Sioux City, IA: records

4 October 2026: The hottest day on record in Sioux City, IA: 111°F on Tuesday 11 July 1939, Friday 17 July 1936 and Saturday 4 July 1936.

The record begins: 1889

All-time records

Hottest day: 111°F; 11 July 1939, 17 July 1936, 4 July 1936
Coldest night: -35°F; 12 January 1912
Wettest day: 5.50 in; 17 July 1972
Warmest night: 86°F; 18 August 1936
Coldest day: -22°F; 8 February 1899

Daily records by decade

New daily records set in Sioux City, IA by decade since the 1910s: the most record highs, 183, came in the 1930s; the most record lows, 66, in the 1920s.

Record highs
Record lows

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1880s	0	0	1
1890s	0	0	10
1900s	0	0	10
1910s	11	11	10
1920s	89	66	10
1930s	183	45	10
1940s	60	64	10
1950s	57	51	10
1960s	41	43	10
1970s	28	41	10
1980s	49	35	10
1990s	30	39	10
2000s	37	27	10
2010s	41	28	10
2020s	34	19	7

Records by month

Month	Highest	Lowest	Wettest day
January	71°F 26 January 2002	-35°F 12 January 1912	1.26 in 22 January 2018
February	77°F 26 February 2024	-31°F 11 February 1899	2.15 in 18 February 1971
March	95°F 21 March 2026	-22°F 5 March 1960	2.25 in 31 March 2007
April	98°F 28 April 1910	-2°F 3 April 1975	2.49 in 14 April 2012
May	106°F 14 May 2013	23°F 1 May 1909	3.38 in 17 May 1892
June	108°F 21 June 1988	38°F 4 June 1945	5.10 in 3 June 1940
July	111°F 11 July 1939, 17 July 1936, 4 July 1936	41°F 9 July 1895	5.50 in 17 July 1972
August	108°F 24 August 1936, 4 August 1934	37°F 20 August 1950	4.51 in 18 August 1937
September	103°F 2 September 2000, 6 September 1939, 17 September 1895	24°F 29 September 1945	4.65 in 9 September 1914
October	96°F 3 October 1938	5°F 29 October 1925	4.42 in 30 October 1979
November	82°F 8 November 2006	-9°F 7 November 1991, 14 November 1959, 21 November 1937 and 2 more	3.23 in 19 November 1948
December	71°F 6 December 1939	-28°F 29 December 1917	1.38 in 28 December 2019

Streaks, months and years

Longest heat streak	27 days	2 July to 28 July 1936	A high of 90°F or above
Longest cold streak	52 days	29 December 1978 to 18 February 1979	A high of 32°F or below
Wettest month	16.65 in	June 2014
Driest month	a trace	October 1958	and 1 more
Wettest year	41.36 in	2014
Driest year	14.33 in	1976

Every record in words

The coldest night on record in Sioux City, IA: a low of -35°F on Friday 12 January 1912.
The wettest day on record in Sioux City, IA: 5.50 in on Monday 17 July 1972.
The warmest night on record in Sioux City, IA: a low of 86°F on Tuesday 18 August 1936.
The coldest day on record in Sioux City, IA: a high of -22°F on Wednesday 8 February 1899.
The longest run of days with a high of 90°F or above in Sioux City, IA: 27 days, from Thursday 2 July to Tuesday 28 July 1936.
The longest run of days with a high of 32°F or below in Sioux City, IA: 52 days, from Friday 29 December 1978 to Sunday 18 February 1979.
The wettest month on record in Sioux City, IA: June 2014, with 16.65 in of precipitation.
The driest month on record in Sioux City, IA: October 1958, with a trace of precipitation (shared with 1 other month).
The wettest year on record in Sioux City, IA: 2014, with 41.36 in of precipitation.
The driest year on record in Sioux City, IA: 1976, with 14.33 in of precipitation.

Sioux City, IA the day's answers