Waterloo December 21 Weather Records

Daily averages and all-time records for weather in Waterloo, Iowa for the date of December 21.
December 21 All-Time Records
1895–2024
Highest temperature 56 °F 1941
Lowest temperature -27 °F 1963
Lowest daily high -11 °F 1989
Highest daily low 43 °F 1918
Most precipitation 0.83 inches 1984
Most snow 4.0 inches 1983
December 21 Average Weather
1991–2020 1
Average high 31.0 °F
Average low 14.4 °F
Chance precipitation 27.9%
Chance snow 19.4%
Waterloo December 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 41 34 0.00 0.0
2022 18 -4 0.21 2.2
2021 37 12 0.00 0.0
2020 45 25 0.00 0.0
2019 50 17 0.00 0.0
2018 32 25 0.00 0.0
2017 35 27 0.00 0.0
2016 40 15 0.00 0.0
2015 42 32 0.00 0.0
2014 39 32 0.00 0.0
2013 26 21 0.01 0.1
2012 21 4 0.00 0.0
2011 43 29 0.00 0.0
2010 33 15 0.00 0.0
2009 23 19 0.12 1.3
2008 0 -9 0.00 0.0
2007 35 32 0.00 0.0
2006 40 36 0.35 0.0
2005 15 -10 0.00 0.0
2004 33 1 0.00 0.0
2003 43 31 0.00 0.0
2002 34 27 0.00 0.0
2001 42 14 0.00 0.0
2000 3 -7 0.00 0.0
1999 7 -15 0.01 0.3
1998 10 2 0.00 0.0
1997 31 15 0.00 0.0
1996 37 22 0.00 0.0
1995 25 15 0.00 0.0
1994 40 33 0.00 0.0
1993 31 17 0.02 0.2
1992 37 16 0.00 0.0
1991 35 22 0.00 0.0
1990 0 -8 0.00 0.2
1989 -11 -21 0.00 0.0
1988 35 14 0.00 0.0
1987 36 20 0.00 0.0
1986 34 6 0.00 0.0
1985 22 -21 0.00 0.0
1984 33 22 0.83 1.0
1983 14 -10 0.15 4.0
1982 39 19 0.00 0.0
1981 34 29 0.00 0.0
1980 20 10 0.00 0.0
1979 47 23 0.00 0.0
1978 34 12 0.00 0.0
1977 18 13 0.00 0.0
1976 15 -8 0.00 0.0
1975 31 6 0.00 0.0
1974 23 10 0.00 0.0
1973 16 -9 0.00 0.0
1972 33 22 0.00 0.0
1971 33 17 0.00 0.0
1970 24 10 0.10 1.0
1969 25 12 0.16 1.5
1968 29 16 0.10 1.0
1967 52 10 0.02 0.4
1966 34 13 0.00 0.0
1965 44 16 0.00 0.0
1964 34 10 0.00 0.0
1963 -6 -27 0.00 0.0
1962 30 20 0.00 0.0
1961 30 20 0.00 0.0
1960 2 -11 0.00 0.0
1959 34 16 0.00 0.0
1958 23 12 0.00 0.0
1957 48 28 0.00 0.0
1956 34 26 0.00 0.0
1955 22 0 0.00 0.0
1954 31 25 0.00 0.0
1953 39 29 0.25 0.0
1952 31 19 0.00 n/a
1951 21 -3 0.16 2.0
1950 34 7 0.00 0.0
1949 24 12 0.00 0.0
1948 39 22 0.00 0.0
1947 40 17 0.00 0.0
1946 33 24 n/a n/a
1945 12 -2 0.00 0.0
1944 23 -5 0.00 0.0
1943 33 15 0.00 0.0
1942 27 12 n/a n/a
1941 56 32 0.00 0.0
1940 42 14 0.00 0.0
1939 27 13 0.00 0.0
1938 29 20 n/a n/a
1937 39 16 0.00 0.0
1936 33 21 0.00 0.0
1935 16 2 n/a n/a
1934 28 20 0.00 0.0
1933 44 15 0.00 0.0
1932 40 22 n/a 0.0
1931 43 35 0.03 0.0
1930 27 12 0.00 0.0
1929 16 2 0.00 0.0
