Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Cochrane. 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 Cochrane, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
7.2 C (45.0 F)
-47.0 C (-52.6 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-45.6 C (-50.1 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-31.1 C (-24.0 F)
n/a
n/a
May
33.9 C (93.0 F)
-13.9 C (7.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
37.2 C (99.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
36.1 C (97.0 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-16.0 C (3.2 F)
n/a
n/a
Nov
20.0 C (68.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Dec
13.0 C (55.4 F)
-45.6 C (-50.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Cochrane still stand. 1964 holds the most, with 37.
Standing records at Cochrane by the year they were set
Year set
Standing records
1910
8
1911
15
1912
22
1913
25
1914
24
1915
23
1916
5
1917
13
1918
19
1919
25
1920
26
1921
24
1922
14
1923
25
1924
11
1925
20
1926
16
1927
15
1928
16
1929
23
1930
24
1931
22
1932
22
1933
26
1934
20
1935
17
1936
27
1937
21
1938
20
1939
15
1940
12
1941
21
1942
19
1943
17
1944
23
1945
28
1946
29
1947
18
1948
20
1949
11
1950
19
1951
14
1952
14
1953
14
1954
7
1955
9
1956
20
1957
10
1958
12
1959
12
1960
8
1961
17
1962
26
1963
23
1964
37
1965
27
1966
20
1967
29
1968
21
1969
15
1970
19
1971
12
1972
17
1973
18
1974
24
1975
28
1976
33
1977
27
1978
25
1979
19
1980
28
1981
31
1982
29
1983
19
All-Time Record Progression
7 new records
7 all-time records were set at Cochrane between 5 July 1947 and 19 March 1983. Each dot is a new record.
When Cochrane set new all-time records
Date
Kind
Detail
1947-07-05
Record daily precipitation
Record daily precipitation 65.3 mm (2.6 in)
1953-09-12
Record daily precipitation
Record daily precipitation 69.6 mm (2.7 in)
1962-05-29
Record daily precipitation
Record daily precipitation 87.1 mm (3.4 in)
1971-03-15
Record daily snowfall
Record daily snowfall 43.9 cm (17.3 in)
1981-01-03
Record low minimum temperature
Record low minimum temperature -46.0 C (-50.8 F)
1982-01-18
Record low minimum temperature
Record low minimum temperature -47.0 C (-52.6 F)
1983-03-19
Record daily snowfall
Record daily snowfall 86.2 cm (33.9 in)
Wettest Day of Each Month
May: 87.1 mm (3.4 in)
The wettest day on record for each calendar month at Cochrane. The most was 87.1 mm (3.4 in) on 29 May 1962.
Record daily precipitation for each month at Cochrane
Month
Record daily precipitation (mm)
Date
Jan
42.7 mm (1.7 in)
25 January 1938
Feb
35.6 mm (1.4 in)
2 February 1968
Mar
43.9 mm (1.7 in)
15 March 1971
Apr
48.3 mm (1.9 in)
26 April 1938
