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South Dakota weather for September 21, 2026

The day's Local Storm Reports for South Dakota on September 21, 2026 break down this way: 59 reports of rainfall, topping 2.86 inches at 1 NNW Piedmont.

Previous day: Sep 20Next day: Sep 22

1 NNW Piedmont (rain): 2.86″1 NNW Piedmont (rain) 2.86″1 NE Hisega (rain): 2.61″Tilford (rain): 2.58″Piedmont (rain): 2.50″4 NNW Tilford (rain): 2.22″1 NNW Hisega (rain): 1.96″1 ESE Pactola Resv (rain): 1.87″1 N Hisega (rain): 1.85″4 E Hisega (rain): 1.80″2 W Black Hawk (rain): 1.72″Mount Rushmore (rain): 1.49″7 N Wood (rain): 1.24″4 WSW Swett (rain): 1.22″8 NW Vetal (rain): 1.20″3 NNE Johnson Siding (rain): 1.18″3 SSW Argyle (rain): 1.18″7 N Kirley (rain): 1.17″4 NNE Johnson Siding (rain): 1.12″Oral (rain): 1.12″9 N Cedar Butte (rain): 1.09″Hermosa (rain): 1.03″7 WSW Fairburn (rain): 1.01″5 ESE Norris (rain): 1.00″6 N Hamill (rain): 0.99″12 NNW White River (rain): 0.92″1 NW Black Hawk (rain): 0.90″9 SE Kirley (rain): 0.88″2 SSW Norris (rain): 0.87″2 S Pactola Resv (rain): 0.85″2 SSE Ideal (rain): 0.84″Martin (rain): 0.83″3 NE Swett (rain): 0.83″4 NNE Summerset (rain): 0.82″9 SSE Sorum (rain): 0.81″2 WSW Hamill (rain): 0.81″5 WNW Hermosa (rain): 0.78″9 ENE Wewela (rain): 0.77″9 N Wewela (rain): 0.75″9 SE Meadow (rain): 0.74″3 WNW Kadoka (rain): 0.74″4 WNW Dwtn Rapid City (rain): 0.72″6 NNW Dwtn Spearfish (rain): 0.71″8 ESE Prairie City (rain): 0.71″20 WSW Usta (rain): 0.70″2 WSW Sheridan Lake (rain): 0.68″3 NW Dwtn Spearfish (rain): 0.65″3 SSW Swett (rain): 0.65″9 NNE Sturgis (rain): 0.64″5 ENE Custer (rain): 0.63″5 NW Swett (rain): 0.61″2 WNW Oelrichs (rain): 0.60″4 W Hot Springs (rain): 0.60″2 WNW Dwtn Spearfish (rain): 0.60″7 SW Rapid City Arpt (rain): 0.59″1 SSW Newell (rain): 0.59″3 E Midland (rain): 0.58″1 NW Dwtn Spearfish (rain): 0.53″4 S Dwtn Rapid City (rain): 0.52″Hot Springs (rain): 0.50″IAMNMTNENDWY
0.71″ 1.43″ 2.86″ Circle size scaleOne spotter report, sized by amount
Circles show spotter reports for South Dakota on September 21, 2026, each sized by amount. County lines mark the area, and the largest values are labeled. 59 reports are plotted.

