Ottawa May 20 Weather Records

Daily averages and all-time records for weather in Ottawa, Ontario for the date of May 20.
May 20 All-Time Records
1889–2024
Highest temperature 33.3 °C 1911
Lowest temperature -1.1 °C 1929
Lowest daily high 6.1 °C 1895
Highest daily low 18.1 °C 1996
Most precipitation 2.90 cm 1986
Most snow none -
May 20 Average Weather
1991–2020 1
Average high 20.2 °C
Average low 9.0 °C
Chance precipitation 43.2%
Chance snow 0.2%
Ottawa May 20 Weather by Year
Year High (°C) Low (°C) Precip. (cm) Snow (cm)
2023 17.0 15.0 1.76 0.0
2022 27.0 7.0 0.00 0.0
2021 29.0 14.5 0.00 0.0
2020 n/a n/a n/a n/a
2019 21.5 12.5 0.00 0.0
2018 18.5 12.0 0.00 0.0
2017 18.5 5.0 0.00 0.0
2016 24.5 6.0 0.00 0.0
2015 15.3 3.7 0.00 0.0
2014 23.2 6.7 0.00 0.0
2013 22.0 13.5 0.47 0.0
2012 31.8 11.4 0.00 0.0
2011 25.2 14.5 0.00 0.0
2010 27.5 12.4 0.00 0.0
2009 24.8 7.4 0.07 0.0
2008 16.9 4.0 0.00 0.0
2007 14.6 8.9 0.19 0.0
2006 9.7 7.8 0.48 0.0
2005 20.4 6.5 0.00 0.0
2004 23.5 8.0 0.18 0.0
2003 24.6 12.0 0.63 0.0
2002 11.7 2.9 0.04 0.0
2001 23.1 8.9 0.00 0.0
2000 18.2 2.6 0.00 0.0
1999 19.0 5.0 0.00 0.0
1998 29.3 13.8 0.00 0.0
1997 13.7 8.0 0.00 0.0
1996 26.4 18.1 0.00 0.0
1995 19.8 5.8 0.02 0.0
1994 22.8 5.2 0.00 0.0
1993 17.5 5.3 0.00 0.0
1992 26.2 6.0 0.00 0.0
1991 23.3 4.4 0.00 0.0
1990 11.5 4.8 1.08 0.0
1989 28.7 14.8 0.12 0.0
1988 20.3 14.4 0.36 0.0
1987 18.0 7.7 0.00 0.0
1986 11.8 8.8 2.90 0.0
1985 25.3 7.2 0.87 0.0
1984 18.6 8.7 0.32 0.0
1983 20.5 11.0 0.02 0.0
1982 22.5 13.0 0.00 0.0
1981 20.5 3.5 0.00 0.0
1980 22.0 4.5 0.00 0.0
1979 24.0 14.5 0.98 0.0
1978 27.0 12.5 0.40 0.0
1977 26.5 15.5 0.00 0.0
1976 9.4 6.1 0.08 0.0
1975 31.7 15.0 0.00 0.0
1974 18.3 2.2 0.00 0.0
1973 19.4 4.4 0.00 0.0
1972 25.6 11.7 0.00 0.0
1971 25.6 16.1 0.28 0.0
1970 19.4 8.9 0.00 0.0
1969 17.2 10.6 0.08 0.0
1968 12.8 8.9 0.18 0.0
1967 12.2 5.6 0.00 0.0
1966 21.1 7.8 0.84 0.0
1965 18.3 9.4 0.00 0.0
1964 13.3 7.2 0.00 0.0
1963 14.4 10.0 0.00 0.0
1962 26.7 15.0 0.20 0.0
1961 18.9 2.8 0.05 0.0
1960 25.6 7.8 0.00 0.0
1959 27.8 13.3 0.00 0.0
1958 21.7 6.1 0.00 0.0
1957 11.7 7.2 0.13 0.0
1956 10.6 -0.6 0.00 0.0
1955 20.6 1.1 0.00 0.0
1954 17.8 2.8 0.00 0.0
1953 23.9 6.1 0.00 0.0
1952 18.9 8.3 2.08 0.0
1951 26.7 8.3 0.00 0.0
1950 21.7 4.4 0.00 0.0
1949 17.2 5.0 0.00 0.0
1948 16.1 5.6 0.56 0.0
1947 16.1 12.8 0.36 0.0
1946 16.7 5.6 0.61 0.0
1945 19.4 3.3 0.00 0.0
1944 20.6 0.0 0.00 0.0
1943 23.3 5.6 0.03 0.0
1942 18.9 11.1 0.00 0.0
1941 27.2 6.1 0.00 0.0
1940 23.3 11.1 0.00 0.0
1939 17.8 1.7 0.23 0.0
1938 17.2 11.7 1.98 0.0
1937 19.4 6.7 0.00 0.0
1936 9.4 0.6 0.00 0.0
