Waterloo August 15 Weather Records

Daily averages and all-time records for weather in Waterloo, Iowa for the date of August 15.
August 15 All-Time Records
1895–2024
Highest temperature 104 °F 1988
Lowest temperature 42 °F 2004
Lowest daily high 66 °F 1897
Highest daily low 75 °F 1988
Most precipitation 2.13 inches 1977
Most snow none -
August 15 Average Weather
1991–2020 1
Average high 81.8 °F
Average low 59.9 °F
Chance precipitation 28.9%
Chance snow 0%
Waterloo August 15 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 83 54 0.00 0.0
2022 75 63 0.00 0.0
2021 85 52 0.00 0.0
2020 83 60 0.05 0.0
2019 79 56 0.00 0.0
2018 85 67 0.00 0.0
2017 74 59 0.00 0.0
2016 82 59 0.00 0.0
2015 88 63 0.00 0.0
2014 75 60 0.00 0.0
2013 76 54 0.00 0.0
2012 84 62 0.00 0.0
2011 84 54 0.00 0.0
2010 78 61 0.00 0.0
2009 81 67 0.00 0.0
2008 80 55 0.00 0.0
2007 82 65 0.38 0.0
2006 82 54 0.00 0.0
2005 79 52 0.00 0.0
2004 76 42 0.00 0.0
2003 93 63 0.00 0.0
2002 81 60 0.00 0.0
2001 67 57 0.78 0.0
2000 86 61 0.00 0.0
1999 80 57 0.00 0.0
1998 81 63 0.00 0.0
1997 85 61 0.18 0.0
1996 79 53 0.00 0.0
1995 81 64 0.76 0.0
1994 77 47 0.00 0.0
1993 86 68 0.87 0.0
1992 72 43 0.00 0.0
1991 85 59 0.00 0.0
1990 83 64 0.00 0.0
1989 82 56 0.00 0.0
1988 104 75 0.00 0.0
1987 90 71 0.00 0.0
1986 85 63 0.00 0.0
1985 77 51 0.00 0.0
1984 88 62 0.00 0.0
1983 92 66 0.00 0.0
1982 81 65 0.00 0.0
1981 82 61 0.04 0.0
1980 77 57 0.00 0.0
1979 68 48 0.00 0.0
1978 87 65 0.10 0.0
1977 76 49 2.13 0.0
1976 72 48 0.00 0.0
1975 81 60 0.00 0.0
1974 82 64 0.00 0.0
1973 80 57 0.00 0.0
1972 86 71 0.00 0.0
1971 76 51 0.00 0.0
1970 87 63 0.07 0.0
1969 79 49 0.08 0.0
1968 81 60 0.18 0.0
1967 82 61 0.00 0.0
1966 85 58 0.00 0.0
1965 88 61 0.00 0.0
1964 78 51 0.00 0.0
1963 79 49 0.00 0.0
1962 85 57 0.00 0.0
1961 86 59 0.00 0.0
1960 75 50 0.00 0.0
1959 76 60 0.88 0.0
1958 83 62 0.12 0.0
1957 88 65 0.00 0.0
1956 89 59 0.00 0.0
1955 92 55 0.00 0.0
1954 91 64 0.00 0.0
1953 78 54 0.00 0.0
1952 85 68 0.00 0.0
1951 75 63 0.92 0.0
1950 82 64 0.00 0.0
1949 87 67 0.00 0.0
1948 82 62 0.02 0.0
1947 85 57 0.00 0.0
1946 81 65 0.00 0.0
1945 74 53 0.00 0.0
1944 94 62 n/a 0.0
1943 85 60 n/a 0.0
1942 77 57 0.00 0.0
1941 89 62 0.00 0.0
1940 88 67 n/a 0.0
1939 92 67 0.00 0.0
1938 87 69 n/a 0.0
1937 94 68 0.00 0.0
1936 102 67 0.00 0.0
1935 86 60 0.00 0.0
1934 77 65 n/a 0.0
1933 93 52 0.00 0.0
1932 82 68 n/a 0.0
1931 92 62 0.00 0.0
1930 94 60 0.00 0.0
1929 78 42 0.00 0.0
1928 94 66 n/a 0.0
1927 84 55 n/a 0.0
1926 83 63 0.00 0.0
1925 86 57 0.00 0.0
1924 74 65 n/a 0.0
1923 83 55 n/a 0.0
1922 94 64 0.00 0.0
1921 70 50 n/a 0.0
1920 85 54 0.00 0.0
1919 85 68 0.00 0.0
1918 75 66 n/a 0.0
1917 84 54 0.00 0.0
1916 71 56 0.00 0.0
1915 86 60 0.00 0.0
1914 84 51 n/a 0.0
1913 93 71 0.00 0.0
1912 83 60 0.00 0.0
1911 89 66 0.00 0.0
1910 87 66 n/a 0.0
1909 95 74 n/a 0.0
1908 75 61 0.16 0.0
1907 84 62 n/a 0.0
1906 86 61 n/a 0.0
1905 82 66 0.06 0.0
1904 89 67 0.00 0.0
1903 76 60 0.00 0.0
1902 70 59 n/a 0.0
1901 90 58 0.00 0.0
1900 85 67 0.60 0.0
1899 82 50 0.00 0.0
1898 90 65 n/a 0.0
1897 66 60 0.00 0.0
1896 80 62 0.40 0.0
1895 83 63 0.00 0.0
What's the all-time high for Waterloo on 8/15?
For the date of Aug 15, the highest temperature ever reached in Waterloo history is 104 °F which happened in 1988.
Highest Temperatures in Waterloo on August 15
Rank Temperature Year
1 104 °F 1988
2 102 °F 1936
3 95 °F 1909
4 94 °F 1930
4 94 °F 1944
4 94 °F 1937
4 94 °F 1928
4 94 °F 1922
9 93 °F 1933
9 93 °F 1913
9 93 °F 2003
What's the all-time low for Waterloo on 8/15?
For the date of Aug 15, the lowest temperature ever reached in Waterloo history is 42 °F which has happened 2 times, most recently in 2004.
Lowest Temperatures in Waterloo on August 15
Rank Temperature Year
1 42 °F 2004
1 42 °F 1929
3 43 °F 1992
4 47 °F 1994
5 48 °F 1976
5 48 °F 1979
7 49 °F 1977
7 49 °F 1969
7 49 °F 1963
10 50 °F 1960
10 50 °F 1921
10 50 °F 1899
Lowest High Temperatures in Waterloo on August 15
Rank Temperature Year
1 66 °F 1897
2 67 °F 2001
3 68 °F 1979
4 70 °F 1921
4 70 °F 1902
6 71 °F 1916
7 72 °F 1992
7 72 °F 1976
9 74 °F 2017
9 74 °F 1924
9 74 °F 1945
What's the most it has ever rained in Waterloo on 8/15?
For the date of Aug 15, the most precipitation ever recorded in Waterloo history is 2.13 inches which happened in 1977.
All-Time Most Precipitation in Waterloo on August 15
Rank Precipitation Year
1 2.13 inches 1977
2 0.92 inches 1951
3 0.88 inches 1959
4 0.87 inches 1993
5 0.78 inches 2001
6 0.76 inches 1995
7 0.60 inches 1900
8 0.40 inches 1896
9 0.38 inches 2007
10 0.18 inches 1997
10 0.18 inches 1968
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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