Waterloo, IA: 2025

31 December 2025: 2025 averaged 49.9°F in Waterloo, IA, the warmest year since 2024, 15th warmest of 131.

2025

Mean temperature: 49.9°F; Warmest since 2024; 15th warmest of 131
Precipitation: 35.46 in; Wettest since 2024; 46th wettest of 131

A normal year in Waterloo, IA (1991 to 2020): a mean temperature of 48°F, between 45.7°F and 49.7°F in eight years of ten and 35.10 in of precipitation, between 28.25 in and 43.43 in in eight years of ten.

The mean temperature of every year in Waterloo, IA since 1895: 49.9°F in 2025; the highest is 53.1°F, in 1931.

Normal range, 45.7 to 49.7°F

Every year, ranked, as a table

Every year in Waterloo, IA from 1895 to 2025, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2025	49.9	15	61	12	38.8	18	35.46	46	0
2024	52.4	2	63.5	2	41.2	2	40.95	16	0
2023	51.6	3	63.1	4	40.2	7	22.63	123	0
2022	47.7	62	58.7	50	36.8	69	34.04	55	0
2021	50.4	12	61.4	9	39.5	11	24.87	116	0
2020	49.7	16	60.3	22	39.2	13	35.84	41	0
2019	47.4	73	57.5	85	37.3	54	41.86	11	0
2018	46.8	90	56.7	103	36.8	69	54.15	1	0
2017	49	26	59.6	35	38.5	24	29.91	87	0
2016	50	14	59.8	29	40.2	7	41.78	12	0
2015	48.7	31	59.1	42	38.4	26	38.98	25	0
2014	44.5	126	54.9	125	34	125	34.90	51	0
2013	45.8	108	56.2	111	35.5	106	40.91	17	0
2012	51.4	5	63.2	3	39.7	10	24.07	119	0
2011	48.1	48	58.4	59	37.7	38	30.52	82	0
2010	47.6	64	58	69	37.2	58	43.05	9	0
2009	46.1	104	56.3	110	35.9	98	39.75	23	0
2008	45.1	119	55.5	119	34.8	113	45.95	6	0
2007	48	51	58.1	66	37.9	36	42.85	10	0
2006	49.4	22	60	26	38.9	17	33.57	59	0
2005	48.3	42	59	45	37.7	38	30.69	80	0
2004	48	51	58.8	47	37.3	54	28.34	102	0
2003	48.1	48	59.7	32	36.4	82	26.92	108	0
2002	49.3	24	60.4	21	38.2	29	27.44	106	0
2001	48.5	37	58.7	50	38.2	29	32.22	67	0
2000	48	51	58.6	55	37.4	48	32.17	69	0
1999	49.4	22	60.2	24	38.6	23	38.45	29	0
1998	50.5	10	60.2	24	40.9	3	40.12	22	0
1997	46.4	99	56.2	111	36.7	76	31.58	74	0
1996	45	122	55.4	121	34.7	118	29.91	87	0
1995	47.5	67	57.7	75	37.3	54	29.51	94	0
1994	47.3	75	58	69	36.6	79	35.30	48	0
1993	46.6	96	55.8	115	37.4	48	53.07	2	0
1992	47.5	67	57.7	75	37.4	48	30.97	78	0
1991	47.9	55	58.1	66	37.7	38	43.15	8	0
1990	48.8	30	59.5	38	38.1	32	41.50	14	0
1989	46	106	57.2	90	34.8	113	19.62	129	0
1988	47.8	58	60	26	35.7	102	18.99	130	0
1987	50.5	10	61	12	40	9	32.15	70	0
1986	47.3	75	57.2	90	37.4	48	36.70	34	0
1985	45.5	115	55.9	114	35	110	30.18	84	0
1984	47	83	57.1	95	36.8	69	34.45	54	0
1983	47.4	73	56.6	106	38.2	29	36.53	36	0
1982	45.8	108	55.5	119	36.1	91	35.06	50	0
1981	47.5	67	58.3	62	36.8	69	29.63	91	0
1980	46.9	88	57.5	85	36.2	87	31.73	73	0
1979	45.4	116	55.3	122	35.5	106	38.12	30	0
1978	44.3	128	54.7	126	33.9	126	35.36	47	0
1977	45.7	113	56.4	107	34.9	112	33.96	56	0
1976	45.4	116	57.7	75	33.2	129	22.32	124	0
1975	46.8	90	57	97	36.6	79	24.09	118	0
1974	46.6	96	56.4	107	36.7	76	29.60	93	0
1973	48.4	39	57.6	83	39.2	13	38.46	28	0
1972	43.7	129	53.4	131	33.9	126	35.59	43	0
1971	44.7	125	55	124	34.4	121	29.36	96	0
1970	45	122	55.3	122	34.8	113	30.05	85	0
