Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Dundurn. 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 Dundurn, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.9 C (48.0 F)
-47.2 C (-53.0 F)
n/a
n/a
Feb
13.3 C (55.9 F)
-47.8 C (-54.0 F)
n/a
n/a
Mar
19.4 C (66.9 F)
-36.7 C (-34.1 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-28.3 C (-18.9 F)
n/a
n/a
May
37.0 C (98.6 F)
-12.0 C (10.4 F)
n/a
n/a
Jun
39.4 C (102.9 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
-2.8 C (27.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
-5.0 C (23.0 F)
n/a
n/a
Sep
36.5 C (97.7 F)
-12.2 C (10.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-25.0 C (-13.0 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-36.7 C (-34.1 F)
n/a
n/a
Dec
15.0 C (59.0 F)
-43.0 C (-45.4 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Dundurn still stand. 1936 holds the most, with 53.
Standing records at Dundurn by the year they were set
Year set
Standing records
1923
16
1924
24
1925
22
1926
22
1927
24
1928
33
1929
25
1930
23
1931
34
1932
26
1933
22
1934
34
1935
42
1936
53
1937
26
1938
16
1939
40
1940
33
1941
21
1942
29
1943
29
1944
12
1945
26
1946
22
1947
27
1948
18
1949
16
1950
6
1951
11
1952
24
1953
20
1954
43
1955
22
1956
22
1957
18
1958
18
1959
20
1960
13
1961
35
1962
35
1963
32
1964
19
1965
24
1966
17
1967
21
1968
36
1969
23
1970
18
1971
11
1972
30
1973
16
1974
14
1975
13
1976
23
1977
35
1978
13
1979
11
1980
23
1981
33
1982
17
1983
33
All-Time Record Progression
5 new records
5 all-time records were set at Dundurn between 16 August 1961 and 27 September 1982. Each dot is a new record.
When Dundurn set new all-time records
Date
Kind
Detail
1961-08-16
Record high minimum temperature
Record high minimum temperature 23.3 C (73.9 F)
1970-01-16
Record low maximum temperature
Record low maximum temperature -35.6 C (-32.1 F)
1970-07-28
Record daily precipitation
Record daily precipitation 122.2 mm (4.8 in)
1972-01-25
Record low maximum temperature
Record low maximum temperature -36.7 C (-34.1 F)
1982-09-27
Record daily snowfall
Record daily snowfall 40.0 cm (15.7 in)
Wettest Day of Each Month
Jul: 122.2 mm (4.8 in)
The wettest day on record for each calendar month at Dundurn. The most was 122.2 mm (4.8 in) on 28 July 1970.
Record daily precipitation for each month at Dundurn
Month
Record daily precipitation (mm)
Date
Jan
20.3 mm (0.8 in)
30 January 1925
Feb
23.4 mm (0.9 in)
3 February 1962
Mar
30.5 mm (1.2 in)
13 March 1953
Apr
27.5 mm (1.1 in)
25 April 1983
May
34.0 mm (1.3 in)
4 May 1977
Jun
82.6 mm (3.3 in)
4 June 1925
Jul
122.2 mm (4.8 in)
28 July 1970
Aug
54.9 mm (2.2 in)
5 August 1922
Sep
52.1 mm (2.1 in)
1 September 1953
Oct
39.4 mm (1.6 in)
12 October 1924
Nov
24.1 mm (0.9 in)
15 November 1969
Dec
19.1 mm (0.8 in)
12 December 1955
Period of Record Coverage
1923 to 1983
Complete yearUnder 90 percent of days
61 years of record at Dundurn, 1923 to 1983. 6 years have data for under 90 percent of days and are left out of rankings: 1923, 1949, 1950, 1951, 1952, 1965.
