Sioux City, IA: Summer

31 August 2026: Summer 2026 averaged 74°F in Sioux City, IA, the warmest summer since 2022, tied 43rd warmest of 135 (with 1995, 1947 and 1943).

Summer 2026

Mean temperature: 74°F; Warmest since 2022; 43rd warmest of 135
Precipitation: 8.58 in; Driest since 2023; 52nd driest of 136

A normal summer in Sioux City, IA (1991 to 2020): a mean temperature of 72.5°F, between 70.6°F and 75.3°F in eight years of ten and 10.65 in of precipitation, between 6.69 in and 16.51 in in eight years of ten.

The mean temperature of every summer in Sioux City, IA since 1890: 74°F in 2026; the highest is 80.2°F, in 1936.

Normal range, 70.6 to 75.3°F

Every year, ranked, as a table

Every summer in Sioux City, IA from 1889 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	74	43	85.2	46	62.8	39	8.58	85	0
2025	73.3	62	83.9	66	62.6	47	15.27	15	0
2024	72.4	85	83.6	77	61.1	97	13.15	29	0
2023	73.7	49	86.3	24	61.1	97	7.22	110	0
2022	74.6	29	87.6	9	61.7	74	5.79	127	0
2021	74.3	34	86.8	17	61.7	74	6.78	121	0
2020	75.3	14	87.3	14	63.3	30	7.03	112	0
2019	72.2	91	82.8	93	61.6	80	10.84	52	0
2018	72.9	70	83.4	80	62.4	51	15.46	14	0
2017	73.2	64	85.5	38	60.8	104	10.72	53	0
2016	75.3	14	86.5	19	64	19	8.62	83	0
2015	72	97	82.5	102	61.4	87	15.84	11	0
2014	71.5	107	81.7	114	61.2	95	30.38	1	0
2013	72.2	91	83.1	87	61.2	95	6.80	120	0
2012	75.3	14	88.5	5	62.2	58	4.65	133	0
2011	74.9	23	85.5	38	64.4	14	8.34	89	0
2010	74.3	34	85.2	46	63.4	29	20.13	2	0
2009	70.1	124	81.3	120	58.9	130	14.33	20	0
2008	71.9	99	83.7	73	60.1	116	10.41	62	0
2007	74.3	34	85.4	43	63.3	30	13.96	23	0
2006	74.2	37	86.4	22	62	64	10.57	58	0
2005	75.4	12	87.1	16	63.7	24	8.09	95	0
2004	69	133	80.3	128	57.7	132	8.02	98	0
2003	72.5	80	84.5	57	60.5	110	9.43	75	0
2002	74.6	29	85.8	31	63.5	26	13.52	26	0
2001	72.6	78	83.9	66	61.4	87	8.15	94	0
2000	71.9	99	83	90	60.9	103	10.58	57	0
1999	72.4	85	82.9	91	61.9	67	15.77	12	0
1998	71.6	105	81.8	111	61.4	87	10.71	54	0
1997	72.2	91	83.9	66	60.4	112	5.66	128	0
1996	70.7	120	81.8	111	59.7	125	16.41	8	0
1995	74	43	85.8	31	62.3	55	5.55	129	0
1994	71.1	114	81.5	118	60.6	108	11.30	48	0
1993	71.1	114	81	122	61.3	93	17.37	3	0
1992	67.8	134	78.1	134	57.5	133	12.15	38	0
1991	74.1	40	85.1	49	63.2	34	8.21	92	0
1990	73.4	59	84.2	62	62.7	42	8.76	82	0
1989	73.2	64	84.7	55	61.7	74	9.60	71	0
1988	76.3	5	89.1	2	63.5	26	8.62	83	0
1987	73.7	49	84.8	53	62.7	42	10.11	65	0
1986	72.7	75	83.4	80	62.1	62	10.47	61	0
1985	70.6	121	82	107	59.1	129	5.25	132	0
1984	73	68	83.4	80	62.6	47	10.14	64	0
1983	75.5	10	85.8	31	65.1	6	7.01	114	0
1982	71.4	109	81.7	114	61.1	97	6.99	115	0
1981	72.5	80	83.1	87	61.9	67	9.15	77	0
1980	74.4	33	85.9	29	62.8	39	7.39	106	0
1979	72.3	89	82.8	93	61.7	74	11.58	44	0
1978	72	97	83.4	80	60.7	105	9.00	80	0
1977	72.1	95	82.8	93	61.3	93	13.67	25	0
1976	73.6	54	86.5	19	60.6	108	2.55	136	0
1975	73.7	49	84.1	64	63.3	30	11.51	46	0
1974	73.9	47	85.5	38	62.4	51	7.84	100	0
1973	74.8	25	85.6	37	63.9	20	9.49	73	0
1972	73	68	83.3	84	62.6	47	16.21	10	0
1971	73.8	48	85.5	38	62.2	58	5.34	131	0
1970	74.1	40	86	27	62.3	55	5.53	130	0
1969	71.6	105	82.2	105	61.1	97	16.54	7	0
1968	73.7	49	85.3	44	62	64	7.05	111	0
1967	70.8	119	81.6	117	59.9	120	12.15	38	0
1966	72.9	70	83.1	87	62.7	42	12.90	30	0
