Ottawa September 27 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of September 27.
September 27 All-Time Records
1889–2024
Highest temperature 30.5 °C 2017
Lowest temperature -1.7 °C 1984
Lowest daily high 6.1 °C 1939
Highest daily low 19.0 °C 2017
Most precipitation 3.35 cm 2010
Most snow none -
September 27 Average Weather
1991–2020 1
Average high 18.5 °C
Average low 8.3 °C
Chance precipitation 43.0%
Chance snow 0.1%
Ottawa September 27 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 21.0 4.5 0.00 0.0
2022 17.0 11.0 0.00 0.0
2021 16.5 9.5 0.14 0.0
2020 26.0 16.0 0.00 0.0
2019 21.0 6.0 0.76 0.0
2018 17.5 5.0 0.00 0.0
2017 30.5 19.0 0.96 0.0
2016 21.5 10.5 0.00 0.0
2015 23.8 5.1 0.00 0.0
2014 26.1 12.0 0.00 0.0
2013 20.5 5.5 0.00 0.0
2012 15.0 4.5 0.00 0.0
2011 26.4 12.4 0.00 0.0
2010 15.8 10.1 3.35 0.0
2009 15.5 11.3 0.05 0.0
2008 18.1 13.0 0.50 0.0
2007 17.9 14.0 0.16 0.0
2006 21.9 5.4 0.00 0.0
2005 20.2 8.0 0.00 0.0
2004 24.8 10.3 0.00 0.0
2003 24.5 11.5 2.48 0.0
2002 14.5 8.2 2.02 0.0
2001 15.3 5.4 0.32 0.0
2000 16.8 4.9 0.07 0.0
1999 23.2 8.2 0.00 0.0
1998 27.4 17.6 0.22 0.0
1997 18.2 0.5 0.00 0.0
1996 18.5 8.9 0.80 0.0
1995 18.9 8.5 0.00 0.0
1994 23.0 17.1 0.82 0.0
1993 13.3 12.2 1.49 0.0
1992 19.6 11.7 0.34 0.0
1991 11.7 5.1 0.40 0.0
1990 20.2 10.5 0.00 0.0
1989 10.3 0.1 0.00 0.0
1988 18.6 8.6 0.40 0.0
1987 17.2 -0.3 0.14 0.0
1986 13.8 4.2 0.00 0.0
1985 15.2 13.6 1.50 0.0
1984 13.1 -1.7 0.00 0.0
1983 21.5 13.5 0.00 0.0
1982 14.5 12.5 0.58 0.0
1981 23.0 14.0 0.10 0.0
1980 10.5 1.0 0.08 0.0
1979 23.0 3.5 0.00 0.0
1978 20.5 10.0 0.32 0.0
1977 17.5 13.0 0.10 0.0
1976 16.1 7.8 0.08 0.0
1975 17.2 12.2 0.46 0.0
1974 25.0 4.4 0.51 0.0
1973 23.3 15.6 0.08 0.0
1972 13.9 10.6 0.00 0.0
1971 16.1 6.1 0.00 0.0
1970 15.0 11.1 0.00 0.0
1969 16.1 8.9 1.19 0.0
1968 17.8 11.1 0.20 0.0
1967 19.4 10.0 2.18 0.0
1966 15.6 -1.7 0.00 0.0
1965 9.4 0.0 0.00 0.0
1964 21.7 13.3 0.46 0.0
1963 11.1 8.3 1.02 0.0
1962 16.1 8.3 0.00 0.0
1961 20.6 6.7 0.08 0.0
1960 21.1 11.1 0.00 0.0
1959 25.6 13.3 0.00 0.0
1958 16.7 10.6 0.00 0.0
1957 10.0 1.7 0.00 0.0
1956 16.7 -1.1 0.00 0.0
1955 18.9 2.8 0.89 0.0
1954 16.7 6.1 0.05 0.0
1953 20.0 4.4 0.41 0.0
1952 15.6 1.1 0.00 0.0
1951 23.3 8.3 0.00 0.0
1950 16.7 5.6 0.00 0.0
1949 18.3 6.7 0.38 0.0
1948 24.4 5.0 0.00 0.0
1947 9.4 1.7 0.00 0.0
1946 23.3 6.1 0.00 0.0
1945 n/a n/a 0.00 0.0
1944 6.7 2.2 1.75 0.0
1943 22.2 7.2 0.00 0.0
1942 16.7 n/a 0.38 0.0
1941 19.4 -0.6 0.00 0.0
1940 18.9 1.1 0.00 0.0
1939 6.1 -1.1 0.86 0.0
1938 17.8 10.0 0.00 0.0
1937 14.4 2.8 0.00 0.0
1936 16.1 9.4 2.54 0.0
