L'Assomption climate — normals and trends

Q: What is the climate of L'Assomption?

L'Assomption has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.3 °C and it receives 1,036 mm of precipitation per year.

Q: What is the hottest day ever recorded in L'Assomption?

The hottest day measured in L'Assomption between 1940 and 2025 was 1 August 1975, reaching 36.9 °C.

Q: What is the coldest day in L'Assomption?

The coldest day measured in L'Assomption between 1940 and 2025 was 15 January 1957, at -37.7 °C.

Q: Does it snow in L'Assomption?

Yes. L'Assomption gets on average 159.2 cm of snow per year and has around 152 frost days.

Q: Has the climate of L'Assomption warmed?

Yes: L'Assomption warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in L'Assomption?

The wettest day measured in L'Assomption between 1940 and 2025 was 9 August 2024, with 105 mm of rain in 24 hours.

Q: What was the windiest day in L'Assomption?

The windiest day measured in L'Assomption between 1940 and 2025 was 25 February 1956, with winds reaching 52.3 km/h.

Q: What is the warmest month in L'Assomption?

The warmest month in L'Assomption is July (21.1 °C on average); the coldest is January (-10.2 °C).

Q: How much does it rain in L'Assomption?

L'Assomption receives on average 1,036 mm of precipitation per year, spread over about 133 rainy days.

Q: Is it sunny in L'Assomption?

L'Assomption gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.

L'Assomption (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.3 °C and it receives 1,036 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 (-10.2 °C). Rainfall peaks in July.

L'Assomption averages 152 frost days, 9 hot days (≥ 30 °C) and 133 rainy days per year.

L'Assomption has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.

The number of frost days there went from about 160 to 144 per year over the period.

The hottest day of the period reached 36.9 °C (on 1 August 1975) and the coldest -37.7 °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

L'AssomptionQuebec

coords: 45.82°, -73.43°
period: 1940–2025 · 86 yrs

DfbWarm-summer humid continentalWarmest monthJulyColdest monthJanuaryWettest monthJulyDriest monthFebruary

Mean daily temperature

6.3°C

Average daily high

11.0°C

Average daily low

1.5°C

Annual rainfall

1,036mm

Sunshine / day

8.5h

Mean relative humidity

71%

Average peak wind

17.6km/h

Seasonal range

31.3°C

Frost days (< 0 °C)

152 d/yr

Hot days (≥ 30 °C)

9 d/yr

Rainy days (≥ 1 mm)

133 d/yr

Annual snowfall

159.2 cm

Average feels-like high

8.5 °C

Average feels-like low

-1.8 °C

Average peak gust

36.0 km/h

Tropical nights (≥ 20 °C)

7 d/yr

Solar radiation

13.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.6 °C

since 1940

+0.2 °C per decade · r² = 0.31 · 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

