Sioux City, IA

4 October 2026: 2026 so far averaged 56.1°F in Sioux City, IA, the warmest 1 January to 4 October since 2016, tied 8th warmest of 134 (with 2016).

Sunday 4 October 2026

High: 73°F; Warmest since 2025; 54th warmest of 138
Low: 44°F; Coldest since 2024; 55th coldest of 138

No measurable precipitation in Sioux City, IA for 3 days to Sunday 4 October 2026.

Every 4 October low in Sioux City, IA since 1889: 44°F in 2026; the lowest is 25°F, in 1935.

Normal range, 31 to 51.2°F

Every year as a table

Every 4 October high in Sioux City, IA since 1889: 73°F in 2026; the highest is 92°F, in 1938.

Year	High, °F	Low, °F
2026	73	44
2025	89	69
2024	76	44
2023	70	47
2022	76	51
2021	81	44
2020	64	31
2019	57	34
2018	47	35
2017	67	47
2016	67	54
2015	62	45
2014	53	32
2013	76	48
2012	55	30
2011	90	50
2010	69	34
2009	60	31
2008	75	47
2007	74	48
2006	63	44
2005	91	65
2004	58	34
2003	80	36
2002	59	36
2001	55	44
2000	54	43
1999	68	27
1998	62	51
1997	85	42
1996	72	43
1995	75	46
1994	59	53
1993	68	43
1992	77	50
1991	54	41
1990	78	40
1989	58	30
1988	51	31
1987	83	42
1986	62	45
1985	57	44
1984	74	50
1983	58	46
1982	78	48
1981	62	52
1980	64	31
1979	59	35
1978	64	33
1977	68	47
1976	64	50
1975	84	45
1974	77	50
1973	68	41
1972	77	45
1971	75	41
1970	82	41
1969	81	48
1968	65	27
1967	84	52
1966	63	38
1965	73	46
1964	59	38
1963	83	59
1962	73	45
1961	80	39
1960	80	52
1959	60	42
1958	82	50
1957	72	49
1956	74	46
1955	67	62
1954	58	44
1953	70	34
1952	54	36
1951	73	54
1950	56	28
1949	72	39
1948	71	46
1947	87	42
1946	74	54
1945	68	48
1944	62	50
1943	72	42
1942	64	42
1941	64	48
1940	79	51
1939	77	50
1938	92	58
1937	75	57
1936	66	59
1935	52	25
1934	78	57
1933	67	50
1932	46	37
1931	78	50
1930	72	61
1929	59	47
1928	75	49
1927	72	43
1926	64	53
1925	63	43
1924	76	44
1923	70	51
1922	88	64
1921	68	31
1920	79	45
1919	60	51
1918	76	63
1917	71	49
1916	79	49
1915	51	39
1914	67	49
1913	68	57
1912	78	50
1911	62	46
1910	75	48
1909	79	52
1908	76	52
1907	73	40
1906	60	47
1905	86	49
1904	82	51
1903	62	40
1902	59	40
1901	60	31
1900	83	58
1899	66	41
1898	53	43
1897	88	64
1896	71	44
1895	59	52
1894	53	37
1893	62	46
1892	84	42
1891	59	36
1890	68	43
1889	84	47

The forecast

Date	High	Low
6 October	85°FRecord 91°F, 1997, 1963	56°FRecord 22°F, 2000
7 October	Record 89°F, 1980	Record 15°F, 2012

The month and the year

Every year's 1 to 4 October in Sioux City, IA, ranked by its mean temperature: October 2026 so far is the 71st warmest of 138.

