Ottawa September 25 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of September 25.
September 25 All-Time Records
1889–2024
Highest temperature 33.0 °C 2017
Lowest temperature -0.6 °C 1963
Lowest daily high 9.4 °C 1936
Highest daily low 18.3 °C 1958
Most precipitation 3.08 cm 2005
Most snow none -
September 25 Average Weather
1991–2020 1
Average high 19.0 °C
Average low 8.6 °C
Chance precipitation 43.0%
Chance snow 0%
Ottawa September 25 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 26.0 12.0 0.00 0.0
2022 17.5 9.0 0.48 0.0
2021 23.0 7.0 0.00 0.0
2020 18.0 10.5 0.00 0.0
2019 23.5 5.0 0.20 0.0
2018 21.5 7.0 0.40 0.0
2017 33.0 16.5 0.00 0.0
2016 17.0 3.5 0.00 0.0
2015 16.6 10.6 0.00 0.0
2014 24.0 7.2 0.00 0.0
2013 20.7 3.0 0.00 0.0
2012 20.5 10.0 0.00 0.0
2011 25.4 14.8 0.00 0.0
2010 19.2 14.2 1.20 0.0
2009 15.4 6.9 0.00 0.0
2008 26.0 7.1 0.00 0.0
2007 29.4 13.2 0.80 0.0
2006 15.4 3.4 0.44 0.0
2005 19.8 9.2 3.08 0.0
2004 24.0 17.6 0.00 0.0
2003 18.5 11.5 0.24 0.0
2002 21.7 8.1 0.00 0.0
2001 15.8 11.1 0.26 0.0
2000 13.9 0.2 0.00 0.0
1999 15.6 6.1 0.00 0.0
1998 22.4 10.2 0.02 0.0
1997 14.5 5.5 0.18 0.0
1996 14.6 5.5 0.00 0.0
1995 13.7 2.9 0.10 0.0
1994 19.3 15.1 0.26 0.0
1993 20.6 6.5 0.66 0.0
1992 18.8 3.8 0.00 0.0
1991 11.6 7.5 0.40 0.0
1990 19.3 8.5 0.20 0.0
1989 18.0 1.1 0.00 0.0
1988 20.6 4.0 0.00 0.0
1987 12.2 3.5 0.02 0.0
1986 19.3 8.6 0.02 0.0
1985 19.6 3.6 0.00 0.0
1984 22.5 16.0 0.32 0.0
1983 19.5 3.5 0.16 0.0
1982 19.5 12.0 0.02 0.0
1981 18.5 8.5 0.00 0.0
1980 12.5 4.5 1.22 0.0
1979 20.5 7.5 0.00 0.0
1978 11.5 7.5 0.00 0.0
1977 11.0 8.5 0.28 0.0
1976 12.8 3.3 0.03 0.0
1975 12.2 6.7 3.02 0.0
1974 11.1 7.2 0.48 0.0
1973 17.2 7.2 0.00 0.0
1972 21.7 12.2 0.25 0.0
1971 17.8 9.4 0.00 0.0
1970 24.4 13.9 0.00 0.0
1969 13.9 6.7 0.00 0.0
1968 24.4 16.1 0.00 0.0
1967 13.9 3.9 0.00 0.0
1966 12.8 2.8 0.00 0.0
1965 17.2 7.8 0.00 0.0
1964 13.9 8.3 0.00 0.0
1963 20.6 -0.6 0.00 0.0
1962 12.2 6.1 0.46 0.0
1961 22.8 13.9 0.66 0.0
1960 23.9 9.4 0.00 0.0
1959 18.9 4.4 0.00 0.0
1958 26.1 18.3 0.15 0.0
1957 19.4 5.6 0.00 0.0
1956 15.6 5.6 0.00 0.0
1955 15.6 7.2 0.00 0.0
1954 16.7 8.3 0.05 0.0
1953 21.1 7.2 0.13 0.0
1952 18.9 6.1 0.74 0.0
1951 18.3 12.2 0.05 0.0
1950 11.7 0.6 0.00 0.0
1949 13.3 1.1 0.05 0.0
1948 22.2 6.1 0.00 0.0
1947 10.0 1.1 0.00 0.0
1946 21.1 8.9 0.00 0.0
1945 n/a 13.9 0.97 0.0
1944 17.8 1.1 0.25 0.0
1943 11.1 0.6 0.00 0.0
1942 12.8 2.2 0.48 0.0
1941 25.6 6.1 0.00 0.0
1940 11.7 4.4 0.00 0.0
1939 21.1 5.0 0.00 0.0
1938 16.7 1.7 0.00 0.0
1937 28.3 8.9 0.05 0.0
1936 9.4 1.7 0.00 0.0
1935 27.8 8.9 0.00 0.0
1934 26.7 14.4 0.00 0.0
