Shawinigan Weather Records (CA007018000)

Record envelope, standing records and threshold days for Shawinigan (CA007018000), Quebec, Canada, with 103 years of record.

Key Facts for Shawinigan

Shawinigan (CA007018000) is a weather station in Quebec, Canada at 46.57 latitude and -72.75 longitude, 122 m (400 ft) above sea level.
The station reports from 1902 to 2004, 103 years of record.
1,464 records set at Shawinigan still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Shawinigan set a daily record high minimum temperature of 12.0 C (53.6 F) on 13 October 1983.

About the Station

Location: Quebec, Canada, 46.57 latitude, -72.75 longitude.
Elevation: 122 m (400 ft).
Period of record: 1902 to 2004, 103 years.
Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Shawinigan. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Shawinigan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	9.4 C (48.9 F)	-40.0 C (-40.0 F)	n/a	n/a
Feb	9.4 C (48.9 F)	-37.8 C (-36.0 F)	n/a	n/a
Mar	17.8 C (64.0 F)	-33.9 C (-29.0 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-24.4 C (-11.9 F)	n/a	n/a
May	33.9 C (93.0 F)	-7.2 C (19.0 F)	n/a	n/a
Jun	35.6 C (96.1 F)	-2.8 C (27.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	3.3 C (37.9 F)	n/a	n/a
Aug	37.2 C (99.0 F)	1.1 C (34.0 F)	n/a	n/a
Sep	32.8 C (91.0 F)	-6.7 C (19.9 F)	n/a	n/a
Oct	30.0 C (86.0 F)	-11.1 C (12.0 F)	n/a	n/a
Nov	19.4 C (66.9 F)	-25.0 C (-13.0 F)	n/a	n/a
Dec	11.1 C (52.0 F)	-42.2 C (-44.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Shawinigan still stand. 1914 holds the most, with 72.

Standing records at Shawinigan by the year they were set
Year set	Standing records
1902	11
1903	9
1904	10
1905	14
1906	13
1907	3
1908	49
1909	13
1910	27
1911	43
1912	53
1913	40
1914	72
1915	17
1916	34
1917	20
1918	21
1919	26
1920	13
1921	26
1922	24
1923	23
1924	4
1925	12
1926	5
1927	14
1928	9
1929	16
1930	12
1931	14
1932	16
1933	31
1934	24
1935	10
1936	22
1937	20
1938	12
1939	7
1940	18
1941	15
1942	21
1943	16
1944	24
1945	24
1946	28
1947	36
1948	25
1949	19
1950	14
1951	10
1952	5
1953	17
1954	13
1955	4
1956	21
1957	14
1958	6
1959	8
1960	7
1961	11
1962	10
1963	16
1964	11
1965	16
1966	26
1967	8
1968	19
1969	14
1970	16
1971	14
1972	8
1973	12
1974	13
1975	10
1976	17
1977	20
1978	6
1979	25
1980	6
1981	28
1982	16
1983	8

All-Time Record Progression

2 new records

2 all-time records were set at Shawinigan between 8 August 1949 and 3 April 1975. Each dot is a new record.

When Shawinigan set new all-time records
Date	Kind	Detail
1949-08-08	Record high maximum temperature	Record high maximum temperature 37.2 C (99.0 F)
1975-04-03	Record daily snowfall	Record daily snowfall 52.1 cm (20.5 in)

Wettest Day of Each Month

Sep: 104.1 mm (4.1 in)

The wettest day on record for each calendar month at Shawinigan. The most was 104.1 mm (4.1 in) on 30 September 1924.

