Waterloo, IA: Fall

9 October 2026: Fall 2026 so far averaged 65.4°F in Waterloo, IA, the warmest 1 September to 9 October since 2025, tied 12th warmest of 132 (with 1938 and 1905).

Fall 2026 so far, to 9 October 2026

Mean temperature: 65.4°F; Warmest since 2025; 12th warmest of 132
Precipitation: 11.01 in; Wettest since 2018; 5th wettest of 132

A normal 1 September to 9 October in Waterloo, IA (1991 to 2020): a mean temperature of 60.8°F, between 58.9°F and 64.9°F in eight years of ten and 3.43 in of precipitation, between 2.08 in and 6.55 in in eight years of ten.

The mean temperature of every 1 September to 9 October in Waterloo, IA since 1895: 65.4°F in 2026; the highest is 68.9°F, in 1931.

Normal range, 58.9 to 64.9°F

Every year, ranked, as a table

Every 1 September to 9 October in Waterloo, IA from 1895 to 2026, 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
2026	65.4	12	74.8	48	56.1	3	11.01	5	0
2025	66.9	6	80.1	6	53.7	10	1.20	125	0
2024	66.5	8	81.7	2	51.3	37	0.45	131	0
2023	67.8	3	81	4	54.6	6	1.97	113	0
2022	63	45	75.7	37	50.3	57	1.39	123	0
2021	67.3	4	79.8	7	54.8	5	2.17	108	0
2020	60.4	84	72.4	83	48.5	83	5.17	38	0
2019	66.7	7	76.7	28	56.8	2	9.12	10	0
2018	61.9	57	71.4	96	52.4	24	18.65	1	0
2017	65.2	15	78.3	12	52	28	3.35	75	0
2016	64.9	18	76	34	53.9	9	7.37	18	0
2015	65.1	17	76.8	26	53.4	13	2.59	95	0
2014	59.1	105	70.8	106	47.3	97	2.35	104	0
2013	64.6	22	77.3	20	51.8	31	2.41	103	0
2012	58.6	112	73.3	69	43.8	130	2.09	110	0
2011	59.6	98	72.1	86	47.1	102	2.66	91	0
2010	61	72	74.2	56	47.9	87	2.43	102	0
2009	59.4	100	70.6	111	48.2	85	3.93	59	0
2008	61.5	64	73.2	70	49.7	66	3.23	78	0
2007	64.9	18	77.1	23	52.8	18	6.46	24	0
2006	59.7	96	71.6	91	47.9	87	5.44	36	0
2005	64.4	25	77.2	21	51.6	34	3.39	73	0
2004	63.5	39	77.6	17	49.4	72	1.69	120	0
2003	60	93	74.2	56	45.8	118	1.98	112	0
2002	63.6	37	76.9	25	50.3	57	2.47	100	0
2001	59	107	71	103	47	104	4.71	43	0
2000	60.3	87	73.2	70	47.3	97	2.15	109	0
1999	58.9	109	73.1	75	44.7	126	1.18	126	0
1998	63.2	44	75.6	39	50.8	44	3.47	71	0
1997	64.2	28	76.7	28	51.8	31	4.67	45	0
1996	60.1	90	72.3	84	47.9	87	3.99	58	0
1995	58.9	109	71.5	92	46.3	114	3.60	70	0
1994	64	29	75.1	42	53	17	4.29	54	0
1993	57.8	124	68.8	128	46.7	107	4.32	51	0
1992	60.5	80	73.5	67	47.5	95	2.53	97	0
1991	58.1	118	69.9	117	46.2	116	4.71	43	0
1990	62.7	48	74.2	56	51.2	38	2.27	106	0
1989	56.9	129	69.7	118	44.1	128	3.73	63	0
1988	60.5	80	74.7	51	46.3	114	1.65	121	0
1987	59.1	105	71.4	96	46.7	107	1.84	117	0
1986	61.4	66	71.2	102	51.6	34	5.67	32	0
1985	59.7	96	69.3	123	50.2	59	5.75	30	0
1984	59.9	94	72.6	81	47.3	97	2.09	110	0
1983	61.7	62	73.9	62	49.5	70	3.71	64	0
1982	61.1	69	71.8	88	50.5	50	2.31	105	0
1981	57.4	126	69.6	120	45.3	122	3.45	72	0
1980	60.6	78	72.9	78	48.2	85	3.75	62	0
1979	62.7	48	75	45	50.4	54	1.46	122	0
1978	63.4	42	74.8	48	51.9	29	8.78	11	0
1977	57.4	126	67	130	47.8	92	7.05	20	0
1976	58.6	112	73.7	65	43.5	131	1.80	118	0
1975	56.5	130	69.1	126	43.9	129	0.80	128	0
1974	55.9	132	68.8	128	42.9	132	3.20	79	0
1973	61.5	64	70	115	53.1	16	7.01	22	0
1972	59.5	99	70.7	107	48.3	84	5.66	33	0
1971	61.8	58	74	60	49.6	68	2.68	90	0