Cooler than the station meanWarmer than the station mean
One stripe for each of 54 complete years at Dundurn, 1924 to 1983. Blue stripes are years cooler than the station's own mean of 2.3 C (36.1 F); red stripes are warmer. The coolest year was 1927, at 0.2 C (32.3 F), and the warmest was 1981, at 4.8 C (40.6 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Dundurn as warming stripes, 1924 to 1983
Year
Annual mean temperature
Difference from the station mean
1924
1.2 C
-1.04 C
1925
1.6 C
-0.64 C
1926
2.3 C
-0.02 C
1927
0.2 C
-2.11 C
1928
2.8 C
+0.57 C
1929
1.1 C
-1.21 C
1930
2.9 C
+0.67 C
1931
4.8 C
+2.48 C
1932
2.0 C
-0.24 C
1933
1.7 C
-0.54 C
1934
3.5 C
+1.22 C
1935
0.9 C
-1.36 C
1936
0.8 C
-1.48 C
1937
1.6 C
-0.66 C
1938
3.1 C
+0.82 C
1939
3.1 C
+0.82 C
1940
2.8 C
+0.50 C
1941
3.6 C
+1.34 C
1942
3.0 C
+0.75 C
1943
2.8 C
+0.53 C
1944
3.4 C
+1.12 C
1945
1.6 C
-0.65 C
1946
1.8 C
-0.44 C
1947
1.3 C
-0.97 C
1953
3.2 C
+0.97 C
1954
2.1 C
-0.19 C
1955
0.6 C
-1.63 C
1956
1.4 C
-0.90 C
1957
2.4 C
+0.08 C
1958
3.2 C
+0.88 C
1959
2.2 C
-0.05 C
1960
2.1 C
-0.14 C
1961
3.0 C
+0.71 C
1962
2.5 C
+0.22 C
1963
3.1 C
+0.80 C
1964
2.5 C
+0.26 C
1966
1.2 C
-1.05 C
1967
2.0 C
-0.29 C
1968
2.7 C
+0.39 C
1969
1.4 C
-0.86 C
1970
1.3 C
-0.93 C
1971
1.7 C
-0.62 C
1972
0.9 C
-1.40 C
1973
2.7 C
+0.47 C
1974
2.1 C
-0.19 C
1975
1.7 C
-0.56 C
1976
3.7 C
+1.41 C
1977
3.6 C
+1.31 C
1978
2.0 C
-0.25 C
1979
1.5 C
-0.82 C
1980
3.3 C
+1.06 C
1981
4.8 C
+2.48 C
1982
0.9 C
-1.34 C
1983
2.9 C
+0.64 C
The fitted trend in annual mean temperature here over 1924 to 1983 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.4) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Dundurn
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.2 to 0.4) per decade
1924 to 1983
54
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.1) per decade
1924 to 1983
54
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.1 to 0.6) per decade
1924 to 1983
54
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
1922 to 1983
Yearly extremes at Dundurn: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1941
36.1 C (97.0 F)
61
Coldest night (TNn)
-47.8 C (-54.0 F)
1936
-40.0 C (-40.0 F)
61
Wettest day (Rx1day)
122.2 mm (4.8 in)
1970
34.9 mm (1.4 in)
62
Wettest five days (Rx5day)
145.2 mm (5.7 in)
1925
50.8 mm (2.0 in)
62
Longest dry spell (CDD)
72 days
1976
30 days
62
Hottest day (TXx)
The hottest day of the year at Dundurn, 1922 to 1983. The record is 41.7 C (107.1 F) in 1941, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Dundurn by year
Year
Hottest day (TXx)
1922
n/a
1923
31.1 C (88.0 F)
1924
33.9 C (93.0 F)
1925
32.8 C (91.0 F)
1926
35.0 C (95.0 F)
1927
31.7 C (89.1 F)
1928
34.4 C (93.9 F)
1929
36.7 C (98.1 F)
1930
37.2 C (99.0 F)
1931
38.3 C (100.9 F)
1932
36.1 C (97.0 F)
1933
39.4 C (102.9 F)
1934
36.7 C (98.1 F)
1935
36.1 C (97.0 F)
