Lake Louise Weather Records (CA003053760)
Record envelope, standing records and threshold days for Lake Louise (CA003053760), Alberta, Canada, with 93 years of record.
Key Facts for Lake Louise
- Lake Louise (CA003053760) is a weather station in Alberta, Canada at 51.43 latitude and -116.22 longitude, 1,524 m (5,000 ft) above sea level.
- The station reports from 1915 to 2007, 93 years of record.
- 1,464 records set at Lake Louise still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Lake Louise set a daily record low minimum temperature of -42.0 C (-43.6 F) on 24 December 1983.
About the Station
- Location: Alberta, Canada, 51.43 latitude, -116.22 longitude.
- Elevation: 1,524 m (5,000 ft).
- Period of record: 1915 to 2007, 93 years.
- Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
0 days at or beyond a record| 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 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| 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)| 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| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1915 | 337 | 92% | Yes |
| 1916 | 91 | 25% | No |
| 1917 | 208 | 57% | No |
| 1918 | 135 | 37% | No |
| 1919 | 359 | 98% | Yes |
| 1920 | 365 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 365 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 361 | 99% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 345 | 95% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 338 | 92% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 364 | 100% | Yes |
| 1935 | 357 | 98% | Yes |
| 1936 | 352 | 96% | Yes |
| 1937 | 361 | 99% | Yes |
| 1938 | 358 | 98% | Yes |
| 1939 | 321 | 88% | No |
| 1940 | 336 | 92% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 345 | 95% | Yes |
| 1943 | 346 | 95% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 343 | 94% | Yes |
| 1946 | 345 | 95% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 346 | 95% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 355 | 97% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 361 | 99% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 363 | 99% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 363 | 99% | Yes |
| 1969 | 360 | 99% | Yes |
| 1970 | 359 | 98% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 363 | 99% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 270 | 74% | No |
| 1976 | 359 | 98% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 360 | 98% | Yes |
| 1981 | 361 | 99% | Yes |
| 1982 | 361 | 99% | Yes |
| 1983 | 359 | 98% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 24 December 1983 | Lake Louise, CA | daily low min | -42.0 C (-43.6 F) | 4.0 C (7.2 F) | 5 years | 11 of 100 (Routine) |
| 22 December 1983 | Lake Louise, CA | daily low max | -20.0 C (-4.0 F) | 1.1 C (2.0 F) | 12 years | 10 of 100 (Routine) |
| 4 November 1983 | Lake Louise, CA | daily high min | -0.5 C (31.1 F) | 0.1 C (0.2 F) | 8 years | 8 of 100 (Routine) |
| 1 September 1983 | Lake Louise, CA | daily rain | 14.2 mm (0.6 in) | 1.0 mm (0.04 in) | 61 years | 20 of 100 (Routine) |
| 29 August 1983 | Lake Louise, CA | daily high min | 7.0 C (44.6 F) | 0.9 C (1.6 F) | 26 years | 16 of 100 (Routine) |
| 11 August 1983 | Lake Louise, CA | daily high min | 9.0 C (48.2 F) | 0.1 C (0.2 F) | 32 years | 15 of 100 (Routine) |
| 1 August 1983 | Lake Louise, CA | daily high min | 12.0 C (53.6 F) | 1.4 C (2.5 F) | 49 years | 24 of 100 (Routine) |
| 14 July 1983 | Lake Louise, CA | daily low max | 10.5 C (50.9 F) | 0.5 C (0.9 F) | 0 years | 7 of 100 (Routine) |
| 19 June 1983 | Lake Louise, CA | daily low max | 7.5 C (45.5 F) | 2.5 C (4.5 F) | 14 years | 15 of 100 (Routine) |
| 24 April 1983 | Lake Louise, CA | daily rain | 23.0 mm (0.9 in) | 7.8 mm (0.31 in) | 28 years | 20 of 100 (Routine) |
| 24 April 1983 | Lake Louise, CA | daily high min | 3.0 C (37.4 F) | 1.9 C (3.4 F) | 29 years | 17 of 100 (Routine) |
| 14 March 1983 | Lake Louise, CA | daily rain | 7.0 mm (0.28 in) | 1.4 mm (0.06 in) | 56 years | 20 of 100 (Routine) |
| 14 March 1983 | Lake Louise, CA | daily snowfall | 7.0 cm (2.8 in) | 1.4 cm (0.6 in) | 56 years | 24 of 100 (Routine) |
| 24 February 1983 | Lake Louise, CA | daily high max | 10.0 C (50.0 F) | 3.3 C (5.9 F) | 61 years | 29 of 100 (Routine) |
| 13 January 1983 | Lake Louise, CA | daily high min | -4.0 C (24.8 F) | 1.0 C (1.8 F) | 63 years | 24 of 100 (Routine) |
| 24 November 1982 | Lake Louise, CA | daily low max | -13.0 C (8.6 F) | 3.0 C (5.4 F) | 16 years | 16 of 100 (Routine) |
| 2 August 1982 | Lake Louise, CA | daily low max (Tie) | 13.0 C (55.4 F) | tie | 1 year | 1 of 100 (Routine) |
| 22 July 1982 | Lake Louise, CA | daily low max | 11.0 C (51.8 F) | 1.2 C (2.2 F) | 28 years | 16 of 100 (Routine) |
| 19 July 1982 | Lake Louise, CA | daily rain | 10.0 mm (0.4 in) | 2.6 mm (0.10 in) | 13 years | 14 of 100 (Routine) |
| 14 July 1982 | Lake Louise, CA | daily low max | 11.0 C (51.8 F) | 0.5 C (0.9 F) | 0 years | 7 of 100 (Routine) |
Climate Trend
52 complete years, 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.
| 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| 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)
| 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)
| 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)
| 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)
| 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)
| 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 frostAcross 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.
| 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 1983A 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.
| 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 suspected3 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).
| 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
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).