1935 10.0 5.0 0.00 0.0
1934 20.6 13.9 0.51 0.0
1933 20.6 15.6 0.97 0.0
1932 17.2 7.8 0.61 0.0
1931 13.9 8.3 0.10 0.0
1930 16.7 12.2 0.18 0.0
1929 18.9 7.8 0.00 0.0
1928 8.9 2.2 0.10 0.0
1927 8.3 6.1 0.23 0.0
1926 13.9 -1.1 0.00 0.0
1925 17.8 6.7 1.73 0.0
1924 22.2 3.3 0.00 0.0
1923 22.2 13.9 0.86 0.0
1922 22.2 8.9 0.00 0.0
1921 22.8 4.4 0.00 0.0
1920 27.2 16.1 0.38 0.0
1919 17.8 1.7 0.00 0.0
1918 12.8 2.2 1.22 0.0
1917 24.4 6.1 0.00 0.0
1916 28.3 10.0 0.13 0.0
1915 12.2 3.3 0.00 0.0
1914 12.8 4.4 0.99 0.0
1913 12.2 6.1 0.00 0.0
1912 15.6 5.0 0.20 0.0
1911 12.8 2.8 0.15 0.0
1910 15.0 7.8 0.64 0.0
1909 13.9 8.3 0.38 0.0
1908 26.7 12.2 0.00 0.0
1907 15.6 3.9 0.30 0.0
1906 21.1 10.0 0.00 0.0
1905 17.2 3.9 0.00 0.0
1904 15.6 3.9 0.00 0.0
1903 22.8 13.3 0.00 0.0
1902 20.6 11.7 0.15 0.0
1901 23.9 5.6 0.00 0.0
1900 25.0 15.6 0.30 0.0
1899 8.9 3.9 0.51 0.0
1898 18.3 6.1 0.15 0.0
1897 12.8 3.9 0.00 0.0
1896 16.7 12.2 1.45 0.0
1895 17.2 6.7 0.00 0.0
1894 20.0 3.9 0.00 0.0
1893 17.2 3.9 0.33 0.0
1892 17.8 6.7 0.00 0.0
1891 26.7 7.2 0.00 0.0
1890 11.1 3.9 0.00 0.0
What's the all-time high for Ottawa on 9/27?
For the date of Sep 27, the highest temperature ever reached in Ottawa history is 30.5 °C which happened in 2017.
Highest Temperatures in Ottawa on September 27
Rank Temperature Year
1 30.5 °C 2017
2 28.3 °C 1916
3 27.4 °C 1998
4 27.2 °C 1920
5 26.7 °C 1891
5 26.7 °C 1908
7 26.4 °C 2011
8 26.1 °C 2014
9 26.0 °C 2020
10 25.6 °C 1959
What's the all-time low for Ottawa on 9/27?
For the date of Sep 27, the lowest temperature ever reached in Ottawa history is -1.7 °C which has happened 2 times, most recently in 1984.
Lowest Temperatures in Ottawa on September 27
Rank Temperature Year
1 -1.7 °C 1984
1 -1.7 °C 1966
3 -1.1 °C 1926
3 -1.1 °C 1956
3 -1.1 °C 1939
6 -0.6 °C 1941
7 -0.3 °C 1987
8 0.0 °C 1965
9 0.1 °C 1989
10 0.5 °C 1997
Lowest High Temperatures in Ottawa on September 27
Rank Temperature Year
1 6.1 °C 1939
2 6.7 °C 1944
3 8.3 °C 1927
4 8.9 °C 1928
4 8.9 °C 1899
6 9.4 °C 1947
6 9.4 °C 1965
8 10.0 °C 1935
8 10.0 °C 1957
10 10.3 °C 1989
What's the most it has ever rained in Ottawa on 9/27?
For the date of Sep 27, the most precipitation ever recorded in Ottawa history is 3.35 cm which happened in 2010.
All-Time Most Precipitation in Ottawa on September 27
Rank Precipitation Year
1 3.35 cm 2010
2 2.54 cm 1936
3 2.48 cm 2003
4 2.18 cm 1967
5 2.02 cm 2002
6 1.75 cm 1944
7 1.73 cm 1925
8 1.50 cm 1985
9 1.49 cm 1993
10 1.45 cm 1896
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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