Sioux Falls, SD Climate

Summary Graph

The summary climate graph for Sioux Falls, SD shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Sioux Falls, SD.


The warmest month in Sioux Falls, South Dakota is July with an average high temperature of 87.0°F. The hottest day on record was June 22 1988 when the temperature hit 109.9°F. During January the overnight temperature drops to an average of 6.7°F with the lowest temperature of -31.0°F being recorded on January 1 1974.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

22 Jun 1988109.9°F
10 Jul 1989108°F
26 Aug 1973107.1°F
1 Aug 1988107.1°F
12 Jul 1995107.1°F

The warmest months on average were:

July 201296°F
July 197494.8°F
July 197593.8°F
June 198893.1°F
July 197692.8°F

The coldest days on record are:

1 Jan 1974-31°F
2 Jan 2010-29.9°F
7 Jan 1988-29°F
11 Feb 1988-29°F
9 Feb 1994-29°F

The coldest months on average were:

January 1977-8.4°F
January 1978-8.1°F
January 1979-7.6°F
December 1983-7.2°F
January 1982-5.9°F


The wettest month by average rainfall in Sioux Falls, SD is June with an average of 3.5 inches of rain falling on 12 to 13 days.Although in May it typically rains on more days with 3.4 inches falling in 13 to 14 days. The driest month by average rainfall in Sioux Falls, SD is December with an average of 0.6 inches of rain falling on 3 to 4 days. Although in January it typically rains on less days with 1.0 inches falling in 2 to 3 days

Wettest Days

The wettest days on record are:

10 September 19822.7 inches
30 September 19772.6 inches
19 September 19862.5 inches
10 September 20032.3 inches
25 September 20052.1 inches

Wettest Months

The wettest months on record are:

January 197316.7 inches
April 197313.3 inches
May 197312.7 inches
July 201010.8 inches
March 197310.8 inches

Driest Months

The driest months on record are:

December 19450 inches
December 19420 inches
January 19430 inches
February 19430 inches
March 19430 inches