Record daily precipitation for each month at Shawinigan
Month	Record daily precipitation (mm)	Date
Jan	57.2 mm (2.3 in)	24 January 1947
Feb	43.2 mm (1.7 in)	19 February 1939
Mar	50.8 mm (2.0 in)	19 March 1975
Apr	60.5 mm (2.4 in)	13 April 1920
May	55.9 mm (2.2 in)	22 May 1920
Jun	95.0 mm (3.7 in)	22 June 1981
Jul	96.0 mm (3.8 in)	10 July 1926
Aug	78.7 mm (3.1 in)	18 August 1955
Sep	104.1 mm (4.1 in)	30 September 1924
Oct	74.7 mm (2.9 in)	24 October 1923
Nov	85.3 mm (3.4 in)	3 November 1927
Dec	53.3 mm (2.1 in)	8 December 1974

Period of Record Coverage

1902 to 1983

82 years of record at Shawinigan, 1902 to 1983. 6 years have data for under 90 percent of days and are left out of rankings: 1902, 1906, 1907, 1909, 1917, 1983.

Days with data per year at Shawinigan
Year	Days with data	Share of year	Complete
1902	175	48%	No
1903	365	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	290	79%	No
1907	153	42%	No
1908	366	100%	Yes
1909	247	68%	No
1910	365	100%	Yes
1911	365	100%	Yes
1912	366	100%	Yes
1913	365	100%	Yes
1914	364	100%	Yes
1915	365	100%	Yes
1916	366	100%	Yes
1917	181	50%	No
1918	364	100%	Yes
1919	365	100%	Yes
1920	366	100%	Yes
1921	364	100%	Yes
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	365	100%	Yes
1929	364	100%	Yes
1930	365	100%	Yes
1931	365	100%	Yes
1932	365	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	358	98%	Yes
1946	363	99%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	335	92%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	364	100%	Yes
1967	364	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	350	96%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	366	100%	Yes
1981	364	100%	Yes
1982	338	93%	Yes
1983	170	47%	No

Latest Records

Latest records at Shawinigan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 October 1983	Shawinigan, CA	daily high min	12.0 C (53.6 F)	2.0 C (3.6 F)	42 years	24 of 100 (Routine)
7 September 1983	Shawinigan, CA	daily high min	18.0 C (64.4 F)	0.2 C (0.4 F)	37 years	19 of 100 (Routine)
20 August 1983	Shawinigan, CA	daily high min	19.0 C (66.2 F)	0.7 C (1.3 F)	76 years	32 of 100 (Routine)
11 July 1983	Shawinigan, CA	daily low min	4.0 C (39.2 F)	2.1 C (3.8 F)	69 years	34 of 100 (Routine)
4 July 1983	Shawinigan, CA	daily rain	28.2 mm (1.1 in)	0.3 mm (0.01 in)	40 years	20 of 100 (Routine)
17 June 1983	Shawinigan, CA	daily high min (Tie)	17.0 C (62.6 F)	tie	1 year	2 of 100 (Routine)
27 May 1983	Shawinigan, CA	daily rain	18.4 mm (0.7 in)	2.7 mm (0.11 in)	26 years	19 of 100 (Routine)
9 May 1983	Shawinigan, CA	daily low max	3.0 C (37.4 F)	2.6 C (4.7 F)	76 years	35 of 100 (Notable)
2 May 1983	Shawinigan, CA	daily rain	38.3 mm (1.5 in)	7.8 mm (0.31 in)	49 years	31 of 100 (Routine)
11 March 1983	Shawinigan, CA	daily high min	2.0 C (35.6 F)	2.0 C (3.6 F)	2 years	10 of 100 (Routine)
3 February 1983	Shawinigan, CA	daily high max	4.0 C (39.2 F)	0.7 C (1.3 F)	31 years	18 of 100 (Routine)
3 February 1983	Shawinigan, CA	daily rain	33.0 mm (1.3 in)	5.1 mm (0.20 in)	11 years	18 of 100 (Routine)
25 January 1983	Shawinigan, CA	daily high min	0.0 C (32.0 F)	1.1 C (2.0 F)	29 years	17 of 100 (Routine)
10 January 1983	Shawinigan, CA	daily rain	26.0 mm (1.0 in)	1.9 mm (0.07 in)	53 years	26 of 100 (Routine)
29 December 1982	Shawinigan, CA	daily high max	4.0 C (39.2 F)	0.7 C (1.3 F)	75 years	31 of 100 (Routine)
28 December 1982	Shawinigan, CA	daily high max	6.0 C (42.8 F)	4.3 C (7.7 F)	75 years	36 of 100 (Notable)
6 December 1982	Shawinigan, CA	daily high max	11.0 C (51.8 F)	2.1 C (3.8 F)	31 years	20 of 100 (Routine)
4 December 1982	Shawinigan, CA	monthly high min	3.5 C (38.3 F)	0.2 C (0.4 F)	30 years	27 of 100 (Routine)
4 December 1982	Shawinigan, CA	daily high max	11.0 C (51.8 F)	2.7 C (4.9 F)	28 years	20 of 100 (Routine)
3 December 1982	Shawinigan, CA	daily high max	11.0 C (51.8 F)	4.3 C (7.7 F)	43 years	26 of 100 (Routine)

