Calgary May 21 Weather Records

Daily averages and all-time records for weather in Calgary, Alberta for the date of May 21.
May 21 All-Time Records
1881–2024
Highest temperature 30.6 °C 1928
Lowest temperature -5.0 °C 1903
Lowest daily high 2.3 °C 1997
Highest daily low 11.7 °C 1961
Most precipitation 3.33 cm 2020
Most snow 20.3 cm 1906
May 21 Average Weather
1991–2020 1
Average high 17.2 °C
Average low 4.3 °C
Chance precipitation 39.9%
Chance snow 5.5%
Calgary May 21 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 28.0 10.8 0.00 0.0
2022 n/a n/a 0.00 0.0
2021 11.3 0.1 0.00 0.0
2020 8.2 2.7 3.33 0.0
2019 7.6 4.0 0.18 0.0
2018 23.4 9.2 0.00 0.0
2017 23.0 5.2 0.00 0.0
2016 7.1 2.1 1.01 0.0
2015 21.4 4.5 0.00 0.0
2014 24.2 5.9 0.00 0.0
2013 22.4 5.9 0.00 0.0
2012 20.4 8.0 0.00 0.0
2011 21.4 6.9 0.00 0.0
2010 15.0 1.5 0.00 0.0
2009 14.1 -1.4 0.00 0.0
2008 12.3 6.0 1.58 0.0
2007 8.8 0.6 1.56 3.0
2006 24.5 7.9 0.00 0.0
2005 18.1 0.9 0.00 0.0
2004 8.7 3.5 0.00 0.0
2003 16.7 2.6 0.00 0.0
2002 13.3 -0.2 0.00 0.0
2001 19.8 -2.4 0.00 0.0
2000 21.7 7.2 0.00 0.0
1999 16.2 3.7 0.36 0.0
1998 21.3 10.0 1.40 0.0
1997 2.3 -1.7 0.18 2.0
1996 14.5 0.2 0.00 0.0
1995 11.9 0.0 0.96 9.0
1994 9.2 2.2 0.00 0.0
1993 21.1 6.5 0.05 0.0
1992 3.1 -3.0 0.06 1.0
1991 15.3 6.2 0.34 0.0
1990 13.4 4.5 0.42 0.0
1989 13.8 -0.9 0.00 0.0
1988 24.0 1.6 0.00 0.0
1987 8.5 1.8 0.02 0.0
1986 15.8 3.5 0.49 0.0
1985 25.9 7.8 0.00 0.0
1984 15.2 3.1 0.00 0.0
1983 17.8 3.8 0.06 0.0
1982 20.2 4.5 0.00 0.0
1981 16.0 10.0 0.08 0.0
1980 27.1 6.7 0.00 0.0
1979 15.6 5.8 0.00 0.0
1978 23.8 9.2 0.00 0.0
1977 18.7 6.0 0.02 0.0
1976 16.7 4.4 0.00 0.0
1975 17.8 1.1 0.00 0.0
1974 13.9 2.2 0.00 0.0
1973 16.7 3.3 0.05 0.0
1972 23.9 5.6 0.00 0.0
1971 16.1 4.4 0.10 0.0
1970 20.6 0.0 0.00 0.0
1969 20.0 -1.1 0.00 0.0
1968 22.2 0.0 0.00 0.0
1967 25.6 8.9 0.00 0.0
1966 22.2 1.7 0.03 0.0
1965 12.8 -1.7 0.00 0.0
1964 17.2 4.4 0.00 0.0
1963 20.6 1.1 0.00 0.0
1962 15.6 5.0 0.00 0.0
1961 26.1 11.7 0.00 0.0
1960 14.4 5.6 0.03 0.0
1959 13.9 1.7 0.00 0.0
1958 24.4 7.8 0.00 0.0
1957 7.2 2.2 0.00 0.0
1956 21.7 10.6 0.00 0.0
1955 6.7 3.3 0.64 0.0
1954 13.9 8.3 0.00 0.0
1953 10.6 3.3 0.38 0.0
1952 16.1 7.8 0.00 0.0
1951 23.3 1.1 0.00 0.0
1950 21.1 1.7 0.00 0.0
1949 11.1 5.6 0.08 0.5
1948 23.3 7.2 3.00 0.0
1947 12.2 2.2 0.00 0.0
1946 19.4 -0.6 0.10 0.0
1945 14.4 -0.6 0.00 0.0
1944 17.8 5.6 1.78 0.0
1943 21.7 7.8 0.00 0.0
1942 24.4 3.3 0.00 0.0
1941 10.6 1.7 0.05 0.0
1940 22.8 4.4 0.00 0.0
1939 13.3 2.8 0.00 0.0
1938 23.9 11.7 0.00 0.0
1937 21.1 0.0 0.00 0.0
1936 16.7 5.6 0.00 0.0
1935 23.3 11.1 0.00 0.0
1934 16.7 2.8 0.00 0.0
1933 16.7 2.2 0.25 0.0
1932 15.6 10.0 2.29 0.0
1931 7.8 0.0 0.00 0.0
1930 10.6 0.6 0.00 0.0
1929 21.7 8.3 0.00 0.0
1928 30.6 11.7 0.00 0.0
1927 12.8 3.3 0.03 0.0
1926 22.2 0.6 0.00 0.0
