Waterloo September 18 Weather Records

Daily averages and all-time records for weather in Waterloo, Iowa for the date of September 18.
September 18 All-Time Records
1895–2024
Highest temperature 93 °F 1955
Lowest temperature 28 °F 1929
Lowest daily high 50 °F 1900
Highest daily low 71 °F 1985
Most precipitation 1.34 inches 2018
Most snow none -
September 18 Average Weather
1991–2020 1
Average high 74.7 °F
Average low 50.1 °F
Chance precipitation 29.8%
Chance snow 0%
Waterloo September 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 82 41 0.00 0.0
2022 84 62 0.00 0.0
2021 82 47 0.00 0.0
2020 67 41 0.00 0.0
2019 83 69 0.12 0.0
2018 69 60 1.34 0.0
2017 73 49 0.02 0.0
2016 84 50 0.00 0.0
2015 71 53 0.25 0.0
2014 73 43 0.00 0.0
2013 89 63 0.05 0.0
2012 63 38 0.00 0.0
2011 61 57 0.43 0.0
2010 63 47 0.45 0.0
2009 81 48 0.00 0.0
2008 81 56 0.00 0.0
2007 82 63 0.42 0.0
2006 57 44 0.00 0.0
2005 85 62 0.00 0.0
2004 81 58 0.00 0.0
2003 82 48 0.82 0.0
2002 79 64 0.22 0.0
2001 65 50 0.00 0.0
2000 90 63 0.00 0.0
1999 82 40 0.00 0.0
1998 85 56 0.00 0.0
1997 82 55 0.00 0.0
1996 74 39 0.00 0.0
1995 65 52 0.07 0.0
1994 84 49 0.00 0.0
1993 61 54 0.01 0.0
1992 72 42 0.24 0.0
1991 54 42 0.00 0.0
1990 57 51 0.56 0.0
1989 80 58 0.00 0.0
1988 88 70 0.00 0.0
1987 71 50 0.00 0.0
1986 75 58 0.00 0.0
1985 90 71 0.00 0.0
1984 83 50 0.00 0.0
1983 73 50 0.00 0.0
1982 67 44 0.00 0.0
1981 68 35 0.00 0.0
1980 72 49 0.00 0.0
1979 78 52 0.00 0.0
1978 84 61 0.00 0.0
1977 73 58 0.64 0.0
1976 81 40 0.00 0.0
1975 73 50 0.03 0.0
1974 80 51 0.00 0.0
1973 64 35 0.00 0.0
1972 87 62 0.00 0.0
1971 57 46 0.11 0.0
1970 73 45 0.00 0.0
1969 63 47 0.00 0.0
1968 63 53 0.08 0.0
1967 73 56 0.03 0.0
1966 77 49 0.00 0.0
1965 75 57 0.23 0.0
1964 64 57 0.00 0.0
1963 87 64 0.00 0.0
1962 75 44 0.00 0.0
1961 77 52 0.00 0.0
1960 72 56 1.02 0.0
1959 57 38 0.11 0.0
1958 71 44 0.00 0.0
1957 78 52 0.00 0.0
1956 69 42 0.05 0.0
1955 93 69 0.00 0.0
1954 88 63 0.00 0.0
1953 82 56 0.00 0.0
1952 75 53 0.00 0.0
1951 78 39 0.00 0.0
1950 90 59 0.00 0.0
1949 78 46 0.01 0.0
1948 91 71 0.00 0.0
1947 89 68 0.00 0.0
1946 80 53 0.00 0.0
1945 78 57 0.00 0.0
1944 83 65 n/a 0.0
1943 70 42 n/a 0.0
1942 78 68 n/a 0.0
1941 78 48 0.00 0.0
1940 88 65 0.00 0.0
1939 79 49 0.00 0.0
1938 54 43 0.64 0.0
1937 80 53 0.00 0.0
1936 69 44 0.00 0.0
1935 89 65 n/a 0.0
1934 73 50 n/a 0.0
1933 89 48 0.00 0.0
1932 81 49 n/a 0.0
1931 70 60 0.12 0.0
1930 91 48 n/a 0.0
1929 58 28 n/a 0.0
1928 80 41 0.00 0.0
1927 67 43 n/a 0.0
1926 82 71 n/a 0.0
1925 88 66 0.00 0.0
1924 73 43 0.00 0.0
1923 68 57 0.35 0.0
1922 59 50 0.60 0.0
1921 74 41 n/a 0.0
1920 90 57 0.00 0.0
1919 70 62 0.39 0.0
1918 63 42 n/a 0.0
1917 82 47 n/a 0.0
1916 63 31 0.00 0.0
1915 83 55 0.00 0.0
1914 88 61 0.00 0.0
1913 72 48 0.00 0.0
1912 67 45 0.00 0.0
1911 82 53 n/a 0.0
1910 88 62 0.00 0.0
1909 84 53 0.00 0.0
1908 92 66 0.00 0.0
1907 85 65 0.00 0.0
1906 81 64 n/a 0.0
1905 76 64 n/a 0.0
1904 70 57 0.00 0.0
1903 55 33 0.00 0.0
1902 69 41 0.00 0.0
1901 57 33 n/a 0.0
1900 50 40 n/a 0.0
1899 72 45 0.00 0.0
1898 86 57 0.00 0.0
1897 82 42 0.00 0.0
1896 57 45 n/a 0.0
1895 84 62 0.00 0.0
What's the all-time high for Waterloo on 9/18?
For the date of Sep 18, the highest temperature ever reached in Waterloo history is 93 °F which happened in 1955.
Highest Temperatures in Waterloo on September 18
Rank Temperature Year
1 93 °F 1955
2 92 °F 1908
3 91 °F 1948
3 91 °F 1930
5 90 °F 1985
5 90 °F 2000
5 90 °F 1920
5 90 °F 1950
9 89 °F 1933
9 89 °F 2013
9 89 °F 1947
9 89 °F 1935
What's the all-time low for Waterloo on 9/18?
For the date of Sep 18, the lowest temperature ever reached in Waterloo history is 28 °F which happened in 1929.
Lowest Temperatures in Waterloo on September 18
Rank Temperature Year
1 28 °F 1929
2 31 °F 1916
3 33 °F 1903
3 33 °F 1901
5 35 °F 1973
5 35 °F 1981
7 38 °F 2012
7 38 °F 1959
9 39 °F 1996
9 39 °F 1951
Lowest High Temperatures in Waterloo on September 18
Rank Temperature Year
1 50 °F 1900
2 54 °F 1938
2 54 °F 1991
4 55 °F 1903
5 57 °F 1971
5 57 °F 1901
5 57 °F 1990
5 57 °F 1896
5 57 °F 2006
5 57 °F 1959
What's the most it has ever rained in Waterloo on 9/18?
For the date of Sep 18, the most precipitation ever recorded in Waterloo history is 1.34 inches which happened in 2018.
All-Time Most Precipitation in Waterloo on September 18
Rank Precipitation Year
1 1.34 inches 2018
2 1.02 inches 1960
3 0.82 inches 2003
4 0.64 inches 1938
4 0.64 inches 1977
6 0.60 inches 1922
7 0.56 inches 1990
8 0.45 inches 2010
9 0.43 inches 2011
10 0.42 inches 2007
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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