Ottawa August 25 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of August 25.
August 25 All-Time Records
1889–2024
Highest temperature 35.6 °C 1909
Lowest temperature 1.7 °C 1942
Lowest daily high 15.6 °C 1971
Highest daily low 21.7 °C 1968
Most precipitation 4.57 cm 1945
Most snow none -
August 25 Average Weather
1991–2020 1
Average high 24.9 °C
Average low 13.9 °C
Chance precipitation 36.9%
Chance snow 0%
Ottawa August 25 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 23.5 16.0 0.00 0.0
2022 24.5 16.0 1.08 0.0
2021 33.5 17.5 0.00 0.0
2020 23.5 20.0 0.00 0.0
2019 25.5 8.0 0.00 0.0
2018 27.5 15.5 0.12 0.0
2017 20.0 10.0 0.00 0.0
2016 30.0 20.5 0.24 0.0
2015 21.7 13.1 0.00 0.0
2014 27.8 13.5 0.00 0.0
2013 25.8 13.1 0.06 0.0
2012 32.5 16.2 0.00 0.0
2011 26.0 19.6 0.00 0.0
2010 24.5 14.3 0.16 0.0
2009 26.3 10.5 0.00 0.0
2008 20.4 11.9 0.00 0.0
2007 27.5 21.0 0.67 0.0
2006 20.8 11.0 0.00 0.0
2005 28.1 11.7 0.00 0.0
2004 26.0 9.0 0.00 0.0
2003 21.8 15.0 0.04 0.0
2002 22.7 15.1 0.00 0.0
2001 27.0 8.5 0.00 0.0
2000 27.3 14.2 0.00 0.0
1999 30.7 17.2 0.00 0.0
1998 23.0 15.3 0.63 0.0
1997 25.5 11.5 0.00 0.0
1996 29.9 13.2 0.02 0.0
1995 21.3 9.3 0.00 0.0
1994 24.2 14.2 0.02 0.0
1993 30.0 18.9 0.00 0.0
1992 30.0 18.2 0.00 0.0
1991 26.2 8.9 0.00 0.0
1990 29.8 14.8 0.00 0.0
1989 20.3 6.7 0.00 0.0
1988 21.5 12.7 1.06 0.0
1987 21.6 8.1 0.00 0.0
1986 20.8 8.4 0.00 0.0
1985 18.7 14.5 0.20 0.0
1984 28.6 9.5 0.00 0.0
1983 28.5 15.5 0.00 0.0
1982 17.5 14.0 2.56 0.0
1981 21.5 11.5 0.00 0.0
1980 30.5 15.5 0.00 0.0
1979 25.0 20.5 0.00 0.0
1978 21.0 9.5 0.00 0.0
1977 19.0 8.5 0.00 0.0
1976 28.3 11.7 0.00 0.0
1975 28.9 16.7 0.00 0.0
1974 24.4 9.4 0.00 0.0
1973 26.1 10.6 0.00 0.0
1972 27.8 18.9 0.36 0.0
1971 15.6 3.9 0.00 0.0
1970 25.0 13.9 0.00 0.0
1969 26.7 17.8 0.00 0.0
1968 26.7 21.7 0.05 0.0
1967 26.1 11.1 0.00 0.0
1966 21.7 10.0 0.13 0.0
1965 18.9 13.3 0.46 0.0
1964 26.7 9.4 0.89 0.0
1963 21.7 7.2 0.00 0.0
1962 27.2 13.3 0.00 0.0
1961 26.1 18.3 0.25 0.0
1960 23.9 6.1 0.00 0.0
1959 27.2 17.8 0.00 0.0
1958 22.2 15.6 0.00 0.0
1957 23.9 17.8 0.00 0.0
1956 21.7 10.0 0.61 0.0
1955 26.7 8.9 0.00 0.0
1954 31.1 17.2 0.20 0.0
1953 29.4 13.9 0.00 0.0
1952 27.2 8.9 0.00 0.0
1951 26.1 10.0 0.00 0.0
1950 28.3 15.6 0.05 0.0
1949 27.2 8.3 0.00 0.0
1948 35.0 18.3 0.00 0.0
1947 32.8 21.7 0.00 0.0
1946 22.2 8.9 0.13 0.0
1945 17.2 12.8 4.57 0.0
1944 22.8 6.1 0.00 0.0
1943 22.8 11.7 0.00 0.0
1942 22.2 1.7 0.00 0.0
1941 23.9 11.7 0.51 0.0
1940 18.9 3.3 0.00 0.0
1939 25.0 12.8 0.00 0.0
1938 22.8 10.0 0.00 0.0
1937 30.0 13.3 0.00 0.0
1936 16.7 9.4 0.00 0.0