Every year, ranked, as a table

Rank	Year	Mean, °F
1	2005	75.5
2	1897	75.1
3	2025	74
4	1938	72.6
5	1922	72.1
6	2023	71.5
7	1900	70.8
8	1892	70.1
9	1951	68.9
10	1997	68.6
11	1967	68.4
12	2006	67.4
13	1963	67.3
14	1931	67
14	1916	67
16	1930	66.8
17	1992	66.1
18	1909	65.9
19	1905	65.5
20	1919	65.4
20	1914	65.4
22	2022	65
22	1969	65
24	1971	64.4
24	1913	64.4
26	2021	64.3
26	2013	64.3
26	1889	64.3
29	1976	64
29	1939	64
31	1956	63.9
32	1940	63.4
33	1972	63.3
33	1937	63.3
33	1910	63.3
36	1934	63.1
36	1904	63.1
38	1983	62.5
39	2016	62.4
39	1957	62.4
41	1955	62.3
42	1953	62.1
43	2011	61.9
43	1949	61.9
45	1924	61.5
46	1946	61.4
47	1982	61.1
47	1926	61.1
49	2017	60.6
50	1942	60.5
50	1917	60.5
52	2001	60.4
52	1947	60.4
52	1912	60.4
55	1990	60.3
55	1928	60.3
55	1903	60.3
58	2007	60.1
59	2024	60
59	1933	60
61	1932	59.9
61	1907	59.9
63	1970	59.8
63	1908	59.8
65	1936	59.6
65	1899	59.6
67	1973	59.4
67	1960	59.4
69	1958	59.3
70	1920	59.1
71	2026	58.9
72	1984	58.8
72	1896	58.8
74	1895	58.4
75	1994	58.1
76	1923	58
77	1964	57.9
78	2000	57.8
78	1941	57.8
78	1929	57.8
78	1906	57.8
78	1890	57.8
83	1948	57.5
84	1962	57.4
85	1995	57.1
86	1943	57
87	1918	56.8
88	1975	56.5
89	1991	56.4
89	1945	56.4
89	1911	56.4
89	1898	56.4
93	2008	56.3
94	1965	56.1
95	1978	55.4
96	1993	54.9
96	1986	54.9
96	1915	54.9
99	1987	54.8
100	1927	54.6
101	1954	54.4
101	1925	54.4
103	1996	54.3
103	1979	54.3
105	2012	54
106	1891	53.9
107	2015	53.6
107	1893	53.6
109	2018	53.5
110	1921	53.1
111	2002	53
112	2010	52.8
113	1966	52.6
114	1952	52.5
115	1977	52.4
115	1974	52.4
115	1961	52.4
118	1981	52.3
118	1968	52.3
120	2014	52
121	2003	51.5
122	1988	50.9
123	1998	50.8
124	1985	50.5
124	1944	50.5
126	1989	50.3
127	1902	50
128	1901	49.9
129	1980	49.8
129	1894	49.8
131	2004	49.6
132	2019	49.1
133	2009	48.5
134	1935	47.9
135	2020	46.9
136	1959	46.8
137	1950	44
138	1999	42.5

Every day as a table

Daily highs and lows in Sioux City, IA, 1 to 4 October 2026, with each date's record range and its 1991 to 2020 normal range.

Day	High, °F	Low, °F	Record high	Year	Record low	Year	Normal high	Normal low
1 October 2026	69	49	92	2023	25	2003	74	46
2 October 2026	70	41	94	1997	24	2004	67.5	46
3 October 2026	80	45	96	1938	28	1987	68.5	43
4 October 2026	73	44	92	1938	25	1935	65.5	43

The warmest, coldest and wettest on this date

The 20 warmest 4 October highs in Sioux City, IA since 1889.
Rank	Year	High, °F
1	1938	92
2	2005	91
3	2011	90
4	2025	89
5	1922	88
5	1897	88
7	1947	87
8	1905	86
9	1997	85
10	1975	84
10	1967	84
10	1892	84
10	1889	84
14	1987	83
14	1963	83
14	1900	83
17	1970	82
17	1958	82
17	1904	82
20	2021	81

The 20 coldest 4 October lows in Sioux City, IA since 1889.
Rank	Year	Low, °F
1	1935	25
2	1999	27
2	1968	27
4	1950	28
5	2012	30
5	1989	30
7	2020	31
7	2009	31
7	1988	31
7	1980	31
7	1921	31
7	1901	31
13	2014	32
14	1978	33
15	2019	34
15	2010	34
15	2004	34
15	1953	34
19	2018	35
19	1979	35

