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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Buffalo (K2WX)

Lat: 45.6°NLon: 103.55°WElev: 3002ft.

79°F

26°C

Humidity 62%
Wind Speed S 6 mph
Barometer 29.90 in (1010.3 mb)
Dewpoint 65°F (18°C)
Visibility NA
Heat Index81°F (27°C)
Last update 17 Aug 7:56 pm MDT
Extended Forecast for

9 Miles SW Buffalo SD

  • Tonight

    Tonight: Partly cloudy, with a low around 63. East wind around 5 mph becoming west after midnight.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 89. Southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. East wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 15 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 98 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. Southeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 30 mph.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers after midnight. Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear
    then Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 63. East wind around 5 mph becoming west after midnight.
Monday
Sunny, with a high near 89. Southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Monday Night
Mostly clear, with a low around 63. East wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 93. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 67. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Sunny, with a high near 98. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 67. Southeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 30 mph.
Thursday
Sunny, with a high near 89. Southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
A chance of showers after midnight. Mostly clear, with a low around 58.
Friday
A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 79.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 53.
Saturday
Sunny, with a high near 75.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 52.
Sunday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles SW Buffalo SD
 45.51°N 103.7°W (Elev. 2999 ft)
Last Update:
7:09 pm MDT Aug 17, 2025
Forecast Valid:
8pm MDT Aug 17, 2025-6pm MDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation