Waterloo September 30 Weather Records

Daily averages and all-time records for weather in Waterloo, Iowa for the date of September 30.
September 30 All-Time Records
1895–2024
Highest temperature 94 °F 2023
Lowest temperature 19 °F 1899
Lowest daily high 46 °F 1945
Highest daily low 72 °F 2002
Most precipitation 1.69 inches 2007
Most snow none -
September 30 Average Weather
1991–2020 1
Average high 69.8 °F
Average low 45.3 °F
Chance precipitation 29.0%
Chance snow 0.1%
Waterloo September 30 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 94 67 0.00 0.0
2022 73 37 0.00 0.0
2021 88 60 0.00 0.0
2020 68 48 0.03 0.0
2019 91 67 0.00 0.0
2018 51 45 0.36 0.0
2017 70 39 0.00 0.0
2016 66 49 0.00 0.0
2015 65 39 0.00 0.0
2014 66 51 0.00 0.0
2013 76 50 0.00 0.0
2012 79 39 0.00 0.0
2011 66 40 0.00 0.0
2010 73 44 0.00 0.0
2009 64 38 0.00 0.0
2008 64 42 0.00 0.0
2007 80 59 1.69 0.0
2006 72 42 0.00 0.0
2005 76 45 0.00 0.0
2004 74 36 0.00 0.0
2003 60 28 0.00 0.0
2002 89 72 0.03 0.0
2001 74 36 0.00 0.0
2000 81 60 0.01 0.0
1999 74 39 0.00 0.0
1998 74 43 0.04 0.0
1997 75 47 0.00 0.0
1996 84 53 0.00 0.0
1995 77 57 0.29 0.0
1994 87 56 0.00 0.0
1993 69 35 0.00 0.0
1992 79 38 0.00 0.0
1991 68 39 0.00 0.0
1990 67 33 0.00 0.0
1989 77 39 0.00 0.0
1988 75 57 0.00 0.0
1987 67 42 0.00 0.0
1986 64 47 0.17 0.0
1985 47 39 0.00 0.0
1984 64 27 0.00 0.0
1983 80 52 0.00 0.0
1982 82 61 0.00 0.0
1981 82 51 0.00 0.0
1980 78 54 0.00 0.0
1979 78 50 0.00 0.0
1978 66 43 0.00 0.0
1977 63 48 1.12 0.0
1976 80 36 0.00 0.0
1975 59 46 0.00 0.0
1974 54 34 0.00 0.0
1973 62 55 0.00 0.0
1972 62 29 0.00 0.0
1971 86 66 0.00 0.0
1970 73 43 0.00 0.0
1969 72 40 0.00 0.0
1968 79 47 0.00 0.0
1967 76 31 0.00 0.0
1966 56 35 0.07 0.0
1965 68 46 1.49 0.0
1964 71 37 0.00 0.0
1963 77 38 0.00 0.0
1962 60 56 0.46 0.0
1961 63 38 1.24 0.0
1960 57 41 0.00 0.0
1959 53 42 0.00 0.0
1958 54 36 0.02 0.0
1957 81 45 0.00 0.0
1956 63 32 0.00 0.0
1955 61 43 0.00 0.0
1954 70 53 0.05 0.0
1953 77 42 0.00 0.0
1952 91 53 0.00 0.0
1951 76 50 0.00 0.0
1950 80 61 0.00 0.0
1949 69 30 0.00 0.0
1948 77 53 0.00 0.0
1947 52 33 0.00 0.0
1946 61 32 0.00 0.0
1945 46 34 0.01 0.0
1944 70 45 0.00 0.0
1943 75 61 n/a 0.0
1942 75 41 0.00 0.0
1941 58 43 n/a 0.0
1940 73 41 0.00 0.0
1939 54 30 0.00 0.0
1938 72 49 0.00 0.0
1937 85 60 0.00 0.0
1936 64 49 0.00 0.0
1935 71 51 0.00 0.0
1934 62 35 0.00 0.0
1933 76 63 0.00 0.0
1932 77 38 0.00 0.0
1931 70 55 n/a 0.0
1930 66 31 0.00 0.0
1929 64 38 0.00 0.0
1928 73 39 n/a 0.0
1927 65 50 0.54 0.0
1926 62 51 n/a 0.0
1925 73 61 n/a 0.0
1924 63 27 0.00 0.0
1923 75 57 0.03 0.0
1922 75 59 n/a 0.0
1921 71 39 0.00 0.0
1920 55 30 0.00 0.0
1919 59 50 1.00 0.0
1918 62 35 0.00 0.0
1917 64 40 0.00 0.0
1916 57 30 0.00 0.0
1915 58 49 0.05 0.0
1914 81 50 0.00 0.0
1913 63 54 0.60 0.0
1912 58 34 0.00 0.0
1911 65 41 n/a 0.0
1910 75 49 0.00 0.0
1909 71 41 0.00 0.0
1908 55 33 0.00 0.0
1907 59 46 0.07 0.0
1906 70 36 0.00 0.0
1905 75 58 n/a 0.0
1904 81 54 0.00 0.0
1903 75 48 n/a 0.0
1902 65 47 0.52 0.0
1901 75 51 0.06 0.0
1900 78 43 n/a 0.0
1899 57 19 0.00 0.0
1898 72 40 n/a 0.0
1897 92 51 0.00 0.0
1896 75 45 0.00 0.0
1895 55 29 0.00 0.0
What's the all-time high for Waterloo on 9/30?
For the date of Sep 30, the highest temperature ever reached in Waterloo history is 94 °F which happened in 2023.
Highest Temperatures in Waterloo on September 30
Rank Temperature Year
1 94 °F 2023
2 92 °F 1897
3 91 °F 1952
3 91 °F 2019
5 89 °F 2002
6 88 °F 2021
7 87 °F 1994
8 86 °F 1971
9 85 °F 1937
10 84 °F 1996
What's the all-time low for Waterloo on 9/30?
For the date of Sep 30, the lowest temperature ever reached in Waterloo history is 19 °F which happened in 1899.
Lowest Temperatures in Waterloo on September 30
Rank Temperature Year
1 19 °F 1899
2 27 °F 1984
2 27 °F 1924
4 28 °F 2003
5 29 °F 1895
5 29 °F 1972
7 30 °F 1920
7 30 °F 1939
7 30 °F 1949
7 30 °F 1916
Lowest High Temperatures in Waterloo on September 30
Rank Temperature Year
1 46 °F 1945
2 47 °F 1985
3 51 °F 2018
4 52 °F 1947
5 53 °F 1959
6 54 °F 1958
6 54 °F 1939
6 54 °F 1974
9 55 °F 1895
9 55 °F 1920
9 55 °F 1908
What's the most it has ever rained in Waterloo on 9/30?
For the date of Sep 30, the most precipitation ever recorded in Waterloo history is 1.69 inches which happened in 2007.
All-Time Most Precipitation in Waterloo on September 30
Rank Precipitation Year
1 1.69 inches 2007
2 1.49 inches 1965
3 1.24 inches 1961
4 1.12 inches 1977
5 1.00 inches 1919
6 0.60 inches 1913
7 0.54 inches 1927
8 0.52 inches 1902
9 0.46 inches 1962
10 0.36 inches 2018
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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