Waterloo April 20 Weather Records

Daily averages and all-time records for weather in Waterloo, Iowa for the date of April 20.
April 20 All-Time Records
1895–2024
Highest temperature 89 °F 1987
Lowest temperature 21 °F 2018
Lowest daily high 35 °F 1914
Highest daily low 64 °F 1985
Most precipitation 2.65 inches 1979
Most snow 3.0 inches 1993
April 20 Average Weather
1991–2020 1
Average high 61.3 °F
Average low 38.3 °F
Chance precipitation 39.9%
Chance snow 3.1%
Waterloo April 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 47 33 0.00 0.0
2023 61 39 0.38 0.0
2022 50 45 0.42 0.0
2021 45 25 0.00 0.0
2020 67 27 0.00 0.0
2019 74 28 0.00 0.0
2018 57 21 0.00 0.0
2017 63 43 0.00 0.0
2016 63 45 0.19 0.0
2015 50 38 0.16 0.0
2014 79 53 0.26 0.0
2013 47 26 0.00 0.0
2012 55 34 0.00 0.0
2011 47 30 0.00 0.0
2010 70 34 0.00 0.0
2009 49 33 0.03 0.0
2008 69 44 0.00 0.0
2007 71 36 0.00 0.0
2006 61 43 0.00 0.0
2005 71 54 0.04 0.0
2004 55 36 0.63 0.0
2003 53 46 0.00 0.0
2002 56 43 0.20 0.0
2001 82 53 0.02 0.0
2000 52 38 0.18 0.0
1999 59 38 0.06 0.0
1998 51 42 0.60 0.0
1997 61 43 0.00 0.0
1996 52 33 0.25 0.0
1995 46 39 0.44 0.0
1994 56 32 0.15 0.0
1993 54 33 0.30 3.0
1992 61 38 0.80 0.0
1991 55 39 0.00 0.0
1990 70 48 0.22 0.0
1989 66 45 0.02 0.0
1988 60 33 0.38 0.0
1987 89 53 0.12 0.0
1986 59 41 0.00 0.0
1985 84 64 0.00 0.0
1984 60 42 0.00 0.0
1983 57 25 0.00 0.0
1982 46 28 0.00 0.0
1981 50 37 0.00 0.0
1980 84 41 0.00 0.0
1979 58 47 2.65 0.0
1978 39 35 0.10 0.4
1977 73 49 0.27 0.0
1976 57 41 1.13 0.0
1975 48 31 0.00 0.0
1974 74 51 0.16 0.0
1973 71 55 0.04 0.0
1972 56 39 0.00 0.0
1971 82 49 0.00 0.0
1970 44 35 0.00 0.0
1969 66 38 0.00 0.0
1968 62 51 0.27 0.0
1967 51 44 1.21 0.0
1966 39 30 0.00 0.0
1965 62 35 0.00 0.0
1964 53 41 0.77 0.0
1963 71 37 0.00 0.0
1962 57 32 0.36 0.0
1961 64 48 0.28 0.0
1960 65 46 0.08 0.0
1959 48 32 0.02 0.3
1958 66 46 0.00 0.0
1957 72 50 0.00 0.0
1956 64 24 0.00 0.0
1955 69 51 0.09 0.0
1954 59 44 0.08 0.0
1953 55 26 0.00 0.0
1952 77 48 0.00 0.0
1951 59 36 0.00 0.0
1950 49 30 0.00 0.0
1949 64 39 0.00 0.0
1948 75 44 0.00 0.0
1947 54 29 n/a 0.0
1946 68 45 0.00 0.0
1945 66 32 0.00 0.0
1944 54 43 n/a 0.0
1943 60 28 0.00 0.0
1942 72 29 0.00 0.0
1941 63 39 0.09 0.0
1940 65 43 0.00 0.0
1939 59 42 n/a 0.0
1938 63 37 0.00 0.0
1937 74 48 n/a 0.0
1936 71 41 0.00 0.0
1935 68 34 0.00 0.0
1934 51 28 0.00 0.0
1933 66 45 0.00 0.0
1932 60 45 n/a 0.0
1931 63 45 0.22 0.0
1930 44 40 n/a 0.0
1929 56 43 0.19 0.0
1928 52 27 n/a 0.0
1927 48 31 0.01 0.0
1926 75 40 0.00 0.0
1925 57 39 n/a 0.0
1924 54 29 0.00 0.0
1923 75 55 n/a 0.0
1922 67 26 0.00 0.0
1921 67 48 n/a 0.0
1920 62 43 0.65 0.0
1919 70 44 0.00 0.0
1918 43 31 n/a n/a
1917 67 56 1.05 0.0
1916 74 47 0.40 0.0
1915 82 48 0.00 0.0
1914 35 28 0.00 0.0
1913 65 39 0.00 0.0
1912 57 31 n/a 0.0
1911 56 40 0.00 0.0
1910 59 29 0.00 0.0
1909 55 38 n/a 0.0
1908 81 48 0.00 0.0
1907 51 29 0.00 0.0
1906 71 39 0.00 0.0
1905 67 44 n/a 0.0
1904 48 31 0.00 0.0
1903 64 47 0.03 0.0
1902 71 42 n/a 0.0
1901 60 29 0.00 0.0
1900 74 39 0.00 0.0
1899 57 45 n/a 0.0
1898 59 35 n/a 0.0
1897 42 26 n/a 0.0
1896 72 52 1.11 0.0
1895 80 40 0.00 0.0
What's the all-time high for Waterloo on 4/20?
For the date of Apr 20, the highest temperature ever reached in Waterloo history is 89 °F which happened in 1987.
Highest Temperatures in Waterloo on April 20
Rank Temperature Year
1 89 °F 1987
2 84 °F 1985
2 84 °F 1980
4 82 °F 2001
4 82 °F 1971
4 82 °F 1915
7 81 °F 1908
8 80 °F 1895
9 79 °F 2014
10 77 °F 1952
What's the all-time low for Waterloo on 4/20?
For the date of Apr 20, the lowest temperature ever reached in Waterloo history is 21 °F which happened in 2018.
Lowest Temperatures in Waterloo on April 20
Rank Temperature Year
1 21 °F 2018
2 24 °F 1956
3 25 °F 1983
3 25 °F 2021
5 26 °F 2013
5 26 °F 1922
5 26 °F 1897
5 26 °F 1953
9 27 °F 1928
9 27 °F 2020
Lowest High Temperatures in Waterloo on April 20
Rank Temperature Year
1 35 °F 1914
2 39 °F 1966
2 39 °F 1978
4 42 °F 1897
5 43 °F 1918
6 44 °F 1970
6 44 °F 1930
8 45 °F 2021
9 46 °F 1982
9 46 °F 1995
What's the most it has ever rained in Waterloo on 4/20?
For the date of Apr 20, the most precipitation ever recorded in Waterloo history is 2.65 inches which happened in 1979.
All-Time Most Precipitation in Waterloo on April 20
Rank Precipitation Year
1 2.65 inches 1979
2 1.21 inches 1967
3 1.13 inches 1976
4 1.11 inches 1896
5 1.05 inches 1917
6 0.80 inches 1992
7 0.77 inches 1964
8 0.65 inches 1920
9 0.63 inches 2004
10 0.60 inches 1998
All-Time Most Snow in Waterloo on April 20
Rank Precipitation Year
1 3.0 inches 1993
2 0.4 inches 1978
3 0.3 inches 1959
Weather Station Details
Years Station Coordinates
1950–2024 Waterloo Municipal Airport location
1895–1950 Waterloo location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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