1933 22.2 7.2 0.00 0.0
1932 18.3 2.2 0.00 0.0
1931 15.6 3.3 0.00 0.0
1930 26.1 11.7 0.00 0.0
1929 25.0 12.2 0.00 0.0
1928 10.6 3.3 0.18 0.0
1927 25.6 5.6 0.00 0.0
1926 26.1 11.1 0.46 0.0
1925 11.1 1.7 0.00 0.0
1924 11.1 -0.6 0.00 0.0
1923 24.4 11.7 0.00 0.0
1922 15.0 2.2 0.00 0.0
1921 20.0 11.1 0.20 0.0
1920 29.4 14.4 0.00 0.0
1919 18.9 8.9 0.23 0.0
1918 16.1 2.8 0.00 0.0
1917 21.7 2.8 0.00 0.0
1916 15.0 5.0 0.00 0.0
1915 10.0 2.2 0.00 0.0
1914 15.0 9.4 0.00 0.0
1913 25.6 6.7 0.00 0.0
1912 16.7 11.7 0.64 0.0
1911 18.9 9.4 0.81 0.0
1910 22.2 8.3 0.20 0.0
1909 17.8 4.4 0.00 0.0
1908 26.7 12.2 0.00 0.0
1907 13.3 5.6 0.05 0.0
1906 20.0 0.0 0.00 0.0
1905 14.4 3.3 0.00 0.0
1904 19.4 11.1 0.00 0.0
1903 12.2 1.7 0.00 0.0
1902 12.8 2.8 0.00 0.0
1901 14.4 2.2 0.00 0.0
1900 21.1 7.8 0.00 0.0
1899 21.1 14.4 1.09 0.0
1898 20.6 8.9 0.05 0.0
1897 26.1 7.2 0.00 0.0
1896 21.7 7.2 0.00 0.0
1895 21.1 4.4 0.00 0.0
1894 10.0 4.4 0.00 0.0
1893 14.4 5.6 0.00 0.0
1892 26.1 17.2 2.03 0.0
1891 31.7 16.1 0.00 0.0
1890 17.2 -0.6 0.00 0.0
What's the all-time high for Ottawa on 9/25?
For the date of Sep 25, the highest temperature ever reached in Ottawa history is 33.0 °C which happened in 2017.
Highest Temperatures in Ottawa on September 25
Rank Temperature Year
1 33.0 °C 2017
2 31.7 °C 1891
3 29.4 °C 2007
3 29.4 °C 1920
5 28.3 °C 1937
6 27.8 °C 1935
7 26.7 °C 1934
7 26.7 °C 1908
9 26.1 °C 1930
9 26.1 °C 1897
9 26.1 °C 1958
9 26.1 °C 1926
9 26.1 °C 1892
What's the all-time low for Ottawa on 9/25?
For the date of Sep 25, the lowest temperature ever reached in Ottawa history is -0.6 °C which has happened 3 times, most recently in 1963.
Lowest Temperatures in Ottawa on September 25
Rank Temperature Year
1 -0.6 °C 1963
1 -0.6 °C 1924
1 -0.6 °C 1890
4 0.0 °C 1906
5 0.2 °C 2000
6 0.6 °C 1950
6 0.6 °C 1943
8 1.1 °C 1949
8 1.1 °C 1947
8 1.1 °C 1944
8 1.1 °C 1989
Lowest High Temperatures in Ottawa on September 25
Rank Temperature Year
1 9.4 °C 1936
2 10.0 °C 1947
2 10.0 °C 1894
2 10.0 °C 1915
5 10.6 °C 1928
6 11.0 °C 1977
7 11.1 °C 1925
7 11.1 °C 1974
7 11.1 °C 1924
7 11.1 °C 1943
What's the most it has ever rained in Ottawa on 9/25?
For the date of Sep 25, the most precipitation ever recorded in Ottawa history is 3.08 cm which happened in 2005.
All-Time Most Precipitation in Ottawa on September 25
Rank Precipitation Year
1 3.08 cm 2005
2 3.02 cm 1975
3 2.03 cm 1892
4 1.22 cm 1980
5 1.20 cm 2010
6 1.09 cm 1899
7 0.97 cm 1945
8 0.81 cm 1911
9 0.80 cm 2007
10 0.74 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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