Waterloo April 21 Weather Records

Daily averages and all-time records for weather in Waterloo, Iowa for the date of April 21.
April 21 All-Time Records
1895–2024
Highest temperature 93 °F 1980
Lowest temperature 20 °F 2021
Lowest daily high 37 °F 1918
Highest daily low 59 °F 1985
Most precipitation 1.63 inches 1905
Most snow none -
April 21 Average Weather
1991–2020 1
Average high 61.7 °F
Average low 38.6 °F
Chance precipitation 40.1%
Chance snow 3.0%
Waterloo April 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 62 28 0.00 0.0
2023 50 34 0.01 0.0
2022 67 40 0.04 0.0
2021 49 20 0.00 0.0
2020 58 33 0.00 0.0
2019 86 51 0.00 0.0
2018 60 39 0.00 0.0
2017 59 34 0.00 0.0
2016 67 43 0.06 0.0
2015 50 35 0.00 0.0
2014 69 47 0.13 0.0
2013 62 39 0.10 0.0
2012 54 31 0.04 0.0
2011 51 25 0.00 0.0
2010 74 39 0.00 0.0
2009 61 37 0.00 0.0
2008 78 50 0.01 0.0
2007 81 51 0.00 0.0
2006 65 41 0.00 0.0
2005 56 47 0.01 0.0
2004 58 38 0.01 0.0
2003 62 38 0.01 0.0
2002 43 34 0.32 0.0
2001 69 48 0.02 0.0
2000 62 34 0.00 0.0
1999 62 40 0.52 0.0
1998 63 40 0.00 0.0
1997 61 40 0.00 0.0
1996 69 31 0.00 0.0
1995 46 37 0.03 0.0
1994 64 39 0.00 0.0
1993 60 28 0.00 0.0
1992 38 35 0.09 0.0
1991 57 32 0.00 0.0
1990 69 41 0.00 0.0
1989 75 41 0.00 0.0
1988 47 28 0.00 0.0
1987 53 42 0.56 0.0
1986 47 28 0.00 0.0
1985 86 59 0.15 0.0
1984 55 40 0.18 0.0
1983 63 30 0.00 0.0
1982 56 23 0.00 0.0
1981 53 31 0.00 0.0
1980 93 52 0.00 0.0
1979 64 41 0.00 0.0
1978 55 29 0.00 0.0
1977 58 41 0.27 0.0
1976 56 40 0.10 0.0
1975 52 30 0.30 0.0
1974 65 47 0.13 0.0
1973 71 50 0.06 0.0
1972 46 37 0.83 0.0
1971 56 33 0.00 0.0
1970 57 33 0.00 0.0
1969 63 43 0.00 0.0
1968 68 43 0.00 0.0
1967 58 40 0.00 0.0
1966 54 26 0.00 0.0
1965 70 41 0.00 0.0
1964 60 42 0.44 0.0
1963 58 31 0.00 0.0
1962 76 47 0.05 0.0
1961 67 36 0.09 0.0
1960 77 33 0.00 0.0
1959 58 28 0.00 0.0
1958 64 43 0.00 0.0
1957 68 40 0.00 0.0
1956 66 43 0.00 0.0
1955 75 39 0.00 0.0
1954 61 50 0.45 0.0
1953 71 30 0.00 0.0
1952 74 55 0.00 0.0
1951 n/a 39 0.31 0.0
1950 57 24 0.00 0.0
1949 71 45 0.00 0.0
1948 69 35 0.00 0.0
1947 59 31 0.00 0.0
1946 83 49 0.00 0.0
1945 58 35 n/a 0.0
1944 56 42 0.12 0.0
1943 70 29 0.00 0.0
1942 75 29 0.00 0.0
1941 51 34 0.00 0.0
1940 59 36 0.00 0.0
1939 53 35 0.00 0.0
1938 55 44 0.00 0.0
1937 54 47 n/a 0.0
1936 55 30 0.00 0.0
1935 66 48 0.00 0.0
1934 55 22 0.00 0.0
1933 68 47 0.00 0.0
1932 68 44 0.06 0.0
1931 45 36 0.12 0.0
1930 54 35 0.01 0.0
1929 61 40 0.00 0.0
1928 57 37 n/a 0.0
1927 44 32 0.33 0.0
1926 81 57 0.00 0.0
1925 80 44 n/a 0.0
1924 53 40 0.10 0.0
1923 62 51 n/a 0.0
1922 62 36 0.00 0.0
1921 64 52 0.43 0.0
1920 75 43 n/a 0.0
1919 70 44 n/a 0.0
1918 37 31 n/a n/a
1917 60 36 0.06 0.0
1916 54 38 0.02 0.0
1915 82 48 0.00 0.0
1914 58 31 0.00 0.0
1913 68 43 0.00 0.0
1912 61 37 n/a 0.0
1911 69 39 0.00 0.0
1910 66 33 n/a 0.0
1909 57 38 n/a 0.0
1908 81 41 0.00 0.0
1907 54 25 0.00 0.0
1906 73 40 0.00 0.0
1905 56 34 1.63 0.0
1904 48 25 n/a 0.0
1903 58 39 0.00 0.0
1902 87 52 0.00 0.0
1901 60 32 0.00 0.0
1900 65 50 0.00 0.0
1899 53 39 0.00 0.0
1898 55 34 n/a 0.0
1897 72 31 0.47 0.0
1896 57 35 0.00 0.0
1895 66 48 0.00 0.0
What's the all-time high for Waterloo on 4/21?
For the date of Apr 21, the highest temperature ever reached in Waterloo history is 93 °F which happened in 1980.
Highest Temperatures in Waterloo on April 21
Rank Temperature Year
1 93 °F 1980
2 87 °F 1902
3 86 °F 2019
3 86 °F 1985
5 83 °F 1946
6 82 °F 1915
7 81 °F 2007
7 81 °F 1926
7 81 °F 1908
10 80 °F 1925
What's the all-time low for Waterloo on 4/21?
For the date of Apr 21, the lowest temperature ever reached in Waterloo history is 20 °F which happened in 2021.
Lowest Temperatures in Waterloo on April 21
Rank Temperature Year
1 20 °F 2021
2 22 °F 1934
3 23 °F 1982
4 24 °F 1950
5 25 °F 2011
5 25 °F 1904
5 25 °F 1907
8 26 °F 1966
9 28 °F 1988
9 28 °F 1959
9 28 °F 2024
9 28 °F 1986
9 28 °F 1993
Lowest High Temperatures in Waterloo on April 21
Rank Temperature Year
1 37 °F 1918
2 38 °F 1992
3 43 °F 2002
4 44 °F 1927
5 45 °F 1931
6 46 °F 1972
6 46 °F 1995
8 47 °F 1986
8 47 °F 1988
10 48 °F 1904
What's the most it has ever rained in Waterloo on 4/21?
For the date of Apr 21, the most precipitation ever recorded in Waterloo history is 1.63 inches which happened in 1905.
All-Time Most Precipitation in Waterloo on April 21
Rank Precipitation Year
1 1.63 inches 1905
2 0.83 inches 1972
3 0.56 inches 1987
4 0.52 inches 1999
5 0.47 inches 1897
6 0.45 inches 1954
7 0.44 inches 1964
8 0.43 inches 1921
9 0.33 inches 1927
10 0.32 inches 2002
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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