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Sioux City July Weather

Averages and records for weather in Sioux City, Iowa in the month of July.

Typical Sioux City July Weather 1991–2020
Average daily high	85.7 °F
Average daily low	63.7 °F
Average monthly precipitation	3.4 inches
Average monthly snow	none
Daily chance of precipitation	29.1%
Daily chance of snow	0%

Sioux City July Weather Records 1948–2024
Highest temperature	108 °F	July 12, 1995
Lowest temperature	42 °F	July 30, 1971
Highest daily low	80 °F	July 15, 1969
Lowest daily high	61 °F	July 7, 2023
Hottest average high temperature	94.0 °F	1974
Coldest average high temperature	78.1 °F	1992
Most daily precipitation	5.5 inches	July 17, 1972
Most monthly precipitation	10.3 inches	1972
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
July 1	84.8	62.6	99	44
July 2	84.9	62.6	98	48
July 3	85.1	62.8	104	47
July 4	85.2	63.0	100	46
July 5	85.3	63.2	99	47
July 6	85.4	63.3	100	49
July 7	85.5	63.4	106	51
July 8	85.6	63.5	100	49
July 9	85.6	63.6	102	48
July 10	85.7	63.7	99	45
July 11	85.7	63.8	105	50
July 12	85.7	63.8	108	51
July 13	85.7	63.8	105	49
July 14	85.7	63.8	104	50
July 15	85.7	63.8	96	51
July 16	85.7	63.8	98	49
July 17	85.8	63.8	102	51
July 18	85.8	63.8	103	50
July 19	85.8	63.8	103	49
July 20	85.8	63.8	102	50
July 21	85.7	63.7	101	48
July 22	85.6	63.7	104	53
July 23	85.5	63.6	103	50
July 24	85.4	63.6	100	53
July 25	85.4	63.6	99	47
July 26	85.4	63.5	102	48
July 27	85.4	63.5	101	47
July 28	85.2	63.4	98	44
July 29	85.1	63.3	101	48
July 30	85.0	63.2	104	42
July 31	84.9	63.0	107	49

Weather Station Details

Years	Station	Coordinates
1948–2024	Sioux City Gateway Airport	location