Waterloo May 15 Weather Records

Daily averages and all-time records for weather in Waterloo, Iowa for the date of May 15.
May 15 All-Time Records
1895–2024
Highest temperature 92 °F 2001
Lowest temperature 32 °F 2016
Lowest daily high 46 °F 1907
Highest daily low 69 °F 2001
Most precipitation 1.13 inches 1986
Most snow none -
May 15 Average Weather
1991–2020 1
Average high 71.1 °F
Average low 48.5 °F
Chance precipitation 41.3%
Chance snow 0.2%
Waterloo May 15 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 73 52 0.00 0.0
2022 77 52 0.00 0.0
2021 72 53 0.11 0.0
2020 74 51 0.00 0.0
2019 80 40 0.00 0.0
2018 80 53 0.00 0.0
2017 87 60 0.00 0.0
2016 65 32 0.00 0.0
2015 74 58 0.00 0.0
2014 49 42 0.35 0.0
2013 80 56 0.00 0.0
2012 90 55 0.00 0.0
2011 65 44 0.07 0.0
2010 72 42 0.00 0.0
2009 62 52 0.08 0.0
2008 69 38 0.00 0.0
2007 67 47 0.16 0.0
2006 67 47 0.09 0.0
2005 53 35 0.00 0.0
2004 64 32 0.00 0.0
2003 67 47 0.00 0.0
2002 76 51 0.00 0.0
2001 92 69 0.00 0.0
2000 74 36 0.04 0.0
1999 66 56 0.02 0.0
1998 82 62 0.02 0.0
1997 56 34 0.00 0.0
1996 64 51 0.00 0.0
1995 75 40 0.00 0.0
1994 78 52 0.00 0.0
1993 69 47 0.11 0.0
1992 72 51 0.00 0.0
1991 82 60 0.42 0.0
1990 65 48 0.32 0.0
1989 82 46 0.00 0.0
1988 83 53 0.00 0.0
1987 77 45 0.00 0.0
1986 61 53 1.13 0.0
1985 58 52 0.00 0.0
1984 72 46 0.00 0.0
1983 60 37 0.00 0.0
1982 80 61 0.23 0.0
1981 77 43 0.00 0.0
1980 66 39 0.00 0.0
1979 68 38 0.00 0.0
1978 63 48 0.00 0.0
1977 87 63 0.15 0.0
1976 65 50 0.08 0.0
1975 65 44 0.00 0.0
1974 59 44 0.00 0.0
1973 71 33 0.00 0.0
1972 72 45 0.00 0.0
1971 85 49 0.02 0.0
1970 52 40 0.03 0.0
1969 79 52 0.00 0.0
1968 84 49 0.03 0.0
1967 61 38 0.00 0.0
1966 64 47 0.13 0.0
1965 77 59 0.12 0.0
1964 82 54 0.00 0.0
1963 67 49 0.00 0.0
1962 86 68 0.00 0.0
1961 59 43 0.00 0.0
1960 81 51 0.00 0.0
1959 59 40 0.00 0.0
1958 81 58 0.00 0.0
1957 56 46 0.00 0.0
1956 66 42 0.00 0.0
1955 77 42 0.00 0.0
1954 83 53 0.00 0.0
1953 72 47 0.00 0.0
1952 66 45 0.00 0.0
1951 83 60 0.00 0.0
1950 71 46 0.00 0.0
1949 72 53 0.00 0.0
1948 75 56 n/a 0.0
1947 71 58 0.30 0.0
1946 68 48 n/a 0.0
1945 58 39 0.12 0.0
1944 90 60 n/a 0.0
1943 62 45 n/a 0.0
1942 55 38 0.00 0.0
1941 87 66 n/a 0.0
1940 50 36 n/a 0.0
1939 69 46 n/a 0.0
1938 67 46 0.00 0.0
1937 58 42 n/a 0.0
1936 78 54 0.00 0.0
1935 58 43 n/a 0.0
1934 74 38 0.00 0.0
1933 78 51 n/a 0.0
1932 87 57 n/a 0.0
1931 87 48 0.00 0.0
1930 60 45 n/a 0.0
1929 68 38 0.02 0.0
1928 76 59 n/a 0.0
1927 62 39 0.00 0.0
1926 84 35 0.00 0.0
1925 75 43 n/a 0.0
1924 69 40 0.32 0.0
1923 63 49 n/a 0.0
1922 69 51 n/a 0.0
1921 56 33 0.00 0.0
1920 70 35 0.00 0.0
1919 70 52 0.12 0.0
1918 76 43 0.00 0.0
1917 73 41 0.00 0.0
1916 72 46 0.00 0.0
1915 70 50 0.04 0.0
1914 67 33 0.00 0.0
1913 59 49 0.35 0.0
1912 60 40 n/a 0.0
1911 76 62 n/a 0.0
1910 72 41 n/a 0.0
1909 73 58 1.05 0.0
1908 65 48 n/a 0.0
1907 46 35 0.07 0.0
1906 82 58 n/a 0.0
1905 64 46 0.37 0.0
1904 57 33 0.00 0.0
1903 79 50 0.00 0.0
1902 67 40 0.00 0.0
1901 78 53 n/a 0.0
1900 75 57 0.10 0.0
1899 66 43 0.66 0.0
1898 66 51 0.00 0.0
1897 64 40 0.00 0.0
1896 62 44 0.12 0.0
1895 56 40 0.00 0.0
What's the all-time high for Waterloo on 5/15?
For the date of May 15, the highest temperature ever reached in Waterloo history is 92 °F which happened in 2001.
Highest Temperatures in Waterloo on May 15
Rank Temperature Year
1 92 °F 2001
2 90 °F 1944
2 90 °F 2012
4 87 °F 1931
4 87 °F 1932
4 87 °F 2017
4 87 °F 1941
4 87 °F 1977
9 86 °F 1962
10 85 °F 1971
What's the all-time low for Waterloo on 5/15?
For the date of May 15, the lowest temperature ever reached in Waterloo history is 32 °F which has happened 2 times, most recently in 2016.
Lowest Temperatures in Waterloo on May 15
Rank Temperature Year
1 32 °F 2004
1 32 °F 2016
3 33 °F 1904
3 33 °F 1973
3 33 °F 1914
3 33 °F 1921
7 34 °F 1997
8 35 °F 1926
8 35 °F 2005
8 35 °F 1920
8 35 °F 1907
Lowest High Temperatures in Waterloo on May 15
Rank Temperature Year
1 46 °F 1907
2 49 °F 2014
3 50 °F 1940
4 52 °F 1970
5 53 °F 2005
6 55 °F 1942
7 56 °F 1895
7 56 °F 1921
7 56 °F 1997
7 56 °F 1957
What's the most it has ever rained in Waterloo on 5/15?
For the date of May 15, the most precipitation ever recorded in Waterloo history is 1.13 inches which happened in 1986.
All-Time Most Precipitation in Waterloo on May 15
Rank Precipitation Year
1 1.13 inches 1986
2 1.05 inches 1909
3 0.66 inches 1899
4 0.42 inches 1991
5 0.37 inches 1905
6 0.35 inches 1913
6 0.35 inches 2014
8 0.32 inches 1990
8 0.32 inches 1924
10 0.30 inches 1947
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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