Ottawa October 21 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of October 21.
October 21 All-Time Records
1889–2024
Highest temperature 25.0 °C 1914
Lowest temperature -7.8 °C 1922
Lowest daily high 2.8 °C 1969
Highest daily low 15.0 °C 1979
Most precipitation 5.39 cm 1995
Most snow 9.4 cm 1997
October 21 Average Weather
1991–2020 1
Average high 12.2 °C
Average low 3.5 °C
Chance precipitation 47.2%
Chance snow 2.3%
Ottawa October 21 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 14.0 10.0 0.66 0.0
2022 15.0 -0.5 0.00 0.0
2021 16.0 10.0 1.56 0.0
2020 15.5 3.5 1.18 0.0
2019 16.0 0.0 0.00 0.0
2018 4.0 -0.5 0.00 0.0
2017 22.0 5.5 0.00 0.0
2016 10.0 9.0 2.04 0.0
2015 11.2 2.7 0.42 0.0
2014 7.8 4.0 0.16 0.0
2013 14.1 0.5 0.36 0.0
2012 12.8 7.3 0.00 0.0
2011 12.2 7.4 0.32 0.0
2010 7.8 4.5 0.00 0.0
2009 9.2 7.1 0.66 0.0
2008 8.3 5.0 0.22 0.0
2007 22.6 8.0 0.00 0.0
2006 7.4 2.0 0.00 0.0
2005 9.8 -1.6 0.00 0.0
2004 8.7 3.0 0.00 0.0
2003 n/a 2.5 0.12 0.0
2002 8.0 1.3 0.00 0.0
2001 12.1 5.7 0.20 0.0
2000 16.9 12.5 0.00 0.0
1999 13.3 0.7 0.02 0.0
1998 8.4 1.2 0.00 0.0
1997 6.1 -0.7 0.86 9.4
1996 7.6 6.2 1.24 0.0
1995 16.4 10.6 5.39 0.0
1994 17.5 10.7 0.00 0.0
1993 17.1 8.0 0.00 0.0
1992 6.0 0.5 0.00 0.0
1991 10.0 0.8 0.10 0.0
1990 17.3 -1.2 0.00 0.0
1989 5.8 2.9 0.18 0.0
1988 11.7 -2.2 0.40 2.0
1987 7.7 2.7 0.02 0.0
1986 13.4 5.1 0.00 0.0
1985 12.3 -0.4 0.00 0.0
1984 12.7 8.4 0.30 0.0
1983 8.0 -3.0 0.00 0.0
1982 8.0 4.5 0.00 0.0
1981 6.5 3.5 0.50 4.0
1980 8.0 -1.0 0.12 0.0
1979 24.5 15.0 0.00 0.0
1978 19.0 4.0 0.00 0.0
1977 18.5 1.0 0.72 0.0
1976 7.2 1.7 0.08 0.0
1975 16.7 8.3 0.00 0.0
1974 6.1 -3.9 0.00 0.0
1973 11.1 -1.1 0.00 0.0
1972 8.3 -1.1 0.28 0.0
1971 13.9 5.6 0.00 0.0
1970 12.8 5.6 1.19 0.0
1969 2.8 0.6 0.23 1.3
1968 13.3 6.7 0.00 0.0
1967 10.6 2.8 0.36 0.0
1966 16.7 0.0 0.00 0.0
1965 13.3 9.4 1.09 0.0
1964 10.0 -2.2 0.00 0.0
1963 13.9 6.1 0.00 0.0
1962 11.7 5.6 0.00 0.0
1961 15.0 7.8 0.00 0.0
1960 5.0 -2.8 0.00 0.0
1959 5.0 -5.6 0.00 0.0
1958 15.6 -1.1 0.00 0.0
1957 11.7 -5.0 0.00 0.0
1956 16.1 9.4 0.00 0.0
1955 7.2 3.3 0.25 0.0
1954 13.3 -1.1 0.00 0.0
1953 17.8 5.6 0.00 0.0
1952 11.1 -3.9 0.00 0.0
1951 15.0 -2.2 0.00 0.0
1950 8.9 -0.6 0.23 0.0
1949 16.1 7.2 0.18 0.0
1948 6.7 -5.0 0.00 0.0
1947 17.2 8.9 0.00 0.0
1946 13.3 -5.6 0.00 0.0
1945 16.1 6.1 0.13 0.0
1944 8.9 2.2 0.00 0.0
1943 11.7 2.8 0.00 0.0
1942 17.2 1.7 0.43 0.0
1941 13.3 2.2 0.46 0.0
1940 2.8 -4.4 0.00 0.0
1939 16.1 0.6 0.20 0.0
1938 10.0 4.4 0.00 0.0
1937 11.7 6.1 0.00 0.0
1936 21.7 6.1 0.91 0.0
1935 16.7 -1.7 0.15 0.0
1934 6.1 0.0 1.19 0.0
1933 7.2 -2.2 0.15 0.0
1932 8.3 5.0 0.28 0.0