1935 17.8 5.0 0.00 0.0
1934 23.3 7.8 0.00 0.0
1933 17.8 11.7 0.33 0.0
1932 18.3 9.4 0.36 0.0
1931 27.8 15.6 0.00 0.0
1930 11.7 6.7 2.44 0.0
1929 15.6 -1.1 0.00 0.0
1928 19.4 13.3 2.29 0.0
1927 16.1 6.1 1.35 0.0
1926 12.8 5.0 0.33 0.0
1925 25.6 8.9 0.00 0.0
1924 13.3 -0.6 0.00 0.0
1923 19.4 6.7 0.10 0.0
1922 16.1 12.2 0.00 0.0
1921 31.7 8.9 0.00 0.0
1920 24.4 13.9 0.03 0.0
1919 16.1 5.6 0.13 0.0
1918 26.1 15.6 0.00 0.0
1917 16.7 10.6 0.38 0.0
1916 16.1 6.7 0.03 0.0
1915 16.7 2.2 0.00 0.0
1914 29.4 10.0 0.00 0.0
1913 16.7 3.3 0.00 0.0
1912 11.7 3.3 0.38 0.0
1911 33.3 15.6 0.00 0.0
1910 22.2 3.3 0.00 0.0
1909 21.1 7.8 0.00 0.0
1908 21.7 13.9 0.36 0.0
1907 13.3 3.9 0.00 0.0
1906 12.8 -1.1 0.00 0.0
1905 12.8 1.1 0.00 0.0
1904 13.3 8.3 0.48 0.0
1903 29.4 16.7 0.00 0.0
1902 18.9 7.8 0.08 0.0
1901 15.0 10.0 0.71 0.0
1900 20.0 4.4 0.00 0.0
1899 n/a n/a n/a n/a
1898 21.7 12.8 0.13 0.0
1897 15.0 7.8 2.74 0.0
1896 21.1 4.4 0.00 0.0
1895 6.1 2.2 0.00 0.0
1894 21.7 10.6 0.69 0.0
1893 21.7 3.3 0.13 0.0
1892 14.4 6.1 0.00 0.0
1891 28.3 5.6 0.00 0.0
1890 11.1 5.0 1.45 0.0
What's the all-time high for Ottawa on 5/20?
For the date of May 20, the highest temperature ever reached in Ottawa history is 33.3 °C which happened in 1911.
Highest Temperatures in Ottawa on May 20
Rank Temperature Year
1 33.3 °C 1911
2 31.8 °C 2012
3 31.7 °C 1975
3 31.7 °C 1921
5 29.4 °C 1903
5 29.4 °C 1914
7 29.3 °C 1998
8 29.0 °C 2021
9 28.7 °C 1989
10 28.3 °C 1891
What's the all-time low for Ottawa on 5/20?
For the date of May 20, the lowest temperature ever reached in Ottawa history is -1.1 °C which has happened 2 times, most recently in 1929.
Lowest Temperatures in Ottawa on May 20
Rank Temperature Year
1 -1.1 °C 1929
1 -1.1 °C 1906
3 -0.6 °C 1924
3 -0.6 °C 1956
5 0.0 °C 1944
6 0.6 °C 1936
7 1.1 °C 1955
7 1.1 °C 1905
9 1.7 °C 1939
10 2.2 °C 1974
10 2.2 °C 1915
10 2.2 °C 1895
Lowest High Temperatures in Ottawa on May 20
Rank Temperature Year
1 6.1 °C 1895
2 9.4 °C 1976
2 9.4 °C 1936
4 9.7 °C 2006
5 10.6 °C 1956
6 11.1 °C 1890
7 11.5 °C 1990
8 11.7 °C 2002
8 11.7 °C 1930
8 11.7 °C 1957
8 11.7 °C 1912
What's the most it has ever rained in Ottawa on 5/20?
For the date of May 20, the most precipitation ever recorded in Ottawa history is 2.90 cm which happened in 1986.
All-Time Most Precipitation in Ottawa on May 20
Rank Precipitation Year
1 2.90 cm 1986
2 2.74 cm 1897
3 2.44 cm 1930
4 2.29 cm 1928
5 2.08 cm 1952
6 1.98 cm 1938
7 1.76 cm 2023
8 1.45 cm 1890
9 1.35 cm 1927
10 1.08 cm 1990
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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