Ottawa September 1 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of September 1.
September 1 All-Time Records
1889–2024
Highest temperature 35.6 °C 1908
Lowest temperature 3.9 °C 1894
Lowest daily high 13.3 °C 1912
Highest daily low 21.7 °C 1962
Most precipitation 5.95 cm 1989
Most snow none -
September 1 Average Weather
1991–2020 1
Average high 23.8 °C
Average low 12.9 °C
Chance precipitation 38.3%
Chance snow 0%
Ottawa September 1 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 24.5 8.0 0.00 0.0
2022 18.5 10.0 0.00 0.0
2021 24.0 13.5 0.00 0.0
2020 25.0 13.0 0.00 0.0
2019 24.0 7.5 0.64 0.0
2018 27.0 15.0 0.00 0.0
2017 17.0 7.0 0.00 0.0
2016 23.0 12.5 0.00 0.0
2015 28.7 12.8 0.00 0.0
2014 27.5 17.5 0.00 0.0
2013 26.5 16.5 0.00 0.0
2012 25.1 15.5 0.00 0.0
2011 26.2 14.6 0.02 0.0
2010 32.2 20.2 0.00 0.0
2009 22.8 6.0 0.00 0.0
2008 28.2 10.7 0.00 0.0
2007 20.8 11.4 0.00 0.0
2006 23.7 9.7 0.00 0.0
2005 27.1 16.7 0.00 0.0
2004 20.5 14.0 0.00 0.0
2003 24.4 11.6 0.00 0.0
2002 27.1 13.1 0.00 0.0
2001 18.1 10.5 0.00 0.0
2000 29.5 18.4 0.92 0.0
1999 30.7 8.3 0.00 0.0
1998 24.4 10.6 0.00 0.0
1997 24.8 12.4 0.00 0.0
1996 28.5 12.3 0.00 0.0
1995 21.7 16.2 0.00 0.0
1994 18.4 10.5 0.00 0.0
1993 23.0 11.3 0.00 0.0
1992 18.0 8.7 0.00 0.0
1991 18.2 7.1 0.00 0.0
1990 27.2 13.3 0.00 0.0
1989 21.8 15.8 5.95 0.0
1988 25.1 9.6 0.00 0.0
1987 16.5 9.4 0.02 0.0
1986 23.7 8.5 0.00 0.0
1985 20.5 7.5 0.27 0.0
1984 21.6 12.3 0.00 0.0
1983 26.5 11.5 0.00 0.0
1982 20.5 8.0 2.62 0.0
1981 25.0 18.0 0.12 0.0
1980 27.5 19.0 0.64 0.0
1979 28.5 13.5 0.00 0.0
1978 23.0 7.5 0.00 0.0
1977 31.5 18.5 1.16 0.0
1976 15.6 13.3 0.58 0.0
1975 18.3 11.7 0.48 0.0
1974 19.4 7.8 0.05 0.0
1973 31.1 20.0 0.00 0.0
1972 28.9 13.9 0.00 0.0
1971 22.8 6.7 0.00 0.0
1970 17.2 9.4 0.00 0.0
1969 26.1 18.3 0.08 0.0
1968 26.1 8.3 0.00 0.0
1967 18.9 5.0 0.00 0.0
1966 28.9 9.4 0.00 0.0
1965 16.1 9.4 1.60 0.0
1964 20.6 10.0 0.00 0.0
1963 21.7 6.7 0.00 0.0
1962 28.3 21.7 1.32 0.0
1961 30.6 17.8 0.99 0.0
1960 27.8 17.8 0.00 0.0
1959 28.3 20.0 0.00 0.0
1958 15.6 12.8 0.00 0.0
1957 27.2 8.9 0.00 0.0
1956 22.2 16.7 0.23 0.0
1955 22.2 9.4 0.00 0.0
1954 22.8 12.2 0.00 0.0
1953 33.9 12.8 0.00 0.0
1952 25.6 19.4 0.10 0.0
1951 19.4 7.2 0.25 0.0
1950 23.9 15.6 0.00 0.0
1949 19.4 15.0 0.05 0.0
1948 21.1 7.8 0.00 0.0
1947 23.3 12.8 0.51 0.0
1946 25.6 10.0 0.91 0.0
1945 26.1 13.3 0.43 0.0
1944 27.8 17.8 0.00 0.0
1943 21.1 13.9 1.52 0.0
1942 29.4 12.2 0.00 0.0
1941 21.1 16.1 0.00 0.0
1940 25.0 18.3 0.00 0.0
1939 25.6 13.9 0.00 0.0
1938 17.2 11.7 0.00 0.0
1937 32.2 18.3 0.00 0.0
1936 16.7 6.7 0.00 0.0
