Sioux City, IA: May

31 May 2026: May 2026 averaged 62.2°F in Sioux City, IA, the warmest May since 2023, tied 44th warmest of 137 (with 1974).

May 2026

Mean temperature: 62.2°F; Warmest since 2023; 44th warmest of 137
Precipitation: 2.95 in; Driest since 2025; 56th driest of 137

A normal May in Sioux City, IA (1991 to 2020): a mean temperature of 60.8°F, between 57.4°F and 65.2°F in eight years of ten and 3.75 in of precipitation, between 1.37 in and 6.20 in in eight years of ten.

The mean temperature of every May in Sioux City, IA since 1890: 62.2°F in 2026; the highest is 72.5°F, in 1934.

Normal range, 57.4 to 65.2°F

Every year, ranked, as a table

Every May in Sioux City, IA from 1890 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
2026	62.2	44	76.8	20	47.5	96	2.95	82
2025	60	77	73.9	45	46	117	1.91	116
2024	61.4	55	74.6	36	48.2	82	5.75	19
2023	64.8	20	78.1	11	51.5	36	4.40	42
2022	61.2	58	72.7	60	49.7	64	2.18	108
2021	59.2	92	70.3	91	48.1	87	2.77	87
2020	58.2	107	68	120	48.5	78	2.56	95
2019	56.8	123	67.2	124	46.4	112	6.27	9
2018	66.5	7	78.4	9	54.7	8	3.71	61
2017	59.6	82	72.3	67	47	102	3.44	68
2016	60.9	62	73.9	45	48	90	5.02	31
2015	60.4	71	70.9	84	49.8	59	3.53	66
2014	62.6	39	75.9	25	49.2	70	2.03	111
2013	59.4	87	70.6	89	48.3	81	5.28	23
2012	65.7	10	79.3	4	52.1	32	6.20	12
2011	60.1	76	72	69	48.2	82	6.67	7
2010	60.7	65	73.9	45	47.4	98	1.41	129
2009	62.1	46	75.5	29	48.8	74	1.00	133
2008	58.5	103	70.8	85	46.1	113	5.20	27
2007	65.7	10	77.7	13	53.7	17	4.74	36
2006	63.3	33	76.2	24	50.5	50	0.87	135
2005	61.2	58	74.4	41	48	90	3.39	69
2004	61.3	56	73.1	52	49.6	66	4.32	44
2003	58	110	70.2	92	45.8	119	3.79	60
2002	57.9	113	71.4	76	44.3	132	2.60	94
2001	61.6	52	72.9	58	50.3	53	5.87	17
2000	64.3	26	77.7	13	51	44	3.91	54
1999	61.3	56	72.4	66	50.3	53	5.21	26
1998	65.1	17	77.3	17	53	25	2.87	85
1997	55.4	131	68.4	114	42.5	136	3.71	61
1996	57.4	117	66	131	48.7	75	6.22	11
1995	56.9	121	67.1	125	46.7	109	4.81	34
1994	63.8	32	76.8	20	50.7	46	0.88	134
1993	59.1	93	70	93	48.2	82	3.06	79
1992	60.7	65	73	55	48.5	78	3.56	65
1991	65	18	74.5	37	55.5	6	3.87	57
1990	58.2	107	69.3	107	47.2	100	7.48	5
1989	61	61	74.5	37	47.6	95	1.51	127
1988	67.5	4	80.5	3	54.4	10	2.47	101
1987	66.4	8	78.5	8	54.3	11	4.20	48
1986	61.8	50	73	55	50.6	48	3.00	81
1985	64.5	22	75.5	29	53.5	18	3.24	72
1984	57.7	115	68.1	117	47.4	98	5.54	21
1983	56.5	126	67.6	123	45.4	122	4.41	41
1982	62.4	40	71.2	81	53.5	18	6.93	6
1981	59.1	93	71.4	76	46.9	105	1.98	114
1980	61.2	58	74.1	43	48.2	82	3.88	56
1979	57.6	116	69.5	101	45.6	121	4.43	40
1978	60	77	71.4	76	48.6	76	3.39	69
1977	67.3	6	77.9	12	56.6	2	3.08	78
1976	58.5	103	71.9	71	45.2	125	3.12	76
1975	64.5	22	77	18	52.1	32	2.66	93
1974	62.2	44	72.8	59	51.6	35	4.16	50
1973	60.2	73	72.5	63	47.9	93	1.72	122
1972	62.7	38	73.1	52	52.3	31	4.29	46
1971	59.5	83	71	83	48.1	87	2.85	86
1970	65.4	15	77.5	16	53.3	21	3.04	80
1969	61.8	50	73.2	50	50.3	53	2.49	99
1968	57.4	117	69.5	101	45.4	122	2.34	103
1967	56.4	127	66.8	127	46	117	4.21	47
1966	58.6	100	72	69	45.3	124	1.15	132
1965	65.2	16	76.5	22	53.9	15	5.78	18
1964	65.7	10	77	18	54.3	11	3.19	74
1963	62.1	46	73.1	52	51.2	42	2.91	83
1962	67.7	3	78.8	5	56.5	3	5.64	20
1961	59	97	69.9	95	48	90	5.11	29
1960	60.7	65	72.5	63	49	72	3.89	55
1959	61.5	54	71.6	73	51.5	36	8.46	3
1958	64.5	22	77.7	13	51.4	38	1.77	120
1957	59.4	87	69.6	100	49.2	70	2.88	84
1956	63	35	74.7	35	51.2	42	1.99	112
1955	65.6	14	78.8	5	52.4	29	0.60	136
1954	56.6	124	68.1	117	45.1	127	2.51	97
1953	59.8	80	71.4	76	48.1	87	2.31	104
1952	60	77	71.5	75	48.6	76	4.99	32
1951	61.6	52	73.2	50	50	57	4.10	51
1950	58	110	70	93	46.1	113	3.22	73
1949	64.1	27	75.4	31	52.8	27	4.20	48
1948	60.4	71	72.6	62	48.2	82	1.79	119
1947	55.6	130	68.2	116	43	134	3.35	71
1946	56.6	124	68.1	117	45.1	127	5.96	15
1945	54.5	134	65.9	132	43.1	133	6.23	10
1944	64.6	21	75.7	27	53.5	18	4.77	35
1943	57.3	119	69.4	105	45.2	125	3.66	63
1942	58.4	105	69.7	98	47	102	1.62	123
1941	66.3	9	78.6	7	54.1	13	1.97	115
1940	59.7	81	73	55	46.5	111	1.55	124
1939	68.9	2	81.5	2	56.4	5	2.50	98
1938	59.5	83	68.5	113	50.6	48	5.20	27
1937	63.9	31	74.5	37	53.3	21	2.70	92
1936	67.4	5	78.2	10	56.5	3	4.35	43
1935	55	132	63.1	136	46.8	106	2.75	89
1934	72.5	1	86	1	59.1	1	0.60	136
1933	60.5	70	70.5	90	50.4	52	1.51	127
1932	63.3	33	74.3	42	52.4	29	2.71	90
1931	58.3	106	69.9	95	46.8	106	2.71	90
1930	59.5	83	69.3	107	49.8	59	5.88	16
1929	58.6	100	69.4	105	47.9	93	1.73	121
1928	63	35	74.5	37	51.4	38	5.36	22
1927	58.2	107	66.7	129	49.8	59	5.27	24
1926	65.7	10	76.4	23	54.9	7	4.83	33
1925	59.1	93	70.7	87	47.5	96	2.19	107
1924	53.8	135	64.6	134	43	134	1.52	126
1923	59.3	91	69	110	49.5	67	3.81	59
1922	62.8	37	71.6	73	53.9	15	2.23	106
1921	62.4	40	71.8	72	53	25	3.96	53
1920	60.2	73	69.5	101	51	44	3.82	58
1919	59.4	87	69	110	49.8	59	2.52	96
1918	65	18	75.9	25	54	14	5.22	25
1917	55.9	129	67.1	125	44.7	129	4.32	44
1916	60.7	65	72.5	63	49	72	4.58	39
1915	56.3	128	66.1	130	46.6	110	5.05	30
1914	62.1	46	72.7	60	51.4	38	3.47	67
1913	58.8	99	68	120	49.5	67	4.71	37
1912	62.4	40	73.5	48	51.3	41	2.76	88
1911	64.1	27	74.9	33	53.2	23	1.54	125
1910	54.9	133	65.1	133	44.6	130	1.99	112
1909	58	110	69.1	109	46.8	106	3.98	52
1908	58.6	100	68.7	112	48.4	80	6.19	13
1907	52.6	136	63.5	135	41.7	137	2.48	100
1906	60.6	69	71.1	82	50	57	2.18	108
1905	56.9	121	66.8	127	47	102	8.41	4
1904	60.2	73	70.7	87	49.7	64	3.09	77
1903	60.8	63	69.7	98	51.8	34	11.78	1
1902	64	30	74.8	34	53.2	23	1.27	130
1901	60.8	63	71.4	76	50.1	56	3.65	64
1900	64.1	27	75.6	28	52.5	28	1.87	118
1899	59.4	87	69.5	101	49.3	69	6.18	14
1898	59.5	83	68.3	115	50.7	46	4.69	38
1897	59.1	93	72.1	68	46.1	113	1.24	131
1896	64.4	25	74.1	43	54.6	9	6.39	8
1895	62	49	73.4	49	50.5	50	2.15	110
1894	62.4	40	75	32	49.8	59	1.91	116
1893	57	120	67.9	122	46.1	113	3.17	75
1892	52.5	137	60.3	137	44.6	130	8.56	2
1891	58.9	98	70.8	85	47.1	101	2.41	102
1890	57.8	114	69.9	95	45.7	120	2.29	105