1936
37.8 C (100.0 F)
1937
39.4 C (102.9 F)
1938
34.4 C (93.9 F)
1939
37.2 C (99.0 F)
1940
36.7 C (98.1 F)
1941
41.7 C (107.1 F)
1942
32.2 C (90.0 F)
1943
37.2 C (99.0 F)
1944
36.1 C (97.0 F)
1945
36.1 C (97.0 F)
1946
40.6 C (105.1 F)
1947
38.3 C (100.9 F)
1948
35.6 C (96.1 F)
1949
38.3 C (100.9 F)
1950
36.1 C (97.0 F)
1951
35.6 C (96.1 F)
1952
35.0 C (95.0 F)
1953
36.7 C (98.1 F)
1954
33.3 C (91.9 F)
1955
36.7 C (98.1 F)
1956
36.7 C (98.1 F)
1957
37.8 C (100.0 F)
1958
36.7 C (98.1 F)
1959
38.9 C (102.0 F)
1960
37.8 C (100.0 F)
1961
40.0 C (104.0 F)
1962
37.2 C (99.0 F)
1963
36.1 C (97.0 F)
1964
37.8 C (100.0 F)
1965
35.6 C (96.1 F)
1966
33.3 C (91.9 F)
1967
36.1 C (97.0 F)
1968
33.9 C (93.0 F)
1969
35.0 C (95.0 F)
1970
34.4 C (93.9 F)
1971
35.6 C (96.1 F)
1972
36.1 C (97.0 F)
1973
35.6 C (96.1 F)
1974
34.4 C (93.9 F)
1975
37.2 C (99.0 F)
1976
36.7 C (98.1 F)
1977
33.9 C (93.0 F)
1978
36.5 C (97.7 F)
1979
35.0 C (95.0 F)
1980
37.0 C (98.6 F)
1981
33.5 C (92.3 F)
1982
31.5 C (88.7 F)
1983
35.5 C (95.9 F)
Coldest night (TNn)
The coldest night of the year at Dundurn, 1922 to 1983. The record is -47.8 C (-54.0 F) in 1936, marked on the chart; the median year is -40.0 C (-40.0 F).
Coldest night (TNn) at Dundurn by year
Year
Coldest night (TNn)
1922
n/a
1923
-37.2 C (-35.0 F)
1924
-42.2 C (-44.0 F)
1925
-38.3 C (-36.9 F)
1926
-37.2 C (-35.0 F)
1927
-43.3 C (-45.9 F)
1928
-40.6 C (-41.1 F)
1929
-43.9 C (-47.0 F)
1930
-43.9 C (-47.0 F)
1931
-31.1 C (-24.0 F)
1932
-38.9 C (-38.0 F)
1933
-40.0 C (-40.0 F)
1934
-42.2 C (-44.0 F)
1935
-44.4 C (-47.9 F)
1936
-47.8 C (-54.0 F)
1937
-42.8 C (-45.0 F)
1938
-41.1 C (-42.0 F)
1939
-43.9 C (-47.0 F)
1940
-41.1 C (-42.0 F)
1941
-41.1 C (-42.0 F)
1942
-41.1 C (-42.0 F)
1943
-47.2 C (-53.0 F)
1944
-40.6 C (-41.1 F)
1945
-37.8 C (-36.0 F)
1946
-40.0 C (-40.0 F)
1947
-44.4 C (-47.9 F)
1948
-38.9 C (-38.0 F)
1949
-41.7 C (-43.1 F)
1950
-11.7 C (10.9 F)
1951
-14.4 C (6.1 F)
1952
-23.9 C (-11.0 F)
1953
-38.9 C (-38.0 F)
1954
-43.3 C (-45.9 F)
1955
-38.9 C (-38.0 F)
1956
-40.0 C (-40.0 F)
1957
-35.0 C (-31.0 F)
1958
-34.4 C (-29.9 F)
1959
-37.8 C (-36.0 F)
1960
-35.6 C (-32.1 F)
1961
-37.8 C (-36.0 F)
1962
-43.3 C (-45.9 F)
1963
-38.9 C (-38.0 F)
1964
-37.2 C (-35.0 F)
1965
-39.4 C (-38.9 F)
1966
-41.7 C (-43.1 F)
1967
-39.4 C (-38.9 F)
1968
-41.1 C (-42.0 F)
1969
-43.3 C (-45.9 F)
1970
-38.9 C (-38.0 F)
1971
-40.0 C (-40.0 F)
1972
-44.4 C (-47.9 F)
1973
-38.9 C (-38.0 F)
1974
-41.1 C (-42.0 F)
1975
-37.8 C (-36.0 F)
1976
-37.2 C (-35.0 F)
1977
-40.0 C (-40.0 F)
1978
-38.3 C (-36.9 F)
1979
-40.0 C (-40.0 F)
1980
-37.5 C (-35.5 F)
1981
-35.5 C (-31.9 F)
1982
-40.0 C (-40.0 F)
1983
-43.0 C (-45.4 F)
Wettest day (Rx1day)
The wettest day of the year at Dundurn, 1922 to 1983. The record is 122.2 mm (4.8 in) in 1970, marked on the chart; the median year is 34.9 mm (1.4 in).