Climate Trend

71 complete years, 1903 to 1981

One stripe for each of 71 complete years at Shawinigan, 1903 to 1981. Blue stripes are years cooler than the station's own mean of 4.2 C (39.5 F); red stripes are warmer. The coolest year was 1914, at 0.4 C (32.6 F), and the warmest was 1949, at 5.9 C (42.6 F). The strongest colour marks a difference of 3.9 C (7.0 F).

Annual mean temperature at Shawinigan as warming stripes, 1903 to 1981
Year	Annual mean temperature	Difference from the station mean
1903	3.8 C	-0.38 C
1904	2.0 C	-2.17 C
1905	2.7 C	-1.46 C
1910	2.7 C	-1.50 C
1911	2.4 C	-1.76 C
1912	1.0 C	-3.18 C
1913	2.3 C	-1.86 C
1914	0.4 C	-3.81 C
1915	3.4 C	-0.76 C
1916	2.3 C	-1.86 C
1918	4.0 C	-0.21 C
1919	4.6 C	+0.44 C
1920	4.8 C	+0.64 C
1921	5.8 C	+1.66 C
1922	5.1 C	+0.88 C
1923	3.9 C	-0.31 C
1924	3.9 C	-0.30 C
1925	4.1 C	-0.03 C
1926	3.2 C	-0.94 C
1927	4.9 C	+0.75 C
1928	4.0 C	-0.17 C
1929	3.6 C	-0.55 C
1930	4.4 C	+0.25 C
1931	5.5 C	+1.33 C
1932	3.9 C	-0.30 C
1933	3.1 C	-1.07 C
1934	2.7 C	-1.51 C
1935	3.3 C	-0.87 C
1936	3.1 C	-1.05 C
1937	5.0 C	+0.84 C
1938	4.1 C	-0.03 C
1939	3.5 C	-0.70 C
1940	4.3 C	+0.14 C
1941	5.5 C	+1.30 C
1942	5.5 C	+1.32 C
1943	4.2 C	+0.04 C
1944	5.2 C	+1.04 C
1945	5.2 C	+1.06 C
1946	4.9 C	+0.70 C
1947	4.9 C	+0.74 C
1948	5.2 C	+1.06 C
1949	5.9 C	+1.70 C
1950	4.0 C	-0.17 C
1951	4.3 C	+0.10 C
1952	5.1 C	+0.89 C
1953	5.7 C	+1.53 C
1954	3.9 C	-0.24 C
1955	4.3 C	+0.17 C
1956	3.2 C	-0.98 C
1958	3.7 C	-0.51 C
1959	4.4 C	+0.21 C
1960	5.2 C	+1.04 C
1961	4.8 C	+0.62 C
1962	4.0 C	-0.15 C
1963	4.0 C	-0.17 C
1964	4.8 C	+0.66 C
1965	4.3 C	+0.09 C
1966	5.4 C	+1.27 C
1967	4.4 C	+0.24 C
1968	4.7 C	+0.49 C
1969	5.2 C	+1.07 C
1970	4.7 C	+0.52 C
1971	4.4 C	+0.23 C
1972	3.7 C	-0.52 C
1973	5.6 C	+1.46 C
1974	4.1 C	-0.07 C
1975	5.2 C	+1.05 C
1976	3.7 C	-0.49 C
1977	5.0 C	+0.86 C
1978	4.2 C	-0.01 C
1981	5.6 C	+1.38 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1903 to 1981. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 71 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Shawinigan
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.7) per decade	1903 to 1981	71	Rise
Mean daily maximum	0.2 C (0.1 to 0.3) per decade	0.3 F (0.1 to 0.5) per decade	1903 to 1981	71	Rise
Mean daily minimum	0.3 C (0.2 to 0.5) per decade	0.6 F (0.4 to 0.8) per decade	1903 to 1981	71	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1902 to 1983