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1934	72.5
1939	68.9
1962	67.7
1988	67.5
1936	67.4
1977	67.3
2018	66.5
1987	66.4
1941	66.3
2012	65.7
More years share the last value

Coldest
Year	Mean, °F
1892	52.5
1907	52.6
1924	53.8
1945	54.5
1910	54.9
1935	55
1997	55.4
1947	55.6
1917	55.9
1915	56.3

Wettest
Year	Precipitation, in
1903	11.78
1892	8.56
1959	8.46
1905	8.41
1990	7.48
1982	6.93
2011	6.67
1896	6.39
2019	6.27
1945	6.23

Driest
Year	Precipitation, in
1955	0.60
1934	0.60
2006	0.87
1994	0.88
2009	1.00
1966	1.15
1897	1.24
1902	1.27
2010	1.41
1989	1.51
More years share the last value

The hottest, coldest and wettest days

Hottest day: 95°F; 25 May 2026, 15 May 2026
Coldest night: 27°F; 2 May 2026
Wettest day: 1.48 in; 22 May 2026

Every month, season and year

Months

Seasons

Years

Sioux City, IA the day's answers

All-time records

Every answer in words

May 2026 brought 2.95 in of precipitation in Sioux City, IA, the driest May since 2025, 56th driest of 137.
The hottest day of May 2026 in Sioux City, IA: 95°F on Monday 25 May 2026 and Friday 15 May 2026.
The coldest night of May 2026 in Sioux City, IA: a low of 27°F on Saturday 2 May 2026.
The wettest day of May 2026 in Sioux City, IA: 1.48 in on Friday 22 May 2026.