Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Souris. 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 Souris, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
6.7 C (44.1 F)
-46.7 C (-52.1 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-45.0 C (-49.0 F)
n/a
n/a
Mar
21.1 C (70.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-26.7 C (-16.1 F)
n/a
n/a
May
38.3 C (100.9 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
41.7 C (107.1 F)
1.1 C (34.0 F)
n/a
n/a
Aug
38.3 C (100.9 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Dec
14.4 C (57.9 F)
-40.0 C (-40.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Souris still stand. 1936 holds the most, with 60.
Standing records at Souris by the year they were set
Year set
Standing records
1913
28
1914
27
1915
26
1916
29
1917
45
1918
39
1919
51
1920
24
1921
19
1922
19
1923
28
1924
21
1925
20
1926
27
1927
23
1928
25
1929
24
1930
15
1931
33
1932
26
1933
21
1934
36
1935
22
1936
60
1937
22
1938
21
1939
34
1940
27
1941
22
1942
33
1943
22
1944
14
1945
21
1946
20
1947
23
1948
17
1949
21
1950
23
1951
22
1952
26
1953
24
1954
25
1955
12
1956
24
1957
11
1958
33
1959
21
1960
10
1961
22
1962
37
1963
35
1964
29
1965
20
1966
24
1967
29
1968
26
1969
15
1970
3
1972
8
All-Time Record Progression
5 new records
5 all-time records were set at Souris between 7 June 1954 and 3 August 1969. Each dot is a new record.
When Souris set new all-time records
Date
Kind
Detail
1954-06-07
Record daily precipitation
Record daily precipitation 82.6 mm (3.3 in)
1960-05-25
Record daily precipitation
Record daily precipitation 102.9 mm (4.1 in)
1962-03-01
Record low minimum temperature
Record low minimum temperature -45.6 C (-50.1 F)
1966-01-07
Record low minimum temperature
Record low minimum temperature -46.7 C (-52.1 F)
1969-08-03
Record high minimum temperature
Record high minimum temperature 24.4 C (75.9 F)
Wettest Day of Each Month
May: 102.9 mm (4.1 in)
The wettest day on record for each calendar month at Souris. The most was 102.9 mm (4.1 in) on 25 May 1960.
Record daily precipitation for each month at Souris
Month
Record daily precipitation (mm)
Date
Jan
30.5 mm (1.2 in)
12 January 1935
Feb
63.5 mm (2.5 in)
26 February 1969
Mar
45.7 mm (1.8 in)
6 March 1935
Apr
43.2 mm (1.7 in)
3 April 1940
May
102.9 mm (4.1 in)
25 May 1960
Jun
82.6 mm (3.3 in)
7 June 1954
Jul
76.2 mm (3.0 in)
20 July 1965
Aug
91.7 mm (3.6 in)
15 August 1968
Sep
50.8 mm (2.0 in)
16 September 1933
Oct
41.4 mm (1.6 in)
4 October 1937
Nov
35.3 mm (1.4 in)
8 November 1915
Dec
30.5 mm (1.2 in)
25 December 1938
Period of Record Coverage
1912 to 1972
Complete yearUnder 90 percent of days