36.9 °C

1 August 1975

Coldest day

-37.7 °C

15 January 1957

Wettest day

105 mm

9 August 2024

Windiest day

52.3 km/h

25 February 1956

Strongest gust

109.1 km/h

27 January 1996

Hottest feels-like

42.1 °C

1 August 1975

Coldest feels-like

-43.6 °C

15 January 1957

Snowiest day

33.0 cm

30 November 1944

Sunniest day

15.5 h

22 June 2023

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.2 °C24 June 2025	-27.5 °C9 December 2025	6.9 °C	1,026 mm	16	151
2024	33.5 °C19 June 2024	-21.6 °C15 December 2024	8.7 °C	1,198 mm	11	134
2023	33.5 °C1 June 2023	-30.2 °C4 February 2023	8.2 °C	1,407 mm	9	143
2022	31.9 °C6 August 2022	-32.9 °C22 January 2022	7.1 °C	1,182 mm	12	136
2021	32.7 °C7 June 2021	-24.2 °C31 January 2021	8.1 °C	864 mm	17	136
2020	35.0 °C27 May 2020	-26.6 °C14 February 2020	7.6 °C	1,124 mm	22	157
2019	32.6 °C4 July 2019	-26.2 °C17 January 2019	6.0 °C	1,217 mm	10	155
2018	34.8 °C2 July 2018	-30.2 °C2 January 2018	6.8 °C	1,085 mm	16	164
2017	31.8 °C11 June 2017	-26.5 °C28 December 2017	7.1 °C	1,323 mm	7	137
2016	32.2 °C13 July 2016	-29.4 °C14 February 2016	7.5 °C	1,139 mm	9	150
2015	32.2 °C29 July 2015	-29.8 °C14 January 2015	6.7 °C	925 mm	10	140
2014	32.5 °C1 July 2014	-29.4 °C22 January 2014	6.5 °C	1,019 mm	4	144
2013	33.9 °C15 July 2013	-32.5 °C17 December 2013	6.9 °C	938 mm	9	149
2012	33.8 °C14 July 2012	-26.9 °C15 January 2012	7.9 °C	939 mm	16	142
2011	34.0 °C21 July 2011	-30.7 °C24 January 2011	7.5 °C	1,273 mm	9	139
2010	34.5 °C7 July 2010	-21.4 °C10 December 2010	8.3 °C	1,091 mm	16	130
2009	31.8 °C17 August 2009	-33.6 °C15 January 2009	6.2 °C	1,008 mm	6	145
2008	31.5 °C7 June 2008	-27.5 °C21 January 2008	6.6 °C	1,186 mm	3	148
2007	32.3 °C26 June 2007	-27.0 °C17 January 2007	6.6 °C	997 mm	9	148
2006	33.8 °C1 August 2006	-20.8 °C11 February 2006	7.8 °C	1,211 mm	7	137
2005	32.9 °C11 July 2005	-31.8 °C21 January 2005	7.0 °C	1,129 mm	19	147
2004	31.1 °C22 July 2004	-30.1 °C15 February 2004	6.0 °C	891 mm	1	154
2003	34.0 °C23 June 2003	-31.7 °C16 February 2003	6.0 °C	1,115 mm	9	152
2002	34.2 °C2 July 2002	-24.1 °C9 December 2002	7.2 °C	905 mm	17	160
2001	35.4 °C9 August 2001	-24.4 °C22 February 2001	7.7 °C	852 mm	18	152
2000	29.7 °C26 June 2000	-30.3 °C18 January 2000	6.1 °C	1,108 mm	0	138
1999	32.1 °C17 July 1999	-29.8 °C14 January 1999	7.8 °C	1,027 mm	22	137
1998	31.9 °C15 July 1998	-29.4 °C1 January 1998	8.2 °C	980 mm	7	127
1997	31.8 °C10 June 1997	-31.6 °C30 January 1997	5.6 °C	1,043 mm	7	162
1996	31.0 °C7 August 1996	-29.7 °C4 February 1996	6.3 °C	1,204 mm	2	149
1995	34.4 °C19 June 1995	-29.6 °C11 January 1995	6.5 °C	1,073 mm	11	149
1994	34.1 °C18 June 1994	-35.0 °C27 January 1994	5.9 °C	1,019 mm	4	146
1993	34.0 °C6 July 1993	-33.1 °C28 December 1993	5.6 °C	1,109 mm	10	154
1992	31.2 °C25 August 1992	-32.8 °C17 January 1992	5.5 °C	989 mm	4	149
1991	34.9 °C20 July 1991	-27.8 °C25 January 1991	7.1 °C	905 mm	16	144
1990	31.4 °C27 April 1990	-30.0 °C26 February 1990	7.2 °C	1,222 mm	11	150
1989	33.2 °C23 June 1989	-31.9 °C30 December 1989	5.5 °C	920 mm	15	155
1988	35.2 °C3 August 1988	-31.1 °C14 January 1988	6.8 °C	839 mm	25	147
1987	34.2 °C17 August 1987	-29.9 °C27 January 1987	6.9 °C	897 mm	12	147
1986	31.8 °C25 July 1986	-29.7 °C14 January 1986	6.1 °C	1,202 mm	2	151
