Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Lake Louise. 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 Lake Louise, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
7.8 C (46.0 F)
-52.8 C (-63.0 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-50.6 C (-59.1 F)
n/a
n/a
Mar
16.1 C (61.0 F)
-44.4 C (-47.9 F)
n/a
n/a
Apr
26.1 C (79.0 F)
-33.9 C (-29.0 F)
n/a
n/a
May
31.7 C (89.1 F)
-12.8 C (9.0 F)
n/a
n/a
Jun
31.1 C (88.0 F)
-10.0 C (14.0 F)
n/a
n/a
Jul
34.4 C (93.9 F)
-7.0 C (19.4 F)
n/a
n/a
Aug
32.2 C (90.0 F)
-7.2 C (19.0 F)
n/a
n/a
Sep
28.3 C (82.9 F)
-17.2 C (1.0 F)
n/a
n/a
Oct
25.0 C (77.0 F)
-30.6 C (-23.1 F)
n/a
n/a
Nov
15.6 C (60.1 F)
-43.3 C (-45.9 F)
n/a
n/a
Dec
12.2 C (54.0 F)
-49.4 C (-56.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lake Louise still stand. 1919 holds the most, with 67.
Standing records at Lake Louise by the year they were set
Year set
Standing records
1915
16
1916
15
1917
22
1918
17
1919
67
1920
17
1921
29
1922
17
1923
11
1924
31
1925
18
1926
40
1927
14
1928
23
1929
27
1930
28
1931
13
1932
25
1933
40
1934
26
1935
38
1936
53
1937
23
1938
7
1939
29
1940
22
1941
31
1942
16
1943
31
1944
28
1945
19
1946
8
1947
19
1948
13
1949
37
1950
20
1951
26
1952
11
1953
16
1954
34
1955
27
1956
25
1957
24
1958
13
1959
21
1960
18
1961
20
1962
20
1963
17
1964
13
1965
26
1966
9
1967
20
1968
27
1969
5
1970
19
1971
21
1972
19
1973
18
1974
10
1975
18
1976
8
1977
23
1978
6
1979
4
1980
19
1981
17
1982
9
1983
11
All-Time Record Progression
4 new records
4 all-time records were set at Lake Louise between 25 January 1950 and 24 July 1959. Each dot is a new record.
When Lake Louise set new all-time records
Date
Kind
Detail
1950-01-25
Record low minimum temperature
Record low minimum temperature -52.8 C (-63.0 F)
1955-12-26
Record daily precipitation
Record daily precipitation 58.4 mm (2.3 in)
1955-12-26
Record daily snowfall
Record daily snowfall 58.4 cm (23.0 in)
1959-07-24
Record high minimum temperature
Record high minimum temperature 15.0 C (59.0 F)
Wettest Day of Each Month
Dec: 58.4 mm (2.3 in)
The wettest day on record for each calendar month at Lake Louise. The most was 58.4 mm (2.3 in) on 26 December 1955.
Record daily precipitation for each month at Lake Louise
Month
Record daily precipitation (mm)
Date
Jan
45.2 mm (1.8 in)
14 January 1921
Feb
41.9 mm (1.6 in)
17 February 1948
Mar
38.1 mm (1.5 in)
3 March 1918
Apr
40.6 mm (1.6 in)
9 April 1940
May
45.7 mm (1.8 in)
26 May 1973
Jun
55.1 mm (2.2 in)
26 June 1915
Jul
53.5 mm (2.1 in)
13 July 1981
Aug
36.6 mm (1.4 in)
22 August 1925
Sep
39.4 mm (1.6 in)
19 September 1960
Oct
43.2 mm (1.7 in)
28 October 1935
Nov
33.0 mm (1.3 in)
18 November 1946
Dec
58.4 mm (2.3 in)
26 December 1955
Period of Record Coverage
1915 to 1983
Complete yearUnder 90 percent of days
69 years of record at Lake Louise, 1915 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1916, 1917, 1918, 1939, 1975.
