As of 16:25 CDT

Waterloo, IA weather in December

81°

Waterloo, Saturday, 8 August, 16:25

Clear. Feels like 83°. High 81°, low 60°.

Pressure30.00 inHg

Wind2 mph S

Humidity59%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

In December, Waterloo, IA averages a high of 31.3° and a low of 17.4°. About 1.7 inches of precipitation fall over the month (7 wet days). The record high is 68.9° (2021) and the record low -28.1° (1983). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	36°	23.7°	28%	60.3° (1998)	-4° (1971)
2	36.9°	22.8°	20%	61.2° (1998)	-8° (1985)
3	35.4°	21.2°	27%	64.6° (2012)	-15.9° (1985)
4	34.9°	21.2°	18%	65.8° (1998)	-9.6° (1991)
5	35.2°	21.2°	22%	64.6° (2001)	-0.6° (2005)
6	32.5°	18.9°	25%	55.8° (1998)	-12.1° (1972)
7	31.1°	18°	22%	52.7° (2023)	-21.3° (1972)
8	31.8°	19.2°	28%	53.2° (2023)	-2.6° (2025)
9	32.4°	18.1°	27%	49.8° (2015)	-12.3° (1977)
10	31.5°	17.4°	18%	55.6° (1979)	-16.6° (1977)
11	30.9°	16.9°	25%	55.9° (1965)	-15.9° (1972)
12	31.6°	17.2°	15%	55.8° (1968)	-15.9° (2000)
13	32.4°	17.8°	25%	59.2° (2015)	-18.9° (2000)
14	32.9°	18.3°	27%	55.9° (1975)	-17.7° (1985)
15	32.4°	19°	28%	68.9° (2021)	-9.9° (1989)
16	31.6°	17.4°	20%	65.1° (2021)	-12.6° (1963)
17	29.1°	16°	17%	47.1° (1977)	-18.6° (1972)
18	29.8°	16.3°	17%	50.7° (1976)	-22.2° (1983)
19	29.7°	16.2°	15%	50.5° (1988)	-28.1° (1983)
20	29.8°	15.6°	28%	52.3° (1967)	-17.3° (1983)
21	29.1°	15.1°	18%	55.9° (1967)	-22.5° (1963)
22	29.5°	16°	25%	50.5° (2023)	-20.4° (1983)
23	29.1°	15.6°	28%	54.9° (1965)	-23.8° (1983)
24	27.5°	13.6°	33%	55.8° (2023)	-27.4° (1983)
25	28.2°	14°	18%	55.6° (2019)	-19.8° (2000)
26	28.9°	14.9°	25%	52.3° (2016)	-17.9° (1990)
27	30.9°	16°	30%	52.9° (2008)	-13.5° (1996)
28	31.8°	18.7°	35%	61.7° (1984)	-12.3° (1961)
29	29.8°	15.4°	22%	61.2° (1984)	-10.8° (1983)
30	29.1°	13.8°	25%	57.7° (1965)	-16.6° (2013)
31	27°	13.3°	18%	59.7° (1965)	-17.7° (1968)