1935 23.9 4.4 0.00 0.0
1934 20.6 8.9 0.00 0.0
1933 22.8 18.3 0.00 0.0
1932 31.7 15.6 0.00 0.0
1931 22.8 14.4 0.23 0.0
1930 26.1 14.4 0.00 0.0
1929 29.4 10.0 0.00 0.0
1928 22.8 15.0 0.30 0.0
1927 20.0 8.9 0.00 0.0
1926 20.6 11.7 0.05 0.0
1925 32.8 11.7 0.00 0.0
1924 26.7 15.6 0.00 0.0
1923 18.3 9.4 0.38 0.0
1922 25.6 20.6 1.52 0.0
1921 27.2 14.4 0.00 0.0
1920 27.8 12.8 0.00 0.0
1919 22.8 13.9 0.05 0.0
1918 28.9 13.3 0.00 0.0
1917 22.2 12.2 0.00 0.0
1916 26.1 14.4 0.30 0.0
1915 21.1 16.7 0.10 0.0
1914 18.9 6.1 0.00 0.0
1913 17.2 3.3 0.00 0.0
1912 23.9 12.2 3.00 0.0
1911 25.0 8.3 0.00 0.0
1910 27.8 21.7 0.08 0.0
1909 35.6 17.2 0.00 0.0
1908 22.2 6.1 0.00 0.0
1907 21.7 8.3 0.00 0.0
1906 26.7 10.6 0.00 0.0
1905 24.4 8.3 0.00 0.0
1904 27.8 11.7 0.41 0.0
1903 18.9 11.1 0.64 0.0
1902 27.2 12.2 0.00 0.0
1901 26.1 12.2 0.00 0.0
1900 32.8 15.6 0.00 0.0
1899 27.2 17.8 0.08 0.0
1898 21.7 15.6 2.03 0.0
1897 22.2 12.2 1.83 0.0
1896 23.3 7.2 0.00 0.0
1895 22.8 13.3 0.00 0.0
1894 27.2 16.1 0.00 0.0
1893 27.2 15.6 0.00 0.0
1892 18.9 15.0 1.22 0.0
1891 20.6 13.9 0.66 0.0
1890 25.6 7.2 0.00 0.0
What's the all-time high for Ottawa on 8/25?
For the date of Aug 25, the highest temperature ever reached in Ottawa history is 35.6 °C which happened in 1909.
Highest Temperatures in Ottawa on August 25
Rank Temperature Year
1 35.6 °C 1909
2 35.0 °C 1948
3 33.5 °C 2021
4 32.8 °C 1900
4 32.8 °C 1925
4 32.8 °C 1947
7 32.5 °C 2012
8 31.7 °C 1932
9 31.1 °C 1954
10 30.7 °C 1999
What's the all-time low for Ottawa on 8/25?
For the date of Aug 25, the lowest temperature ever reached in Ottawa history is 1.7 °C which happened in 1942.
Lowest Temperatures in Ottawa on August 25
Rank Temperature Year
1 1.7 °C 1942
2 3.3 °C 1940
2 3.3 °C 1913
4 3.9 °C 1971
5 4.4 °C 1935
6 6.1 °C 1960
6 6.1 °C 1914
6 6.1 °C 1944
6 6.1 °C 1908
10 6.7 °C 1989
Lowest High Temperatures in Ottawa on August 25
Rank Temperature Year
1 15.6 °C 1971
2 16.7 °C 1936
3 17.2 °C 1945
3 17.2 °C 1913
5 17.5 °C 1982
6 18.3 °C 1923
7 18.7 °C 1985
8 18.9 °C 1940
8 18.9 °C 1965
8 18.9 °C 1903
8 18.9 °C 1892
8 18.9 °C 1914
What's the most it has ever rained in Ottawa on 8/25?
For the date of Aug 25, the most precipitation ever recorded in Ottawa history is 4.57 cm which happened in 1945.
All-Time Most Precipitation in Ottawa on August 25
Rank Precipitation Year
1 4.57 cm 1945
2 3.00 cm 1912
3 2.56 cm 1982
4 2.03 cm 1898
5 1.83 cm 1897
6 1.52 cm 1922
7 1.22 cm 1892
8 1.08 cm 2022
9 1.06 cm 1988
10 0.89 cm 1964
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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