1931 15.0 3.9 0.00 0.0
1930 7.8 -2.8 0.00 0.0
1929 18.3 6.1 0.00 0.0
1928 12.8 1.1 0.00 0.0
1927 13.9 4.4 0.00 0.0
1926 7.2 -1.7 0.00 0.0
1925 5.0 -3.3 0.10 1.0
1924 7.8 0.6 0.00 0.0
1923 10.0 1.1 0.00 0.0
1922 8.9 -7.8 0.00 0.0
1921 7.2 2.8 0.38 0.0
1920 22.2 13.3 0.03 0.0
1919 11.1 -2.8 0.41 0.0
1918 10.6 3.9 0.28 0.0
1917 7.8 -3.9 0.00 0.0
1916 13.9 6.7 0.69 0.0
1915 17.8 11.7 0.10 0.0
1914 25.0 9.4 0.00 0.0
1913 9.4 0.6 1.19 0.0
1912 16.7 0.0 0.00 0.0
1911 15.6 9.4 0.00 0.0
1910 10.6 -1.1 0.00 0.0
1909 3.3 -3.9 0.51 0.0
1908 11.1 -2.2 0.00 0.0
1907 3.9 -7.8 0.00 0.0
1906 11.1 0.6 0.00 0.0
1905 8.9 -0.6 0.08 0.0
1904 18.3 8.9 1.83 0.0
1903 9.4 -0.6 0.00 0.0
1902 7.2 0.0 0.00 0.0
1901 8.9 2.2 0.03 0.0
1900 17.8 -0.6 0.00 0.0
1899 6.1 -2.2 0.00 0.0
1898 8.9 4.4 0.18 0.0
1897 10.6 4.4 0.00 0.0
1896 7.8 0.0 0.91 0.0
1895 3.9 -7.8 0.00 0.0
1894 16.1 5.0 0.00 0.0
1893 16.7 7.2 0.00 0.0
1892 13.9 5.0 0.00 0.0
1891 7.8 3.3 2.46 0.0
1890 12.2 1.1 0.00 0.0
What's the all-time high for Ottawa on 10/21?
For the date of Oct 21, the highest temperature ever reached in Ottawa history is 25.0 °C which happened in 1914.
Highest Temperatures in Ottawa on October 21
Rank Temperature Year
1 25.0 °C 1914
2 24.5 °C 1979
3 22.6 °C 2007
4 22.2 °C 1920
5 22.0 °C 2017
6 21.7 °C 1936
7 19.0 °C 1978
8 18.5 °C 1977
9 18.3 °C 1904
9 18.3 °C 1929
What's the all-time low for Ottawa on 10/21?
For the date of Oct 21, the lowest temperature ever reached in Ottawa history is -7.8 °C which has happened 3 times, most recently in 1922.
Lowest Temperatures in Ottawa on October 21
Rank Temperature Year
1 -7.8 °C 1907
1 -7.8 °C 1922
1 -7.8 °C 1895
4 -5.6 °C 1959
4 -5.6 °C 1946
6 -5.0 °C 1948
6 -5.0 °C 1957
8 -4.4 °C 1940
9 -3.9 °C 1917
9 -3.9 °C 1909
9 -3.9 °C 1974
9 -3.9 °C 1952
Lowest High Temperatures in Ottawa on October 21
Rank Temperature Year
1 2.8 °C 1969
1 2.8 °C 1940
3 3.3 °C 1909
4 3.9 °C 1907
4 3.9 °C 1895
6 4.0 °C 2018
7 5.0 °C 1959
7 5.0 °C 1925
7 5.0 °C 1960
10 5.8 °C 1989
What's the most it has ever rained in Ottawa on 10/21?
For the date of Oct 21, the most precipitation ever recorded in Ottawa history is 5.39 cm which happened in 1995.
All-Time Most Precipitation in Ottawa on October 21
Rank Precipitation Year
1 5.39 cm 1995
2 2.46 cm 1891
3 2.04 cm 2016
4 1.83 cm 1904
5 1.56 cm 2021
6 1.24 cm 1996
7 1.19 cm 1934
7 1.19 cm 1970
7 1.19 cm 1913
10 1.18 cm 2020
All-Time Most Snow in Ottawa on October 21
Rank Precipitation Year
1 9.4 cm 1997
2 4.0 cm 1981
3 2.0 cm 1988
4 1.3 cm 1969
5 1.0 cm 1925
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.
© H Brothers Inc, 2021–2024
Contact us | Privacy policy