Yearly extremes at Shawinigan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1949	32.2 C (90.0 F)	82
Coldest night (TNn)	-42.2 C (-44.0 F)	1914	-32.2 C (-26.0 F)	82
Wettest day (Rx1day)	104.1 mm (4.1 in)	1924	47.0 mm (1.9 in)	82
Wettest five days (Rx5day)	155.2 mm (6.1 in)	1924	75.3 mm (3.0 in)	82
Longest dry spell (CDD)	31 days	1918	17 days	82

Hottest day (TXx)

The hottest day of the year at Shawinigan, 1902 to 1983. The record is 37.2 C (99.0 F) in 1949, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at Shawinigan by year
Year	Hottest day (TXx)
1902	29.4 C (84.9 F)
1903	32.2 C (90.0 F)
1904	33.3 C (91.9 F)
1905	32.2 C (90.0 F)
1906	32.2 C (90.0 F)
1907	28.9 C (84.0 F)
1908	32.2 C (90.0 F)
1909	31.7 C (89.1 F)
1910	30.6 C (87.1 F)
1911	36.7 C (98.1 F)
1912	36.7 C (98.1 F)
1913	34.4 C (93.9 F)
1914	31.1 C (88.0 F)
1915	30.6 C (87.1 F)
1916	35.0 C (95.0 F)
1917	16.7 C (62.1 F)
1918	32.2 C (90.0 F)
1919	34.4 C (93.9 F)
1920	33.3 C (91.9 F)
1921	34.4 C (93.9 F)
1922	32.8 C (91.0 F)
1923	34.4 C (93.9 F)
1924	31.1 C (88.0 F)
1925	31.7 C (89.1 F)
1926	31.1 C (88.0 F)
1927	35.0 C (95.0 F)
1928	33.9 C (93.0 F)
1929	31.7 C (89.1 F)
1930	32.2 C (90.0 F)
1931	34.4 C (93.9 F)
1932	31.1 C (88.0 F)
1933	33.3 C (91.9 F)
1934	32.8 C (91.0 F)
1935	32.2 C (90.0 F)
1936	32.2 C (90.0 F)
1937	34.4 C (93.9 F)
1938	33.9 C (93.0 F)
1939	32.8 C (91.0 F)
1940	32.8 C (91.0 F)
1941	35.6 C (96.1 F)
1942	33.9 C (93.0 F)
1943	33.3 C (91.9 F)
1944	36.1 C (97.0 F)
1945	35.6 C (96.1 F)
1946	35.0 C (95.0 F)
1947	35.6 C (96.1 F)
1948	34.4 C (93.9 F)
1949	37.2 C (99.0 F)
1950	30.0 C (86.0 F)
1951	29.4 C (84.9 F)
1952	31.7 C (89.1 F)
1953	36.7 C (98.1 F)
1954	30.0 C (86.0 F)
1955	34.4 C (93.9 F)
1956	31.1 C (88.0 F)
1957	29.4 C (84.9 F)
1958	28.3 C (82.9 F)
1959	32.8 C (91.0 F)
1960	31.1 C (88.0 F)
1961	30.0 C (86.0 F)
1962	31.1 C (88.0 F)
1963	35.6 C (96.1 F)
1964	32.8 C (91.0 F)
1965	31.1 C (88.0 F)
1966	32.8 C (91.0 F)
1967	31.1 C (88.0 F)
1968	33.9 C (93.0 F)
1969	32.2 C (90.0 F)
1970	32.2 C (90.0 F)
1971	30.6 C (87.1 F)
1972	31.1 C (88.0 F)
1973	31.1 C (88.0 F)
1974	29.4 C (84.9 F)
1975	35.0 C (95.0 F)
1976	31.7 C (89.1 F)
1977	33.9 C (93.0 F)
1978	31.7 C (89.1 F)
1979	31.1 C (88.0 F)
1980	31.7 C (89.1 F)
1981	33.0 C (91.4 F)
1982	33.0 C (91.4 F)
1983	28.0 C (82.4 F)

