Weather By Day

August Sioux City Weather 
August Sioux City Weather
Record High: 104°F
Normal High: 84°F
Normal Low: 61°F
Record Low: 37°F
Avg Monthly Rain: 2.9"
Rec 1 Day Rain: 4.28"

Sioux City Weather In August

The hottest August day in Sioux City for the past 70 years was 104 degrees Fahrenheit, registered on August 3, 1955, while the mean high temperature is 84. The lowest reported temperature in August for Sioux City for the past 70 years was 37 most recently registered on August 2, 1950, and the mean daily low in the month is 61.

US National Weather Service historical Sioux City August Weather data records that on August 24, 1987, the high temperature did not exceed 58 degrees Fahrenheit, the lowest high measured in Sioux City in the past 70 years. Weather Service records additionally indicate that on August 2, 1964, the low for the day was not measured below 80 degrees, the highest low temperature recorded in Sioux City in the last 70 years.

National Weather Service data shows that the high temperature in Sioux City on August First averages 86 degrees Fahrenheit and the high on the final day of August averages 81 degrees. The average daily low temperature in Sioux City on August First is 63 degrees Fahrenheit and the average low on the last day of August is 59 degrees.

Sioux City typically receives an average of 2.9 inches of precipitation during the month. The most precipitation measured in a single day, as indicated by August Sioux City Weather data, was 4.28 inches on August 21, 1961.