1969	44.4	127	54.4	128	34.4	121	34.52	53	0
1968	46.2	102	56.7	103	35.6	104	44.62	7	0
1967	45	122	55.8	115	34.2	124	28.68	99	0
1966	46	106	57.2	90	34.8	113	40.65	18	0
1965	45.3	118	55.7	117	35	110	50.79	3	0
1964	47.3	75	58.7	50	35.9	98	35.93	40	0
1963	46.8	90	57.8	73	35.8	101	32.65	63	0
1962	45.8	108	55.6	118	36	94	31.89	72	0
1961	46.7	94	56.7	103	36.7	76	47.36	5	0
1960	45.8	108	56.4	107	35.2	109	36.65	35	0
1959	47	83	56.9	99	37	64	38.85	26	0
1958	46.4	99	57	97	35.7	102	25.63	111	1
1957	47.2	78	56.9	99	37.5	46	27.82	104	0
1956	47.2	78	58.2	64	36.2	87	22.81	122	0
1955	48	51	58.8	47	37.1	62	20.53	128	0
1954	49.7	16	59.8	29	39.5	11	31.42	76	3
1953	49.5	19	60.7	15	38.5	24	25.25	114	2
1952	48.7	31	59.7	32	37.7	38	25.53	113	3
1951	45.1	119	54.5	127	35.3	108	39.45	24	31
1950	43	130	53.7	130	32.4	130	20.63	126	31
1949	48.3	42	59.1	42	37.6	43	21.55	125	0
1948	48.4	39	59.1	42	37.7	38	32.19	68	0
1947	48.2	45	57.7	75	38.7	20	40.14	21	0
1946	49.5	19	60.3	22	38.7	20	38.57	27	0
1945	47	83	57.1	95	36.9	66	33.85	57	0
1944	48.6	35	58.4	59	38.7	20	34.76	52	0
1943	46.9	88	57.7	75	36.2	87	31.58	74	0
1942	47.8	58	58.3	62	37.4	48	40.32	19	0
1941	50.6	7	60.7	15	40.5	4	35.71	42	0
1940	47.5	67	57.7	75	37.2	58	35.58	44	0
1939	50.7	6	62.3	6	39.1	16	20.59	127	0
1938	50.6	7	61	12	40.3	6	41.13	15	0
1937	46.8	90	57.6	83	36.1	91	28.71	98	0
1936	47.6	64	58.9	46	36.4	82	28.31	103	0
1935	47.9	55	57.7	75	38	33	32.78	62	0
1934	50.6	7	62.1	7	39.2	13	29.62	92	0
1933	50.1	13	61.5	8	38.8	18	27.64	105	0
1932	47.8	58	58.6	55	37	64	33.69	58	0
1931	53.1	1	64	1	42.2	1	32.42	65	0
1930	49.2	25	61.1	11	37.3	54	29.87	89	0
1929	45.6	114	56.8	101	34.5	119	24.99	115	0
1928	48.9	27	59.7	32	38	33	41.76	13	0
1927	48.6	35	59.6	35	37.5	46	29.97	86	0
1926	47.8	58	58.5	58	37.1	62	28.68	99	0
1925	48.4	39	60.7	15	36.2	87	26.50	110	0
1924	46.1	104	57.3	89	34.8	113	36.01	39	0
1923	48.9	27	60.5	20	37.4	48	33.31	60	0
1922	49.7	16	61.4	9	38	33	30.63	81	0
1921	51.6	3	62.8	5	40.4	5	31.35	77	0
1920	47.6	64	58.4	59	36.8	69	33.03	61	0
1919	47.9	55	58.6	55	37.2	58	36.36	38	0
1918	47.5	67	58.8	47	36.1	91	32.40	66	0
1917	43	130	54.2	129	31.8	131	26.71	109	0
1916	46.2	102	57.8	73	34.5	119	23.75	120	0
1915	46.4	99	56.8	101	36	94	40.17	20	0
1914	48.1	48	59.6	35	36.5	81	35.55	45	0
1913	48.9	27	59.5	38	38.3	27	29.16	97	0
1912	45.1	119	56.1	113	33.7	128	30.32	83	3
1911	48.7	31	59.4	41	37.6	43	37.22	33	6
1910	48.2	45	60	26	36.3	85	17.35	131	0
1909	47.1	81	57.4	88	36.8	69	32.56	64	0
1908	49.5	19	60.6	19	38.3	27	32.13	71	0
1907	47.5	67	57.9	72	37.2	58	30.85	79	0
1906	48.2	45	58.7	50	37.6	43	28.54	101	0
1905	47	83	58	69	36	94	36.41	37	0
1904	45.8	108	57.2	90	34.4	121	25.57	112	0
1903	46.7	94	57.2	90	36.3	85	35.20	49	0
1902	47.2	78	57.5	85	36.9	66	49.76	4	0
1901	48.3	42	59.8	29	36.9	66	23.53	121	0
1900	48.7	31	59.5	38	37.8	37	37.35	32	0
1899	47	83	58.1	66	35.9	98	29.85	90	0
1898	47.1	81	58.2	64	36	94	29.44	95	0
1897	46.6	96	57.7	75	35.6	104	26.95	107	0
1896	47.7	62	58.7	50	36.8	69	37.60	31	0
1895	48.5	37	60.7	15	36.4	82	24.53	117	20

