Ottawa September 23 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of September 23.
September 23 All-Time Records
1889–2024
Highest temperature 30.0 °C 1895
Lowest temperature -1.1 °C 1955
Lowest daily high 8.9 °C 1974
Highest daily low 20.6 °C 1965
Most precipitation 2.59 cm 1898
Most snow none -
September 23 Average Weather
1991–2020 1
Average high 19.4 °C
Average low 9.0 °C
Chance precipitation 42.2%
Chance snow 0%
Ottawa September 23 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 23.0 7.0 0.00 0.0
2022 13.5 4.5 0.00 0.0
2021 23.0 14.0 1.40 0.0
2020 24.0 12.0 0.00 0.0
2019 26.0 18.5 0.12 0.0
2018 16.5 4.0 0.00 0.0
2017 28.5 14.0 0.00 0.0
2016 17.5 11.0 0.00 0.0
2015 23.4 8.8 0.00 0.0
2014 17.2 6.2 0.00 0.0
2013 12.8 4.5 0.00 0.0
2012 15.2 7.7 0.00 0.0
2011 23.9 9.8 0.00 0.0
2010 14.3 7.8 0.99 0.0
2009 22.5 18.5 0.77 0.0
2008 20.5 3.1 0.00 0.0
2007 21.9 11.0 0.00 0.0
2006 20.5 11.6 0.99 0.0
2005 17.7 12.1 0.00 0.0
2004 25.0 15.1 0.00 0.0
2003 21.3 16.7 0.31 0.0
2002 19.6 9.4 0.00 0.0
2001 22.9 13.0 0.00 0.0
2000 12.6 9.7 1.03 0.0
1999 21.0 3.8 0.07 0.0
1998 14.8 3.8 0.00 0.0
1997 14.1 10.9 0.06 0.0
1996 15.5 5.9 0.00 0.0
1995 13.8 4.1 0.00 0.0
1994 18.8 12.9 0.00 0.0
1993 20.3 9.4 0.64 0.0
1992 10.1 3.5 0.00 0.0
1991 19.2 11.0 0.28 0.0
1990 13.4 6.5 0.10 0.0
1989 10.8 6.8 0.00 0.0
1988 21.5 12.5 0.04 0.0
1987 19.4 9.9 0.24 0.0
1986 16.0 11.5 0.24 0.0
1985 26.4 12.5 0.00 0.0
1984 25.2 10.4 0.03 0.0
1983 14.5 4.0 0.00 0.0
1982 16.0 10.5 0.02 0.0
1981 15.0 6.0 1.82 0.0
1980 15.5 13.0 0.00 0.0
1979 15.0 3.5 0.00 0.0
1978 17.5 2.0 0.00 0.0
1977 15.5 9.5 0.00 0.0
1976 15.0 3.3 0.38 0.0
1975 17.2 7.8 0.25 0.0
1974 8.9 1.7 0.00 0.0
1973 15.0 6.7 0.08 0.0
1972 15.6 1.1 0.00 0.0
1971 16.7 8.3 0.64 0.0
1970 18.9 15.6 0.00 0.0
1969 25.0 6.1 0.03 0.0
1968 23.3 9.4 0.00 0.0
1967 14.4 5.6 0.28 0.0
1966 14.4 9.4 0.00 0.0
1965 25.0 20.6 0.10 0.0
1964 26.1 14.4 0.00 0.0
1963 12.8 2.2 0.00 0.0
1962 15.0 2.8 0.00 0.0
1961 28.9 15.6 0.00 0.0
1960 20.0 14.4 0.05 0.0
1959 27.8 12.8 0.03 0.0
1958 24.4 5.0 0.00 0.0
1957 19.4 10.0 0.08 0.0
1956 12.2 2.8 0.05 0.0
1955 17.2 -1.1 0.56 0.0
1954 12.2 8.3 0.00 0.0
1953 12.2 1.7 0.00 0.0
1952 17.2 5.6 0.05 0.0
1951 17.8 10.6 0.00 0.0
1950 9.4 6.1 0.05 0.0
1949 13.9 8.9 0.23 0.0
1948 15.0 7.8 0.00 0.0
1947 8.9 -1.1 0.00 0.0
1946 25.6 14.4 1.88 0.0
1945 18.9 2.2 1.14 0.0
1944 12.8 1.7 0.00 0.0
1943 16.7 6.7 0.00 0.0
1942 12.8 1.1 0.48 0.0
1941 19.4 11.7 0.00 0.0
1940 22.2 4.4 0.43 0.0
1939 13.3 11.1 0.38 0.0
1938 18.9 10.0 0.23 0.0
1937 25.6 5.0 0.00 0.0
1936 28.9 12.8 0.71 0.0
1935 13.9 2.2 0.00 0.0