1935 20.6 6.7 0.05 0.0
1934 25.6 6.7 0.30 0.0
1933 27.2 12.8 0.00 0.0
1932 29.4 17.2 0.81 0.0
1931 17.2 4.4 0.46 0.0
1930 25.6 16.1 0.38 0.0
1929 23.9 16.7 0.00 0.0
1928 18.9 5.6 0.00 0.0
1927 25.0 15.0 0.00 0.0
1926 20.0 4.4 0.00 0.0
1925 27.8 13.9 0.00 0.0
1924 30.6 16.1 0.00 0.0
1923 24.4 15.6 0.00 0.0
1922 27.2 8.9 0.00 0.0
1921 29.4 9.4 0.00 0.0
1920 19.4 11.7 0.38 0.0
1919 22.8 10.0 0.00 0.0
1918 20.6 12.2 0.00 0.0
1917 20.0 10.6 0.00 0.0
1916 21.7 16.7 0.41 0.0
1915 23.9 7.2 0.00 0.0
1914 26.7 13.9 0.00 0.0
1913 28.3 11.1 0.00 0.0
1912 13.3 8.3 1.12 0.0
1911 27.2 12.2 0.00 0.0
1910 20.6 9.4 0.00 0.0
1909 16.7 10.6 0.99 0.0
1908 35.6 13.9 0.00 0.0
1907 23.3 6.7 0.00 0.0
1906 18.9 5.6 0.00 0.0
1905 21.7 13.3 0.10 0.0
1904 20.0 8.9 0.00 0.0
1903 22.2 12.8 0.00 0.0
1902 26.1 18.3 0.28 0.0
1901 20.6 15.0 0.15 0.0
1900 28.3 13.9 0.00 0.0
1899 26.7 12.2 0.61 0.0
1898 30.6 17.2 0.05 0.0
1897 23.9 7.8 0.00 0.0
1896 16.1 6.7 0.05 0.0
1895 17.8 7.8 0.00 0.0
1894 24.4 3.9 0.00 0.0
1893 22.2 7.2 1.02 0.0
1892 16.1 9.4 0.00 0.0
1891 22.2 13.3 0.00 0.0
1890 22.2 8.9 0.00 0.0
What's the all-time high for Ottawa on 9/1?
For the date of Sep 1, the highest temperature ever reached in Ottawa history is 35.6 °C which happened in 1908.
Highest Temperatures in Ottawa on September 1
Rank Temperature Year
1 35.6 °C 1908
2 33.9 °C 1953
3 32.2 °C 1937
3 32.2 °C 2010
5 31.5 °C 1977
6 31.1 °C 1973
7 30.7 °C 1999
8 30.6 °C 1961
8 30.6 °C 1898
8 30.6 °C 1924
What's the all-time low for Ottawa on 9/1?
For the date of Sep 1, the lowest temperature ever reached in Ottawa history is 3.9 °C which happened in 1894.
Lowest Temperatures in Ottawa on September 1
Rank Temperature Year
1 3.9 °C 1894
2 4.4 °C 1926
2 4.4 °C 1931
4 5.0 °C 1967
5 5.6 °C 1928
5 5.6 °C 1906
7 6.0 °C 2009
8 6.7 °C 1971
8 6.7 °C 1936
8 6.7 °C 1935
8 6.7 °C 1896
8 6.7 °C 1963
8 6.7 °C 1907
8 6.7 °C 1934
Lowest High Temperatures in Ottawa on September 1
Rank Temperature Year
1 13.3 °C 1912
2 15.6 °C 1976
2 15.6 °C 1958
4 16.1 °C 1892
4 16.1 °C 1896
4 16.1 °C 1965
7 16.5 °C 1987
8 16.7 °C 1909
8 16.7 °C 1936
10 17.0 °C 2017
What's the most it has ever rained in Ottawa on 9/1?
For the date of Sep 1, the most precipitation ever recorded in Ottawa history is 5.95 cm which happened in 1989.
All-Time Most Precipitation in Ottawa on September 1
Rank Precipitation Year
1 5.95 cm 1989
2 2.62 cm 1982
3 1.60 cm 1965
4 1.52 cm 1943
5 1.32 cm 1962
6 1.16 cm 1977
7 1.12 cm 1912
8 1.02 cm 1893
9 0.99 cm 1961
9 0.99 cm 1909
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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