Ottawa October 31 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of October 31 (Halloween).
October 31 All-Time Records
1889–2024
Highest temperature 21.5 °C 1989
Lowest temperature -10.6 °C 1925
Lowest daily high 0.0 °C 1913
Highest daily low 13.9 °C 1942
Most precipitation 4.60 cm 1919
Most snow 3.8 cm 1993
October 31 Average Weather
1991–2020 1
Average high 9.6 °C
Average low 1.5 °C
Chance precipitation 45.3%
Chance snow 5.5%
Ottawa October 31 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 5.0 -3.0 0.00 0.0
2022 14.0 2.0 0.08 0.0
2021 11.5 8.0 0.40 0.0
2020 7.0 -5.0 0.00 0.0
2019 10.0 7.0 3.46 0.0
2018 5.0 -1.0 0.96 0.0
2017 10.0 5.0 0.00 0.0
2016 4.5 0.5 0.00 0.0
2015 6.7 -4.5 0.31 0.0
2014 6.6 -1.0 0.00 0.0
2013 16.7 -0.5 1.64 0.0
2012 12.5 8.1 0.44 0.0
2011 11.5 -1.3 0.00 0.0
2010 2.0 0.0 0.00 0.0
2009 15.0 10.5 0.18 0.0
2008 15.5 -2.9 0.00 0.0
2007 16.9 1.3 0.28 0.0
2006 7.0 -0.5 0.05 0.0
2005 13.8 5.9 0.09 0.0
2004 14.5 6.3 0.32 0.0
2003 20.5 4.2 0.00 0.0
2002 4.4 -4.7 0.00 0.0
2001 3.3 -4.3 0.94 0.0
2000 10.5 -1.6 0.00 0.0
1999 19.4 6.9 0.02 0.0
1998 12.1 1.8 0.00 0.0
1997 15.7 1.0 0.06 0.0
1996 6.8 1.9 0.00 0.0
1995 2.2 -2.7 0.02 0.2
1994 12.1 1.6 0.38 0.0
1993 4.4 1.3 0.37 3.8
1992 4.7 -5.8 0.00 0.0
1991 10.5 0.8 0.00 0.0
1990 11.9 -3.3 0.00 0.0
1989 21.5 6.4 0.94 0.0
1988 5.5 -7.2 0.00 0.0
1987 8.3 3.6 0.00 0.0
1986 8.1 -5.3 0.00 0.0
1985 10.7 -1.6 0.00 0.0
1984 6.2 0.7 0.00 0.0
1983 12.5 -2.0 0.00 0.0
1982 17.0 7.5 0.10 0.0
1981 11.0 -0.5 0.00 0.0
1980 11.0 3.0 0.04 0.0
1979 11.5 -1.0 0.00 0.0
1978 15.5 4.0 0.00 0.0
1977 13.0 -0.5 0.00 0.0
1976 5.6 1.7 0.84 0.0
1975 5.0 -5.0 0.43 0.0
1974 19.4 10.0 0.23 0.0
1973 11.1 7.2 0.81 0.0
1972 3.3 -3.3 0.00 0.0
1971 18.3 1.1 0.00 0.0
1970 10.6 5.6 0.08 0.0
1969 7.2 -2.2 0.00 0.0
1968 5.0 -2.2 0.00 0.0
1967 7.8 0.6 0.05 0.0
1966 6.7 -6.7 0.23 0.0
1965 10.6 5.6 0.81 0.0
1964 8.9 -1.1 0.00 0.0
1963 9.4 1.7 0.71 0.0
1962 2.2 0.0 0.00 0.0
1961 10.6 3.9 0.15 0.0
1960 12.8 0.6 0.86 0.0
1959 3.9 1.1 0.69 0.0
1958 14.4 0.6 0.00 0.0
1957 14.4 6.7 0.00 0.0
1956 20.0 2.8 0.38 0.0
1955 13.3 7.2 0.00 0.0
1954 4.4 -2.8 0.00 0.0
1953 15.0 1.1 0.20 0.0
1952 13.9 2.2 0.00 0.0
1951 15.0 4.4 0.00 0.0
1950 13.9 2.2 0.00 0.0
1949 8.9 3.9 0.13 0.0
1948 14.4 0.6 0.00 0.0
1947 11.7 1.7 0.00 0.0
1946 13.3 10.0 0.00 0.0
1945 10.0 3.3 0.00 0.0
1944 12.8 -5.0 0.05 0.0
1943 15.0 2.2 0.00 0.0
1942 19.4 13.9 2.34 0.0
1941 2.8 -1.1 0.20 0.0
1940 10.6 -1.7 0.00 0.0
1939 5.6 1.7 0.74 0.0
1938 8.9 -4.4 0.00 0.0
1937 5.0 0.0 0.00 0.0
1936 4.4 -5.0 1.04 0.0
1935 14.4 7.2 0.00 0.0
1934 10.0 0.0 0.15 0.0