May
87.1 mm (3.4 in)
29 May 1962
Jun
49.3 mm (1.9 in)
30 June 1937
Jul
69.1 mm (2.7 in)
29 July 1954
Aug
61.7 mm (2.4 in)
29 August 1921
Sep
69.6 mm (2.7 in)
12 September 1953
Oct
50.8 mm (2.0 in)
22 October 1979
Nov
62.7 mm (2.5 in)
25 November 1950
Dec
30.5 mm (1.2 in)
9 December 1963
Period of Record Coverage
1910 to 1983
Complete yearUnder 90 percent of days
74 years of record at Cochrane, 1910 to 1983. 13 years have data for under 90 percent of days and are left out of rankings: 1910, 1911, 1916, 1926, 1927, 1947, 1952, 1954 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 52 complete years at Cochrane, 1912 to 1983. Blue stripes are years cooler than the station's own mean of 0.7 C (33.3 F); red stripes are warmer. The coolest year was 1917, at -1.2 C (29.9 F), and the warmest was 1931, at 3.2 C (37.7 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Cochrane as warming stripes, 1912 to 1983
Year
Annual mean temperature
Difference from the station mean
1912
0.0 C
-0.68 C
1913
0.8 C
+0.09 C
1914
0.5 C
-0.23 C
1915
2.2 C
+1.46 C
1917
-1.2 C
-1.88 C
1918
0.4 C
-0.37 C
1919
1.6 C
+0.83 C
1920
1.7 C
+1.00 C
1921
2.4 C
+1.70 C
1922
1.1 C
+0.41 C
1923
0.1 C
-0.61 C
1924
-0.4 C
-1.13 C
1925
-0.2 C
-0.94 C
1928
0.5 C
-0.19 C
1929
-0.3 C
-1.07 C
1930
1.7 C
+0.96 C
1931
3.2 C
+2.45 C
1932
1.4 C
+0.68 C
1933
0.3 C
-0.38 C
1934
0.1 C
-0.65 C
1935
0.4 C
-0.36 C
1936
-0.5 C
-1.26 C
1937
1.4 C
+0.68 C
1938
1.4 C
+0.66 C
1939
0.3 C
-0.40 C
1940
0.4 C
-0.34 C
1941
1.4 C
+0.63 C
1942
1.4 C
+0.63 C
1943
0.4 C
-0.33 C
1944
1.5 C
+0.75 C
1945
0.7 C
-0.02 C
1946
1.0 C
+0.25 C
1948
1.8 C
+1.08 C
1949
1.1 C
+0.36 C
1961
1.2 C
+0.48 C
1962
0.7 C
0.00 C
1963
0.7 C
-0.05 C
1964
0.7 C
+0.01 C
1965
-0.1 C
-0.87 C
1966
0.6 C
-0.15 C
1967
-0.2 C
-0.89 C
1968
0.9 C
+0.14 C
1971
0.9 C
+0.15 C
1974
-0.3 C
-1.01 C
1975
1.2 C
+0.44 C
1976
-0.8 C
-1.48 C
1977
1.7 C
+1.01 C
1978
-0.8 C
-1.52 C
1979
-0.1 C
-0.83 C
1981
1.5 C
+0.75 C
1982
0.4 C
-0.31 C
1983
1.2 C
+0.46 C
The fitted trend in annual mean temperature here over 1912 to 1983 is -0.04 C (-0.16 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Cochrane
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.04 C (-0.16 to 0.07) per decade
-0.1 F (-0.3 to 0.1) per decade
1912 to 1983
52
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1912 to 1983
52
Not clearly different from zero
Mean daily minimum
-0.15 C (-0.26 to -0.03) per decade
-0.3 F (-0.5 to -0.1) per decade
1912 to 1983
52
Fall
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
1910 to 1983
Yearly extremes at Cochrane: 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)
1912
32.2 C (90.0 F)
74