Cooler than the station meanWarmer than the station mean
One stripe for each of 52 complete years at Lake Louise, 1919 to 1983. Blue stripes are years cooler than the station's own mean of -0.4 C (31.2 F); red stripes are warmer. The coolest year was 1927, at -1.9 C (28.5 F), and the warmest was 1958, at 1.4 C (34.5 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Lake Louise as warming stripes, 1919 to 1983
Year
Annual mean temperature
Difference from the station mean
1919
-1.4 C
-1.01 C
1920
-0.8 C
-0.38 C
1921
-1.0 C
-0.59 C
1922
-1.8 C
-1.41 C
1923
-0.8 C
-0.33 C
1924
-1.3 C
-0.84 C
1925
0.6 C
+1.00 C
1926
0.5 C
+0.95 C
1927
-1.9 C
-1.48 C
1928
-0.4 C
+0.03 C
1930
-0.8 C
-0.41 C
1931
0.0 C
+0.41 C
1933
-0.2 C
+0.21 C
1934
1.1 C
+1.50 C
1935
-0.8 C
-0.39 C
1937
-0.9 C
-0.48 C
1938
0.4 C
+0.88 C
1941
1.3 C
+1.74 C
1944
0.4 C
+0.88 C
1947
0.6 C
+1.08 C
1949
-0.4 C
+0.04 C
1950
-1.8 C
-1.40 C
1951
-1.9 C
-1.42 C
1953
0.7 C
+1.17 C
1954
-0.7 C
-0.24 C
1955
-1.9 C
-1.45 C
1956
-0.4 C
+0.04 C
1957
-0.6 C
-0.18 C
1958
1.4 C
+1.82 C
1959
-0.7 C
-0.31 C
1960
0.0 C
+0.43 C
1961
0.6 C
+1.00 C
1962
0.4 C
+0.80 C
1963
0.9 C
+1.29 C
1964
-0.2 C
+0.21 C
1966
0.1 C
+0.58 C
1967
0.6 C
+1.05 C
1968
-0.3 C
+0.12 C
1969
-0.9 C
-0.46 C
1970
-0.7 C
-0.24 C
1971
-0.9 C
-0.47 C
1972
-1.6 C
-1.14 C
1973
-0.3 C
+0.10 C
1974
0.3 C
+0.69 C
1976
0.0 C
+0.43 C
1977
-1.1 C
-0.62 C
1978
-1.2 C
-0.72 C
1979
-1.4 C
-0.94 C
1980
-1.1 C
-0.65 C
1981
-0.4 C
+0.08 C
1982
-1.8 C
-1.34 C
1983
0.1 C
+0.55 C
The fitted trend in annual mean temperature here over 1919 to 1983 is 0.01 C (-0.12 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.21 to 0.24) 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 Lake Louise
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.12 to 0.14) per decade
0.02 F (-0.21 to 0.24) per decade
1919 to 1983
52
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.3 to 0.1) per decade
1919 to 1983
52
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.4) per decade
1919 to 1983
52
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
1915 to 1983
Yearly extremes at Lake Louise: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
34.4 C (93.9 F)
1941
30.0 C (86.0 F)
69
Coldest night (TNn)
-52.8 C (-63.0 F)
1950
-43.0 C (-45.4 F)
69
Wettest day (Rx1day)
58.4 mm (2.3 in)
1955
30.5 mm (1.2 in)
69
Wettest five days (Rx5day)
110.5 mm (4.4 in)
1955
62.2 mm (2.4 in)
69
Longest dry spell (CDD)
46 days
1930
19 days
69
Hottest day (TXx)
The hottest day of the year at Lake Louise, 1915 to 1983. The record is 34.4 C (93.9 F) in 1941, marked on the chart; the median year is 30.0 C (86.0 F).
