Ottawa March 21 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of March 21.
March 21 All-Time Records
1889–2024
Highest temperature 26.7 °C 2012
Lowest temperature -21.7 °C 1939
Lowest daily high -9.4 °C 1930
Highest daily low 8.0 °C 2012
Most precipitation 4.30 cm 1980
Most snow 26.7 cm 1933
March 21 Average Weather
1991–2020 1
Average high 4.0 °C
Average low -5.1 °C
Chance precipitation 36.8%
Chance snow 19.5%
Ottawa March 21 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2024 -2.0 -10.5 0.00 0.0
2023 n/a n/a n/a n/a
2022 7.0 -1.0 0.00 0.0
2021 15.0 -2.5 0.00 0.0
2020 n/a n/a n/a n/a
2019 6.5 -0.5 1.00 0.0
2018 3.5 -9.5 0.00 0.0
2017 6.5 0.5 0.00 0.0
2016 4.0 -7.8 0.00 0.0
2015 1.9 0.0 0.52 0.0
2014 2.0 -3.4 0.18 2.0
2013 0.0 -7.1 0.12 1.7
2012 26.7 8.0 0.00 0.0
2011 1.5 -2.0 0.50 4.2
2010 4.6 -1.2 0.00 0.0
2009 6.0 -7.5 0.00 0.0
2008 -3.0 -11.7 0.00 0.0
2007 5.2 -15.0 0.99 0.0
2006 0.2 -8.4 0.00 0.0
2005 8.1 -6.6 0.00 0.0
2004 -3.3 -6.3 0.04 0.4
2003 7.8 -1.2 0.08 0.0
2002 -4.0 -5.5 0.45 4.5
2001 6.3 -4.2 0.62 2.0
2000 10.0 -0.2 0.00 0.0
1999 3.0 -4.6 1.40 14.0
1998 -1.0 -4.7 0.39 4.7
1997 3.0 -12.6 0.34 4.2
1996 3.0 -0.5 0.24 2.4
1995 9.5 4.4 0.38 0.0
1994 3.9 -9.2 0.76 0.0
1993 2.9 -3.6 0.24 2.4
1992 -5.7 -13.2 0.00 0.0
1991 -0.1 -6.1 0.00 0.0
1990 7.3 -0.7 0.00 0.0
1989 -1.3 -4.3 0.00 0.0
1988 -9.1 -19.1 0.00 0.0
1987 9.2 0.0 0.00 0.0
1986 -3.5 -16.5 0.00 0.0
1985 -2.2 -10.8 0.00 0.0
1984 6.3 0.3 0.28 0.0
1983 -2.0 -10.0 1.32 6.6
1982 0.5 -4.0 0.78 11.0
1981 5.0 -2.0 0.00 0.0
1980 4.0 1.0 4.30 1.2
1979 11.0 -1.5 0.00 0.0
1978 0.5 -7.5 1.70 2.6
1977 5.0 -1.7 0.08 0.5
1976 7.8 3.3 0.46 1.0
1975 0.0 -10.6 0.00 0.0
1974 -4.4 -9.4 0.69 14.0
1973 1.7 -3.9 0.00 0.0
1972 -0.6 -8.9 0.28 1.3
1971 0.6 -3.3 0.00 0.0
1970 5.0 0.0 0.00 0.0
1969 3.9 1.7 0.10 0.5
1968 4.4 2.2 0.43 0.0
1967 -0.6 -8.9 0.66 7.1
1966 3.3 -2.2 0.00 0.0
1965 -4.4 -13.9 0.00 0.0
1964 5.6 -2.2 0.00 0.0
1963 6.1 -2.8 0.00 0.0
1962 3.3 -0.6 0.18 0.0
1961 -0.6 -13.3 0.00 0.0
1960 -4.4 -8.9 0.00 0.0
1959 2.2 -2.2 0.58 1.3
1958 3.3 0.0 0.00 0.0
1957 7.8 -1.1 0.00 0.0
1956 2.8 -9.4 0.00 0.0
1955 -1.1 -6.7 1.12 3.8
1954 -4.4 -6.7 0.00 0.0
1953 10.6 -2.2 0.00 0.0
1952 5.6 -2.2 0.00 0.0
1951 0.0 -7.8 0.00 0.0
1950 5.0 -9.4 0.00 0.0
1949 -1.7 -8.9 0.13 1.3
1948 6.7 -0.6 0.00 0.0
1947 1.1 -9.4 0.00 0.0
1946 17.2 -2.2 0.00 0.0
1945 7.8 1.7 0.25 0.0
1944 0.0 -10.0 0.00 0.0
1943 0.6 -7.2 0.00 0.0
1942 3.3 -4.4 1.07 0.0
1941 1.1 -10.0 0.00 0.0
1940 -1.7 -13.9 0.76 7.6
1939 -5.0 -21.7 0.00 0.0
1938 8.9 0.0 0.00 0.0
1937 2.8 -1.7 0.00 0.0
1936 2.8 0.0 2.08 5.1
1935 5.6 -6.1 0.00 0.0
1934 1.7 -13.3 0.00 0.0
1933 0.0 -1.7 2.92 26.7
1932 -5.0 -21.7 0.00 0.0
1931 7.8 -8.3 0.00 0.0
1930 -9.4 -16.1 0.00 0.0