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1931	53.1
2024	52.4
2023	51.6
1921	51.6
2012	51.4
1939	50.7
1941	50.6
1938	50.6
1934	50.6
1998	50.5
More years share the last value

Coldest
Year	Mean, °F
1950	43
1917	43
1972	43.7
1978	44.3
1969	44.4
2014	44.5
1971	44.7
1996	45
1970	45
1967	45

Wettest
Year	Precipitation, in
2018	54.15
1993	53.07
1965	50.79
1902	49.76
1961	47.36
2008	45.95
1968	44.62
1991	43.15
2010	43.05
2007	42.85

Driest
Year	Precipitation, in
1910	17.35
1988	18.99
1989	19.62
1955	20.53
1939	20.59
1950	20.63
1949	21.55
1976	22.32
2023	22.63
1956	22.81

The hottest, coldest and wettest days

Hottest day: 96°F; 11 June 2025
Coldest night: -17°F; 18 February 2025
Wettest day: 2.52 in; 11 July 2025

Month by month

Month	Mean temperature	Precipitation
January	20.2°F 45th warmest of 129	0.10 in 3rd driest of 130
February	21.1°F 61st coldest of 131	0.44 in 31st driest of 131
March	44.1°F 5th warmest of 130	2.38 in 44th wettest of 130
April	50.1°F 38th warmest of 130	5.75 in 8th wettest of 131
May	60.9°F 45th warmest of 131	2.37 in 31st driest of 131
June	72.9°F 14th warmest of 130	6.54 in 29th wettest of 130
July	74.7°F 46th warmest of 131	9.99 in 7th wettest of 131
August	70.7°F 50th coldest of 131	3.09 in 60th driest of 131
September	67.2°F 12th warmest of 131	0.89 in 11th driest of 131
October	56.2°F 13th warmest of 131	1.35 in 31st driest of 131
November	38.4°F 43rd warmest of 130	1.98 in 46th wettest of 131
December	20.9°F 48th coldest of 131	0.58 in 29th driest of 131

Hot days and freezes

Waterloo, IA has had 15 days at 90°F or above in 2025 through 31 December, the most by that date since 2024, tied 82nd most of 131 (with 2019, 1996, 1984 and 4 other years).
Waterloo, IA has had 140 freezing nights (a low of 32°F or below) in 2025 through 31 December, the most by that date since 2023, tied 116th most of 131 (with 1913).
The first freeze of fall 2025 in Waterloo, IA came on Thursday 23 October 2025, the earliest since 2024, tied 126th earliest of 131 (with 1938 and 1910).
The last freeze of spring 2025 in Waterloo, IA came on Wednesday 16 April 2025, the latest since 2024, tied 122nd latest of 129 (with 2007 and 1952).

Daily records set

Date	Record	Value	Before	Check
4 December	Coldest night	-15°F	-7°F 1991	Provisional
14 November	Warmest day	73°F	72°F 1964	Provisional
26 September	Warmest day	89°F	88°F 2021, 1998	Provisional
28 March	Warmest day	85°F	81°F 1986, 1910	Provisional
14 March	Warmest day	81°F	77°F 2012	Provisional
10 March	Warmest day	76°F	69°F 2021	Provisional
30 January	Warmest day	62°F	55°F 1924	Provisional
28 January	Warmest day	56°F	53°F 1914	Provisional

Daily records set and not listed: 0

Every month, season and year

Months

Seasons

Years

2025
2026

Waterloo, IA the day's answers

All-time records

Every answer in words

2025 brought 35.46 in of precipitation in Waterloo, IA, the wettest year since 2024, 46th wettest of 131.
The hottest day of 2025 in Waterloo, IA: 96°F on Wednesday 11 June 2025.
The coldest night of 2025 in Waterloo, IA: a low of -17°F on Tuesday 18 February 2025.
The wettest day of 2025 in Waterloo, IA: 2.52 in on Friday 11 July 2025.