Coldest night (TNn)

The coldest night of the year at Shawinigan, 1902 to 1983. The record is -42.2 C (-44.0 F) in 1914, marked on the chart; the median year is -32.2 C (-26.0 F).

Coldest night (TNn) at Shawinigan by year
Year	Coldest night (TNn)
1902	-29.4 C (-20.9 F)
1903	-34.4 C (-29.9 F)
1904	-36.1 C (-33.0 F)
1905	-33.3 C (-27.9 F)
1906	-31.1 C (-24.0 F)
1907	-19.4 C (-2.9 F)
1908	-38.3 C (-36.9 F)
1909	-28.3 C (-18.9 F)
1910	-36.1 C (-33.0 F)
1911	-35.6 C (-32.1 F)
1912	-40.0 C (-40.0 F)
1913	-36.1 C (-33.0 F)
1914	-42.2 C (-44.0 F)
1915	-32.2 C (-26.0 F)
1916	-32.2 C (-26.0 F)
1917	-37.8 C (-36.0 F)
1918	-34.4 C (-29.9 F)
1919	-30.6 C (-23.1 F)
1920	-33.3 C (-27.9 F)
1921	-27.8 C (-18.0 F)
1922	-33.3 C (-27.9 F)
1923	-35.0 C (-31.0 F)
1924	-35.0 C (-31.0 F)
1925	-35.0 C (-31.0 F)
1926	-30.6 C (-23.1 F)
1927	-31.7 C (-25.1 F)
1928	-31.7 C (-25.1 F)
1929	-33.3 C (-27.9 F)
1930	-32.8 C (-27.0 F)
1931	-28.9 C (-20.0 F)
1932	-30.6 C (-23.1 F)
1933	-37.8 C (-36.0 F)
1934	-37.2 C (-35.0 F)
1935	-35.0 C (-31.0 F)
1936	-33.3 C (-27.9 F)
1937	-29.4 C (-20.9 F)
1938	-33.3 C (-27.9 F)
1939	-30.0 C (-22.0 F)
1940	-29.4 C (-20.9 F)
1941	-27.8 C (-18.0 F)
1942	-32.8 C (-27.0 F)
1943	-33.3 C (-27.9 F)
1944	-31.1 C (-24.0 F)
1945	-33.3 C (-27.9 F)
1946	-31.1 C (-24.0 F)
1947	-30.0 C (-22.0 F)
1948	-35.0 C (-31.0 F)
1949	-31.1 C (-24.0 F)
1950	-30.6 C (-23.1 F)
1951	-37.2 C (-35.0 F)
1952	-32.2 C (-26.0 F)
1953	-27.8 C (-18.0 F)
1954	-33.3 C (-27.9 F)
1955	-31.7 C (-25.1 F)
1956	-30.0 C (-22.0 F)
1957	-37.8 C (-36.0 F)
1958	-32.2 C (-26.0 F)
1959	-34.4 C (-29.9 F)
1960	-33.3 C (-27.9 F)
1961	-32.2 C (-26.0 F)
1962	-37.8 C (-36.0 F)
1963	-35.6 C (-32.1 F)
1964	-30.0 C (-22.0 F)
1965	-32.2 C (-26.0 F)
1966	-32.2 C (-26.0 F)
1967	-35.0 C (-31.0 F)
1968	-32.2 C (-26.0 F)
1969	-24.4 C (-11.9 F)
1970	-30.6 C (-23.1 F)
1971	-35.6 C (-32.1 F)
1972	-35.6 C (-32.1 F)
1973	-35.6 C (-32.1 F)
1974	-31.1 C (-24.0 F)
1975	-30.6 C (-23.1 F)
1976	-36.7 C (-34.1 F)
1977	-28.9 C (-20.0 F)
1978	-27.2 C (-17.0 F)
1979	-31.7 C (-25.1 F)
1980	-32.2 C (-26.0 F)
1981	-36.7 C (-34.1 F)
1982	-31.5 C (-24.7 F)
1983	-31.0 C (-23.8 F)

