7.7 °C	1,330 mm	8	126
2016	32.8 °C20 June 2016	-27.0 °C14 February 2016	8.1 °C	1,080 mm	10	135
2015	33.4 °C7 September 2015	-27.3 °C17 February 2015	7.3 °C	976 mm	10	132
2014	32.3 °C1 July 2014	-29.8 °C22 January 2014	7.1 °C	1,020 mm	7	137
2013	32.9 °C17 July 2013	-29.6 °C17 December 2013	7.3 °C	1,097 mm	6	143
2012	34.8 °C4 August 2012	-23.8 °C15 January 2012	8.6 °C	1,001 mm	18	132
2011	34.4 °C21 July 2011	-28.9 °C24 January 2011	8.0 °C	1,324 mm	13	132
2010	34.3 °C7 July 2010	-22.0 °C10 December 2010	8.4 °C	1,197 mm	12	129
2009	31.4 °C18 August 2009	-29.9 °C16 January 2009	6.8 °C	1,086 mm	4	143
2008	31.4 °C8 June 2008	-27.8 °C29 February 2008	7.2 °C	1,220 mm	4	144
2007	32.3 °C2 August 2007	-25.8 °C9 March 2007	6.8 °C	1,161 mm	8	140
2006	33.6 °C1 August 2006	-19.8 °C29 December 2006	8.3 °C	1,301 mm	6	124
2005	32.8 °C25 June 2005	-25.5 °C22 January 2005	7.5 °C	1,213 mm	13	138
2004	31.5 °C22 July 2004	-31.4 °C15 January 2004	6.4 °C	944 mm	1	149
2003	33.8 °C26 June 2003	-29.9 °C15 February 2003	6.5 °C	1,112 mm	5	150
2002	33.8 °C14 August 2002	-22.2 °C9 December 2002	7.8 °C	1,041 mm	16	151
2001	36.6 °C9 August 2001	-24.3 °C21 January 2001	8.1 °C	834 mm	22	146
2000	29.8 °C16 June 2000	-27.8 °C18 January 2000	6.6 °C	1,155 mm	0	128
1999	33.7 °C27 June 1999	-31.0 °C14 January 1999	8.4 °C	973 mm	23	133
1998	31.1 °C15 July 1998	-27.9 °C1 January 1998	8.5 °C	1,085 mm	5	122
1997	32.1 °C10 August 1997	-30.3 °C19 January 1997	6.2 °C	1,063 mm	6	158
1996	30.6 °C7 August 1996	-29.0 °C7 January 1996	6.8 °C	1,287 mm	1	139
1995	34.7 °C14 July 1995	-29.9 °C11 January 1995	7.1 °C	1,175 mm	14	144
1994	32.9 °C18 June 1994	-36.4 °C27 January 1994	6.4 °C	1,130 mm	4	140
1993	34.1 °C6 July 1993	-36.3 °C7 February 1993	6.2 °C	1,178 mm	6	147
1992	31.1 °C23 May 1992	-26.4 °C16 January 1992	6.1 °C	1,000 mm	3	143
1991	34.2 °C20 July 1991	-26.2 °C22 January 1991	7.7 °C	994 mm	12	135
1990	30.8 °C27 April 1990	-23.9 °C18 February 1990	8.0 °C	1,295 mm	7	142
1989	33.1 °C25 July 1989	-30.9 °C30 December 1989	6.2 °C	994 mm	11	150
1988	35.4 °C4 August 1988	-27.7 °C6 February 1988	7.4 °C	879 mm	25	137
1987	33.8 °C17 August 1987	-28.6 °C27 January 1987	7.2 °C	1,045 mm	11	143
1986	32.4 °C25 July 1986	-26.1 °C7 February 1986	6.9 °C	1,189 mm	2	144
1985	33.3 °C25 July 1985	-28.0 °C19 December 1985	6.7 °C	973 mm	11	149
1984	32.3 °C8 June 1984	-27.7 °C12 January 1984	7.1 °C	977 mm	6	141
1983	32.8 °C15 June 1983	-29.0 °C20 December 1983	7.5 °C	1,310 mm	17	136
1982	34.3 °C17 July 1982	-31.9 °C18 January 1982	6.7 °C	971 mm	9	138
1981	33.5 °C8 July 1981	-34.0 °C4 January 1981	7.2 °C	1,187 mm	5	143
1980	33.0 °C25 June 1980	-30.6 °C25 December 1980	6.1 °C	1,040 mm	2	156
1979	32.9 °C25 July 1979	-30.0 °C12 February 1979	7.3 °C	1,024 mm	9	138