1929 9.4 -5.6 0.00 0.0
1928 2.8 -1.7 0.00 0.0
1927 -0.6 -3.3 0.53 5.3
1926 8.3 -14.4 0.00 0.0
1925 7.8 -4.4 0.13 0.0
1924 6.1 -3.3 0.00 0.0
1923 -3.3 -10.6 0.51 5.1
1922 2.8 -6.1 0.53 3.8
1921 12.8 1.7 0.38 0.0
1920 5.6 -6.1 0.00 0.0
1919 5.6 -1.1 0.00 0.0
1918 6.1 -1.1 0.00 0.0
1917 1.1 -12.8 0.00 0.0
1916 0.6 -12.2 0.00 0.0
1915 5.0 -1.7 0.58 2.5
1914 -1.7 -17.8 0.00 0.0
1913 13.9 1.7 0.81 0.0
1912 -7.8 -13.9 0.00 0.0
1911 1.1 -5.0 0.00 0.0
1910 5.6 -4.4 0.00 0.0
1909 -2.2 -11.7 0.00 0.0
1908 2.2 -15.0 0.00 0.0
1907 2.2 -11.7 0.00 0.0
1906 -1.1 -12.8 0.00 0.0
1905 1.7 -13.3 0.00 0.0
1904 -2.2 -12.2 0.00 0.0
1903 12.2 0.0 0.15 0.0
1902 11.1 1.7 0.00 0.0
1901 2.8 -1.7 1.45 0.0
1900 -2.2 -11.7 0.00 0.0
1899 -6.7 -20.0 0.00 0.0
1898 2.8 -3.9 0.00 0.0
1897 5.0 0.6 0.18 0.0
1896 0.6 -15.6 0.64 6.4
1895 0.0 -10.6 0.00 0.0
1894 1.1 -1.1 0.69 0.0
1893 4.4 -2.8 0.10 0.0
1892 -1.7 -16.7 0.00 0.0
1891 1.7 -2.2 1.73 0.0
1890 6.1 0.0 0.03 0.3
What's the all-time high for Ottawa on 3/21?
For the date of Mar 21, the highest temperature ever reached in Ottawa history is 26.7 °C which happened in 2012.
Highest Temperatures in Ottawa on March 21
Rank Temperature Year
1 26.7 °C 2012
2 17.2 °C 1946
3 15.0 °C 2021
4 13.9 °C 1913
5 12.8 °C 1921
6 12.2 °C 1903
7 11.1 °C 1902
8 11.0 °C 1979
9 10.6 °C 1953
10 10.0 °C 2000
What's the all-time low for Ottawa on 3/21?
For the date of Mar 21, the lowest temperature ever reached in Ottawa history is -21.7 °C which has happened 2 times, most recently in 1939.
Lowest Temperatures in Ottawa on March 21
Rank Temperature Year
1 -21.7 °C 1932
1 -21.7 °C 1939
3 -20.0 °C 1899
4 -19.1 °C 1988
5 -17.8 °C 1914
6 -16.7 °C 1892
7 -16.5 °C 1986
8 -16.1 °C 1930
9 -15.6 °C 1896
10 -15.0 °C 1908
10 -15.0 °C 2007
Lowest High Temperatures in Ottawa on March 21
Rank Temperature Year
1 -9.4 °C 1930
2 -9.1 °C 1988
3 -7.8 °C 1912
4 -6.7 °C 1899
5 -5.7 °C 1992
6 -5.0 °C 1932
6 -5.0 °C 1939
8 -4.4 °C 1954
8 -4.4 °C 1960
8 -4.4 °C 1974
8 -4.4 °C 1965
What's the most it has ever rained in Ottawa on 3/21?
For the date of Mar 21, the most precipitation ever recorded in Ottawa history is 4.30 cm which happened in 1980.
All-Time Most Precipitation in Ottawa on March 21
Rank Precipitation Year
1 4.30 cm 1980
2 2.92 cm 1933
3 2.08 cm 1936
4 1.73 cm 1891
5 1.70 cm 1978
6 1.45 cm 1901
7 1.40 cm 1999
8 1.32 cm 1983
9 1.12 cm 1955
10 1.07 cm 1942
All-Time Most Snow in Ottawa on March 21
Rank Precipitation Year
1 26.7 cm 1933
2 14.0 cm 1999
2 14.0 cm 1974
4 11.0 cm 1982
5 7.6 cm 1940
6 7.1 cm 1967
7 6.6 cm 1983
8 6.4 cm 1896
9 5.3 cm 1927
10 5.1 cm 1923
10 5.1 cm 1936
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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