1965	72.2	91	82.7	96	61.7	74	6.02	125	0
1964	72.4	85	82.9	91	61.9	67	14.06	22	0
1963	74.6	29	84.4	60	64.8	10	12.48	34	0
1962	71.9	99	81.9	110	61.9	67	16.39	9	0
1961	72.9	70	83.8	70	62	64	14.75	18	0
1960	72.7	75	83.7	73	61.6	80	10.65	56	0
1959	75.3	14	86.6	18	63.9	20	8.18	93	0
1958	71.2	113	82.6	100	59.9	120	8.03	97	0
1957	74.7	27	85.8	31	63.5	26	15.04	16	0
1956	75.3	14	87.7	7	62.9	37	10.20	63	0
1955	76.7	4	88.6	4	64.7	11	7.02	113	0
1954	75	21	85.7	36	64.3	17	9.72	70	0
1953	75	21	87.5	11	62.5	50	8.22	91	0
1952	73.6	54	85.8	31	61.4	87	10.55	59	0
1951	70	125	80.6	124	59.5	127	14.74	19	0
1950	69.1	132	80.9	123	57.3	135	13.34	27	0
1949	74.2	37	86.3	24	62.2	58	12.29	37	0
1948	73.3	62	85.2	46	61.5	83	11.43	47	0
1947	74	43	86.4	22	61.7	74	6.88	117	0
1946	71.8	103	83.5	78	60.1	116	7.68	102	0
1945	69.8	127	80.6	124	58.9	130	11.86	41	0
1944	72.4	85	83.3	84	61.4	87	12.67	31	0
1943	74	43	85.1	49	62.8	39	11.01	50	0
1942	73.2	64	84.5	57	61.8	71	8.05	96	0
1941	73.6	54	84.8	53	62.4	51	9.99	66	0
1940	72.9	70	84.3	61	61.5	83	17.37	3	0
1939	74.8	25	86.2	26	63.3	30	8.42	88	0
1938	76.1	9	87.7	7	64.6	12	9.88	67	0
1937	76.3	5	87.3	14	65.4	4	13.81	24	0
1936	80.2	1	92.8	1	67.7	1	3.88	135	0
1935	75.4	12	85.9	29	64.9	8	6.18	124	0
1934	76.9	2	88.7	3	65.2	5	12.32	35	0
1933	76.3	5	87.5	11	65.1	6	6.84	118	0
1932	74.9	23	84.9	52	64.9	8	10.50	60	0
1931	76.8	3	87.6	9	66	2	8.54	86	0
1930	75.3	14	86	27	64.6	12	7.28	108	0
1929	72.5	80	82.6	100	62.3	55	13.29	28	0
1928	71.4	109	81.4	119	61.5	83	9.57	72	0
1927	70	125	80.3	128	59.8	124	7.23	109	0
1926	73.2	64	84	65	62.4	51	7.45	104	0
1925	73.5	58	84.2	62	62.7	42	7.50	103	0
1924	70.3	122	80.4	127	60.3	113	12.53	32	0
1923	72.8	74	82	107	63.6	25	15.70	13	0
1922	73.4	59	83.7	73	63.1	36	10.92	51	0
1921	75.5	10	85.3	44	65.7	3	7.33	107	0
1920	71.9	99	81.7	114	62.1	62	11.25	49	0
1919	74.1	40	83.8	70	64.4	14	12.13	40	0
1918	74.2	37	84.6	56	63.8	22	8.99	81	0
1917	71.4	109	82.3	103	60.5	110	7.42	105	0
1916	73.4	59	83.9	66	62.9	37	8.54	86	0
1915	67	135	76.5	135	57.5	133	14.89	17	0
1914	74.7	27	85.5	38	63.8	22	6.81	119	0
1913	75.3	14	86.5	19	64.2	18	4.55	134	0
1912	71	117	81.3	120	60.7	105	14.20	21	0
1911	73.7	49	85.1	49	62.2	58	6.54	122	0
1910	71.5	107	82.2	105	60.7	105	7.86	99	0
1909	72.6	78	82	107	63.2	34	12.31	36	0
1908	69.7	128	79.4	130	60.1	116	11.68	42	0
1907							11.52	45	30
1906	70.2	123	80.5	126	59.9	120	9.13	78	0
1905	71.7	104	81.8	111	61.5	83	5.80	126	0
1904	69.4	130	79	131	59.9	120	11.63	43	0
1903	69.2	131	78.5	133	60	119	16.89	5	0
1902	69.6	129	78.9	132	60.3	113	9.44	74	0
1901	76.3	5	88.1	6	64.4	14	7.69	101	0
1900	73.6	54	84.5	57	62.7	42	16.60	6	0
1899	72.7	75	83.7	73	61.8	71	10.67	55	0
1898	72.3	89	83.5	78	61.1	97	12.49	33	0
1897	71	117	82.7	96	59.2	128	6.90	116	0
1896	71.3	112	82.3	103	60.3	113	9.34	76	0
1895	71.1	114	82.7	96	59.6	126	9.12	79	0
1894	74.6	29	87.4	13	61.8	71	6.23	123	0
1893	72.5	80	83.8	70	61.1	97	9.77	69	0
1892	72.1	95	82.7	96	61.4	87	8.27	90	0
1891									30
1890	72.5	80	83.3	84	61.6	80	9.84	68	0
1889									30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1936	80.2
1934	76.9
1931	76.8
1955	76.7
1988	76.3
1937	76.3
1933	76.3
1901	76.3
1938	76.1
1983	75.5
More years share the last value

