Calgary August 21 Weather Records

Daily averages and all-time records for weather in Calgary, Alberta for the date of August 21.
August 21 All-Time Records
1881–2024
Highest temperature 33.3 °C 1894
Lowest temperature 0.0 °C 1904
Lowest daily high 9.0 °C 1985
Highest daily low 17.2 °C 1971
Most precipitation 4.11 cm 1906
Most snow 0.2 cm 1992
August 21 Average Weather
1991–2020 1
Average high 22.5 °C
Average low 8.7 °C
Chance precipitation 32.8%
Chance snow 0.3%
Calgary August 21 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 18.0 7.6 0.07 0.0
2022 26.2 15.1 0.32 0.0
2021 n/a n/a 0.06 n/a
2020 28.0 10.7 0.00 0.0
2019 31.4 11.4 0.00 0.0
2018 26.3 5.6 0.00 0.0
2017 22.1 5.5 0.00 0.0
2016 27.3 12.4 0.00 0.0
2015 11.8 2.9 3.69 0.0
2014 12.9 8.7 0.02 0.0
2013 23.0 5.2 0.00 0.0
2012 26.1 13.2 0.00 0.0
2011 29.7 9.4 0.00 0.0
2010 18.8 8.4 0.00 0.0
2009 30.9 11.0 0.00 0.0
2008 18.3 7.9 1.32 0.0
2007 20.5 5.8 0.00 0.0
2006 30.5 7.4 0.00 0.0
2005 29.3 7.2 0.00 0.0
2004 22.2 9.4 0.24 0.0
2003 30.4 8.6 0.00 0.0
2002 23.1 6.7 0.00 0.0
2001 23.5 6.0 0.00 0.0
2000 21.6 5.1 0.00 0.0
1999 27.2 10.5 0.14 0.0
1998 24.7 10.2 0.16 0.0
1997 26.5 11.6 0.02 0.0
1996 20.8 5.5 0.00 0.0
1995 27.1 4.1 0.00 0.0
1994 28.2 9.3 0.00 0.0
1993 22.5 11.4 0.00 0.0
1992 10.3 0.7 0.04 0.2
1991 26.2 10.2 0.00 0.0
1990 25.8 12.3 0.00 0.0
1989 23.2 10.7 0.02 0.0
1988 19.3 9.5 0.81 0.0
1987 16.6 4.4 0.00 0.0
1986 19.4 7.7 0.00 0.0
1985 9.0 6.4 2.19 0.0
1984 24.1 6.9 0.00 0.0
1983 23.0 9.4 0.00 0.0
1982 27.0 8.3 0.02 0.0
1981 23.2 9.7 0.00 0.0
1980 16.4 3.2 0.02 0.0
1979 24.3 9.3 0.00 0.0
1978 18.7 3.2 0.00 0.0
1977 14.4 9.0 0.03 0.0
1976 21.7 7.2 0.00 0.0
1975 22.8 10.6 0.08 0.0
1974 20.0 7.2 0.76 0.0
1973 25.0 2.2 0.00 0.0
1972 23.3 5.0 0.00 0.0
1971 31.1 17.2 0.00 0.0
1970 27.2 7.8 0.00 0.0
1969 30.0 7.8 0.00 0.0
1968 18.3 6.7 0.00 0.0
1967 25.6 10.6 0.08 0.0
1966 19.4 3.3 0.00 0.0
1965 26.1 7.2 0.00 0.0
1964 24.4 11.7 0.00 0.0
1963 21.7 10.6 0.00 0.0
1962 22.8 8.9 0.05 0.0
1961 28.9 15.0 0.00 0.0
1960 27.8 8.3 0.00 0.0
1959 22.2 8.3 0.03 0.0
1958 25.0 8.9 0.69 0.0
1957 21.1 8.3 0.00 0.0
1956 29.4 11.7 0.00 0.0
1955 19.4 5.0 0.00 0.0
1954 21.1 3.9 0.00 0.0
1953 24.4 7.2 0.00 0.0
1952 25.0 6.7 0.00 0.0
1951 27.2 5.0 0.00 0.0
1950 24.4 7.8 0.00 0.0
1949 22.2 9.4 0.00 0.0
1948 18.3 7.2 0.20 0.0
1947 17.8 5.6 0.00 0.0
1946 27.2 10.6 0.00 0.0
1945 25.0 1.7 0.00 0.0
1944 21.1 5.6 0.00 0.0
1943 19.4 7.8 1.04 0.0
1942 17.2 8.9 0.05 0.0
1941 27.2 11.7 0.00 0.0
1940 27.8 8.3 0.00 0.0
1939 21.1 10.0 0.00 0.0
1938 15.6 6.1 0.36 0.0
1937 27.8 7.2 0.00 0.0
1936 24.4 10.6 0.41 0.0
1935 25.6 6.7 0.00 0.0
1934 20.6 10.0 0.00 0.0
1933 20.6 5.0 0.00 0.0
1932 20.0 12.8 0.00 0.0
