Record highRecord low2026 daily maximum2026 daily minimum
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
Year with most
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
Complete yearUnder 90 percent of days
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.
Cooler than the station meanWarmer than the station mean
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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.