Wettest day (Rx1day)

The wettest day of the year at Shawinigan, 1902 to 1983. The record is 104.1 mm (4.1 in) in 1924, marked on the chart; the median year is 47.0 mm (1.9 in).

Wettest day (Rx1day) at Shawinigan by year
Year	Wettest day (Rx1day)
1902	25.7 mm (1.0 in)
1903	50.5 mm (2.0 in)
1904	47.2 mm (1.9 in)
1905	50.5 mm (2.0 in)
1906	41.7 mm (1.6 in)
1907	54.6 mm (2.1 in)
1908	30.0 mm (1.2 in)
1909	35.8 mm (1.4 in)
1910	22.4 mm (0.9 in)
1911	34.0 mm (1.3 in)
1912	38.6 mm (1.5 in)
1913	49.3 mm (1.9 in)
1914	34.0 mm (1.3 in)
1915	41.9 mm (1.6 in)
1916	80.3 mm (3.2 in)
1917	67.3 mm (2.6 in)
1918	67.6 mm (2.7 in)
1919	30.5 mm (1.2 in)
1920	60.5 mm (2.4 in)
1921	40.1 mm (1.6 in)
1922	34.3 mm (1.4 in)
1923	74.7 mm (2.9 in)
1924	104.1 mm (4.1 in)
1925	36.6 mm (1.4 in)
1926	96.0 mm (3.8 in)
1927	85.3 mm (3.4 in)
1928	36.1 mm (1.4 in)
1929	35.6 mm (1.4 in)
1930	49.0 mm (1.9 in)
1931	38.6 mm (1.5 in)
1932	41.9 mm (1.6 in)
1933	77.5 mm (3.1 in)
1934	38.6 mm (1.5 in)
1935	50.8 mm (2.0 in)
1936	42.7 mm (1.7 in)
1937	26.2 mm (1.0 in)
1938	62.2 mm (2.4 in)
1939	54.9 mm (2.2 in)
1940	39.4 mm (1.6 in)
1941	31.0 mm (1.2 in)
1942	50.8 mm (2.0 in)
1943	56.4 mm (2.2 in)
1944	41.9 mm (1.6 in)
1945	46.2 mm (1.8 in)
1946	54.6 mm (2.1 in)
1947	57.2 mm (2.3 in)
1948	30.2 mm (1.2 in)
1949	46.7 mm (1.8 in)
1950	44.5 mm (1.8 in)
1951	37.3 mm (1.5 in)
1952	44.5 mm (1.8 in)
1953	44.5 mm (1.8 in)
1954	62.5 mm (2.5 in)
1955	78.7 mm (3.1 in)
1956	46.2 mm (1.8 in)
1957	62.5 mm (2.5 in)
1958	61.5 mm (2.4 in)
1959	56.6 mm (2.2 in)
1960	68.3 mm (2.7 in)
1961	63.8 mm (2.5 in)
1962	50.8 mm (2.0 in)
1963	47.8 mm (1.9 in)
1964	34.8 mm (1.4 in)
1965	65.0 mm (2.6 in)
1966	46.7 mm (1.8 in)
1967	47.0 mm (1.9 in)
1968	49.5 mm (1.9 in)
1969	40.6 mm (1.6 in)
1970	48.3 mm (1.9 in)
1971	45.7 mm (1.8 in)
1972	44.5 mm (1.8 in)
1973	46.7 mm (1.8 in)
1974	53.3 mm (2.1 in)
1975	52.1 mm (2.1 in)
1976	60.5 mm (2.4 in)
1977	34.3 mm (1.4 in)
1978	43.2 mm (1.7 in)
1979	60.5 mm (2.4 in)
1980	47.0 mm (1.9 in)
1981	95.0 mm (3.7 in)
1982	38.2 mm (1.5 in)
1983	50.0 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Shawinigan, 1902 to 1983. The record is 155.2 mm (6.1 in) in 1924, marked on the chart; the median year is 75.3 mm (3.0 in).