1933 10.0 1.1 0.00 0.0
1932 2.2 -3.9 0.00 0.0
1931 10.0 5.0 0.00 0.0
1930 8.9 -1.1 0.00 0.0
1929 6.7 0.6 0.00 0.0
1928 8.3 -2.8 0.00 0.0
1927 15.6 0.6 0.00 0.0
1926 6.1 1.7 0.30 0.0
1925 3.9 -10.6 0.00 0.0
1924 13.9 -2.2 0.00 0.0
1923 1.1 -5.6 0.10 0.0
1922 10.6 -1.1 0.00 0.0
1921 11.7 2.2 0.53 0.0
1920 11.1 3.3 0.00 0.0
1919 6.1 1.7 4.60 0.0
1918 12.2 8.9 1.12 0.0
1917 5.0 -1.1 0.00 0.0
1916 11.7 2.2 0.00 0.0
1915 11.1 -0.6 0.00 0.0
1914 11.1 -1.7 0.00 0.0
1913 0.0 -5.6 0.00 0.0
1912 7.8 0.0 0.00 0.0
1911 1.7 -0.6 0.33 0.0
1910 10.6 1.1 0.00 0.0
1909 6.7 0.0 0.46 0.0
1908 3.9 -0.6 0.00 0.0
1907 8.3 -7.8 0.00 0.0
1906 3.3 -3.3 0.00 0.0
1905 1.7 -3.3 0.13 1.3
1904 4.4 -7.2 0.00 0.0
1903 14.4 1.1 0.05 0.0
1902 7.8 -0.6 0.00 0.0
1901 19.4 5.6 0.00 0.0
1900 6.7 2.2 0.05 0.0
1899 11.1 1.1 0.00 0.0
1898 5.0 0.6 0.00 0.0
1897 6.7 -3.3 0.00 0.0
1896 12.2 6.7 0.18 0.0
1895 6.1 -5.6 0.00 0.0
1894 12.2 7.8 1.45 0.0
1893 6.1 -5.6 0.00 0.0
1892 8.3 -2.2 0.03 0.0
1891 14.4 5.0 0.00 0.0
1890 7.2 -0.6 0.00 0.0
What's the all-time high for Ottawa on 10/31?
For the date of Oct 31, the highest temperature ever reached in Ottawa history is 21.5 °C which happened in 1989.
Highest Temperatures in Ottawa on October 31
Rank Temperature Year
1 21.5 °C 1989
2 20.5 °C 2003
3 20.0 °C 1956
4 19.4 °C 1942
4 19.4 °C 1999
4 19.4 °C 1974
4 19.4 °C 1901
8 18.3 °C 1971
9 17.0 °C 1982
10 16.9 °C 2007
What's the all-time low for Ottawa on 10/31?
For the date of Oct 31, the lowest temperature ever reached in Ottawa history is -10.6 °C which happened in 1925.
Lowest Temperatures in Ottawa on October 31
Rank Temperature Year
1 -10.6 °C 1925
2 -7.8 °C 1907
3 -7.2 °C 1904
3 -7.2 °C 1988
5 -6.7 °C 1966
6 -5.8 °C 1992
7 -5.6 °C 1923
7 -5.6 °C 1913
7 -5.6 °C 1895
7 -5.6 °C 1893
Lowest High Temperatures in Ottawa on October 31
Rank Temperature Year
1 0.0 °C 1913
2 1.1 °C 1923
3 1.7 °C 1905
3 1.7 °C 1911
5 2.0 °C 2010
6 2.2 °C 1995
6 2.2 °C 1962
6 2.2 °C 1932
9 2.8 °C 1941
10 3.3 °C 2001
10 3.3 °C 1906
10 3.3 °C 1972
What's the most it has ever rained in Ottawa on 10/31?
For the date of Oct 31, the most precipitation ever recorded in Ottawa history is 4.60 cm which happened in 1919.
All-Time Most Precipitation in Ottawa on October 31
Rank Precipitation Year
1 4.60 cm 1919
2 3.46 cm 2019
3 2.34 cm 1942
4 1.64 cm 2013
5 1.45 cm 1894
6 1.12 cm 1918
7 1.04 cm 1936
8 0.96 cm 2018
9 0.94 cm 2001
9 0.94 cm 1989
All-Time Most Snow in Ottawa on October 31
Rank Precipitation Year
1 3.8 cm 1993
2 1.3 cm 1905
3 0.2 cm 1995
Weather Station Details
Years Station Coordinates
1889–2024 Ottawa CDA location