Ottawa December 18 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of December 18.
December 18 All-Time Records
1889–2024
Highest temperature 6.5 °C 2023
Lowest temperature -27.8 °C 1893
Lowest daily high -19.4 °C 1944
Highest daily low 2.5 °C 2023
Most precipitation 2.64 cm 1921
Most snow 17.8 cm 1908
December 18 Average Weather
1991–2020 1
Average high -2.0 °C
Average low -9.1 °C
Chance precipitation 48.7%
Chance snow 36.3%
Ottawa December 18 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 6.5 2.5 0.66 2.0
2022 0.0 -5.5 0.00 0.0
2021 -4.0 -6.0 0.52 3.0
2020 -4.0 -13.5 0.00 0.0
2019 -4.0 -12.5 0.00 0.0
2018 -6.0 -9.5 0.00 0.0
2017 -8.5 -17.5 0.74 8.0
2016 -5.5 -10.5 0.08 0.8
2015 3.6 1.5 0.06 0.6
2014 -0.6 -2.2 0.00 0.0
2013 -6.5 -17.4 0.19 3.0
2012 1.1 -0.7 1.04 6.7
2011 1.3 -13.8 0.00 0.0
2010 -0.7 -10.7 0.04 1.5
2009 -10.0 -25.0 0.00 0.0
2008 -3.3 -8.5 0.02 0.4
2007 -9.5 -18.8 0.14 1.7
2006 5.4 1.5 0.00 0.0
2005 -0.2 -9.5 0.02 0.2
2004 1.3 -19.4 0.15 1.5
2003 -2.5 -6.0 0.10 1.0
2002 -3.1 -15.7 0.00 0.0
2001 2.3 -4.4 0.00 0.0
2000 -8.2 -10.0 0.00 0.0
1999 -6.8 -12.5 0.00 0.0
1998 -4.3 -10.3 0.04 0.2
1997 2.4 -12.2 0.00 0.0
1996 5.4 2.5 0.02 0.0
1995 -8.9 -17.4 0.00 0.0
1994 2.1 0.8 0.00 0.0
1993 -1.7 -6.8 0.32 3.5
1992 -2.2 -4.3 0.00 0.0
1991 -13.0 -17.5 0.00 0.0
1990 1.1 -5.1 1.29 2.2
1989 -10.2 -20.0 0.00 0.0
1988 -11.4 -15.6 0.06 1.2
1987 -4.2 -8.4 0.50 6.0
1986 1.4 -5.6 0.54 4.0
1985 -17.7 -20.3 0.00 0.0
1984 1.6 -1.3 0.00 0.0
1983 -10.8 -13.4 0.08 1.3
1982 -8.0 -16.0 0.00 0.0
1981 -6.5 -10.0 0.00 0.0
1980 -3.0 -27.0 0.16 1.0
1979 -17.0 -21.0 0.00 0.0
1978 -12.5 -16.5 0.00 0.0
1977 -1.0 -13.0 0.00 0.0
1976 -9.4 -12.8 0.00 0.0
1975 -12.2 -16.7 0.00 0.0
1974 1.1 -4.4 0.03 0.5
1973 -16.7 -19.4 0.00 0.0
1972 -1.1 -18.3 0.10 1.3
1971 -10.6 -16.1 0.00 0.0
1970 -2.8 -6.1 0.38 6.9
1969 -4.4 -12.2 0.56 4.8
1968 -3.9 -12.8 0.00 0.0
1967 2.2 -2.8 1.30 0.0
1966 2.8 -8.9 0.10 0.8
1965 -1.1 -7.8 0.23 2.5
1964 -6.1 -16.7 0.00 0.0
1963 -11.1 -18.9 0.10 2.5
1962 0.6 -6.1 0.08 1.3
1961 -2.8 -9.4 0.00 0.0
1960 -1.7 -11.1 0.20 2.5
1959 -1.7 -8.9 0.00 0.0
1958 -1.7 -24.4 0.36 3.6
1957 1.1 -13.9 0.89 0.0
1956 -6.7 -14.4 0.00 0.0
1955 -5.0 -6.7 0.00 0.0
1954 1.1 -7.8 0.61 6.1
1953 -7.2 -14.4 0.00 0.0
1952 -5.0 -6.1 0.00 0.0
1951 -9.4 -16.1 0.51 5.1
1950 -6.7 -7.8 0.00 0.0
1949 2.8 -5.0 1.55 0.0
1948 -2.2 -8.3 0.00 0.0
1947 -11.1 -13.9 0.00 0.0
1946 -4.4 -7.8 0.00 0.0
1945 -11.1 -16.7 0.00 0.0
1944 -19.4 -27.2 0.00 0.0
1943 -2.2 -2.8 0.00 0.0
1942 -19.4 -23.9 0.00 0.0
1941 3.9 -17.8 0.00 0.0
1940 -2.8 -20.6 0.00 0.0
1939 -1.1 -3.3 0.00 0.0
1938 -0.6 -5.6 0.36 3.6
1937 1.1 -2.8 0.00 0.0
1936 -8.9 -14.4 0.00 0.0
1935 -5.0 -10.6 0.00 0.0
1934 -3.3 -20.6 0.00 0.0
1933 1.7 -5.6 0.00 0.0
1932 -10.0 -24.4 0.13 1.3
1931 -7.8 -12.2 0.00 0.0
