Ottawa August 4 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of August 4.
August 4 All-Time Records
1889–2024
Highest temperature 36.1 °C 1944
Lowest temperature 7.2 °C 1960
Lowest daily high 15.6 °C 1929
Highest daily low 21.7 °C 1989
Most precipitation 8.20 cm 1988
Most snow none -
August 4 Average Weather
1991–2020 1
Average high 26.5 °C
Average low 15.6 °C
Chance precipitation 37.0%
Chance snow 0%
Ottawa August 4 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 26.0 15.0 0.32 0.0
2022 30.0 20.0 0.42 0.0
2021 28.0 14.0 0.00 0.0
2020 21.0 17.0 2.22 0.0
2019 25.0 12.0 0.00 0.0
2018 30.0 18.5 0.00 0.0
2017 28.0 18.0 0.16 0.0
2016 33.5 18.0 0.00 0.0
2015 24.8 14.8 0.12 0.0
2014 27.5 14.5 0.28 0.0
2013 20.5 14.5 0.09 0.0
2012 35.6 19.0 0.00 0.0
2011 27.8 15.4 0.00 0.0
2010 31.2 18.8 2.64 0.0
2009 28.0 19.0 0.94 0.0
2008 26.9 15.1 0.00 0.0
2007 24.6 17.7 0.00 0.0
2006 29.1 19.0 0.00 0.0
2005 33.8 19.5 0.09 0.0
2004 25.2 13.8 0.12 0.0
2003 28.3 20.5 0.00 0.0
2002 27.0 15.9 0.02 0.0
2001 29.7 17.2 0.00 0.0
2000 23.8 11.5 0.00 0.0
1999 22.8 14.2 0.04 0.0
1998 29.1 17.8 0.00 0.0
1997 25.6 9.7 0.00 0.0
1996 29.1 14.4 0.00 0.0
1995 26.7 18.6 0.02 0.0
1994 23.1 16.4 4.29 0.0
1993 24.8 17.2 0.00 0.0
1992 18.0 14.3 3.80 0.0
1991 21.9 16.5 1.96 0.0
1990 29.6 17.5 0.25 0.0
1989 29.4 21.7 0.72 0.0
1988 32.1 21.5 8.20 0.0
1987 25.4 15.5 0.06 0.0
1986 23.6 12.3 0.00 0.0
1985 28.9 13.4 0.00 0.0
1984 32.1 17.8 0.00 0.0
1983 26.0 21.0 0.00 0.0
1982 23.5 14.5 0.00 0.0
1981 30.0 16.5 5.12 0.0
1980 27.0 17.0 0.00 0.0
1979 29.0 16.5 0.38 0.0
1978 23.5 14.5 0.00 0.0
1977 28.5 17.5 0.88 0.0
1976 28.3 11.1 0.05 0.0
1975 30.6 21.7 0.00 0.0
1974 24.4 20.0 0.03 0.0
1973 26.7 17.8 0.00 0.0
1972 18.3 7.8 0.00 0.0
1971 21.7 13.3 0.00 0.0
1970 21.7 13.9 0.00 0.0
1969 27.2 16.1 0.00 0.0
1968 28.3 17.8 0.00 0.0
1967 26.1 20.0 0.43 0.0
1966 23.9 13.3 0.00 0.0
1965 24.4 11.1 0.00 0.0
1964 25.6 10.6 0.00 0.0
1963 22.8 17.2 1.14 0.0
1962 27.8 12.8 0.99 0.0
1961 27.2 12.8 0.00 0.0
1960 23.9 7.2 0.00 0.0
1959 27.2 12.2 0.66 0.0
1958 25.6 17.2 0.00 0.0
1957 24.4 13.9 0.00 0.0
1956 27.2 13.3 0.00 0.0
1955 35.6 17.2 0.94 0.0
1954 24.4 15.6 0.00 0.0
1953 18.9 11.7 3.89 0.0
1952 21.7 14.4 2.34 0.0
1951 19.4 8.9 0.00 0.0
1950 20.6 13.9 0.00 0.0
1949 29.4 14.4 0.00 0.0
1948 23.9 13.9 0.00 0.0
1947 30.0 13.3 0.00 0.0
1946 26.7 12.8 0.84 0.0
1945 21.1 11.7 0.00 0.0
1944 36.1 18.9 0.00 0.0
1943 18.9 14.4 0.33 0.0
1942 21.1 12.2 0.00 0.0
1941 30.6 12.8 0.00 0.0
1940 29.4 18.3 0.20 0.0
1939 25.6 13.9 0.10 0.0
1938 31.7 20.0 0.00 0.0
1937 26.7 18.9 0.05 0.0
1936 24.4 17.8 0.00 0.0