Coldest night (TNn)
-47.0 C (-52.6 F)
1982
-39.4 C (-38.9 F)
74
Wettest day (Rx1day)
87.1 mm (3.4 in)
1962
35.9 mm (1.4 in)
74
Wettest five days (Rx5day)
119.2 mm (4.7 in)
1953
61.3 mm (2.4 in)
74
Longest dry spell (CDD)
46 days
1926
16 days
74
Hottest day (TXx)
The hottest day of the year at Cochrane, 1910 to 1983. The record is 37.2 C (99.0 F) in 1912, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Cochrane by year
Year
Hottest day (TXx)
1910
32.8 C (91.0 F)
1911
33.9 C (93.0 F)
1912
37.2 C (99.0 F)
1913
35.0 C (95.0 F)
1914
35.0 C (95.0 F)
1915
32.2 C (90.0 F)
1916
28.9 C (84.0 F)
1917
32.2 C (90.0 F)
1918
31.7 C (89.1 F)
1919
33.9 C (93.0 F)
1920
30.6 C (87.1 F)
1921
37.2 C (99.0 F)
1922
30.6 C (87.1 F)
1923
32.2 C (90.0 F)
1924
31.1 C (88.0 F)
1925
30.6 C (87.1 F)
1926
33.9 C (93.0 F)
1927
36.7 C (98.1 F)
1928
31.1 C (88.0 F)
1929
32.2 C (90.0 F)
1930
31.1 C (88.0 F)
1931
36.1 C (97.0 F)
1932
32.2 C (90.0 F)
1933
32.2 C (90.0 F)
1934
29.4 C (84.9 F)
1935
32.8 C (91.0 F)
1936
35.0 C (95.0 F)
1937
32.8 C (91.0 F)
1938
32.2 C (90.0 F)
1939
31.7 C (89.1 F)
1940
31.1 C (88.0 F)
1941
33.9 C (93.0 F)
1942
31.7 C (89.1 F)
1943
34.4 C (93.9 F)
1944
32.8 C (91.0 F)
1945
30.6 C (87.1 F)
1946
30.6 C (87.1 F)
1947
32.2 C (90.0 F)
1948
32.2 C (90.0 F)
1949
35.6 C (96.1 F)
1950
35.0 C (95.0 F)
1951
32.2 C (90.0 F)
1952
33.9 C (93.0 F)
1953
32.8 C (91.0 F)
1954
30.6 C (87.1 F)
1955
33.3 C (91.9 F)
1956
33.9 C (93.0 F)
1957
31.7 C (89.1 F)
1958
30.6 C (87.1 F)
1959
30.6 C (87.1 F)
1960
29.4 C (84.9 F)
1961
29.4 C (84.9 F)
1962
32.2 C (90.0 F)
1963
34.4 C (93.9 F)
1964
33.3 C (91.9 F)
1965
33.3 C (91.9 F)
1966
32.2 C (90.0 F)
1967
30.0 C (86.0 F)
1968
31.7 C (89.1 F)
1969
31.7 C (89.1 F)
1970
31.7 C (89.1 F)
1971
31.7 C (89.1 F)
1972
30.6 C (87.1 F)
1973
30.6 C (87.1 F)
1974
32.2 C (90.0 F)
1975
37.2 C (99.0 F)
1976
34.4 C (93.9 F)
1977
35.5 C (95.9 F)
1978
34.0 C (93.2 F)
1979
32.5 C (90.5 F)
1980
33.0 C (91.4 F)
1981
34.0 C (93.2 F)
1982
32.0 C (89.6 F)
1983
33.0 C (91.4 F)
Coldest night (TNn)
The coldest night of the year at Cochrane, 1910 to 1983. The record is -47.0 C (-52.6 F) in 1982, marked on the chart; the median year is -39.4 C (-38.9 F).
Coldest night (TNn) at Cochrane by year
Year
Coldest night (TNn)
1910
-36.7 C (-34.1 F)
1911
-33.3 C (-27.9 F)
1912
-45.6 C (-50.1 F)
1913
-37.2 C (-35.0 F)
1914
-43.3 C (-45.9 F)
1915
-39.4 C (-38.9 F)
1916
-38.9 C (-38.0 F)
1917
-38.3 C (-36.9 F)
1918
-39.4 C (-38.9 F)
1919
-38.9 C (-38.0 F)
1920
-39.4 C (-38.9 F)
1921
-35.0 C (-31.0 F)
1922
-37.2 C (-35.0 F)
1923
-38.9 C (-38.0 F)
1924
-41.1 C (-42.0 F)
1925
-37.2 C (-35.0 F)
1926
-37.2 C (-35.0 F)
1927