1930 -4.4 -15.0 0.00 0.0
1929 -8.9 -11.1 1.09 10.9
1928 -2.2 -5.0 0.43 0.0
1927 -5.6 -12.8 0.00 0.0
1926 -16.1 -23.9 0.00 0.0
1925 0.0 -10.6 0.15 1.5
1924 -7.8 -16.7 0.00 0.0
1923 -8.3 -16.1 0.00 0.0
1922 -4.4 -15.6 0.00 0.0
1921 5.6 -1.1 2.64 0.8
1920 -1.7 -6.7 0.00 0.0
1919 -15.0 -27.2 0.00 0.0
1918 -3.9 -7.2 0.00 0.0
1917 -10.6 -18.3 0.00 0.0
1916 -7.8 -17.8 0.00 0.0
1915 0.6 -3.9 0.28 0.0
1914 -6.7 -16.7 0.00 0.0
1913 1.7 -6.7 0.00 0.0
1912 -1.7 -11.1 0.00 0.0
1911 -1.7 -5.6 0.00 0.0
1910 -10.6 -15.0 0.00 0.0
1909 -7.8 -13.9 0.00 0.0
1908 -6.7 -15.6 1.78 17.8
1907 -8.3 -10.0 0.00 0.0
1906 -8.3 -18.3 0.00 0.0
1905 0.6 -12.8 0.00 0.0
1904 -8.3 -20.0 0.00 0.0
1903 -12.2 -21.7 0.00 0.0
1902 2.2 -4.4 0.18 1.8
1901 -13.3 -21.1 0.00 0.0
1900 -15.0 -23.3 0.00 0.0
1899 0.0 -7.2 0.00 0.0
1898 2.8 -8.9 0.00 0.0
1897 -3.3 -15.0 0.25 2.5
1896 -4.4 -9.4 0.51 5.1
1895 5.6 -8.3 0.00 0.0
1894 -4.4 -11.1 0.00 0.0
1893 -13.9 -27.8 1.02 10.2
1892 -9.4 -20.0 1.02 10.2
1891 -3.3 -16.7 0.00 0.0
1890 -2.2 -11.7 0.00 0.0
1889 1.7 -4.4 0.00 0.0
What's the all-time high for Ottawa on 12/18?
For the date of Dec 18, the highest temperature ever reached in Ottawa history is 6.5 °C which happened in 2023.
Highest Temperatures in Ottawa on December 18
Rank Temperature Year
1 6.5 °C 2023
2 5.6 °C 1895
2 5.6 °C 1921
4 5.4 °C 1996
4 5.4 °C 2006
6 3.9 °C 1941
7 3.6 °C 2015
8 2.8 °C 1949
8 2.8 °C 1966
8 2.8 °C 1898
What's the all-time low for Ottawa on 12/18?
For the date of Dec 18, the lowest temperature ever reached in Ottawa history is -27.8 °C which happened in 1893.
Lowest Temperatures in Ottawa on December 18
Rank Temperature Year
1 -27.8 °C 1893
2 -27.2 °C 1919
2 -27.2 °C 1944
4 -27.0 °C 1980
5 -25.0 °C 2009
6 -24.4 °C 1932
6 -24.4 °C 1958
8 -23.9 °C 1926
8 -23.9 °C 1942
10 -23.3 °C 1900
Lowest High Temperatures in Ottawa on December 18
Rank Temperature Year
1 -19.4 °C 1942
1 -19.4 °C 1944
3 -17.7 °C 1985
4 -17.0 °C 1979
5 -16.7 °C 1973
6 -16.1 °C 1926
7 -15.0 °C 1919
7 -15.0 °C 1900
9 -13.9 °C 1893
10 -13.3 °C 1901
What's the most it has ever rained in Ottawa on 12/18?
For the date of Dec 18, the most precipitation ever recorded in Ottawa history is 2.64 cm which happened in 1921.
All-Time Most Precipitation in Ottawa on December 18
Rank Precipitation Year
1 2.64 cm 1921
2 1.78 cm 1908
3 1.55 cm 1949
4 1.30 cm 1967
5 1.29 cm 1990
6 1.09 cm 1929
7 1.04 cm 2012
8 1.02 cm 1893
8 1.02 cm 1892
10 0.89 cm 1957
All-Time Most Snow in Ottawa on December 18
Rank Precipitation Year
1 17.8 cm 1908
2 10.9 cm 1929
3 10.2 cm 1892
3 10.2 cm 1893
5 8.0 cm 2017
6 6.9 cm 1970
7 6.7 cm 2012
8 6.1 cm 1954
9 6.0 cm 1987
10 5.1 cm 1896
10 5.1 cm 1951
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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