1970	60.6	78	71.7	89	49.5	70	7.74	15	0
1969	60.8	74	72.8	79	48.8	77	1.91	116	0
1968	57.9	121	69.2	125	46.7	107	6.23	26	0
1967	57.5	125	70.4	113	44.6	127	3.04	81	0
1966	60.2	88	73.2	70	47.2	100	0.55	130	0
1965	57.3	128	66.7	132	47.8	92	11.44	4	0
1964	58	120	69.5	121	46.6	111	5.45	35	0
1963	64	29	77.2	21	50.9	42	2.52	99	0
1962	58.5	115	69	127	47.9	87	4.18	56	0
1961	60.8	74	71.3	99	50.4	54	8.13	13	0
1960	62.2	54	73.6	66	50.8	44	5.06	40	0
1959	60.8	74	70.7	107	50.8	44	5.68	31	0
1958	61.1	69	72.8	79	49.4	72	4.85	42	0
1957	58.6	112	70	115	47.2	100	1.39	123	0
1956	58.9	109	72.5	82	45.3	122	2.47	100	0
1955	63.7	32	76.7	28	50.8	44	3.25	77	0
1954	63.5	39	73.4	68	53.5	11	4.23	55	0
1953	62.5	52	78.1	13	46.9	105	0.42	132	0
1952	61.4	66	76.8	26	46.1	117	0.61	129	1
1951	59	107	69.7	118	48.7	78	3.71	64	1
1950	61.1	69	73.1	75	49.1	74	4.97	41	0
1949	59.3	102	71.5	92	47.1	102	4.43	47	0
1948	63.4	42	75.7	37	51.2	38	3.36	74	0
1947	65.9	10	76.5	32	55.4	4	2.91	85	0
1946	62.1	56	73.8	63	50.4	54	6.23	26	0
1945	59.2	103	69.4	122	49	75	3.62	69	0
1944	61.7	62	70.6	111	52.7	20	3.67	66	0
1943	58.2	116	70.7	107	45.7	119	2.84	87	0
1942	60.5	80	71.3	99	49.7	66	6.03	28	0
1941	63.7	32	75.3	41	52.2	27	13.28	2	0
1940	62.8	47	75.5	40	50.1	61	5.11	39	0
1939	67.2	5	81.1	3	53.4	13	1.94	115	0
1938	65.4	12	77.6	17	53.3	15	7.52	17	0
1937	63.7	32	76.6	31	50.7	48	2.99	83	0
1936	64.3	26	74.5	53	54.2	7	8.59	12	0
1935	59.4	100	71.4	96	47.5	95	2.88	86	0
1934	60.2	88	71.7	89	48.7	78	6.44	25	0
1933	65.2	15	78	15	52.4	24	2.75	89	0
1932	59.9	94	73.2	70	46.6	111	2.93	84	0
1931	68.9	1	80.3	5	57.5	1	9.62	9	0
1930	64.3	26	77.5	19	51.1	40	3.64	68	0
1929	60.4	84	72.2	85	48.7	78	3.66	67	0
1928	60.4	84	74.1	59	46.7	107	3.32	76	0
1927	63.7	32	74.8	48	52.6	22	7.78	14	0
1926	62.2	54	72	87	52.4	24	10.74	6	0
1925	64.8	20	76.2	33	53.5	11	7.55	16	0
1924	58.2	116	71	103	45.4	121	2.60	94	0
1923	61.8	58	73.8	63	49.8	64	7.33	19	0
1922	65.8	11	79.7	8	51.9	29	4.34	50	0
1921	63.6	37	77	24	50.2	59	7.02	21	0
1920	64.6	22	79.1	9	50.1	61	1.71	119	0
1919	66.4	9	78.7	10	54.1	8	10.10	7	0
1918	57.9	121	71	103	44.8	125	2.21	107	0
1917	57.9	121	70.2	114	45.6	120	4.17	57	0
1916	61.3	68	74.7	51	47.9	87	3.20	79	0
1915	60.1	90	71.5	92	48.7	78	9.83	8	0
1914	63.7	32	75.8	36	51.7	33	12.89	3	0
1913	62.7	48	74.9	46	50.5	50	5.52	34	0
1912	60.1	90	71.3	99	48.9	76	6.88	23	0
1911	60.7	77	71.5	92	49.9	63	4.37	49	0
1910	61.8	58	74	60	49.6	68	3.00	82	0
1909	62.4	53	74.9	46	49.8	64	2.53	97	0
1908	64.5	24	78.6	11	50.5	50	1.96	114	0
1907	61.8	58	73	77	50.5	50	4.41	48	0
1906	64.8	20	78	15	51.5	36	2.55	96	0
1905	65.4	12	78.1	13	52.7	20	3.77	61	0
1904	62.7	48	74.5	53	51	41	2.66	91	0
1903	59.2	103	70.7	107	47.7	94	4.30	53	0
1902	58.1	118	69.3	123	46.9	105	5.23	37	0
1901	60.9	73	73.2	70	48.7	78	3.79	60	0
1900	63.9	31	75.1	42	52.6	22	5.84	29	0
1899	60.5	80	74.5	53	46.6	111	0.84	127	0
1898	63.5	39	76	34	50.9	42	2.62	93	0
1897	68.1	2	83.5	1	52.8	18	2.77	88	0
1896	56.1	131	67	130	45.2	124	4.47	46	0
1895	62.9	46	75.1	42	50.7	48	4.32	51	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1931	68.9
1897	68.1
2023	67.8
2021	67.3
1939	67.2
2025	66.9
2019	66.7
2024	66.5
1919	66.4
1947	65.9