-41.1 C (-42.0 F)
1928
-37.2 C (-35.0 F)
1929
-40.0 C (-40.0 F)
1930
-36.7 C (-34.1 F)
1931
-37.8 C (-36.0 F)
1932
-35.0 C (-31.0 F)
1933
-40.6 C (-41.1 F)
1934
-40.0 C (-40.0 F)
1935
-42.2 C (-44.0 F)
1936
-36.1 C (-33.0 F)
1937
-36.1 C (-33.0 F)
1938
-37.8 C (-36.0 F)
1939
-40.0 C (-40.0 F)
1940
-32.8 C (-27.0 F)
1941
-37.8 C (-36.0 F)
1942
-40.0 C (-40.0 F)
1943
-42.2 C (-44.0 F)
1944
-35.0 C (-31.0 F)
1945
-38.9 C (-38.0 F)
1946
-38.3 C (-36.9 F)
1947
-35.6 C (-32.1 F)
1948
-42.2 C (-44.0 F)
1949
-35.6 C (-32.1 F)
1950
-38.9 C (-38.0 F)
1951
-40.0 C (-40.0 F)
1952
-35.0 C (-31.0 F)
1953
-40.6 C (-41.1 F)
1954
-37.8 C (-36.0 F)
1955
-41.1 C (-42.0 F)
1956
-32.8 C (-27.0 F)
1957
-38.3 C (-36.9 F)
1958
-33.9 C (-29.0 F)
1959
-32.2 C (-26.0 F)
1960
-35.6 C (-32.1 F)
1961
-40.6 C (-41.1 F)
1962
-45.6 C (-50.1 F)
1963
-41.7 C (-43.1 F)
1964
-41.1 C (-42.0 F)
1965
-45.0 C (-49.0 F)
1966
-41.1 C (-42.0 F)
1967
-42.8 C (-45.0 F)
1968
-42.8 C (-45.0 F)
1969
-35.6 C (-32.1 F)
1970
-42.2 C (-44.0 F)
1971
-43.9 C (-47.0 F)
1972
-44.4 C (-47.9 F)
1973
-44.4 C (-47.9 F)
1974
-45.0 C (-49.0 F)
1975
-45.6 C (-50.1 F)
1976
-43.3 C (-45.9 F)
1977
-38.9 C (-38.0 F)
1978
-38.0 C (-36.4 F)
1979
-45.0 C (-49.0 F)
1980
-45.0 C (-49.0 F)
1981
-46.0 C (-50.8 F)
1982
-47.0 C (-52.6 F)
1983
-41.0 C (-41.8 F)
Wettest day (Rx1day)
The wettest day of the year at Cochrane, 1910 to 1983. The record is 87.1 mm (3.4 in) in 1962, marked on the chart; the median year is 35.9 mm (1.4 in).
Wettest day (Rx1day) at Cochrane by year
Year
Wettest day (Rx1day)
1910
27.2 mm (1.1 in)
1911
21.6 mm (0.9 in)
1912
35.6 mm (1.4 in)
1913
29.2 mm (1.1 in)
1914
38.6 mm (1.5 in)
1915
27.9 mm (1.1 in)
1916
26.9 mm (1.1 in)
1917
49.0 mm (1.9 in)
1918
41.1 mm (1.6 in)
1919
46.0 mm (1.8 in)
1920
44.2 mm (1.7 in)
1921
61.7 mm (2.4 in)
1922
37.8 mm (1.5 in)
1923
32.3 mm (1.3 in)
1924
28.7 mm (1.1 in)
1925
29.0 mm (1.1 in)
1926
28.4 mm (1.1 in)
1927
20.3 mm (0.8 in)
1928
42.2 mm (1.7 in)
1929
49.0 mm (1.9 in)
1930
31.2 mm (1.2 in)
1931
35.6 mm (1.4 in)
1932
35.3 mm (1.4 in)
1933
21.1 mm (0.8 in)
1934
32.5 mm (1.3 in)
1935
25.4 mm (1.0 in)
1936
25.1 mm (1.0 in)
1937
49.3 mm (1.9 in)
1938
48.3 mm (1.9 in)
1939
34.0 mm (1.3 in)
1940
28.7 mm (1.1 in)
1941
45.0 mm (1.8 in)
1942
47.0 mm (1.9 in)
1943
23.9 mm (0.9 in)
1944
44.5 mm (1.8 in)
1945
34.0 mm (1.3 in)
1946
56.4 mm (2.2 in)
1947
65.3 mm (2.6 in)
1948
62.2 mm (2.4 in)
1949
37.1 mm (1.5 in)
1950
62.7 mm (2.5 in)
1951
34.0 mm (1.3 in)
1952
27.7 mm (1.1 in)
1953
69.6 mm (2.7 in)
1954
69.1 mm (2.7 in)
1955
47.0 mm (1.9 in)
1956
36.1 mm (1.4 in)
1957
32.5 mm (1.3 in)
1958
28.4 mm (1.1 in)
1959
18.5 mm (0.7 in)
1960