1934 20.6 15.6 0.00 0.0
1933 18.3 3.9 0.08 0.0
1932 20.6 12.8 0.00 0.0
1931 25.6 12.2 0.00 0.0
1930 21.7 4.4 0.00 0.0
1929 22.8 -0.6 0.00 0.0
1928 10.6 6.7 0.66 0.0
1927 15.6 6.7 0.10 0.0
1926 16.7 10.0 0.00 0.0
1925 15.0 -0.6 0.00 0.0
1924 13.3 4.4 0.00 0.0
1923 22.2 11.1 0.00 0.0
1922 27.2 10.6 0.00 0.0
1921 23.9 11.1 0.00 0.0
1920 26.7 13.9 0.00 0.0
1919 13.9 6.1 0.00 0.0
1918 14.4 5.6 0.10 0.0
1917 18.3 0.0 0.00 0.0
1916 18.9 11.1 0.05 0.0
1915 18.9 2.8 0.00 0.0
1914 25.6 15.0 0.41 0.0
1913 15.6 4.4 0.00 0.0
1912 15.6 13.3 0.97 0.0
1911 23.9 7.2 0.00 0.0
1910 15.0 2.8 0.00 0.0
1909 27.2 17.2 0.05 0.0
1908 23.3 9.4 0.00 0.0
1907 15.0 2.2 0.00 0.0
1906 18.9 12.2 0.76 0.0
1905 16.1 6.1 0.00 0.0
1904 12.8 0.0 0.15 0.0
1903 26.7 8.9 0.00 0.0
1902 22.8 14.4 1.85 0.0
1901 24.4 9.4 0.00 0.0
1900 18.9 11.1 0.00 0.0
1899 11.1 0.0 0.00 0.0
1898 18.3 12.8 2.59 0.0
1897 19.4 4.4 0.00 0.0
1896 11.7 -1.1 0.00 0.0
1895 30.0 13.3 0.00 0.0
1894 22.8 14.4 0.30 0.0
1893 14.4 6.1 0.08 0.0
1892 22.8 15.0 0.81 0.0
1891 27.2 14.4 0.00 0.0
1890 16.1 6.7 0.13 0.0
What's the all-time high for Ottawa on 9/23?
For the date of Sep 23, the highest temperature ever reached in Ottawa history is 30.0 °C which happened in 1895.
Highest Temperatures in Ottawa on September 23
Rank Temperature Year
1 30.0 °C 1895
2 28.9 °C 1936
2 28.9 °C 1961
4 28.5 °C 2017
5 27.8 °C 1959
6 27.2 °C 1891
6 27.2 °C 1909
6 27.2 °C 1922
9 26.7 °C 1903
9 26.7 °C 1920
What's the all-time low for Ottawa on 9/23?
For the date of Sep 23, the lowest temperature ever reached in Ottawa history is -1.1 °C which has happened 3 times, most recently in 1955.
Lowest Temperatures in Ottawa on September 23
Rank Temperature Year
1 -1.1 °C 1955
1 -1.1 °C 1896
1 -1.1 °C 1947
4 -0.6 °C 1929
4 -0.6 °C 1925
6 0.0 °C 1904
6 0.0 °C 1899
6 0.0 °C 1917
9 1.1 °C 1972
9 1.1 °C 1942
Lowest High Temperatures in Ottawa on September 23
Rank Temperature Year
1 8.9 °C 1974
1 8.9 °C 1947
3 9.4 °C 1950
4 10.1 °C 1992
5 10.6 °C 1928
6 10.8 °C 1989
7 11.1 °C 1899
8 11.7 °C 1896
9 12.2 °C 1954
9 12.2 °C 1956
9 12.2 °C 1953
What's the most it has ever rained in Ottawa on 9/23?
For the date of Sep 23, the most precipitation ever recorded in Ottawa history is 2.59 cm which happened in 1898.
All-Time Most Precipitation in Ottawa on September 23
Rank Precipitation Year
1 2.59 cm 1898
2 1.88 cm 1946
3 1.85 cm 1902
4 1.82 cm 1981
5 1.40 cm 2021
6 1.14 cm 1945
7 1.03 cm 2000
8 0.99 cm 2010
8 0.99 cm 2006
10 0.97 cm 1912
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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