1925 16.7 11.7 0.05 0.0
1924 23.9 3.3 0.00 0.0
1923 25.0 5.0 0.00 0.0
1922 19.4 3.3 0.00 0.0
1921 20.0 7.8 0.00 0.0
1920 16.1 2.2 0.00 0.0
1919 25.6 10.0 0.00 0.0
1918 12.2 1.1 0.20 0.0
1917 12.2 4.4 0.30 0.0
1916 16.1 -1.1 0.08 0.0
1915 17.2 0.0 0.25 0.0
1914 17.8 1.7 0.00 0.0
1913 22.2 2.2 0.00 0.0
1912 12.2 0.6 0.03 0.0
1911 13.3 5.6 0.00 0.0
1910 23.9 0.0 0.00 0.0
1909 13.9 4.4 0.15 0.0
1908 17.8 1.1 0.00 0.0
1907 6.7 -0.6 0.00 0.0
1906 15.6 1.1 2.39 20.3
1905 14.4 6.7 0.61 0.0
1904 23.9 9.4 0.00 0.0
1903 10.6 -5.0 0.00 0.0
1902 9.4 5.0 1.65 0.0
1901 16.7 2.8 1.07 0.0
1900 18.9 6.7 0.00 0.0
1899 14.4 3.3 0.64 0.0
1898 18.9 0.6 0.00 0.0
1897 29.4 4.4 0.00 0.0
1896 16.7 1.1 0.00 0.0
1895 20.0 0.0 0.00 0.0
1894 20.6 4.4 0.00 0.0
1893 16.1 1.7 0.00 0.0
1892 28.9 2.2 0.00 0.0
1891 22.2 -3.3 0.00 0.0
1890 15.0 5.0 2.08 0.0
1889 24.4 4.4 0.00 0.0
1888 15.0 -2.8 0.00 0.0
1887 14.4 -0.6 0.38 0.0
1886 22.2 2.2 0.00 0.0
1885 10.6 3.3 0.30 0.0
1884 n/a n/a n/a n/a
1883 n/a n/a n/a n/a
1882 n/a n/a n/a n/a
What's the all-time high for Calgary on 5/21?
For the date of May 21, the highest temperature ever reached in Calgary history is 30.6 °C which happened in 1928.
Highest Temperatures in Calgary on May 21
Rank Temperature Year
1 30.6 °C 1928
2 29.4 °C 1897
3 28.9 °C 1892
4 28.0 °C 2023
5 27.1 °C 1980
6 26.1 °C 1961
7 25.9 °C 1985
8 25.6 °C 1919
8 25.6 °C 1967
10 25.0 °C 1923
What's the all-time low for Calgary on 5/21?
For the date of May 21, the lowest temperature ever reached in Calgary history is -5.0 °C which happened in 1903.
Lowest Temperatures in Calgary on May 21
Rank Temperature Year
1 -5.0 °C 1903
2 -3.3 °C 1891
3 -3.0 °C 1992
4 -2.8 °C 1888
5 -2.4 °C 2001
6 -1.7 °C 1997
6 -1.7 °C 1965
8 -1.4 °C 2009
9 -1.1 °C 1916
9 -1.1 °C 1969
Lowest High Temperatures in Calgary on May 21
Rank Temperature Year
1 2.3 °C 1997
2 3.1 °C 1992
3 6.7 °C 1955
3 6.7 °C 1907
5 7.1 °C 2016
6 7.2 °C 1957
7 7.6 °C 2019
8 7.8 °C 1931
9 8.2 °C 2020
10 8.5 °C 1987
What's the most it has ever rained in Calgary on 5/21?
For the date of May 21, the most precipitation ever recorded in Calgary history is 3.33 cm which happened in 2020.
All-Time Most Precipitation in Calgary on May 21
Rank Precipitation Year
1 3.33 cm 2020
2 3.00 cm 1948
3 2.39 cm 1906
4 2.29 cm 1932
5 2.08 cm 1890
6 1.78 cm 1944
7 1.65 cm 1902
8 1.58 cm 2008
9 1.56 cm 2007
10 1.40 cm 1998
All-Time Most Snow in Calgary on May 21
Rank Precipitation Year
1 20.3 cm 1906
2 9.0 cm 1995
3 3.0 cm 2007
4 2.0 cm 1997
5 1.0 cm 1992
6 0.5 cm 1949
Weather Station Details
Years Station Coordinates
2012–2024 Calgary International Airport location
1881–2012 Calgary International Airport location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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