Ottawa December 21 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of December 21.
December 21 All-Time Records
1889–2024
Highest temperature 11.1 °C 1895
Lowest temperature -31.7 °C 1942
Lowest daily high -20.6 °C 1955
Highest daily low 5.0 °C 1957
Most precipitation 2.46 cm 1977
Most snow 24.6 cm 1977
December 21 Average Weather
1991–2020 1
Average high -2.5 °C
Average low -9.8 °C
Chance precipitation 48.7%
Chance snow 37.6%
Ottawa December 21 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 -4.5 -10.0 0.00 0.0
2022 0.0 -6.0 0.00 0.0
2021 -1.0 -4.0 0.04 1.0
2020 4.0 -1.5 0.00 0.0
2019 -8.0 -14.0 0.00 0.0
2018 5.0 0.0 0.74 2.0
2017 -10.5 -14.5 0.00 0.0
2016 4.0 -6.0 0.44 6.0
2015 4.3 -3.3 1.48 0.0
2014 -6.9 -11.9 0.00 0.0
2013 -5.0 -7.5 1.80 12.0
2012 1.2 -2.5 1.99 19.9
2011 1.0 -9.0 1.46 0.0
2010 -2.7 -6.3 0.00 0.0
2009 -7.8 -15.0 0.00 0.0
2008 -10.6 -19.0 0.68 9.0
2007 -2.8 -7.8 0.00 0.0
2006 4.5 -2.8 0.00 0.0
2005 -10.6 -21.5 0.60 6.0
2004 -11.0 -26.0 0.06 0.6
2003 1.6 -16.6 0.03 0.3
2002 2.4 0.0 0.00 0.0
2001 -1.9 -3.3 0.00 0.0
2000 -9.3 -16.7 0.22 5.0
1999 -0.9 -3.1 0.00 0.0
1998 0.8 -7.7 2.00 6.4
1997 -8.9 -16.2 0.00 0.0
1996 -1.5 -10.6 0.02 0.2
1995 -4.7 -13.3 0.00 0.0
1994 7.2 0.7 0.00 0.0
1993 1.0 0.2 1.86 15.4
1992 -3.3 -11.7 0.00 0.0
1991 2.6 -3.3 0.03 0.3
1990 1.3 -14.0 1.54 1.4
1989 -18.7 -24.6 0.00 0.0
1988 4.6 -0.4 0.00 0.0
1987 2.8 -0.4 0.00 0.0
1986 -3.6 -12.8 0.00 0.0
1985 -9.9 -14.7 0.02 0.2
1984 3.9 -13.9 0.85 8.3
1983 -11.5 -26.8 0.66 5.0
1982 -4.0 -6.5 0.10 2.6
1981 0.0 -15.0 0.08 0.8
1980 -15.0 -25.0 0.06 0.6
1979 -4.0 -13.5 0.00 0.0
1978 -5.0 -14.0 0.02 0.2
1977 -2.0 -3.5 2.46 24.6
1976 -14.4 -16.1 0.00 0.0
1975 -10.6 -20.0 0.00 0.0
1974 -2.8 -5.0 0.08 0.5
1973 -7.8 -10.0 0.13 1.3
1972 -2.8 -15.0 0.36 1.8
1971 2.8 -7.2 0.08 0.8
1970 -15.0 -20.6 0.00 0.0
1969 -1.1 -13.3 0.15 4.1
1968 -2.2 -7.2 0.00 0.0
1967 8.9 -4.4 0.64 0.0
1966 -5.0 -9.4 0.15 1.0
1965 -3.3 -18.9 0.00 0.0
1964 -8.3 -13.3 0.25 2.5
1963 -11.7 -21.1 0.00 0.0
1962 -12.2 -28.3 0.23 4.6
1961 -7.8 -9.4 0.00 0.0
1960 -6.1 -13.3 0.28 6.4
1959 -11.1 -18.9 0.00 0.0
1958 -19.4 -25.6 0.00 0.0
1957 8.3 5.0 0.20 0.0
1956 7.8 -1.1 0.00 0.0
1955 -20.6 -28.9 0.00 0.0
1954 -13.9 -22.8 0.00 0.0
1953 2.8 1.1 1.17 0.0
1952 -4.4 -6.1 0.05 0.5
1951 0.0 -6.7 0.64 6.4
1950 -2.8 -16.7 0.76 7.6
1949 8.3 1.7 1.68 0.0
1948 -1.7 -6.1 0.81 8.1
1947 -4.4 -17.2 0.18 1.8
1946 -3.3 -5.6 0.13 1.3
1945 -13.3 -23.9 0.00 0.0
1944 -20.6 -22.8 0.00 0.0
1943 -0.6 -16.7 0.05 0.5
1942 -18.9 -31.7 0.00 0.0
1941 -16.1 -25.0 0.00 0.0
1940 1.7 0.0 0.08 0.8
1939 -1.1 -2.2 0.53 5.3
1938 -2.8 -12.2 0.03 0.3
1937 -11.1 -30.6 0.46 4.6
1936 -6.1 -11.1 0.00 0.0
1935 -16.7 -22.2 0.00 0.0
1934 -12.2 -14.4 0.08 0.8
1933 -6.7 -10.0 0.89 8.9
1932 2.8 -7.8 0.00 0.0
