Ottawa August 15 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of August 15.
August 15 All-Time Records
1889–2024
Highest temperature 36.7 °C 1944
Lowest temperature 5.0 °C 1924
Lowest daily high 15.0 °C 1979
Highest daily low 21.7 °C 1947
Most precipitation 4.37 cm 2010
Most snow none -
August 15 Average Weather
1991–2020 1
Average high 25.8 °C
Average low 14.9 °C
Chance precipitation 37.4%
Chance snow 0%
Ottawa August 15 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 24.5 14.0 0.00 0.0
2022 28.5 11.5 0.00 0.0
2021 24.5 9.5 0.00 0.0
2020 28.0 15.0 0.00 0.0
2019 24.5 8.0 0.00 0.0
2018 25.5 18.0 0.12 0.0
2017 26.0 18.0 0.00 0.0
2016 27.5 15.0 0.00 0.0
2015 28.2 18.9 0.00 0.0
2014 16.5 11.4 0.12 0.0
2013 24.4 11.7 0.00 0.0
2012 26.5 16.2 0.00 0.0
2011 25.0 18.2 0.00 0.0
2010 23.5 17.9 4.37 0.0
2009 30.9 17.5 0.00 0.0
2008 25.4 12.3 0.06 0.0
2007 24.4 16.2 0.04 0.0
2006 25.5 16.0 0.00 0.0
2005 27.5 14.0 0.00 0.0
2004 24.4 12.3 0.00 0.0
2003 31.0 17.0 0.00 0.0
2002 28.3 21.6 0.82 0.0
2001 30.6 10.0 0.00 0.0
2000 27.6 14.9 0.00 0.0
1999 25.1 12.0 0.00 0.0
1998 30.5 16.7 0.67 0.0
1997 25.1 13.0 0.58 0.0
1996 28.3 12.7 0.32 0.0
1995 32.3 18.7 0.00 0.0
1994 17.6 9.5 0.00 0.0
1993 28.6 14.2 0.00 0.0
1992 23.0 8.7 0.00 0.0
1991 30.3 16.2 0.00 0.0
1990 21.4 13.9 0.58 0.0
1989 29.5 16.3 0.32 0.0
1988 25.0 21.1 0.03 0.0
1987 26.8 19.8 0.00 0.0
1986 26.0 17.4 0.04 0.0
1985 22.5 17.0 0.55 0.0
1984 28.6 18.1 0.00 0.0
1983 28.5 14.5 0.00 0.0
1982 29.0 13.0 0.00 0.0
1981 18.0 15.0 1.70 0.0
1980 21.0 16.0 0.04 0.0
1979 15.0 11.5 0.04 0.0
1978 33.0 19.5 0.00 0.0
1977 22.5 11.0 0.00 0.0
1976 20.6 15.0 0.79 0.0
1975 27.8 11.7 0.00 0.0
1974 23.9 11.1 0.00 0.0
1973 24.4 16.7 0.00 0.0
1972 22.2 10.0 0.00 0.0
1971 21.1 11.7 0.00 0.0
1970 33.3 17.8 0.00 0.0
1969 31.7 18.9 0.00 0.0
1968 21.1 10.0 0.00 0.0
1967 29.4 11.7 0.00 0.0
1966 20.0 15.0 0.00 0.0
1965 32.2 18.3 0.00 0.0
1964 18.9 10.0 0.00 0.0
1963 19.4 8.3 0.30 0.0
1962 24.4 11.1 0.00 0.0
1961 25.0 13.3 1.30 0.0
1960 22.2 12.8 0.00 0.0
1959 31.7 20.6 0.58 0.0
1958 23.3 15.6 0.00 0.0
1957 18.9 12.2 0.10 0.0
1956 23.9 15.0 0.00 0.0
1955 29.4 20.6 0.28 0.0
1954 24.4 12.8 0.00 0.0
1953 25.0 18.3 0.00 0.0
1952 28.3 13.3 0.00 0.0
1951 23.9 12.2 0.69 0.0
1950 26.7 8.9 0.38 0.0
1949 25.6 10.0 0.00 0.0
1948 26.7 13.3 0.00 0.0
1947 25.6 21.7 0.00 0.0
1946 26.7 9.4 0.05 0.0
1945 20.6 11.7 0.00 0.0
1944 36.7 19.4 0.00 0.0
1943 25.0 15.0 0.61 0.0
1942 28.9 13.9 0.00 0.0
1941 22.2 10.6 0.00 0.0
1940 27.2 10.6 0.00 0.0
1939 27.8 13.3 0.00 0.0
1938 33.9 19.4 0.00 0.0
1937 28.9 11.1 0.00 0.0
1936 17.2 11.7 0.91 0.0
1935 31.1 13.3 0.00 0.0