60 years of record at Souris, 1912 to 1972. 8 years have data for under 90 percent of days and are left out of rankings: 1912, 1913, 1914, 1930, 1955, 1969, 1970, 1972.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Souris, 1915 to 1968. Blue stripes are years cooler than the station's own mean of 2.3 C (36.2 F); red stripes are warmer. The coolest year was 1916, at 0.2 C (32.3 F), and the warmest was 1931, at 4.8 C (40.6 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Souris as warming stripes, 1915 to 1968
Year
Annual mean temperature
Difference from the station mean
1915
2.8 C
+0.41 C
1916
0.2 C
-2.20 C
1917
0.6 C
-1.71 C
1918
2.6 C
+0.22 C
1919
1.5 C
-0.86 C
1920
2.2 C
-0.16 C
1921
3.7 C
+1.35 C
1922
2.8 C
+0.42 C
1923
2.5 C
+0.16 C
1924
1.4 C
-1.00 C
1925
2.5 C
+0.19 C
1926
2.6 C
+0.24 C
1927
1.2 C
-1.16 C
1928
3.1 C
+0.74 C
1929
1.3 C
-1.04 C
1931
4.8 C
+2.42 C
1932
2.3 C
-0.07 C
1933
2.2 C
-0.18 C
1934
3.8 C
+1.44 C
1935
1.4 C
-0.99 C
1936
1.1 C
-1.27 C
1938
3.8 C
+1.49 C
1939
3.4 C
+1.09 C
1940
3.6 C
+1.22 C
1941
3.7 C
+1.36 C
1942
3.2 C
+0.87 C
1943
2.3 C
-0.01 C
1944
3.5 C
+1.10 C
1945
2.0 C
-0.32 C
1946
2.7 C
+0.30 C
1948
2.3 C
-0.01 C
1949
2.4 C
+0.02 C
1950
0.3 C
-2.02 C
1951
0.9 C
-1.48 C
1952
3.8 C
+1.40 C
1954
3.3 C
+0.93 C
1956
1.9 C
-0.49 C
1957
2.1 C
-0.24 C
1958
2.1 C
-0.26 C
1960
1.9 C
-0.50 C
1961
2.3 C
-0.04 C
1962
2.1 C
-0.26 C
1963
3.0 C
+0.66 C
1964
1.8 C
-0.56 C
1965
0.9 C
-1.49 C
1967
2.3 C
-0.07 C
1968
2.6 C
+0.28 C
The fitted trend in annual mean temperature here over 1915 to 1968 is 0.01 C (-0.19 to 0.20) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.33 to 0.35) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Souris
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.19 to 0.20) per decade
0.01 F (-0.33 to 0.35) per decade
1915 to 1968
47
Not clearly different from zero
Mean daily maximum
0.1 C (-0.2 to 0.3) per decade
0.1 F (-0.3 to 0.6) per decade
1915 to 1968
47
Not clearly different from zero
Mean daily minimum
-0.1 C (-0.3 to 0.1) per decade
-0.1 F (-0.5 to 0.2) per decade
1915 to 1968
47
Not clearly different from zero
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
1912 to 1972
Yearly extremes at Souris: 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)
1931
35.6 C (96.1 F)
60
Coldest night (TNn)
-46.7 C (-52.1 F)
1966
-38.9 C (-38.0 F)
60
Wettest day (Rx1day)
102.9 mm (4.1 in)
1960
37.5 mm (1.5 in)
60
Wettest five days (Rx5day)
144.7 mm (5.7 in)
1965
57.6 mm (2.3 in)
60
Longest dry spell (CDD)
56 days
1938
28 days
60
Hottest day (TXx)
The hottest day of the year at Souris, 1912 to 1972. The record is 41.7 C (107.1 F) in 1931, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Souris by year
Year
Hottest day (TXx)
1912
22.2 C (72.0 F)
1913
33.9 C (93.0 F)
1914
33.9 C (93.0 F)
1915
33.3 C (91.9 F)
1916
33.9 C (93.0 F)
1917
36.1 C (97.0 F)
1918
38.3 C (100.9 F)
1919
36.7 C (98.1 F)
1920
36.1 C (97.0 F)
1921
35.6 C (96.1 F)
1922
36.7 C (98.1 F)
1923
