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Winner, SD Weather
Current conditions
Observed at Winner, Bob Wiley Field Airport · 16 min ago
Forecast
10-day-
Overnight
Clear. Low around 47, with temperatures rising to around 54 overnight. Southwest wind 7 to 13 mph, with gusts as high as 18 mph.
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Wednesday
Sunny, with a high near 70. Northwest wind around 8 mph, with gusts as high as 16 mph.
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Wednesday Night
Mostly clear. Low around 46, with temperatures rising to around 50 overnight. Southeast wind around 8 mph.
National Weather Service forecast updated 1 hr ago.
Hourly
Hourly forecast- Now59°
- 3 AM58°
- 4 AM56°
- 5 AM54°
- 6 AM51°
- 7 AM48°
- 8 AM48°
- 9 AM49°
- 10 AM54°
- 11 AM58°
- 12 PM61°
- 1 PM64°
- 2 PM67°
- 3 PM69°
- 4 PM69°
- 5 PM69°
- 6 PM66°
- 7 PM62°
- 8 PM58°
- 9 PM56°
- 10 PM55°
- 11 PM53°
- Thu12 AM52°
- 1 AM52°
10-day forecast
Details- TonightOct 20Clear47°
- TodayOct 21Sunny46°70°
- ThuOct 22Sunny59°79°
- FriOct 23Mostly Sunny40%50°82°
- SatOct 24Chance Light Rain40%38°59°
- SunOct 25Chance Rain53%34°53°
- MonOct 26Chance Light Rain53%33°50°
- TueOct 27Slight Chance Light Rain then Partly Sunny16%53°
- WedOct 28Sunny30°55°
- ThuOct 29Mostly sunny39°60°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
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Sun & moon
Almanac
MonthlyWinner, records since 1910. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Forecasters' discussion
From the National Weather Service office in UNR, issued 2 hrs ago
Key Messages
- Warm and dry weather through much of this week.
Update
Issued at 1058 PM MDT Tue Oct 20 2026
No major changes to the forecast this evening. Surface analysis shows a weak cold front crossing NW SD at this time. Across SW SD, temps are in the mid to upper 50s while over NW SD into portions of NE WY temps are dropping into the upper 40s. NW winds will continue overnight into Wed morning, then return flow sets up as the surface high pushes east of the CWA Wed afternoon. Max temps on Wed will be in the 60s to low 70s...but then a decent overnight LLJ/warm air advection will push highs on Thursday well above average (upper 70s to possibly mid 80s over the western SD plains).
Discussion
(This Evening Through Tuesday) Issued at 1254 PM MDT Tue Oct 20 2026
Current upper level analysis shows broad ridging over the central and western US with deepening trof off the west coast. The CWA sits under upper level southwest flow and clear skies. Sfc stations report light southerly winds across much of western SD with temperatures in the 60s to low 70s.
Weak front will cross the CWA overnight with the only impacts being a slight drop in tomorrow's highs and a brief period of breezy northwest winds overnight. Upper ridge builds over the region Wednesday into Thursday with southerly return flow supporting warming temps over the area.
Southerly winds pick up early Friday morning as upper level trof approaches with attendant sfc low and trailing cold front crossing the Northern Plains. WAA ahead of the front Friday afternoon will support highs in the upper 70s to low 80s over the western SD plains. As the front crosses the area later Friday evening, winds will shift to the northwest but remain breezy through the night, especially over northwestern SD. Much cooler conditions expected over the weekend with low chances for light precip.
Aviation
(For the 06Z TAFS Through 06Z Wednesday Night) Issued At 1040 PM MDT Tue Oct 20 2026
VFR conditions are expected through the forecast period.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.