1934 23.3 12.2 0.00 0.0
1933 27.2 8.9 0.00 0.0
1932 29.4 12.8 0.00 0.0
1931 30.6 12.8 0.00 0.0
1930 23.3 11.1 0.71 0.0
1929 20.0 12.8 0.10 0.0
1928 30.6 15.0 0.00 0.0
1927 21.1 8.9 0.00 0.0
1926 22.8 7.8 0.00 0.0
1925 27.2 12.2 0.00 0.0
1924 21.7 5.0 0.00 0.0
1923 18.9 11.1 0.08 0.0
1922 34.4 16.7 0.00 0.0
1921 21.7 8.9 0.00 0.0
1920 28.9 18.9 0.10 0.0
1919 22.8 13.3 0.00 0.0
1918 25.6 11.7 0.00 0.0
1917 25.6 18.3 0.15 0.0
1916 26.7 9.4 0.00 0.0
1915 23.3 16.7 1.07 0.0
1914 24.4 11.1 0.05 0.0
1913 32.2 15.0 0.00 0.0
1912 23.9 13.3 0.00 0.0
1911 28.9 17.2 0.81 0.0
1910 24.4 16.1 1.65 0.0
1909 26.1 15.6 0.86 0.0
1908 24.4 13.9 0.23 0.0
1907 24.4 6.1 0.00 0.0
1906 25.0 6.7 0.00 0.0
1905 20.0 8.3 2.01 0.0
1904 23.3 13.3 0.00 0.0
1903 24.4 8.9 0.00 0.0
1902 21.1 12.8 0.15 0.0
1901 25.6 15.6 0.00 0.0
1900 26.7 15.0 0.58 0.0
1899 24.4 8.3 0.00 0.0
1898 28.3 11.1 0.00 0.0
1897 26.1 15.0 0.51 0.0
1896 32.2 12.2 0.00 0.0
1895 26.7 12.8 0.23 0.0
1894 21.1 15.6 0.00 0.0
1893 28.3 11.1 0.00 0.0
1892 25.6 13.3 0.00 0.0
1891 23.3 14.4 0.15 0.0
1890 19.4 12.2 0.00 0.0
What's the all-time high for Ottawa on 8/15?
For the date of Aug 15, the highest temperature ever reached in Ottawa history is 36.7 °C which happened in 1944.
Highest Temperatures in Ottawa on August 15
Rank Temperature Year
1 36.7 °C 1944
2 34.4 °C 1922
3 33.9 °C 1938
4 33.3 °C 1970
5 33.0 °C 1978
6 32.3 °C 1995
7 32.2 °C 1896
7 32.2 °C 1913
7 32.2 °C 1965
10 31.7 °C 1969
10 31.7 °C 1959
What's the all-time low for Ottawa on 8/15?
For the date of Aug 15, the lowest temperature ever reached in Ottawa history is 5.0 °C which happened in 1924.
Lowest Temperatures in Ottawa on August 15
Rank Temperature Year
1 5.0 °C 1924
2 6.1 °C 1907
3 6.7 °C 1906
4 7.8 °C 1926
5 8.0 °C 2019
6 8.3 °C 1963
6 8.3 °C 1905
6 8.3 °C 1899
9 8.7 °C 1992
10 8.9 °C 1921
10 8.9 °C 1950
10 8.9 °C 1927
10 8.9 °C 1903
10 8.9 °C 1933
Lowest High Temperatures in Ottawa on August 15
Rank Temperature Year
1 15.0 °C 1979
2 16.5 °C 2014
3 17.2 °C 1936
4 17.6 °C 1994
5 18.0 °C 1981
6 18.9 °C 1923
6 18.9 °C 1957
6 18.9 °C 1964
9 19.4 °C 1890
9 19.4 °C 1963
What's the most it has ever rained in Ottawa on 8/15?
For the date of Aug 15, the most precipitation ever recorded in Ottawa history is 4.37 cm which happened in 2010.
All-Time Most Precipitation in Ottawa on August 15
Rank Precipitation Year
1 4.37 cm 2010
2 2.01 cm 1905
3 1.70 cm 1981
4 1.65 cm 1910
5 1.30 cm 1961
6 1.07 cm 1915
7 0.91 cm 1936
8 0.86 cm 1909
9 0.82 cm 2002
10 0.81 cm 1911
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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