34.4 C (93.9 F)
1924
32.2 C (90.0 F)
1925
35.0 C (95.0 F)
1926
36.7 C (98.1 F)
1927
30.6 C (87.1 F)
1928
35.6 C (96.1 F)
1929
38.9 C (102.0 F)
1930
36.7 C (98.1 F)
1931
41.7 C (107.1 F)
1932
34.4 C (93.9 F)
1933
38.3 C (100.9 F)
1934
38.3 C (100.9 F)
1935
36.1 C (97.0 F)
1936
41.7 C (107.1 F)
1937
37.2 C (99.0 F)
1938
35.6 C (96.1 F)
1939
37.2 C (99.0 F)
1940
36.7 C (98.1 F)
1941
39.4 C (102.9 F)
1942
32.2 C (90.0 F)
1943
34.4 C (93.9 F)
1944
32.2 C (90.0 F)
1945
36.1 C (97.0 F)
1946
35.0 C (95.0 F)
1947
34.4 C (93.9 F)
1948
35.0 C (95.0 F)
1949
36.1 C (97.0 F)
1950
31.7 C (89.1 F)
1951
37.2 C (99.0 F)
1952
36.7 C (98.1 F)
1953
33.3 C (91.9 F)
1954
32.2 C (90.0 F)
1955
35.6 C (96.1 F)
1956
36.1 C (97.0 F)
1957
34.4 C (93.9 F)
1958
34.4 C (93.9 F)
1959
35.6 C (96.1 F)
1960
33.9 C (93.0 F)
1961
36.1 C (97.0 F)
1962
32.2 C (90.0 F)
1963
35.6 C (96.1 F)
1964
32.8 C (91.0 F)
1965
34.4 C (93.9 F)
1966
33.3 C (91.9 F)
1967
35.6 C (96.1 F)
1968
34.4 C (93.9 F)
1969
36.1 C (97.0 F)
1970
35.0 C (95.0 F)
1972
27.8 C (82.0 F)
Coldest night (TNn)
The coldest night of the year at Souris, 1912 to 1972. The record is -46.7 C (-52.1 F) in 1966, marked on the chart; the median year is -38.9 C (-38.0 F).
Coldest night (TNn) at Souris by year
Year
Coldest night (TNn)
1912
-32.2 C (-26.0 F)
1913
-37.8 C (-36.0 F)
1914
-42.8 C (-45.0 F)
1915
-41.1 C (-42.0 F)
1916
-44.4 C (-47.9 F)
1917
-43.3 C (-45.9 F)
1918
-38.9 C (-38.0 F)
1919
-38.3 C (-36.9 F)
1920
-38.9 C (-38.0 F)
1921
-35.6 C (-32.1 F)
1922
-39.4 C (-38.9 F)
1923
-37.8 C (-36.0 F)
1924
-37.2 C (-35.0 F)
1925
-35.6 C (-32.1 F)
1926
-35.6 C (-32.1 F)
1927
-38.9 C (-38.0 F)
1928
-33.3 C (-27.9 F)
1929
-41.7 C (-43.1 F)
1930
-41.7 C (-43.1 F)
1931
-30.0 C (-22.0 F)
1932
-37.2 C (-35.0 F)
1933
-38.9 C (-38.0 F)
1934
-39.4 C (-38.9 F)
1935
-40.6 C (-41.1 F)
1936
-45.0 C (-49.0 F)
1937
-36.1 C (-33.0 F)
1938
-38.9 C (-38.0 F)
1939
-41.1 C (-42.0 F)
1940
-36.7 C (-34.1 F)
1941
-37.8 C (-36.0 F)
1942
-34.4 C (-29.9 F)
1943
-42.8 C (-45.0 F)
1944
-36.1 C (-33.0 F)
1945
-36.1 C (-33.0 F)
1946
-37.2 C (-35.0 F)
1947
-35.6 C (-32.1 F)
1948
-38.9 C (-38.0 F)
1949
-41.7 C (-43.1 F)
1950
-41.1 C (-42.0 F)
1951
-39.4 C (-38.9 F)
1952
-36.1 C (-33.0 F)
1953
-34.4 C (-29.9 F)
1954
-40.6 C (-41.1 F)
1955
-40.6 C (-41.1 F)
1956
-39.4 C (-38.9 F)
1957
-37.2 C (-35.0 F)
1958
-41.1 C (-42.0 F)
1959
-40.6 C (-41.1 F)
1960
-37.8 C (-36.0 F)
1961
-42.8 C (-45.0 F)
1962
-45.6 C (-50.1 F)
1963
-37.8 C (-36.0 F)
1964
-38.3 C (-36.9 F)
1965
-42.8 C (-45.0 F)
1966
-46.7 C (-52.1 F)
1967
-41.1 C (-42.0 F)
1968
-40.0 C (-40.0 F)
1969
-38.9 C (-38.0 F)
1970
-7.8 C (18.0 F)
1972
-17.8 C (0.0 F)
Wettest day (Rx1day)
The wettest day of the year at Souris, 1912 to 1972. The record is 102.9 mm (4.1 in) in 1960, marked on the chart; the median year is 37.5 mm (1.5 in).