33.5 mm (1.3 in)
1961
47.8 mm (1.9 in)
1962
87.1 mm (3.4 in)
1963
41.7 mm (1.6 in)
1964
32.5 mm (1.3 in)
1965
46.5 mm (1.8 in)
1966
35.3 mm (1.4 in)
1967
38.9 mm (1.5 in)
1968
35.6 mm (1.4 in)
1969
41.4 mm (1.6 in)
1970
43.9 mm (1.7 in)
1971
43.9 mm (1.7 in)
1972
40.4 mm (1.6 in)
1973
47.5 mm (1.9 in)
1974
62.0 mm (2.4 in)
1975
29.0 mm (1.1 in)
1976
25.4 mm (1.0 in)
1977
33.0 mm (1.3 in)
1978
22.8 mm (0.9 in)
1979
50.8 mm (2.0 in)
1980
55.6 mm (2.2 in)
1981
34.0 mm (1.3 in)
1982
40.2 mm (1.6 in)
1983
28.0 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Cochrane, 1910 to 1983. The record is 119.2 mm (4.7 in) in 1953, marked on the chart; the median year is 61.3 mm (2.4 in).
Wettest five days (Rx5day) at Cochrane by year
Year
Wettest five days (Rx5day)
1910
47.5 mm (1.9 in)
1911
21.6 mm (0.9 in)
1912
61.2 mm (2.4 in)
1913
53.1 mm (2.1 in)
1914
56.1 mm (2.2 in)
1915
54.9 mm (2.2 in)
1916
43.2 mm (1.7 in)
1917
84.6 mm (3.3 in)
1918
57.4 mm (2.3 in)
1919
83.3 mm (3.3 in)
1920
67.0 mm (2.6 in)
1921
78.0 mm (3.1 in)
1922
58.9 mm (2.3 in)
1923
59.8 mm (2.4 in)
1924
41.9 mm (1.6 in)
1925
82.8 mm (3.3 in)
1926
51.5 mm (2.0 in)
1927
48.2 mm (1.9 in)
1928
70.1 mm (2.8 in)
1929
65.5 mm (2.6 in)
1930
46.9 mm (1.8 in)
1931
77.2 mm (3.0 in)
1932
58.1 mm (2.3 in)
1933
36.5 mm (1.4 in)
1934
71.0 mm (2.8 in)
1935
49.8 mm (2.0 in)
1936
60.1 mm (2.4 in)
1937
85.7 mm (3.4 in)
1938
70.4 mm (2.8 in)
1939
58.7 mm (2.3 in)
1940
95.0 mm (3.7 in)
1941
71.9 mm (2.8 in)
1942
59.9 mm (2.4 in)
1943
51.1 mm (2.0 in)
1944
76.3 mm (3.0 in)
1945
58.7 mm (2.3 in)
1946
89.2 mm (3.5 in)
1947
73.2 mm (2.9 in)
1948
81.1 mm (3.2 in)
1949
55.6 mm (2.2 in)
1950
90.5 mm (3.6 in)
1951
51.6 mm (2.0 in)
1952
75.2 mm (3.0 in)
1953
119.2 mm (4.7 in)
1954
103.7 mm (4.1 in)
1955
67.3 mm (2.6 in)
1956
54.1 mm (2.1 in)
1957
61.3 mm (2.4 in)
1958
43.6 mm (1.7 in)
1959
21.8 mm (0.9 in)
1960
45.7 mm (1.8 in)
1961
78.3 mm (3.1 in)
1962
96.5 mm (3.8 in)
1963
56.1 mm (2.2 in)
1964
51.8 mm (2.0 in)
1965
61.7 mm (2.4 in)
1966
57.7 mm (2.3 in)
1967
74.7 mm (2.9 in)
1968
68.6 mm (2.7 in)
1969
51.6 mm (2.0 in)
1970
62.4 mm (2.5 in)
1971
64.7 mm (2.5 in)
1972
85.1 mm (3.4 in)
1973
80.0 mm (3.1 in)
1974
82.9 mm (3.3 in)
1975
48.3 mm (1.9 in)
1976
48.5 mm (1.9 in)
1977
58.2 mm (2.3 in)
1978
60.8 mm (2.4 in)
1979
90.4 mm (3.6 in)
1980
71.8 mm (2.8 in)
1981
42.0 mm (1.7 in)
1982
77.2 mm (3.0 in)
1983
63.6 mm (2.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Cochrane, 1910 to 1983. The record is 46 days in 1926, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Cochrane by year
Year
Longest dry spell (CDD)
1910
13 days
1911
12 days
1912
27 days
1913
11 days