1931 -2.8 -17.2 0.00 0.0
1930 0.0 -7.2 0.00 0.0
1929 -9.4 -14.4 0.00 0.0
1928 -8.3 -15.0 0.25 2.5
1927 -0.6 -7.2 0.00 0.0
1926 -0.6 -10.6 0.61 6.1
1925 2.2 -4.4 1.09 10.9
1924 -16.1 -30.0 0.00 0.0
1923 6.1 0.6 0.46 0.0
1922 -1.1 -12.8 0.00 0.0
1921 -7.2 -19.4 0.00 0.0
1920 -3.3 -12.8 0.00 0.0
1919 -8.3 -15.6 0.00 0.0
1918 3.3 -5.0 0.00 0.0
1917 2.8 0.6 0.08 0.0
1916 -7.8 -10.6 0.38 3.8
1915 -5.0 -13.9 0.00 0.0
1914 -3.3 -15.0 1.27 12.7
1913 1.7 -6.7 0.00 0.0
1912 -10.6 -20.6 0.00 0.0
1911 -1.1 -11.7 0.00 0.0
1910 -5.6 -16.7 0.00 0.0
1909 -5.6 -9.4 0.00 0.0
1908 -5.0 -12.8 0.76 7.6
1907 -1.1 -5.6 0.00 0.0
1906 -2.8 -11.1 0.89 8.9
1905 -2.2 -7.8 1.52 15.2
1904 -14.4 -23.3 0.00 0.0
1903 0.0 -8.9 0.13 1.3
1902 -2.8 -14.4 0.69 1.3
1901 -13.9 -25.0 0.00 0.0
1900 2.8 -16.7 0.00 0.0
1899 2.8 -1.1 0.00 0.0
1898 2.8 -3.3 0.25 0.0
1897 -11.1 -16.1 0.51 5.1
1896 -14.4 -22.2 0.00 0.0
1895 11.1 1.1 0.00 0.0
1894 6.7 -1.7 0.00 0.0
1893 2.2 -17.2 0.00 0.0
1892 -7.8 -16.1 0.00 0.0
1891 -2.8 -6.7 0.00 0.0
1890 2.2 -17.8 0.53 0.0
1889 1.1 -10.6 1.50 5.1
What's the all-time high for Ottawa on 12/21?
For the date of Dec 21, the highest temperature ever reached in Ottawa history is 11.1 °C which happened in 1895.
Highest Temperatures in Ottawa on December 21
Rank Temperature Year
1 11.1 °C 1895
2 8.9 °C 1967
3 8.3 °C 1949
3 8.3 °C 1957
5 7.8 °C 1956
6 7.2 °C 1994
7 6.7 °C 1894
8 6.1 °C 1923
9 5.0 °C 2018
10 4.6 °C 1988
What's the all-time low for Ottawa on 12/21?
For the date of Dec 21, the lowest temperature ever reached in Ottawa history is -31.7 °C which happened in 1942.
Lowest Temperatures in Ottawa on December 21
Rank Temperature Year
1 -31.7 °C 1942
2 -30.6 °C 1937
3 -30.0 °C 1924
4 -28.9 °C 1955
5 -28.3 °C 1962
6 -26.8 °C 1983
7 -26.0 °C 2004
8 -25.6 °C 1958
9 -25.0 °C 1980
9 -25.0 °C 1901
9 -25.0 °C 1941
Lowest High Temperatures in Ottawa on December 21
Rank Temperature Year
1 -20.6 °C 1944
1 -20.6 °C 1955
3 -19.4 °C 1958
4 -18.9 °C 1942
5 -18.7 °C 1989
6 -16.7 °C 1935
7 -16.1 °C 1924
7 -16.1 °C 1941
9 -15.0 °C 1970
9 -15.0 °C 1980
What's the most it has ever rained in Ottawa on 12/21?
For the date of Dec 21, the most precipitation ever recorded in Ottawa history is 2.46 cm which happened in 1977.
All-Time Most Precipitation in Ottawa on December 21
Rank Precipitation Year
1 2.46 cm 1977
2 2.00 cm 1998
3 1.99 cm 2012
4 1.86 cm 1993
5 1.80 cm 2013
6 1.68 cm 1949
7 1.54 cm 1990
8 1.52 cm 1905
9 1.50 cm 1889
10 1.48 cm 2015
All-Time Most Snow in Ottawa on December 21
Rank Precipitation Year
1 24.6 cm 1977
2 19.9 cm 2012
3 15.4 cm 1993
4 15.2 cm 1905
5 12.7 cm 1914
6 12.0 cm 2013
7 10.9 cm 1925
8 9.0 cm 2008
9 8.9 cm 1906
9 8.9 cm 1933
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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