1931 30.0 12.2 0.00 0.0
1930 22.8 3.3 0.05 0.0
1929 25.0 3.9 0.00 0.0
1928 25.6 6.1 0.25 0.0
1927 16.7 9.4 2.84 0.0
1926 20.0 2.2 0.00 0.0
1925 20.6 7.2 0.00 0.0
1924 21.1 3.3 0.10 0.0
1923 20.6 10.0 0.00 0.0
1922 25.6 4.4 0.00 0.0
1921 20.0 10.0 0.10 0.0
1920 29.4 6.1 0.00 0.0
1919 27.8 12.2 0.00 0.0
1918 26.7 6.7 0.64 0.0
1917 26.7 10.0 0.51 0.0
1916 23.9 5.0 0.00 0.0
1915 27.2 7.8 0.00 0.0
1914 26.7 7.2 0.00 0.0
1913 26.1 5.0 0.00 0.0
1912 26.7 12.2 0.00 0.0
1911 15.6 5.0 0.05 0.0
1910 22.2 4.4 0.00 0.0
1909 20.6 7.2 0.48 0.0
1908 16.7 6.1 0.00 0.0
1907 24.4 4.4 0.00 0.0
1906 14.4 6.7 4.11 0.0
1905 26.7 3.9 0.00 0.0
1904 20.6 0.0 0.00 0.0
1903 20.0 5.0 0.00 0.0
1902 24.4 6.7 0.00 0.0
1901 23.3 6.1 0.00 0.0
1900 24.4 7.8 0.00 0.0
1899 11.1 7.8 2.54 0.0
1898 27.8 12.8 0.89 0.0
1897 32.2 10.6 0.00 0.0
1896 19.4 8.9 0.00 0.0
1895 18.9 8.9 0.00 0.0
1894 33.3 10.0 0.00 0.0
1893 26.7 7.2 1.63 0.0
1892 24.4 1.7 0.00 0.0
1891 21.7 3.3 0.00 0.0
1890 28.9 4.4 0.00 0.0
1889 29.4 3.9 0.00 0.0
1888 30.6 10.6 0.00 0.0
1887 16.7 8.9 0.00 0.0
1886 26.7 5.6 0.00 0.0
1885 22.2 2.2 0.00 0.0
1884 18.3 5.0 0.51 0.0
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 8/21?
For the date of Aug 21, the highest temperature ever reached in Calgary history is 33.3 °C which happened in 1894.
Highest Temperatures in Calgary on August 21
Rank Temperature Year
1 33.3 °C 1894
2 32.2 °C 1897
3 31.4 °C 2019
4 31.1 °C 1971
5 30.9 °C 2009
6 30.6 °C 1888
7 30.5 °C 2006
8 30.4 °C 2003
9 30.0 °C 1931
9 30.0 °C 1969
What's the all-time low for Calgary on 8/21?
For the date of Aug 21, the lowest temperature ever reached in Calgary history is 0.0 °C which happened in 1904.
Lowest Temperatures in Calgary on August 21
Rank Temperature Year
1 0.0 °C 1904
2 0.7 °C 1992
3 1.7 °C 1892
3 1.7 °C 1945
5 2.2 °C 1973
5 2.2 °C 1926
5 2.2 °C 1885
8 2.9 °C 2015
9 3.2 °C 1978
9 3.2 °C 1980
Lowest High Temperatures in Calgary on August 21
Rank Temperature Year
1 9.0 °C 1985
2 10.3 °C 1992
3 11.1 °C 1899
4 11.8 °C 2015
5 12.9 °C 2014
6 14.4 °C 1977
6 14.4 °C 1906
8 15.6 °C 1911
8 15.6 °C 1938
10 16.4 °C 1980
What's the most it has ever rained in Calgary on 8/21?
For the date of Aug 21, the most precipitation ever recorded in Calgary history is 4.11 cm which happened in 1906.
All-Time Most Precipitation in Calgary on August 21
Rank Precipitation Year
1 4.11 cm 1906
2 3.69 cm 2015
3 2.84 cm 1927
4 2.54 cm 1899
5 2.19 cm 1985
6 1.63 cm 1893
7 1.32 cm 2008
8 1.04 cm 1943
9 0.89 cm 1898
10 0.81 cm 1988
All-Time Most Snow in Calgary on August 21
Rank Precipitation Year
1 0.2 cm 1992
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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