Wettest day (Rx1day) at Souris by year
Year
Wettest day (Rx1day)
1912
7.6 mm (0.30 in)
1913
21.6 mm (0.9 in)
1914
45.5 mm (1.8 in)
1915
35.3 mm (1.4 in)
1916
35.1 mm (1.4 in)
1917
30.5 mm (1.2 in)
1918
28.2 mm (1.1 in)
1919
42.2 mm (1.7 in)
1920
31.0 mm (1.2 in)
1921
35.8 mm (1.4 in)
1922
32.3 mm (1.3 in)
1923
30.5 mm (1.2 in)
1924
31.8 mm (1.3 in)
1925
58.4 mm (2.3 in)
1926
34.5 mm (1.4 in)
1927
39.4 mm (1.6 in)
1928
26.4 mm (1.0 in)
1929
37.1 mm (1.5 in)
1930
25.4 mm (1.0 in)
1931
64.3 mm (2.5 in)
1932
33.0 mm (1.3 in)
1933
50.8 mm (2.0 in)
1934
24.6 mm (1.0 in)
1935
70.1 mm (2.8 in)
1936
61.7 mm (2.4 in)
1937
67.8 mm (2.7 in)
1938
50.8 mm (2.0 in)
1939
35.1 mm (1.4 in)
1940
43.2 mm (1.7 in)
1941
37.8 mm (1.5 in)
1942
30.7 mm (1.2 in)
1943
28.4 mm (1.1 in)
1944
56.6 mm (2.2 in)
1945
56.9 mm (2.2 in)
1946
41.9 mm (1.6 in)
1947
53.1 mm (2.1 in)
1948
50.3 mm (2.0 in)
1949
43.2 mm (1.7 in)
1950
50.0 mm (2.0 in)
1951
24.9 mm (1.0 in)
1952
35.3 mm (1.4 in)
1953
23.1 mm (0.9 in)
1954
82.6 mm (3.3 in)
1955
32.5 mm (1.3 in)
1956
71.4 mm (2.8 in)
1957
55.9 mm (2.2 in)
1958
31.8 mm (1.3 in)
1959
54.6 mm (2.1 in)
1960
102.9 mm (4.1 in)
1961
30.0 mm (1.2 in)
1962
64.8 mm (2.6 in)
1963
42.2 mm (1.7 in)
1964
54.6 mm (2.1 in)
1965
76.2 mm (3.0 in)
1966
33.0 mm (1.3 in)
1967
23.1 mm (0.9 in)
1968
91.7 mm (3.6 in)
1969
63.5 mm (2.5 in)
1970
26.2 mm (1.0 in)
1972
7.6 mm (0.30 in)
Wettest five days (Rx5day)
The wettest five days of the year at Souris, 1912 to 1972. The record is 144.7 mm (5.7 in) in 1965, marked on the chart; the median year is 57.6 mm (2.3 in).
