White River, SD Weather

Mellette County4:01 AM CDT43.57°N, 100.75°WElevation 2,136 ft

Current conditions

Clear
52°
Clear
Feels like 52°
High 80°·Low 49° tonight
WindSSE 7 mph
Humidity87%
Dew point48°
Pressure30.17 inHg
Visibility10 mi
Cloud cover10%
UV index0 Low
Sunrise8:06 AM
Sunset6:50 PM

Observed at Winner, Bob Wiley Field Airport · 31 min ago

Forecast

10-day

  • Wednesday Night

    Mostly clear. Low around 49, with temperatures rising to around 52 overnight. Southeast wind around 7 mph.

  • Thursday

    Sunny, with a high near 80. South wind 7 to 18 mph, with gusts as high as 30 mph.

  • Thursday Night

    Partly cloudy. Low around 59, with temperatures rising to around 61 overnight. Southeast wind 15 to 24 mph, with gusts as high as 37 mph.

National Weather Service forecast updated 1 day ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 52°
  2. 5 AM Mostly Clear 52°
  3. 6 AM Sunny 52°
  4. 7 AM Mostly Sunny 50°
  5. 8 AM Sunny 51°
  6. 9 AM Sunny 55°
  7. 10 AM Sunny 60°
  8. 11 AM Sunny 66°
  9. 12 PM Sunny 71°
  10. 1 PM Sunny 76°
  11. 2 PM Sunny 78°
  12. 3 PM Sunny 80°
  13. 4 PM Mostly Sunny 80°
  14. 5 PM Mostly Sunny 79°
  15. 6 PM Partly Cloudy 77°
  16. 7 PM Partly Cloudy 74°
  17. 8 PM Partly Cloudy 71°
  18. 9 PM Partly Cloudy 69°
  19. 10 PM Mostly Cloudy 66°
  20. 11 PM Mostly Cloudy 65°
  21. Fri12 AM Partly Cloudy 63°
  22. 1 AM Partly Cloudy 63°12%
  23. 2 AM Mostly Cloudy 62°12%
  24. 3 AM Mostly Cloudy 62°12%

10-day forecast

Details
  1. TonightOct 20 Mostly Clear Mostly Clear46°
  2. WedOct 21 Sunny Sunny49°73°
  3. TodayOct 22 Sunny Sunny12%59°80°
  4. FriOct 23 Partly Sunny then Slight Chance Rain Showers Partly Sunny then Slight Chance Rain Showers29%49°82°
  5. SatOct 24 Slight Chance Light Rain then Mostly Sunny Slight Chance Light Rain then Mostly Sunny17%40°59°
  6. SunOct 25 Slight Chance Light Rain then Sunny Slight Chance Light Rain then Sunny17%38°57°
  7. MonOct 26 Slight Chance Light Rain Slight Chance Light Rain15%37°53°
  8. TueOct 27 Mostly Sunny Mostly Sunny12%58°
  9. WedOct 28 Sunny Sunny30°57°
  10. ThuOct 29 Partly cloudy Partly cloudy39°62°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news in South Dakota

More weather news

Sun & moon

Sunrise 8:06 AM
Sunset 6:50 PM
Daylight 10 h 43 min (−2 min 48 s tomorrow)
Waxing Gibbous · 84% lit
Moonrise 4:59 PM Moonset 4:07 AM
Full moon Oct 26 New moon Nov 9

Forecasters' discussion

From the National Weather Service office in UNR, issued 15 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 18Z TAFS Through 18Z Thursday) Issued At 1124 AM MDT Wed Oct 21 2026

VFR conditions are expected through the forecast period.

Main aviation changes will be centered around winds but overall concerns are low. Increased wind speeds, upwards of 10 to 20 kts, are likely through the tonight for NE WY and NW SD before a lull in speeds Thursday morning. Wind speeds increase again, up to 10 to 15 kts, for most of the area for Thursday afternoon.

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.