1914
13 days
1915
25 days
1916
17 days
1917
21 days
1918
18 days
1919
14 days
1920
24 days
1921
17 days
1922
20 days
1923
26 days
1924
34 days
1925
32 days
1926
46 days
1927
35 days
1928
15 days
1929
14 days
1930
21 days
1931
16 days
1932
14 days
1933
14 days
1934
12 days
1935
21 days
1936
15 days
1937
14 days
1938
11 days
1939
20 days
1940
17 days
1941
17 days
1942
13 days
1943
13 days
1944
18 days
1945
15 days
1946
16 days
1947
17 days
1948
22 days
1949
24 days
1950
13 days
1951
18 days
1952
25 days
1953
14 days
1954
13 days
1955
10 days
1956
14 days
1957
23 days
1958
33 days
1959
16 days
1960
21 days
1961
26 days
1962
15 days
1963
12 days
1964
22 days
1965
18 days
1966
14 days
1967
11 days
1968
15 days
1969
14 days
1970
12 days
1971
16 days
1972
28 days
1973
14 days
1974
11 days
1975
18 days
1976
15 days
1977
21 days
1978
26 days
1979
20 days
1980
20 days
1981
16 days
1982
11 days
1983
10 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
52 years with a frost
Across 52 years with a frost, the median last spring frost at Cochrane falls on 14 June and the median first autumn frost on 7 September, which leaves a median of 88 days between them.
Fitted over all years, the growing season changes by -5.7 days per decade at this station.
Frost dates and growing season at Cochrane
Measure
Median, all years
Earliest period
Recent period (1937 to 1983)
Recent against earliest
Fitted trend
Last spring frost
14 June
n/a
15 June
n/a
+1.0 days per decade
First autumn frost
7 September
n/a
5 September
n/a
-4.7 days per decade
Growing days
88 days
n/a
83 days
n/a
-5.7 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, 1912 to 1983
A day with at least 37.9 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 74.7 mm (2.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Cochrane: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
37.9 mm (1.5 in)
5 years
48.4 mm (1.9 in)
10 years
55.1 mm (2.2 in)
25 years
63.3 mm (2.5 in)
50 years
69.1 mm (2.7 in)
100 years
74.7 mm (2.9 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 1912 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: 69.1 mm (2.7 in) in 1954; 62.7 mm (2.5 in) in 1950; 62.2 mm (2.4 in) in 1948.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Cochrane, at 1934. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1934 ran 0.6 C (1.2 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Cochrane, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1934
-0.6
-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 Cochrane standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cochrane 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.