1978	34.4 °C28 May 1978	-28.8 °C5 February 1978	5.9 °C	1,007 mm	12	165
1977	35.8 °C20 July 1977	-27.0 °C12 December 1977	7.1 °C	1,202 mm	13	143
1976	31.7 °C6 July 1976	-31.5 °C24 January 1976	5.9 °C	1,356 mm	7	157
1975	35.1 °C1 August 1975	-27.7 °C19 December 1975	7.2 °C	1,186 mm	19	156
1974	30.0 °C10 June 1974	-31.1 °C18 January 1974	6.1 °C	1,283 mm	1	165
1973	32.6 °C8 July 1973	-28.9 °C31 January 1973	7.6 °C	1,339 mm	7	125
1972	32.2 °C12 July 1972	-32.2 °C23 February 1972	5.5 °C	1,267 mm	5	169
1971	33.3 °C30 June 1971	-32.7 °C3 February 1971	6.3 °C	1,027 mm	6	153
1970	32.2 °C30 July 1970	-29.7 °C20 January 1970	6.1 °C	994 mm	9	155
1969	32.0 °C27 June 1969	-27.5 °C25 December 1969	6.5 °C	1,083 mm	6	159
1968	33.2 °C18 July 1968	-32.1 °C9 January 1968	6.0 °C	959 mm	8	149
1967	31.1 °C4 June 1967	-35.5 °C13 February 1967	6.1 °C	1,030 mm	3	165
1966	33.8 °C3 July 1966	-28.4 °C20 February 1966	6.7 °C	906 mm	10	152
1965	33.0 °C28 June 1965	-32.7 °C15 January 1965	6.0 °C	867 mm	8	166
1964	32.7 °C28 July 1964	-25.0 °C10 February 1964	6.7 °C	857 mm	10	153
1963	34.8 °C2 July 1963	-29.8 °C4 February 1963	5.7 °C	1,050 mm	14	152
1962	31.6 °C8 July 1962	-33.4 °C2 February 1962	5.7 °C	1,104 mm	2	165
1961	30.1 °C11 September 1961	-28.0 °C22 January 1961	6.5 °C	1,123 mm	1	155
1960	32.6 °C29 August 1960	-29.2 °C10 January 1960	6.8 °C	983 mm	6	148
1959	33.5 °C30 July 1959	-28.7 °C9 February 1959	6.8 °C	1,164 mm	16	156
1958	29.7 °C3 August 1958	-27.4 °C11 December 1958	5.9 °C	1,147 mm	0	146
1957	32.1 °C23 June 1957	-36.4 °C15 January 1957	7.1 °C	1,106 mm	6	140
1956	32.7 °C14 June 1956	-26.9 °C2 January 1956	6.0 °C	1,018 mm	5	163
1955	34.8 °C9 July 1955	-30.6 °C2 February 1955	6.8 °C	927 mm	24	149
1954	30.7 °C25 August 1954	-29.2 °C13 February 1954	6.2 °C	1,433 mm	2	150
1953	33.5 °C17 July 1953	-23.1 °C1 January 1953	8.1 °C	987 mm	10	119
1952	33.1 °C15 July 1952	-28.0 °C30 January 1952	7.2 °C	1,103 mm	8	147
1951	29.7 °C8 July 1951	-32.2 °C10 February 1951	6.6 °C	1,173 mm	0	140
1950	31.8 °C10 July 1950	-29.7 °C4 March 1950	6.3 °C	1,129 mm	4	155
1949	34.0 °C27 July 1949	-26.2 °C6 February 1949	7.7 °C	1,026 mm	21	140
1948	33.3 °C27 August 1948	-33.0 °C10 February 1948	6.6 °C	938 mm	10	142
1947	33.0 °C14 August 1947	-26.2 °C1 January 1947	6.6 °C	1,229 mm	10	164
1946	33.4 °C29 June 1946	-30.8 °C20 January 1946	7.1 °C	1,089 mm	7	133
1945	30.4 °C7 September 1945	-26.2 °C7 January 1945	6.6 °C	1,330 mm	2	134
1944	33.4 °C16 August 1944	-25.4 °C30 December 1944	6.3 °C	964 mm	11	165
1943	30.1 °C11 July 1943	-27.4 °C22 January 1943	5.7 °C	1,141 mm	1	158
1942	31.1 °C22 August 1942	-31.2 °C8 January 1942	6.2 °C	1,174 mm	3	148
1941	31.9 °C1 July 1941	-27.4 °C21 December 1941	5.6 °C	999 mm	5	156
1940	28.9 °C23 July 1940	-25.1 °C9 January 1940	5.7 °C	1,159 mm	0	162