Wettest five days (Rx5day) at Souris by year
Year
Wettest five days (Rx5day)
1912
18.0 mm (0.7 in)
1913
25.7 mm (1.0 in)
1914
47.0 mm (1.9 in)
1915
40.4 mm (1.6 in)
1916
61.2 mm (2.4 in)
1917
33.0 mm (1.3 in)
1918
47.7 mm (1.9 in)
1919
50.0 mm (2.0 in)
1920
33.8 mm (1.3 in)
1921
47.8 mm (1.9 in)
1922
46.7 mm (1.8 in)
1923
60.9 mm (2.4 in)
1924
53.6 mm (2.1 in)
1925
90.9 mm (3.6 in)
1926
48.0 mm (1.9 in)
1927
56.6 mm (2.2 in)
1928
49.5 mm (1.9 in)
1929
55.9 mm (2.2 in)
1930
43.9 mm (1.7 in)
1931
91.2 mm (3.6 in)
1932
67.5 mm (2.7 in)
1933
76.7 mm (3.0 in)
1934
47.9 mm (1.9 in)
1935
143.5 mm (5.6 in)
1936
67.8 mm (2.7 in)
1937
86.4 mm (3.4 in)
1938
61.0 mm (2.4 in)
1939
58.5 mm (2.3 in)
1940
58.7 mm (2.3 in)
1941
86.8 mm (3.4 in)
1942
37.6 mm (1.5 in)
1943
44.1 mm (1.7 in)
1944
104.4 mm (4.1 in)
1945
93.4 mm (3.7 in)
1946
53.8 mm (2.1 in)
1947
80.2 mm (3.2 in)
1948
95.8 mm (3.8 in)
1949
66.3 mm (2.6 in)
1950
54.9 mm (2.2 in)
1951
26.2 mm (1.0 in)
1952
49.5 mm (1.9 in)
1953
48.2 mm (1.9 in)
1954
131.3 mm (5.2 in)
1955
51.2 mm (2.0 in)
1956
121.9 mm (4.8 in)
1957
66.3 mm (2.6 in)
1958
50.3 mm (2.0 in)
1959
93.0 mm (3.7 in)
1960
122.5 mm (4.8 in)
1961
51.9 mm (2.0 in)
1962
73.7 mm (2.9 in)
1963
59.5 mm (2.3 in)
1964
81.8 mm (3.2 in)
1965
144.7 mm (5.7 in)
1966
86.3 mm (3.4 in)
1967
34.9 mm (1.4 in)
1968
110.1 mm (4.3 in)
1969
69.9 mm (2.8 in)
1970
47.2 mm (1.9 in)
1972
10.1 mm (0.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Souris, 1912 to 1972. The record is 56 days in 1938, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Souris by year
Year
Longest dry spell (CDD)
1912
24 days
1913
34 days
1914
43 days
1915
35 days
1916
17 days
1917
27 days
1918
22 days
1919
23 days
1920
19 days
1921
14 days
1922
23 days
1923
33 days
1924
22 days
1925
22 days
1926
16 days
1927
27 days
1928
55 days
1929
19 days
1930
20 days
1931
40 days
1932
24 days
1933
30 days
1934
29 days
1935
29 days
1936
36 days
1937
29 days
1938
56 days
1939
20 days
1940
46 days
1941
15 days
1942
19 days
1943
37 days
1944
27 days
1945
24 days
1946
30 days
1947
32 days
1948
44 days
1949
37 days
1950
17 days
1951
23 days
1952
30 days
1953
36 days
1954
35 days
1955
19 days
1956
21 days
1957
24 days
1958
35 days
1959
38 days
1960
26 days
1961
54 days
1962
27 days
1963
30 days
1964
29 days
1965
31 days
1966
28 days
1967
25 days
1968
44 days
1969
30 days
1970
17 days
1972
15 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
47 years with a frost
Across 47 years with a frost, the median last spring frost at Souris falls on 27 May and the median first autumn frost on 12 September, which leaves a median of 110 days between them.
Fitted over all years, the growing season changes by -0.3 days per decade at this station.
Frost dates and growing season at Souris
Measure
Median, all years
Earliest period
Recent period (1933 to 1968)
Recent against earliest
Fitted trend
Last spring frost
27 May
n/a
29 May
n/a
+0.4 days per decade
First autumn frost
12 September
n/a
13 September
n/a
0.0 days per decade
Growing days
110 days
n/a
110 days
n/a
-0.3 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
38 years, 1915 to 1968
A day with at least 40.0 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 130.3 mm (5.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Souris: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
40.0 mm (1.6 in)
5 years
57.5 mm (2.3 in)
10 years
71.3 mm (2.8 in)
25 years
92.0 mm (3.6 in)
50 years
109.9 mm (4.3 in)
Longer than the 38 years of record
100 years
130.3 mm (5.1 in)
Longer than the 38 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, 38 years of values from 1915 to 1968.
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: 102.9 mm (4.1 in) in 1960; 91.7 mm (3.6 in) in 1968; 82.6 mm (3.3 in) in 1954.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Souris, at 1957. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1957 ran 0.5 C (0.9 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Souris, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1957
-0.5
-0.9
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 Souris standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Souris 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.