The 20 wettest 4 October days in Sioux City, IA since 1889.
Rank	Year	Precipitation, in
1	1946	1.78
2	1998	1.41
3	2005	1.34
4	1941	1.08
5	2016	0.75
6	1969	0.38
7	1936	0.37
8	1983	0.29
9	1929	0.27
10	2013	0.20
10	1991	0.20
12	2018	0.19
13	1942	0.17
13	1896	0.17
15	2001	0.14
15	1944	0.14
15	1908	0.14
18	2019	0.12
19	1985	0.08
19	1913	0.08

Every answer in words

Sunday 4 October 2026: a high of 73°F in Sioux City, IA, the warmest 4 October since 2025, tied 54th warmest of 138 (with 1965, 1962, 1951 and 1 other year).
Sunday 4 October 2026: a low of 44°F in Sioux City, IA, the coldest 4 October night since 2024, tied 55th coldest of 138 (with 2024, 2021, 2006 and 5 other years).
Forecast for Tuesday 6 October 2026: a high of 85°F in Sioux City, IA, which would be the warmest 6 October since 2007, 8th warmest of 138 (National Weather Service forecast).
Forecast for Tuesday 6 October 2026: a low of 56°F in Sioux City, IA, which would be the warmest 6 October night since 2007, tied 10th warmest of 138 (with 1984, 1931, 1907 and 1 other year) (National Weather Service forecast).
Sioux City, IA on 6 October: record high 91°F (1997 and 1963), record low 22°F (2000).
Sioux City, IA on 7 October: record high 89°F (1980), record low 15°F (2012).
October 2026 so far averaged 58.9°F in Sioux City, IA, the coldest 1 to 4 October since 2020, 68th coldest of 138.
October 2026 so far brought 0.01 in of precipitation in Sioux City, IA, the driest 1 to 4 October since 2025, tied 59th driest of 138 (with 1945, 1919, 1900 and 2 other years).
Fall 2026 so far averaged 67.7°F in Sioux City, IA, the warmest 1 September to 4 October since 2023, 14th warmest of 138.
Fall 2026 so far brought 3.50 in of precipitation in Sioux City, IA, the wettest 1 September to 4 October since 2023, tied 47th wettest of 138 (with 1995).
2026 so far brought 20.45 in of precipitation in Sioux City, IA, the driest 1 January to 4 October since 2022, 51st driest of 134.
The 30 days to Sunday 4 October 2026 brought 3.08 in of precipitation in Sioux City, IA, the driest 30 days to 4 October since 2025, 93rd driest of 138.
The 60 days to Sunday 4 October 2026 brought 7.25 in of precipitation in Sioux City, IA, the driest 60 days to 4 October since 2025, 103rd driest of 138.
The 90 days to Sunday 4 October 2026 brought 8.35 in of precipitation in Sioux City, IA, the driest 90 days to 4 October since 2024, 72nd driest of 138.
Sioux City, IA has had 35 days at 90°F or above in 2026 through 4 October, the most by that date since 2023, tied 37th most of 134 (with 1974).
Sioux City, IA has had 1 day at 100°F or above in 2026 through 4 October, the most by that date since 2023, tied 46th most of 134 (with 2018, 2013, 2001 and 17 other years).
Sioux City, IA has had 88 freezing nights (a low of 32°F or below) in 2026 through 4 October, the most by that date since 2025, tied 87th most of 134 (with 1976, 1968, 1966 and 2 other years).
The last freeze of spring 2026 in Sioux City, IA came on Wednesday 6 May 2026, the latest since 2022, tied 29th latest of 133 (with 1944 and 1906).

Nearby

Norfolk, NE 61.0 mi
Omaha, NE 78.6 mi
Spencer, IA 80.0 mi
Sioux Falls, SD 84.1 mi
Lincoln, NE 108.5 mi
Woodbury County, IA county average
Iowa every city and county

All-time records

About these figures

Daily records for Sioux City, IA run from 1889 to 4 October 2026, with 114 days missing; current station SIOUX CITY AP.

Our calculation from NOAA records for Sioux City, IA, 1889 to 2026. Preliminary until NOAA's final data.