Sioux Falls area has 104 places on myweatherrock (103 cities, 1 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 115°F at Canton on July 17, 1936. The coldest night is -47°F at Canton on February 2, 1905. The wettest day brought 9.77 inches of rain at Mapleton No.2 on July 17, 1996. The biggest single-day snow measured 20.98 inches at Sibley on February 18, 1962. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Spencer, about 11 square miles.
About Sioux Falls area weather
The map on the Now tab shows every Sioux Falls area town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 104 Sioux Falls area towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 8°F. May is the wettest, with rain on about 12 days. July afternoons run from about 82°F in Albert to 87°F in Akron. January nights run from about 4°F in Ashton to 11°F in Akron.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
Warnings and alerts: the National Weather Service, passed through unchanged.
Sioux Falls area weather records
Hottest day
115°F
Canton, July 17, 1936
Coldest night
-47°F
Canton, February 2, 1905
Wettest day
9.77 in
Mapleton No.2, July 17, 1996
Biggest snow
20.98 in
Sibley, February 18, 1962
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about Sioux Falls area weather
What is the hottest temperature recorded at a Sioux Falls area station?
115°F at Canton on July 17, 1936, in the NOAA daily station records myweatherrock holds (1893 to 2026).
What is the coldest temperature recorded at a Sioux Falls area station?
-47°F at Canton on February 2, 1905.
What is the most rain a Sioux Falls area station has measured in one day?
9.77 inches at Mapleton No.2 on July 17, 1996.
What is the biggest one-day snowfall at a Sioux Falls area station?
20.98 inches at Sibley on February 18, 1962.
How many Sioux Falls area towns have a weather page here?
104: 103 cities, 1 census-designated places. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
Where does the Sioux Falls area forecast come from?
NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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