Coldest
Year	Mean, °F
1915	67
1992	67.8
2004	69
1950	69.1
1903	69.2
1904	69.4
1902	69.6
1908	69.7
1945	69.8
1951	70
More years share the last value

Wettest
Year	Precipitation, in
2014	30.38
2010	20.13
1993	17.37
1940	17.37
1903	16.89
1900	16.60
1969	16.54
1996	16.41
1962	16.39
1972	16.21

Driest
Year	Precipitation, in
1976	2.55
1936	3.88
1913	4.55
2012	4.65
1985	5.25
1971	5.34
1970	5.53
1995	5.55
1997	5.66
2022	5.79

The hottest, coldest and wettest days

Hottest day: 101°F; 20 July 2026
Coldest night: 43°F; 15 June 2026
Wettest day: 1.72 in; 13 August 2026

Every month, season and year

Months

Seasons

Years

Sioux City, IA the day's answers

All-time records

Every answer in words

Summer 2026 brought 8.58 in of precipitation in Sioux City, IA, the driest summer since 2023, 52nd driest of 136.
The hottest day of summer 2026 in Sioux City, IA: 101°F on Monday 20 July 2026.
The coldest night of summer 2026 in Sioux City, IA: a low of 43°F on Monday 15 June 2026.
The wettest day of summer 2026 in Sioux City, IA: 1.72 in on Thursday 13 August 2026.