Wettest five days (Rx5day) at Shawinigan by year
Year	Wettest five days (Rx5day)
1902	61.5 mm (2.4 in)
1903	70.9 mm (2.8 in)
1904	104.6 mm (4.1 in)
1905	55.6 mm (2.2 in)
1906	51.1 mm (2.0 in)
1907	63.5 mm (2.5 in)
1908	42.7 mm (1.7 in)
1909	98.8 mm (3.9 in)
1910	47.3 mm (1.9 in)
1911	55.1 mm (2.2 in)
1912	86.1 mm (3.4 in)
1913	76.2 mm (3.0 in)
1914	80.5 mm (3.2 in)
1915	71.2 mm (2.8 in)
1916	110.0 mm (4.3 in)
1917	80.0 mm (3.1 in)
1918	91.0 mm (3.6 in)
1919	50.3 mm (2.0 in)
1920	78.8 mm (3.1 in)
1921	44.7 mm (1.8 in)
1922	47.0 mm (1.9 in)
1923	85.7 mm (3.4 in)
1924	155.2 mm (6.1 in)
1925	51.1 mm (2.0 in)
1926	100.1 mm (3.9 in)
1927	133.0 mm (5.2 in)
1928	76.0 mm (3.0 in)
1929	56.4 mm (2.2 in)
1930	79.8 mm (3.1 in)
1931	57.9 mm (2.3 in)
1932	78.2 mm (3.1 in)
1933	115.6 mm (4.6 in)
1934	58.5 mm (2.3 in)
1935	73.7 mm (2.9 in)
1936	68.1 mm (2.7 in)
1937	51.5 mm (2.0 in)
1938	77.5 mm (3.1 in)
1939	67.1 mm (2.6 in)
1940	96.3 mm (3.8 in)
1941	56.9 mm (2.2 in)
1942	68.3 mm (2.7 in)
1943	69.4 mm (2.7 in)
1944	61.3 mm (2.4 in)
1945	62.9 mm (2.5 in)
1946	79.0 mm (3.1 in)
1947	108.8 mm (4.3 in)
1948	65.8 mm (2.6 in)
1949	70.0 mm (2.8 in)
1950	70.9 mm (2.8 in)
1951	85.0 mm (3.3 in)
1952	96.3 mm (3.8 in)
1953	74.9 mm (2.9 in)
1954	79.3 mm (3.1 in)
1955	93.2 mm (3.7 in)
1956	79.9 mm (3.1 in)
1957	102.4 mm (4.0 in)
1958	75.7 mm (3.0 in)
1959	74.2 mm (2.9 in)
1960	78.5 mm (3.1 in)
1961	80.3 mm (3.2 in)
1962	83.3 mm (3.3 in)
1963	76.3 mm (3.0 in)
1964	68.6 mm (2.7 in)
1965	84.8 mm (3.3 in)
1966	67.3 mm (2.6 in)
1967	73.2 mm (2.9 in)
1968	62.0 mm (2.4 in)
1969	75.7 mm (3.0 in)
1970	62.5 mm (2.5 in)
1971	65.3 mm (2.6 in)
1972	98.3 mm (3.9 in)
1973	102.4 mm (4.0 in)
1974	70.6 mm (2.8 in)
1975	73.7 mm (2.9 in)
1976	82.3 mm (3.2 in)
1977	91.0 mm (3.6 in)
1978	69.4 mm (2.7 in)
1979	73.2 mm (2.9 in)
1980	78.2 mm (3.1 in)
1981	127.8 mm (5.0 in)
1982	64.4 mm (2.5 in)
1983	78.0 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Shawinigan, 1902 to 1983. The record is 31 days in 1918, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Shawinigan by year
Year	Longest dry spell (CDD)
1902	9 days
1903	21 days
1904	15 days
1905	14 days
1906	14 days
1907	12 days
1908	26 days
1909	19 days
1910	23 days
1911	15 days
1912	19 days
1913	17 days
1914	25 days
1915	21 days
1916	14 days
1917	20 days
1918	31 days
1919	14 days
1920	11 days
1921	19 days
1922	24 days
1923	18 days
1924	30 days
1925	18 days
1926	15 days
1927	16 days
1928	8 days
1929	14 days
1930	17 days
1931	16 days
1932	20 days
1933	22 days
1934	14 days
1935	15 days
1936	10 days
1937	15 days
1938	18 days
1939	24 days
1940	13 days
1941	21 days
1942	17 days
1943	18 days
1944	19 days
1945	17 days
1946	16 days
1947	19 days
1948	17 days
1949	20 days
1950	17 days
1951	14 days
1952	14 days
1953	17 days
1954	9 days
1955	12 days
1956	14 days
1957	15 days
1958	15 days
1959	11 days
1960	14 days
1961	26 days
1962	14 days
1963	20 days
1964	14 days
1965	20 days
1966	11 days
1967	15 days
1968	19 days
1969	20 days
1970	23 days
1971	12 days
1972	13 days
1973	10 days
1974	12 days
1975	20 days
1976	10 days
1977	18 days
1978	29 days
1979	21 days
1980	16 days
1981	11 days
1982	23 days
1983	13 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