1985	32.7 °C25 July 1985	-29.7 °C19 December 1985	6.1 °C	854 mm	6	154
1984	32.0 °C8 June 1984	-30.0 °C27 December 1984	6.6 °C	959 mm	7	149
1983	33.5 °C15 June 1983	-29.8 °C21 December 1983	6.9 °C	1,271 mm	24	142
1982	33.7 °C17 July 1982	-32.2 °C18 January 1982	6.1 °C	938 mm	6	151
1981	33.8 °C8 July 1981	-35.8 °C4 January 1981	6.8 °C	1,078 mm	5	142
1980	32.8 °C25 June 1980	-32.3 °C25 December 1980	5.5 °C	970 mm	3	162
1979	33.4 °C25 July 1979	-29.7 °C10 February 1979	6.8 °C	916 mm	12	141
1978	33.6 °C28 May 1978	-31.1 °C5 February 1978	5.5 °C	988 mm	11	164
1977	36.0 °C20 July 1977	-28.4 °C12 December 1977	6.6 °C	1,055 mm	15	148
1976	32.4 °C5 July 1976	-33.4 °C24 January 1976	5.2 °C	1,269 mm	8	165
1975	36.9 °C1 August 1975	-31.3 °C20 December 1975	6.7 °C	1,103 mm	22	161
1974	29.9 °C14 July 1974	-31.5 °C18 January 1974	5.6 °C	1,211 mm	0	177
1973	32.9 °C8 July 1973	-29.3 °C8 January 1973	7.2 °C	1,182 mm	14	138
1972	32.2 °C12 July 1972	-31.0 °C23 February 1972	5.0 °C	1,172 mm	5	176
1971	33.5 °C30 June 1971	-32.2 °C3 February 1971	5.8 °C	992 mm	2	161
1970	32.3 °C29 July 1970	-31.0 °C20 January 1970	5.8 °C	874 mm	13	160
1969	32.7 °C27 June 1969	-28.3 °C25 December 1969	6.2 °C	998 mm	6	165
1968	32.9 °C18 July 1968	-33.3 °C9 January 1968	5.6 °C	882 mm	7	153
1967	31.5 °C4 June 1967	-34.4 °C13 February 1967	5.5 °C	1,005 mm	3	172
1966	33.6 °C3 July 1966	-28.5 °C20 February 1966	6.3 °C	906 mm	5	156
1965	31.8 °C28 June 1965	-32.7 °C15 January 1965	5.5 °C	861 mm	5	170
1964	32.3 °C18 July 1964	-27.5 °C10 February 1964	6.1 °C	804 mm	6	163
1963	34.2 °C25 July 1963	-31.3 °C4 February 1963	5.2 °C	970 mm	13	156
1962	31.3 °C18 May 1962	-33.2 °C2 February 1962	5.3 °C	983 mm	4	170
1961	30.1 °C4 September 1961	-28.5 °C22 January 1961	6.1 °C	999 mm	1	162
1960	32.0 °C19 August 1960	-29.3 °C10 January 1960	6.5 °C	924 mm	6	154
1959	33.0 °C29 June 1959	-28.9 °C26 January 1959	6.2 °C	1,069 mm	14	159
1958	29.8 °C31 August 1958	-29.3 °C11 December 1958	5.7 °C	1,049 mm	0	148
1957	32.0 °C23 June 1957	-37.7 °C15 January 1957	6.6 °C	1,029 mm	9	143
1956	32.3 °C14 June 1956	-27.5 °C2 January 1956	5.4 °C	860 mm	5	171
1955	34.1 °C9 July 1955	-32.4 °C22 December 1955	6.4 °C	824 mm	26	152
1954	29.9 °C25 August 1954	-31.0 °C13 February 1954	5.7 °C	1,301 mm	0	149
1953	35.2 °C17 July 1953	-23.6 °C2 February 1953	7.7 °C	875 mm	11	122
1952	32.4 °C23 July 1952	-29.8 °C30 January 1952	6.7 °C	1,097 mm	10	150
1951	29.4 °C9 July 1951	-32.5 °C10 February 1951	6.1 °C	1,137 mm	0	150
1950	31.9 °C13 July 1950	-30.5 °C4 March 1950	5.6 °C	1,029 mm	3	162
1949	32.8 °C13 June 1949	-24.8 °C6 February 1949	7.1 °C	944 mm	20	147
1948	33.6 °C27 August 1948	-31.6 °C19 January 1948	6.2 °C	884 mm	6	146
1947	32.7 °C14 August 1947	-26.8 °C1 January 1947	6.2 °C	1,089 mm	9	174
1946	33.6 °C30 June 1946	-31.5 °C20 January 1946	6.5 °C	1,044 mm	6	142
1945	31.1 °C30 June 1945	-26.3 °C7 January 1945	6.1 °C	1,312 mm	3	141
1944	33.2 °C11 August 1944	-25.9 °C9 February 1944	5.9 °C	863 mm	14	170
1943	30.7 °C11 July 1943	-27.5 °C22 January 1943	5.4 °C	943 mm	2	162
1942	31.6 °C22 August 1942	-33.2 °C8 January 1942	5.9 °C	1,000 mm	4	153
1941	31.6 °C1 July 1941	-30.2 °C21 December 1941	5.4 °C	901 mm	5	163
1940	29.7 °C23 July 1940	-25.8 °C4 December 1940	5.4 °C	1,085 mm	0	167

