Minnehaha County · South Dakota
Sioux Falls, SD weather averages
NOAA climate normals for 1991-2020, measured at Sioux Falls, 11.1 km from the city centre — month by month temperature, rain and snow.
Quick answer
Sioux Falls averages a daily high of 56.6°F and a daily low of 34.9°F across the year, with 26.38 inches of precipitation. July is the warmest month at 84.1°F and January the coldest at 6.9°F.
- Average annual high
- 56.6°FWarmest month July
- Average annual low
- 34.9°FColdest month January
- Precipitation per year
- 26.38 inWettest month June
- Snowfall per year
- 44.5 in164.3 days at or below 32°F
Sioux Falls weather month by month
Normal daily high and low, precipitation and snowfall for each month, 1991-2020.
| Month | High °F | Low °F | Precip in | Snow in | Range |
|---|---|---|---|---|---|
| January | 26.4 | 6.9 | 0.56 | 7.7 | 6.9 to 26.4 degrees |
| February | 31.3 | 11.7 | 0.6 | 6.9 | 11.7 to 31.3 degrees |
| March | 43.1 | 22.7 | 1.76 | 8.4 | 22.7 to 43.1 degrees |
| April | 58.5 | 34.4 | 3.01 | 4.6 | 34.4 to 58.5 degrees |
| May | 69.8 | 46.2 | 3.4 | 0 | 46.2 to 69.8 degrees |
| June | 79.2 | 56.4 | 3.92 | 0 | 56.4 to 79.2 degrees |
| July | 84.1 | 61.9 | 3.09 | 0 | 61.9 to 84.1 degrees |
| August | 81.7 | 59.6 | 3.05 | 0 | 59.6 to 81.7 degrees |
| September | 73.2 | 49.3 | 2.77 | 0 | 49.3 to 73.2 degrees |
| October | 59.6 | 36.1 | 2.17 | 1.3 | 36.1 to 59.6 degrees |
| November | 42.5 | 22.7 | 1.36 | 7.4 | 22.7 to 42.5 degrees |
| December | 28.5 | 9.8 | 0.69 | 8.2 | 9.8 to 28.5 degrees |
Source: NOAA NCEI, U.S. Climate Normals 1991-2020 — station USW00014944, Sioux Falls · rates as published for 1991-2020 normals
How to read Sioux Falls climate normals
What a climate normal is, and what it is not.
A normal is the average of thirty years of daily observations at one station — here Sioux Falls, 11.1 km from the centre of Sioux Falls. It describes a typical year, so any single year will run warmer, cooler, wetter or drier. Readings taken at an airport on the edge of town usually sit a degree or two below a dense downtown on summer nights. Sioux Falls sees about 13.8 days a year at or above 90°F and about 52.1 days with a tenth of an inch of precipitation or more.
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Other Sioux Falls data on this site.