71 years with a frost

Across 71 years with a frost, the median last spring frost at Shawinigan falls on 13 May and the median first autumn frost on 30 September, which leaves a median of 142 days between them.

In 1949 to 1981 the median growing season was 143 days. That is 2 days more than in 1903 to 1937.

Fitted over all years, the growing season changes by +1.5 days per decade at this station.

Frost dates and growing season at Shawinigan
Measure	Median, all years	Earliest period (1903 to 1937)	Recent period (1949 to 1981)	Recent against earliest	Fitted trend
Last spring frost	13 May	16 May	11 May	5 days earlier	-0.9 days per decade
First autumn frost	30 September	30 September	2 October	2 days later	+0.5 days per decade
Growing days	142 days	141 days	143 days	2 days more	+1.5 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

74 years, 1903 to 1982

A day with at least 48.2 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 108.0 mm (4.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Shawinigan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	48.2 mm (1.9 in)
5 years	62.1 mm (2.4 in)
10 years	72.1 mm (2.8 in)
25 years	85.7 mm (3.4 in)
50 years	96.6 mm (3.8 in)
100 years	108.0 mm (4.3 in)	Longer than the 74 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 74 years of values from 1903 to 1982.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 104.1 mm (4.1 in) in 1924; 96.0 mm (3.8 in) in 1926; 95.0 mm (3.7 in) in 1981.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Shawinigan, at 1930. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1930 ran 0.7 C (1.2 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Shawinigan, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1930	-0.7	-1.2	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Shawinigan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Shawinigan threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).