Wettest day (Rx1day) at Dundurn by year
Year
Wettest day (Rx1day)
1922
54.9 mm (2.2 in)
1923
42.4 mm (1.7 in)
1924
39.4 mm (1.6 in)
1925
82.6 mm (3.3 in)
1926
26.9 mm (1.1 in)
1927
33.0 mm (1.3 in)
1928
49.5 mm (1.9 in)
1929
35.8 mm (1.4 in)
1930
25.4 mm (1.0 in)
1931
37.6 mm (1.5 in)
1932
20.3 mm (0.8 in)
1933
31.8 mm (1.3 in)
1934
24.6 mm (1.0 in)
1935
31.8 mm (1.3 in)
1936
37.1 mm (1.5 in)
1937
17.3 mm (0.7 in)
1938
36.3 mm (1.4 in)
1939
74.9 mm (2.9 in)
1940
40.6 mm (1.6 in)
1941
21.6 mm (0.9 in)
1942
43.2 mm (1.7 in)
1943
21.1 mm (0.8 in)
1944
31.5 mm (1.2 in)
1945
46.7 mm (1.8 in)
1946
26.9 mm (1.1 in)
1947
23.6 mm (0.9 in)
1948
16.3 mm (0.6 in)
1949
37.1 mm (1.5 in)
1950
36.1 mm (1.4 in)
1951
29.5 mm (1.2 in)
1952
22.4 mm (0.9 in)
1953
52.1 mm (2.1 in)
1954
37.1 mm (1.5 in)
1955
24.9 mm (1.0 in)
1956
25.9 mm (1.0 in)
1957
24.9 mm (1.0 in)
1958
51.3 mm (2.0 in)
1959
42.4 mm (1.7 in)
1960
39.4 mm (1.6 in)
1961
18.0 mm (0.7 in)
1962
40.4 mm (1.6 in)
1963
28.4 mm (1.1 in)
1964
23.1 mm (0.9 in)
1965
25.1 mm (1.0 in)
1966
27.4 mm (1.1 in)
1967
26.2 mm (1.0 in)
1968
33.8 mm (1.3 in)
1969
32.8 mm (1.3 in)
1970
122.2 mm (4.8 in)
1971
48.3 mm (1.9 in)
1972
19.6 mm (0.8 in)
1973
37.6 mm (1.5 in)
1974
40.6 mm (1.6 in)
1975
25.4 mm (1.0 in)
1976
47.0 mm (1.9 in)
1977
34.0 mm (1.3 in)
1978
18.5 mm (0.7 in)
1979
38.0 mm (1.5 in)
1980
41.6 mm (1.6 in)
1981
69.0 mm (2.7 in)
1982
40.0 mm (1.6 in)
1983
52.3 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Dundurn, 1922 to 1983. The record is 145.2 mm (5.7 in) in 1925, marked on the chart; the median year is 50.8 mm (2.0 in).