Hottest day (TXx) at Lake Louise by year
Year
Hottest day (TXx)
1915
26.1 C (79.0 F)
1916
8.3 C (46.9 F)
1917
31.1 C (88.0 F)
1918
9.4 C (48.9 F)
1919
32.2 C (90.0 F)
1920
32.2 C (90.0 F)
1921
27.8 C (82.0 F)
1922
27.8 C (82.0 F)
1923
28.3 C (82.9 F)
1924
31.1 C (88.0 F)
1925
29.4 C (84.9 F)
1926
31.1 C (88.0 F)
1927
30.0 C (86.0 F)
1928
31.1 C (88.0 F)
1929
30.6 C (87.1 F)
1930
30.0 C (86.0 F)
1931
30.0 C (86.0 F)
1932
30.0 C (86.0 F)
1933
31.1 C (88.0 F)
1934
32.8 C (91.0 F)
1935
30.6 C (87.1 F)
1936
31.7 C (89.1 F)
1937
30.6 C (87.1 F)
1938
31.1 C (88.0 F)
1939
31.1 C (88.0 F)
1940
31.1 C (88.0 F)
1941
34.4 C (93.9 F)
1942
29.4 C (84.9 F)
1943
27.8 C (82.0 F)
1944
31.1 C (88.0 F)
1945
30.0 C (86.0 F)
1946
30.0 C (86.0 F)
1947
27.8 C (82.0 F)
1948
28.3 C (82.9 F)
1949
28.9 C (84.0 F)
1950
28.9 C (84.0 F)
1951
28.3 C (82.9 F)
1952
28.3 C (82.9 F)
1953
28.9 C (84.0 F)
1954
26.7 C (80.1 F)
1955
30.0 C (86.0 F)
1956
30.0 C (86.0 F)
1957
26.1 C (79.0 F)
1958
28.3 C (82.9 F)
1959
30.6 C (87.1 F)
1960
30.6 C (87.1 F)
1961
31.1 C (88.0 F)
1962
27.8 C (82.0 F)
1963
27.8 C (82.0 F)
1964
29.4 C (84.9 F)
1965
30.0 C (86.0 F)
1966
28.9 C (84.0 F)
1967
30.0 C (86.0 F)
1968
31.1 C (88.0 F)
1969
27.2 C (81.0 F)
1970
29.4 C (84.9 F)
1971
31.7 C (89.1 F)
1972
28.3 C (82.9 F)
1973
31.7 C (89.1 F)
1974
28.9 C (84.0 F)
1975
31.1 C (88.0 F)
1976
27.8 C (82.0 F)
1977
28.0 C (82.4 F)
1978
29.5 C (85.1 F)
1979
31.5 C (88.7 F)
1980
28.0 C (82.4 F)
1981
29.0 C (84.2 F)
1982
26.5 C (79.7 F)
1983
28.0 C (82.4 F)
Coldest night (TNn)
The coldest night of the year at Lake Louise, 1915 to 1983. The record is -52.8 C (-63.0 F) in 1950, marked on the chart; the median year is -43.0 C (-45.4 F).