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

11.8 °C

+0.8 °C

Hot days (≥ 30 °C)

16 d/yr

Frost days (< 0 °C)

151 d/yr

-1

Annual rainfall

1026 mm

-10 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	-5.5 °C	+0.3 °C	44 mm	-25 mm
Feb	-5.1 °C	-1.2 °C	81 mm	+16 mm
Mar	4.6 °C	+2.3 °C	87 mm	+12 mm
Apr	11.6 °C	+0.8 °C	99 mm	+6 mm
May	18.7 °C	0.0 °C	112 mm	+23 mm
Jun	25.1 °C	+1.4 °C	91 mm	-3 mm
Jul	27.3 °C	+1.2 °C	83 mm	-11 mm
Aug	26.0 °C	+1.2 °C	56 mm	-37 mm
Sep	22.2 °C	+2.1 °C	54 mm	-40 mm
Oct	15.6 °C	+2.5 °C	135 mm	+42 mm
Nov	3.2 °C	-1.9 °C	112 mm	+21 mm
Dec	-4.0 °C	-1.3 °C	71 mm	-14 mm

The year's extremes

Hottest day

35.2 °C

24 Jun 2025

Coldest day

-27.5 °C

9 Dec 2025

Wettest day

41.0 mm

31 Oct 2025

Windiest day

38.9 km/h

19 Dec 2025

Strongest gust

95.0 km/h

19 Dec 2025

Hottest feels-like

38.4 °C

24 Jun 2025

Coldest feels-like

-32.7 °C

9 Dec 2025

Snowiest day

17.4 cm

16 Feb 2025

Sunniest day

15.4 h

30 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 L'Assomption?

L'Assomption has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.3 °C and it receives 1,036 mm of precipitation per year.

What is the hottest day ever recorded in L'Assomption?

The hottest day measured in L'Assomption between 1940 and 2025 was 1 August 1975, reaching 36.9 °C.

What is the coldest day in L'Assomption?

The coldest day measured in L'Assomption between 1940 and 2025 was 15 January 1957, at -37.7 °C.

Does it snow in L'Assomption?

Yes. L'Assomption gets on average 159.2 cm of snow per year and has around 152 frost days.

Has the climate of L'Assomption warmed?

Yes: L'Assomption warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in L'Assomption?

The wettest day measured in L'Assomption between 1940 and 2025 was 9 August 2024, with 105 mm of rain in 24 hours.

What was the windiest day in L'Assomption?

The windiest day measured in L'Assomption between 1940 and 2025 was 25 February 1956, with winds reaching 52.3 km/h.

What is the warmest month in L'Assomption?

The warmest month in L'Assomption is July (21.1 °C on average); the coldest is January (-10.2 °C).

How much does it rain in L'Assomption?

L'Assomption receives on average 1,036 mm of precipitation per year, spread over about 133 rainy days.

Is it sunny in L'Assomption?

L'Assomption gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.

What is the biggest single-day snowfall in L'Assomption?

The heaviest 24-hour snowfall measured in L'Assomption between 1940 and 2025 was 30 November 1944, with 33.0 cm.

Are there tropical nights in L'Assomption?

Yes: L'Assomption has on average 7 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in L'Assomption?

In L'Assomption, between 1940 and 2025, the highest apparent temperature reached 42.1 °C on 1 August 1975, and the lowest was -43.6 °C on 15 January 1957.

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