Coldest
Year	Mean, °F
1974	55.9
1896	56.1
1975	56.5
1989	56.9
1965	57.3
1981	57.4
1977	57.4
1967	57.5
1993	57.8
1968	57.9
More years share the last value

Wettest
Year	Precipitation, in
2018	18.65
1941	13.28
1914	12.89
1965	11.44
2026	11.01
1926	10.74
1919	10.10
1915	9.83
1931	9.62
2019	9.12

Driest
Year	Precipitation, in
1953	0.42
2024	0.45
1966	0.55
1952	0.61
1975	0.80
1899	0.84
1999	1.18
2025	1.20
2022	1.39
1957	1.39

The hottest, coldest and wettest days

Hottest day: 92°F; 1 September 2026
Coldest night: 40°F; 5 October 2026
Wettest day: 2.91 in; 1 October 2026

Every month, season and year

Months

Seasons

Years

Waterloo, IA the day's answers

All-time records

Every answer in words

Fall 2026 so far brought 11.01 in of precipitation in Waterloo, IA, the wettest 1 September to 9 October since 2018, 5th wettest of 132.
The hottest day of fall 2026 so far in Waterloo, IA: 92°F on Tuesday 1 September 2026.
The coldest night of fall 2026 so far in Waterloo, IA: a low of 40°F on Monday 5 October 2026.
The wettest day of fall 2026 so far in Waterloo, IA: 2.91 in on Thursday 1 October 2026.