Number of Days of 100 °F in Waterloo by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 100 degrees Fahrenheit in Waterloo, Iowa, between 1895 and 2024.
Also see:
Which year had the most 100° days?
Based on NOAA records, the year 1936 holds the record for the most 100 °F days in Waterloo history. There were 20 days with a high temperature of at least 100 degrees that year.
How many so far this year (2024)?
It has not reached 100 degrees Fahrenheit in Waterloo so far in 2024. As of March 26, the highest temperature this year is 80 °F.
The last time it reached at least 100° F was September 4, 2023.
  • Years marked with a gold background have more than 5% incomplete data
  • Click column headers to sort
Year Rank Days >= 100 °F
2024 39 0
2023 10 4
2022 39 0
2021 26 1
2020 39 0
2019 39 0
2018 39 0
2017 39 0
2016 39 0
2015 39 0
2014 39 0
2013 39 0
2012 8 5
2011 39 0
2010 39 0
2009 39 0
2008 39 0
2007 39 0
2006 39 0
2005 39 0
2004 39 0
2003 39 0
2002 39 0
2001 39 0
2000 39 0
1999 39 0
1998 39 0
1997 39 0
1996 39 0
1995 26 1
1994 39 0
1993 39 0
1992 39 0
1991 39 0
1990 39 0
1989 18 2
1988 5 11
1987 26 1
1986 39 0
1985 26 1
1984 39 0
1983 18 2
1982 39 0
1981 39 0
1980 18 2
1979 39 0
1978 39 0
1977 26 1
1976 39 0
1975 39 0
1974 39 0
1973 39 0
1972 39 0
1971 39 0
1970 39 0
1969 39 0
1968 39 0
1967 39 0
1966 39 0
1965 39 0
1964 39 0
1963 39 0
1962 39 0
1961 39 0
1960 39 0
1959 39 0
1958 39 0
1957 26 1
1956 39 0
1955 14 3
1954 39 0
1953 39 0
1952 39 0
1951 39 0
1950 39 0
1949 39 0
1948 39 0
1947 39 0
1946 39 0
1945 39 0
1944 39 0
1943 39 0
1942 39 0
1941 39 0
1940 14 3
1939 10 4
1938 39 0
1937 18 2
1936 1 20
1935 26 1
1934 2 19
1933 18 2
1932 39 0
1931 5 11
1930 8 5
1929 39 0
1928 39 0
1927 26 1
1926 26 1
1925 10 4
1924 39 0
1923 7 6
1922 18 2
1921 14 3
1920 39 0
1919 26 1
1918 18 2
1917 10 4
1916 3 13
1915 39 0
1914 18 2
1913 26 1
1912 39 0
1911 14 3
1910 39 0
1909 39 0
1908 39 0
1907 39 0
1906 39 0
1905 39 0
1904 39 0
1903 39 0
1902 39 0
1901 3 13
1900 39 0
1899 39 0
1898 39 0
1897 26 1
1896 39 0
1895 26 1
Weather Station Details
Years Station Coordinates
1950–2024 Waterloo Municipal Airport location
1895–1950 Waterloo location