1928 15 0 0.05 0.5
1927 38 4 0.00 0.0
1926 33 24 0.00 0.0
1925 22 9 0.00 0.0
1924 6 -13 n/a n/a
1923 46 39 0.02 0.0
1922 39 6 0.00 0.0
1921 9 -2 0.00 0.0
1920 31 23 n/a n/a
1919 31 21 0.00 0.0
1918 52 43 0.00 0.0
1917 49 23 0.00 0.0
1916 4 -17 0.00 0.0
1915 24 -3 0.00 0.0
1914 17 -2 n/a n/a
1913 28 11 0.00 0.0
1912 22 20 0.00 0.0
1911 34 21 0.30 2.0
1910 26 6 0.00 n/a
1909 12 0 n/a n/a
1908 40 10 0.00 0.0
1907 35 16 n/a 0.0
1906 32 18 0.00 0.0
1905 34 29 n/a n/a
1904 30 -2 0.00 0.0
1903 43 22 0.00 0.0
1902 35 32 0.00 0.0
1901 22 4 0.00 0.0
1900 46 29 0.00 0.0
1899 37 17 0.00 0.0
1898 36 30 0.00 0.0
1897 13 -7 0.00 0.0
1896 21 9 0.00 0.0
1895 33 30 0.00 0.0
What's the all-time high for Waterloo on 12/21?
For the date of Dec 21, the highest temperature ever reached in Waterloo history is 56 °F which happened in 1941.
Highest Temperatures in Waterloo on December 21
Rank Temperature Year
1 56 °F 1941
2 52 °F 1918
2 52 °F 1967
4 50 °F 2019
5 49 °F 1917
6 48 °F 1957
7 47 °F 1979
8 46 °F 1900
8 46 °F 1923
10 45 °F 2020
What's the all-time low for Waterloo on 12/21?
For the date of Dec 21, the lowest temperature ever reached in Waterloo history is -27 °F which happened in 1963.
Lowest Temperatures in Waterloo on December 21
Rank Temperature Year
1 -27 °F 1963
2 -21 °F 1985
2 -21 °F 1989
4 -17 °F 1916
5 -15 °F 1999
6 -13 °F 1924
7 -11 °F 1960
8 -10 °F 2005
8 -10 °F 1983
10 -9 °F 1973
10 -9 °F 2008
Lowest High Temperatures in Waterloo on December 21
Rank Temperature Year
1 -11 °F 1989
2 -6 °F 1963
3 0 °F 1990
3 0 °F 2008
5 2 °F 1960
6 3 °F 2000
7 4 °F 1916
8 6 °F 1924
9 7 °F 1999
10 9 °F 1921
What's the most it has ever rained in Waterloo on 12/21?
For the date of Dec 21, the most precipitation ever recorded in Waterloo history is 0.83 inches which happened in 1984.
All-Time Most Precipitation in Waterloo on December 21
Rank Precipitation Year
1 0.83 inches 1984
2 0.35 inches 2006
3 0.30 inches 1911
4 0.25 inches 1953
5 0.21 inches 2022
6 0.16 inches 1951
6 0.16 inches 1969
8 0.15 inches 1983
9 0.12 inches 2009
10 0.10 inches 1970
10 0.10 inches 1968
All-Time Most Snow in Waterloo on December 21
Rank Precipitation Year
1 4.0 inches 1983
2 2.2 inches 2022
3 2.0 inches 1951
3 2.0 inches 1911
5 1.5 inches 1969
6 1.3 inches 2009
7 1.0 inches 1968
7 1.0 inches 1970
7 1.0 inches 1984
10 0.5 inches 1928
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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