Weather By Day

May Sioux City Weather 
May Sioux City Weather
Record High: 102°F
Normal High: 73°F
Normal Low: 49°F
Record Low: 25°F
Avg Monthly Rain: 3.75"
Rec 1 Day Rain: 2.19"
Avg Monthly Snow: 0.1"
Rec 1 Day Snow: 6.8"

Sioux City Weather In May

In the last 70 years the highest measured May temperature in Sioux City was 102 degrees Fahrenheit, registered on May 25, 1967, and the standard high is 73. In the last 70 years the lowest measured May temperature in Sioux City was 25 most recently encountered on May 20, 1997, and the standard low recorded daily temperature is 49.

US National Weather Service historical Sioux City May Weather data records that on May 3, 1954, the high temperature did not exceed 41 degrees Fahrenheit, the lowest high measured in Sioux City in the past 70 years. Weather Service records also indicate that on May 28, 2006, the low temperature for the day was not measured below 74 degrees, the highest low measured in Sioux City in the last 70 years.

NWS data indicates that the daily high temperature in Sioux City on May First averages 66 degrees Fahrenheit and the high on the last day of May averages 76 degrees. The low measured temperature in Sioux City on May First averages 42 degrees and the low on the last day of the month averages 54 degrees.

Sioux City typically receives an average of 3.75 inches of rain during the month. The most precipitation recorded on a single day in May, according to May Sioux City Weather data, was 2.19 inches on May 1, 1972. Sioux City receives an average of 0.1 inches of snow in May. The most snow recorded in a single day in May was 6.8 inches on May 4, 1957.