Coldest night (TNn) at Lake Louise by year
Year
Coldest night (TNn)
1915
-32.2 C (-26.0 F)
1916
-44.4 C (-47.9 F)
1917
-40.6 C (-41.1 F)
1918
-44.4 C (-47.9 F)
1919
-46.7 C (-52.1 F)
1920
-47.2 C (-53.0 F)
1921
-47.2 C (-53.0 F)
1922
-42.2 C (-44.0 F)
1923
-50.6 C (-59.1 F)
1924
-49.4 C (-56.9 F)
1925
-37.8 C (-36.0 F)
1926
-45.6 C (-50.1 F)
1927
-47.2 C (-53.0 F)
1928
-41.7 C (-43.1 F)
1929
-50.0 C (-58.0 F)
1930
-51.2 C (-60.2 F)
1931
-33.3 C (-27.9 F)
1932
-45.6 C (-50.1 F)
1933
-45.0 C (-49.0 F)
1934
-40.0 C (-40.0 F)
1935
-48.3 C (-54.9 F)
1936
-48.3 C (-54.9 F)
1937
-43.9 C (-47.0 F)
1938
-41.1 C (-42.0 F)
1939
-43.9 C (-47.0 F)
1940
-41.1 C (-42.0 F)
1941
-43.3 C (-45.9 F)
1942
-40.0 C (-40.0 F)
1943
-46.7 C (-52.1 F)
1944
-36.1 C (-33.0 F)
1945
-41.7 C (-43.1 F)
1946
-40.6 C (-41.1 F)
1947
-46.1 C (-51.0 F)
1948
-38.3 C (-36.9 F)
1949
-45.0 C (-49.0 F)
1950
-52.8 C (-63.0 F)
1951
-45.0 C (-49.0 F)
1952
-38.9 C (-38.0 F)
1953
-36.7 C (-34.1 F)
1954
-46.7 C (-52.1 F)
1955
-45.0 C (-49.0 F)
1956
-45.6 C (-50.1 F)
1957
-48.9 C (-56.0 F)
1958
-37.8 C (-36.0 F)
1959
-45.6 C (-50.1 F)
1960
-41.1 C (-42.0 F)
1961
-40.6 C (-41.1 F)
1962
-42.8 C (-45.0 F)
1963
-44.4 C (-47.9 F)
1964
-41.1 C (-42.0 F)
1965
-36.7 C (-34.1 F)
1966
-38.9 C (-38.0 F)
1967
-33.3 C (-27.9 F)
1968
-43.9 C (-47.0 F)
1969
-45.0 C (-49.0 F)
1970
-44.4 C (-47.9 F)
1971
-38.3 C (-36.9 F)
1972
-45.0 C (-49.0 F)
1973
-40.6 C (-41.1 F)
1974
-41.7 C (-43.1 F)
1975
-42.8 C (-45.0 F)
1976
-38.9 C (-38.0 F)
1977
-43.0 C (-45.4 F)
1978
-42.0 C (-43.6 F)
1979
-40.0 C (-40.0 F)
1980
-43.0 C (-45.4 F)
1981
-39.5 C (-39.1 F)
1982
-43.5 C (-46.3 F)
1983
-42.0 C (-43.6 F)
Wettest day (Rx1day)
The wettest day of the year at Lake Louise, 1915 to 1983. The record is 58.4 mm (2.3 in) in 1955, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest day (Rx1day) at Lake Louise by year
Year
Wettest day (Rx1day)
1915
55.1 mm (2.2 in)
1916
36.8 mm (1.4 in)
1917
20.3 mm (0.8 in)
1918
38.1 mm (1.5 in)
1919
30.5 mm (1.2 in)
1920
27.4 mm (1.1 in)
1921
45.2 mm (1.8 in)
1922
32.5 mm (1.3 in)
1923
38.6 mm (1.5 in)
1924
36.8 mm (1.4 in)
1925
36.6 mm (1.4 in)
1926
22.9 mm (0.9 in)
1927
18.5 mm (0.7 in)
1928
34.8 mm (1.4 in)
1929
30.5 mm (1.2 in)
1930
35.6 mm (1.4 in)
1931
27.9 mm (1.1 in)
1932
35.6 mm (1.4 in)
1933
45.7 mm (1.8 in)
1934
22.9 mm (0.9 in)
1935
43.2 mm (1.7 in)
1936
20.3 mm (0.8 in)
1937
37.1 mm (1.5 in)
1938
27.9 mm (1.1 in)
1939
43.2 mm (1.7 in)
1940
40.6 mm (1.6 in)
1941
27.9 mm (1.1 in)
1942
30.5 mm (1.2 in)
1943
34.3 mm (1.4 in)
1944
40.6 mm (1.6 in)
1945
25.4 mm (1.0 in)
1946
33.0 mm (1.3 in)
1947
40.6 mm (1.6 in)
1948
41.9 mm (1.6 in)
1949
35.6 mm (1.4 in)
1950
33.0 mm (1.3 in)
1951
36.8 mm (1.4 in)
1952
26.7 mm (1.1 in)
1953
27.9 mm (1.1 in)