1935 27.8 10.0 0.51 0.0
1934 21.7 9.4 0.53 0.0
1933 25.0 7.2 0.00 0.0
1932 28.3 17.2 0.08 0.0
1931 30.6 14.4 0.00 0.0
1930 30.0 19.4 0.25 0.0
1929 15.6 10.6 0.38 0.0
1928 30.6 20.6 1.22 0.0
1927 25.0 8.9 0.00 0.0
1926 25.6 16.7 0.00 0.0
1925 28.9 12.2 0.00 0.0
1924 24.4 18.3 0.18 0.0
1923 30.0 14.4 0.00 0.0
1922 26.1 15.0 0.05 0.0
1921 27.2 11.7 0.00 0.0
1920 26.7 9.4 0.00 0.0
1919 27.8 15.0 0.00 0.0
1918 23.3 10.6 0.00 0.0
1917 25.6 12.2 0.00 0.0
1916 32.8 16.7 0.00 0.0
1915 18.9 11.1 2.16 0.0
1914 25.0 7.8 0.00 0.0
1913 23.9 11.7 0.13 0.0
1912 19.4 12.2 0.33 0.0
1911 31.7 21.1 0.53 0.0
1910 27.8 17.2 1.96 0.0
1909 30.6 13.3 0.00 0.0
1908 30.6 13.9 1.07 0.0
1907 22.2 7.8 0.00 0.0
1906 31.1 17.8 0.33 0.0
1905 26.7 10.0 0.00 0.0
1904 27.8 10.6 0.00 0.0
1903 20.0 11.7 0.15 0.0
1902 25.0 13.9 0.23 0.0
1901 23.9 13.3 0.00 0.0
1900 23.3 8.9 0.00 0.0
1899 30.0 15.6 0.00 0.0
1898 28.3 19.4 0.10 0.0
1897 24.4 16.7 0.43 0.0
1896 30.6 18.3 0.00 0.0
1895 25.6 15.0 0.00 0.0
1894 16.7 11.7 0.00 0.0
1893 31.1 11.7 0.00 0.0
1892 25.6 16.7 0.00 0.0
1891 26.7 10.6 0.00 0.0
1890 31.7 21.1 1.02 0.0
What's the all-time high for Ottawa on 8/4?
For the date of Aug 4, the highest temperature ever reached in Ottawa history is 36.1 °C which happened in 1944.
Highest Temperatures in Ottawa on August 4
Rank Temperature Year
1 36.1 °C 1944
2 35.6 °C 1955
2 35.6 °C 2012
4 33.8 °C 2005
5 33.5 °C 2016
6 32.8 °C 1916
7 32.1 °C 1984
7 32.1 °C 1988
9 31.7 °C 1911
9 31.7 °C 1938
9 31.7 °C 1890
What's the all-time low for Ottawa on 8/4?
For the date of Aug 4, the lowest temperature ever reached in Ottawa history is 7.2 °C which has happened 2 times, most recently in 1960.
Lowest Temperatures in Ottawa on August 4
Rank Temperature Year
1 7.2 °C 1960
1 7.2 °C 1933
3 7.8 °C 1914
3 7.8 °C 1907
3 7.8 °C 1972
6 8.9 °C 1927
6 8.9 °C 1900
6 8.9 °C 1951
9 9.4 °C 1934
9 9.4 °C 1920
Lowest High Temperatures in Ottawa on August 4
Rank Temperature Year
1 15.6 °C 1929
2 16.7 °C 1894
3 18.0 °C 1992
4 18.3 °C 1972
5 18.9 °C 1943
5 18.9 °C 1953
5 18.9 °C 1915
8 19.4 °C 1912
8 19.4 °C 1951
10 20.0 °C 1903
What's the most it has ever rained in Ottawa on 8/4?
For the date of Aug 4, the most precipitation ever recorded in Ottawa history is 8.20 cm which happened in 1988.
All-Time Most Precipitation in Ottawa on August 4
Rank Precipitation Year
1 8.20 cm 1988
2 5.12 cm 1981
3 4.29 cm 1994
4 3.89 cm 1953
5 3.80 cm 1992
6 2.64 cm 2010
7 2.34 cm 1952
8 2.22 cm 2020
9 2.16 cm 1915
10 1.96 cm 1910
10 1.96 cm 1991
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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