Ottawa August 20 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of August 20.
August 20 All-Time Records
1889–2024
Highest temperature 36.7 °C 1916
Lowest temperature 5.0 °C 1926
Lowest daily high 17.8 °C 1940
Highest daily low 22.5 °C 2015
Most precipitation 4.27 cm 1904
Most snow none -
August 20 Average Weather
1991–2020 1
Average high 25.3 °C
Average low 14.3 °C
Chance precipitation 36.4%
Chance snow 0%
Ottawa August 20 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 27.5 14.5 0.00 0.0
2022 30.0 16.5 0.12 0.0
2021 33.0 17.0 0.00 0.0
2020 20.0 9.0 0.19 0.0
2019 28.5 19.0 0.10 0.0
2018 27.5 13.0 0.00 0.0
2017 26.0 16.0 0.00 0.0
2016 30.0 16.0 0.62 0.0
2015 28.3 22.5 2.10 0.0
2014 25.2 13.4 1.58 0.0
2013 30.7 15.9 0.00 0.0
2012 23.4 9.7 0.00 0.0
2011 29.0 14.6 1.47 0.0
2010 22.5 10.4 0.00 0.0
2009 23.2 13.0 0.94 0.0
2008 22.0 7.0 0.00 0.0
2007 20.6 6.3 0.00 0.0
2006 17.9 16.5 0.31 0.0
2005 22.5 15.6 0.20 0.0
2004 22.5 7.5 0.00 0.0
2003 30.4 18.2 0.00 0.0
2002 25.6 13.5 0.00 0.0
2001 25.0 18.0 0.10 0.0
2000 19.3 9.2 0.00 0.0
1999 27.1 13.1 0.00 0.0
1998 24.5 7.1 0.46 0.0
1997 24.5 8.0 0.08 0.0
1996 25.6 13.0 0.24 0.0
1995 30.5 14.1 0.00 0.0
1994 28.3 17.0 1.90 0.0
1993 22.3 18.2 0.37 0.0
1992 19.1 10.6 0.00 0.0
1991 24.9 13.2 0.00 0.0
1990 22.4 10.3 0.00 0.0
1989 23.9 17.8 1.30 0.0
1988 22.4 12.5 0.80 0.0
1987 23.8 13.4 0.00 0.0
1986 25.7 13.8 0.00 0.0
1985 22.1 13.4 0.04 0.0
1984 19.7 8.4 0.00 0.0
1983 26.0 20.0 0.00 0.0
1982 23.0 17.0 0.00 0.0
1981 27.0 12.0 0.00 0.0
1980 24.5 17.5 0.00 0.0
1979 23.5 11.5 0.00 0.0
1978 22.0 16.5 0.00 0.0
1977 18.5 9.5 0.00 0.0
1976 28.9 16.7 0.00 0.0
1975 23.9 10.0 0.00 0.0
1974 28.3 13.3 0.00 0.0
1973 27.2 16.7 0.00 0.0
1972 23.9 8.9 0.00 0.0
1971 26.7 18.3 0.08 0.0
1970 28.9 20.6 0.05 0.0
1969 20.6 8.3 0.00 0.0
1968 29.4 15.0 0.00 0.0
1967 20.6 16.1 0.36 0.0
1966 22.8 11.7 0.00 0.0
1965 20.0 12.8 0.00 0.0
1964 18.3 11.7 0.00 0.0
1963 24.4 8.3 0.00 0.0
1962 28.9 14.4 0.69 0.0
1961 21.7 14.4 0.00 0.0
1960 26.1 21.7 0.03 0.0
1959 31.1 16.7 0.00 0.0
1958 26.1 8.9 0.53 0.0
1957 22.2 8.9 0.00 0.0
1956 20.6 6.7 0.00 0.0
1955 34.4 17.8 0.94 0.0
1954 24.4 13.9 0.00 0.0
1953 21.1 5.6 0.00 0.0
1952 26.7 12.2 0.97 0.0
1951 25.6 10.6 0.13 0.0
1950 20.6 12.2 0.00 0.0
1949 22.8 10.0 0.00 0.0
1948 25.6 17.8 0.38 0.0
1947 27.2 17.2 0.00 0.0
1946 19.4 11.7 0.00 0.0
1945 31.1 12.8 0.00 0.0
1944 26.1 5.6 0.00 0.0
1943 26.1 10.6 0.00 0.0
1942 30.6 18.3 0.10 0.0
1941 21.1 10.6 0.00 0.0
1940 17.8 10.0 0.00 0.0
1939 23.9 17.2 0.18 0.0
1938 31.1 15.0 0.00 0.0
1937 26.1 17.2 0.56 0.0
1936 20.6 8.9 0.00 0.0
1935 32.2 16.7 0.81 0.0
1934 17.8 13.3 0.00 0.0