1954
30.0 mm (1.2 in)
1955
58.4 mm (2.3 in)
1956
48.3 mm (1.9 in)
1957
30.5 mm (1.2 in)
1958
30.5 mm (1.2 in)
1959
38.1 mm (1.5 in)
1960
39.4 mm (1.6 in)
1961
33.5 mm (1.3 in)
1962
26.4 mm (1.0 in)
1963
25.1 mm (1.0 in)
1964
21.8 mm (0.9 in)
1965
38.1 mm (1.5 in)
1966
37.3 mm (1.5 in)
1967
27.9 mm (1.1 in)
1968
25.4 mm (1.0 in)
1969
20.3 mm (0.8 in)
1970
18.3 mm (0.7 in)
1971
30.5 mm (1.2 in)
1972
29.7 mm (1.2 in)
1973
45.7 mm (1.8 in)
1974
25.4 mm (1.0 in)
1975
29.0 mm (1.1 in)
1976
25.9 mm (1.0 in)
1977
24.0 mm (0.9 in)
1978
28.0 mm (1.1 in)
1979
23.8 mm (0.9 in)
1980
33.0 mm (1.3 in)
1981
53.5 mm (2.1 in)
1982
29.0 mm (1.1 in)
1983
23.0 mm (0.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lake Louise, 1915 to 1983. The record is 110.5 mm (4.4 in) in 1955, marked on the chart; the median year is 62.2 mm (2.4 in).
Wettest five days (Rx5day) at Lake Louise by year
Year
Wettest five days (Rx5day)
1915
70.9 mm (2.8 in)
1916
41.4 mm (1.6 in)
1917
63.4 mm (2.5 in)
1918
86.4 mm (3.4 in)
1919
81.3 mm (3.2 in)
1920
72.8 mm (2.9 in)
1921
100.4 mm (4.0 in)
1922
48.0 mm (1.9 in)
1923
57.1 mm (2.2 in)
1924
65.3 mm (2.6 in)
1925
44.8 mm (1.8 in)
1926
48.7 mm (1.9 in)
1927
40.2 mm (1.6 in)
1928
62.2 mm (2.4 in)
1929
74.9 mm (2.9 in)
1930
53.4 mm (2.1 in)
1931
66.5 mm (2.6 in)
1932
51.5 mm (2.0 in)
1933
90.2 mm (3.6 in)
1934
44.8 mm (1.8 in)
1935
79.5 mm (3.1 in)
1936
34.5 mm (1.4 in)
1937
96.6 mm (3.8 in)
1938
60.9 mm (2.4 in)
1939
93.8 mm (3.7 in)
1940
55.9 mm (2.2 in)
1941
91.5 mm (3.6 in)
1942
58.4 mm (2.3 in)
1943
75.0 mm (3.0 in)
1944
67.8 mm (2.7 in)
1945
81.3 mm (3.2 in)
1946
80.0 mm (3.1 in)
1947
85.1 mm (3.4 in)
1948
82.6 mm (3.3 in)
1949
66.8 mm (2.6 in)
1950
86.3 mm (3.4 in)
1951
91.4 mm (3.6 in)
1952
48.4 mm (1.9 in)
1953
96.5 mm (3.8 in)
1954
69.8 mm (2.7 in)
1955
110.5 mm (4.4 in)
1956
81.3 mm (3.2 in)
1957
55.8 mm (2.2 in)
1958
50.8 mm (2.0 in)
1959
66.5 mm (2.6 in)
1960
47.6 mm (1.9 in)
1961
60.9 mm (2.4 in)
1962
40.7 mm (1.6 in)
1963
43.1 mm (1.7 in)
1964
38.3 mm (1.5 in)
1965
64.8 mm (2.6 in)
1966
61.0 mm (2.4 in)
1967
43.2 mm (1.7 in)
1968
35.5 mm (1.4 in)
1969
33.1 mm (1.3 in)
1970
40.7 mm (1.6 in)
1971
71.1 mm (2.8 in)
1972
61.0 mm (2.4 in)
1973
61.5 mm (2.4 in)
1974
57.4 mm (2.3 in)
1975
63.5 mm (2.5 in)
1976
42.7 mm (1.7 in)
1977
39.4 mm (1.6 in)
1978
51.0 mm (2.0 in)
1979
68.0 mm (2.7 in)
1980
78.5 mm (3.1 in)
1981
77.2 mm (3.0 in)
1982
62.0 mm (2.4 in)
1983
51.0 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lake Louise, 1915 to 1983. The record is 46 days in 1930, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Lake Louise by year
Year
Longest dry spell (CDD)
1915
30 days
1916
16 days
1917
36 days
1918
13 days
1919
17 days
1920
17 days
1921
15 days
1922
24 days