Rainfall reports for the day

Rainfall reports for the day: South Dakota, September 21, 2026, 59 reports
AmountPlaceCountyReported byTime
2.86 inches1 NNW PiedmontMeadeCo-Op Observer
2.61 inches1 NE HisegaPenningtonCoCoRaHS
2.58 inchesTilfordMeadeCoCoRaHS
2.50 inchesPiedmontMeadeCoCoRaHS
2.22 inches4 NNW TilfordMeadeCoCoRaHS
1.96 inches1 NNW HisegaPenningtonCoCoRaHS
1.87 inches1 ESE Pactola ResvPenningtonCo-Op Observer
1.85 inches1 N HisegaPenningtonNWS Employee
1.80 inches4 E HisegaPenningtonCoCoRaHS
1.72 inches2 W Black HawkMeadeNWS Employee
1.49 inchesMount RushmorePenningtonCo-Op Observer
1.24 inches7 N WoodMelletteCoCoRaHS
1.22 inches4 WSW SwettBennettCoCoRaHS
1.20 inches8 NW VetalBennettCoCoRaHS
1.18 inches3 NNE Johnson SidingPenningtonCoCoRaHS
1.18 inches3 SSW ArgyleCusterCoCoRaHS
1.17 inches7 N KirleyHaakonCoCoRaHS
1.12 inches4 NNE Johnson SidingPenningtonCoCoRaHS
1.12 inchesOralFall RiverCo-Op Observer
1.09 inches9 N Cedar ButteMelletteCoCoRaHS
1.03 inchesHermosaCusterCoCoRaHS
1.01 inches7 WSW FairburnCusterCoCoRaHS
1.00 inches5 ESE NorrisMelletteTrained Spotter
0.99 inches6 N HamillTrippCoCoRaHS
0.92 inches12 NNW White RiverMelletteCoCoRaHS
0.90 inches1 NW Black HawkMeadeTrained Spotter
0.88 inches9 SE KirleyHaakonCoCoRaHS
0.87 inches2 SSW NorrisMelletteCoCoRaHS
0.85 inches2 S Pactola ResvPenningtonCoCoRaHS
0.84 inches2 SSE IdealTrippCoCoRaHS
0.83 inchesMartinBennettPublic
0.83 inches3 NE SwettBennettCoCoRaHS
0.82 inches4 NNE SummersetMeadeCoCoRaHS
0.81 inches9 SSE SorumPerkinsCoCoRaHS
0.81 inches2 WSW HamillTrippCoCoRaHS
0.78 inches5 WNW HermosaCusterTrained Spotter
0.77 inches9 ENE WewelaTrippCoCoRaHS
0.75 inches9 N WewelaTrippCoCoRaHS
0.74 inches9 SE MeadowPerkinsCoCoRaHS
0.74 inches3 WNW KadokaJacksonCoCoRaHS
0.72 inches4 WNW Dwtn Rapid CityPenningtonCoCoRaHS
0.71 inches6 NNW Dwtn SpearfishLawrenceCoCoRaHS
0.71 inches8 ESE Prairie CityPerkinsCoCoRaHS
0.70 inches20 WSW UstaPerkinsCoCoRaHS
0.68 inches2 WSW Sheridan LakePenningtonCoCoRaHS
0.65 inches3 NW Dwtn SpearfishLawrenceCoCoRaHS
0.65 inches3 SSW SwettBennettCoCoRaHS
0.64 inches9 NNE SturgisMeadeCoCoRaHS
0.63 inches5 ENE CusterCusterCoCoRaHS
0.61 inches5 NW SwettBennettCoCoRaHS
0.60 inches2 WNW OelrichsFall RiverCoCoRaHS
0.60 inches4 W Hot SpringsFall RiverCoCoRaHS
0.60 inches2 WNW Dwtn SpearfishLawrenceCoCoRaHS
0.59 inches7 SW Rapid City ArptPenningtonCoCoRaHS
0.59 inches1 SSW NewellButteCoCoRaHS
0.58 inches3 E MidlandHaakonCoCoRaHS
0.53 inches1 NW Dwtn SpearfishLawrenceCoCoRaHS
0.52 inches4 S Dwtn Rapid CityPenningtonNWS Employee
0.50 inchesHot SpringsFall RiverCoCoRaHS

Storms this day belongs to

Aurora verdict for South Dakota

No Kp reading for the night of September 21 has reached the record for South Dakota yet.

Was there aurora last night in South Dakota?

City climate figures for September 21, 2026

City climate figures for September 21, 2026, South Dakota
CityHighLowRainSnow
Rapid City62°F53°F0.02 inchesn/a
Sioux Falls58°F53°F0.31 inches0.0 inches

A daily climate report from the National Weather Service carries the figures for each city's airport station, and they arrive the following morning.

A single Local Storm Report from a spotter, covering snow, rain or hail, earns a state a day page. Reports come from the National Weather Service, and each day runs on US Eastern time so a single storm day covers the whole country at once.

National Weather Service offices file Local Storm Reports; the Iowa Environmental Mesonet of Iowa State University relays them to this page, where they appear as live spotter reports. The daily climate report is issued by the local National Weather Service forecast office and delivered to this page by the Iowa Environmental Mesonet of Iowa State University. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.