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Waterloo December Precipitation Totals

A time series of total precipitation in the month of December in Waterloo, Iowa from 1916–2023.

Rainiest December in Waterloo History

The rainiest December in Waterloo, Iowa history happened in 2015, with 5.92 inches of total precipitation.

Driest December in Waterloo History

There have been 2 times where no rain was recorded in Waterloo, Iowa for the entire month of December. The most recent time this happened was 1943.

Waterloo Average December Precipitation by Year

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Year	Precipitation (inches)
2023	0.85
2022	1.59
2021	1.32
2020	1.01
2019	0.92
2018	2.60
2017	0.46
2016	1.87
2015	5.92
2014	1.64
2013	0.94
2012	1.74
2011	2.38
2010	2.05
2009	3.19
2008	2.01
2007	1.92
2006	1.86
2005	1.12
2004	0.52
2003	0.47
2002	0.14
2001	0.70
2000	1.91
1999	0.43
1998	0.25
1997	0.78
1996	1.05
1995	0.16
1994	1.35
1993	0.76
1992	1.60
1991	1.54
1990	1.26
1989	0.22
1988	0.52
1987	1.82
1986	0.82
1985	1.25
1984	1.95
1983	1.03
1982	3.77
1981	0.83
1980	0.52
1979	0.71
1978	0.79
1977	1.73
1976	0.46
1975	0.40
1974	1.28
1973	2.26
1972	1.84
1971	1.78
1970	1.13
1969	1.95
1968	2.80
1967	0.83
1966	0.80
1965	2.12
1964	1.93
1963	0.52
1962	0.28
1961	1.29
1960	0.71
1959	1.78
1958	0.40
1957	0.68
1956	0.41
1955	0.46
1954	0.96
1953	1.06
1952	1.18
1951	1.35
1950	0.23
1949	0.54
1948	1.55
1943	0.00
1939	0.00
1929	0.43
1922	0.17
1921	0.13
1916	0.58

Its possible for precipitation totals to include both rain and melted snowfall
Months with more than 10% missing data are excluded