1933 24.4 7.8 0.00 0.0
1932 21.1 8.9 0.00 0.0
1931 26.7 12.8 0.00 0.0
1930 22.2 10.6 0.00 0.0
1929 23.9 8.9 0.00 0.0
1928 27.2 9.4 0.00 0.0
1927 25.6 13.3 0.00 0.0
1926 21.1 5.0 0.00 0.0
1925 23.9 16.1 0.13 0.0
1924 22.2 8.9 1.22 0.0
1923 21.7 5.6 0.00 0.0
1922 19.4 8.3 0.00 0.0
1921 25.0 16.7 0.71 0.0
1920 28.9 12.8 0.00 0.0
1919 26.7 15.6 0.00 0.0
1918 27.2 8.3 0.00 0.0
1917 27.2 17.2 0.15 0.0
1916 36.7 18.9 0.00 0.0
1915 27.8 12.2 0.00 0.0
1914 24.4 14.4 0.00 0.0
1913 25.6 11.7 0.00 0.0
1912 20.6 8.9 0.00 0.0
1911 23.9 10.0 0.00 0.0
1910 24.4 7.8 0.00 0.0
1909 23.3 13.9 0.00 0.0
1908 22.2 7.8 0.00 0.0
1907 24.4 11.7 0.15 0.0
1906 31.1 19.4 1.88 0.0
1905 25.0 13.3 0.53 0.0
1904 20.0 12.2 4.27 0.0
1903 24.4 13.9 3.53 0.0
1902 26.7 11.1 0.00 0.0
1901 26.7 17.2 0.30 0.0
1900 22.2 11.7 0.00 0.0
1899 34.4 17.8 0.00 0.0
1898 27.8 8.3 0.00 0.0
1897 18.9 8.9 0.00 0.0
1896 23.9 7.8 0.00 0.0
1895 20.0 8.3 0.10 0.0
1894 20.0 11.1 0.15 0.0
1893 25.0 13.3 0.00 0.0
1892 23.3 11.1 0.00 0.0
1891 29.4 10.0 0.00 0.0
1890 23.3 8.9 0.00 0.0
What's the all-time high for Ottawa on 8/20?
For the date of Aug 20, the highest temperature ever reached in Ottawa history is 36.7 °C which happened in 1916.
Highest Temperatures in Ottawa on August 20
Rank Temperature Year
1 36.7 °C 1916
2 34.4 °C 1955
2 34.4 °C 1899
4 33.0 °C 2021
5 32.2 °C 1935
6 31.1 °C 1906
6 31.1 °C 1959
6 31.1 °C 1945
6 31.1 °C 1938
10 30.7 °C 2013
What's the all-time low for Ottawa on 8/20?
For the date of Aug 20, the lowest temperature ever reached in Ottawa history is 5.0 °C which happened in 1926.
Lowest Temperatures in Ottawa on August 20
Rank Temperature Year
1 5.0 °C 1926
2 5.6 °C 1944
2 5.6 °C 1953
2 5.6 °C 1923
5 6.3 °C 2007
6 6.7 °C 1956
7 7.0 °C 2008
8 7.1 °C 1998
9 7.5 °C 2004
10 7.8 °C 1896
10 7.8 °C 1908
10 7.8 °C 1933
10 7.8 °C 1910
Lowest High Temperatures in Ottawa on August 20
Rank Temperature Year
1 17.8 °C 1940
1 17.8 °C 1934
3 17.9 °C 2006
4 18.3 °C 1964
5 18.5 °C 1977
6 18.9 °C 1897
7 19.1 °C 1992
8 19.3 °C 2000
9 19.4 °C 1946
9 19.4 °C 1922
What's the most it has ever rained in Ottawa on 8/20?
For the date of Aug 20, the most precipitation ever recorded in Ottawa history is 4.27 cm which happened in 1904.
All-Time Most Precipitation in Ottawa on August 20
Rank Precipitation Year
1 4.27 cm 1904
2 3.53 cm 1903
3 2.10 cm 2015
4 1.90 cm 1994
5 1.88 cm 1906
6 1.58 cm 2014
7 1.47 cm 2011
8 1.30 cm 1989
9 1.22 cm 1924
10 0.97 cm 1952
Weather Station Details
Years Station Coordinates
1889–2024 Ottawa CDA location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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