Wettest five days (Rx5day) at Dundurn by year
Year
Wettest five days (Rx5day)
1922
54.9 mm (2.2 in)
1923
100.8 mm (4.0 in)
1924
39.4 mm (1.6 in)
1925
145.2 mm (5.7 in)
1926
34.8 mm (1.4 in)
1927
51.8 mm (2.0 in)
1928
75.9 mm (3.0 in)
1929
38.6 mm (1.5 in)
1930
45.0 mm (1.8 in)
1931
57.2 mm (2.3 in)
1932
24.9 mm (1.0 in)
1933
35.6 mm (1.4 in)
1934
30.5 mm (1.2 in)
1935
45.4 mm (1.8 in)
1936
50.6 mm (2.0 in)
1937
26.2 mm (1.0 in)
1938
53.8 mm (2.1 in)
1939
90.9 mm (3.6 in)
1940
45.2 mm (1.8 in)
1941
38.9 mm (1.5 in)
1942
96.7 mm (3.8 in)
1943
44.8 mm (1.8 in)
1944
44.2 mm (1.7 in)
1945
50.8 mm (2.0 in)
1946
32.0 mm (1.3 in)
1947
46.7 mm (1.8 in)
1948
27.9 mm (1.1 in)
1949
52.3 mm (2.1 in)
1950
48.2 mm (1.9 in)
1951
50.8 mm (2.0 in)
1952
27.4 mm (1.1 in)
1953
61.2 mm (2.4 in)
1954
57.0 mm (2.2 in)
1955
36.4 mm (1.4 in)
1956
28.2 mm (1.1 in)
1957
37.1 mm (1.5 in)
1958
81.0 mm (3.2 in)
1959
75.9 mm (3.0 in)
1960
62.3 mm (2.5 in)
1961
23.0 mm (0.9 in)
1962
67.6 mm (2.7 in)
1963
41.2 mm (1.6 in)
1964
43.7 mm (1.7 in)
1965
73.4 mm (2.9 in)
1966
54.6 mm (2.1 in)
1967
43.3 mm (1.7 in)
1968
63.5 mm (2.5 in)
1969
66.7 mm (2.6 in)
1970
131.8 mm (5.2 in)
1971
79.2 mm (3.1 in)
1972
21.4 mm (0.8 in)
1973
63.7 mm (2.5 in)
1974
48.0 mm (1.9 in)
1975
67.1 mm (2.6 in)
1976
55.6 mm (2.2 in)
1977
55.6 mm (2.2 in)
1978
33.8 mm (1.3 in)
1979
48.4 mm (1.9 in)
1980
63.5 mm (2.5 in)
1981
91.0 mm (3.6 in)
1982
71.0 mm (2.8 in)
1983
78.4 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Dundurn, 1922 to 1983. The record is 72 days in 1976, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Dundurn by year
Year
Longest dry spell (CDD)
1922
25 days
1923
29 days
1924
16 days
1925
27 days
1926
23 days
1927
19 days
1928
34 days
1929
28 days
1930
43 days
1931
36 days
1932
29 days
1933
30 days
1934
45 days
1935
31 days
1936
40 days
1937
20 days
1938
26 days
1939
21 days
1940
38 days
1941
23 days
1942
41 days
1943
25 days
1944
35 days
1945
40 days
1946
51 days
1947
39 days
1948
37 days
1949
23 days
1950
14 days
1951
12 days
1952
29 days
1953
37 days
1954
31 days
1955
28 days
1956
22 days
1957
23 days
1958
34 days
1959
30 days
1960
43 days
1961
51 days
1962
28 days
1963
27 days
1964
26 days
1965
27 days
1966
37 days
1967
32 days
1968
40 days
1969
24 days
1970
28 days
1971
33 days
1972
27 days
1973
27 days
1974
38 days
1975
25 days
1976
72 days
1977
32 days
1978
33 days
1979
40 days
1980
45 days
1981
38 days
1982
28 days
1983
24 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
54 years with a frost
Across 54 years with a frost, the median last spring frost at Dundurn falls on 23 May and the median first autumn frost on 9 September, which leaves a median of 104 days between them.
Fitted over all years, the growing season changes by +4.7 days per decade at this station.
Frost dates and growing season at Dundurn
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
23 May
n/a
20 May
n/a
-2.8 days per decade
First autumn frost
9 September
n/a
12 September
n/a
+1.9 days per decade
Growing days
104 days
n/a
111 days
n/a
+4.7 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
55 years, 1923 to 1983
A day with at least 33.1 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 102.1 mm (4.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Dundurn: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
33.1 mm (1.3 in)
5 years
47.0 mm (1.9 in)
10 years
57.9 mm (2.3 in)
25 years
73.6 mm (2.9 in)
50 years
87.1 mm (3.4 in)
100 years
102.1 mm (4.0 in)
Longer than the 55 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, 55 years of values from 1923 to 1983.
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: 122.2 mm (4.8 in) in 1970; 82.6 mm (3.3 in) in 1925; 74.9 mm (2.9 in) in 1939.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Dundurn, at 1932. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1932 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Dundurn, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1932
+0.3
+0.6
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 Dundurn standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dundurn 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.