1923
21 days
1924
15 days
1925
21 days
1926
19 days
1927
16 days
1928
24 days
1929
30 days
1930
46 days
1931
16 days
1932
18 days
1933
25 days
1934
20 days
1935
22 days
1936
26 days
1937
25 days
1938
29 days
1939
19 days
1940
24 days
1941
18 days
1942
24 days
1943
19 days
1944
22 days
1945
18 days
1946
21 days
1947
16 days
1948
11 days
1949
29 days
1950
27 days
1951
11 days
1952
19 days
1953
19 days
1954
19 days
1955
19 days
1956
19 days
1957
18 days
1958
17 days
1959
10 days
1960
19 days
1961
17 days
1962
14 days
1963
17 days
1964
30 days
1965
14 days
1966
15 days
1967
19 days
1968
18 days
1969
32 days
1970
31 days
1971
19 days
1972
35 days
1973
24 days
1974
32 days
1975
36 days
1976
20 days
1977
20 days
1978
13 days
1979
16 days
1980
28 days
1981
16 days
1982
18 days
1983
17 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 Lake Louise falls on 28 June and the median first autumn frost on 3 July, which leaves a median of 6 days between them.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
Frost dates and growing season at Lake Louise
Measure
Median, all years
Earliest period
Recent period (1951 to 1983)
Recent against earliest
Fitted trend
Last spring frost
28 June
n/a
28 June
n/a
-0.3 days per decade
First autumn frost
3 July
n/a
3 July
n/a
+1.0 days per decade
Growing days
6 days
n/a
6 days
n/a
+1.3 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
63 years, 1915 to 1983
A day with at least 31.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 59.1 mm (2.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Lake Louise: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
31.8 mm (1.3 in)
5 years
39.7 mm (1.6 in)
10 years
44.7 mm (1.8 in)
25 years
50.8 mm (2.0 in)
50 years
55.0 mm (2.2 in)
100 years
59.1 mm (2.3 in)
Longer than the 63 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, 63 years of values from 1915 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: 58.4 mm (2.3 in) in 1955; 55.1 mm (2.2 in) in 1915; 53.5 mm (2.1 in) in 1981.
Station Changes
3 suspected
3 changes were suspected in the annual mean temperature of Lake Louise, at 1933, 1950 and 1967. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1933 ran 0.6 C (1.0 F) higher than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1950 ran 0.3 C (0.6 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1967 ran 0.3 C (0.6 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Lake Louise, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1933
+0.6
+1.0
possible
5
1950
-0.3
-0.6
possible
5
1967
-0.3
-0.6
possible
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 Lake Louise standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lake Louise 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.