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

12.2 °C

+0.8 °C

Hot days (≥ 30 °C)

18 d/yr

Frost days (< 0 °C)

146 d/yr

Annual rainfall

1087 mm

-21 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	-4.9 °C	-0.1 °C	48 mm	-21 mm
Feb	-4.1 °C	-0.9 °C	82 mm	+17 mm
Mar	5.5 °C	+2.8 °C	91 mm	+15 mm
Apr	12.2 °C	+1.2 °C	104 mm	+9 mm
May	18.5 °C	-0.2 °C	129 mm	+30 mm
Jun	25.0 °C	+1.4 °C	85 mm	-24 mm
Jul	27.4 °C	+1.5 °C	80 mm	-28 mm
Aug	26.2 °C	+1.6 °C	51 mm	-58 mm
Sep	22.5 °C	+2.3 °C	59 mm	-41 mm
Oct	15.8 °C	+2.5 °C	162 mm	+60 mm
Nov	3.9 °C	-1.9 °C	114 mm	+21 mm
Dec	-2.7 °C	-1.1 °C	83 mm	-2 mm

The year's extremes

Hottest day

35.3 °C

24 Jun 2025

Coldest day

-24.4 °C

26 Dec 2025

Wettest day

41.7 mm

31 Oct 2025

Windiest day

41.6 km/h

19 Dec 2025

Strongest gust

89.3 km/h

19 Dec 2025

Hottest feels-like

39.3 °C

23 Jun 2025

Coldest feels-like

-29.8 °C

26 Dec 2025

Snowiest day

18.4 cm

16 Feb 2025

Sunniest day

15.3 h

25 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Saint-Jean-sur-Richelieu?

Saint-Jean-sur-Richelieu has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.9 °C and it receives 1,107 mm of precipitation per year.

What is the hottest day ever recorded in Saint-Jean-sur-Richelieu?

The hottest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 27 May 2020, reaching 36.7 °C.

What is the coldest day in Saint-Jean-sur-Richelieu?

The coldest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 15 January 1957, at -36.4 °C.

Does it snow in Saint-Jean-sur-Richelieu?

Yes. Saint-Jean-sur-Richelieu gets on average 146.6 cm of snow per year and has around 145 frost days.

Has the climate of Saint-Jean-sur-Richelieu warmed?

Yes: Saint-Jean-sur-Richelieu warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Saint-Jean-sur-Richelieu?

The wettest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 28 August 2011, with 107 mm of rain in 24 hours.

What was the windiest day in Saint-Jean-sur-Richelieu?

The windiest day measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 25 February 1956, with winds reaching 48.8 km/h.

What is the warmest month in Saint-Jean-sur-Richelieu?

The warmest month in Saint-Jean-sur-Richelieu is July (21.1 °C on average); the coldest is January (-8.9 °C).

How much does it rain in Saint-Jean-sur-Richelieu?

Saint-Jean-sur-Richelieu receives on average 1,107 mm of precipitation per year, spread over about 145 rainy days.

Is it sunny in Saint-Jean-sur-Richelieu?

Saint-Jean-sur-Richelieu gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

What is the biggest single-day snowfall in Saint-Jean-sur-Richelieu?

The heaviest 24-hour snowfall measured in Saint-Jean-sur-Richelieu between 1940 and 2025 was 27 December 1969, with 30.9 cm.

Are there tropical nights in Saint-Jean-sur-Richelieu?

Yes: Saint-Jean-sur-Richelieu has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Saint-Jean-sur-Richelieu?

In Saint-Jean-sur-Richelieu, between 1940 and 2025, the highest apparent temperature reached 40.8 °C on 1 August 1975, and the lowest was -42.0 °C on 15 January 1957.

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