National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

BUFFALO RAPIDS/TERRY (BRTM)

Lat: 46.77806°NLon: 105.29944°WElev: 2270.0ft.

NA

63°F

17°C

Humidity 97%
Wind Speed S 1 MPH
Barometer NA
Dewpoint 62°F (17°C)
Visibility NA
Last update 17 Aug 03:30 AM MDT
Extended Forecast for

Fallon MT

  • Today

    Today: A slight chance of showers between 2pm and 5pm. Sunny, with a high near 91. Calm wind becoming north northwest around 6 mph in the morning. Chance of precipitation is 20%.

    High: 91 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 2am and 3am. Increasing clouds, with a low around 63. Northeast wind around 6 mph becoming calm in the evening.

    Low: 63 °F

    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 92. Calm wind becoming south southeast around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. Southeast wind around 6 mph becoming calm after midnight.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. East southeast wind 6 to 8 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 104. South southeast wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 104 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 66. South southwest wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 66 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 87. North northwest wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 87 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers between 2pm and 5pm. Sunny, with a high near 91. Calm wind becoming north northwest around 6 mph in the morning. Chance of precipitation is 20%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 2am and 3am. Increasing clouds, with a low around 63. Northeast wind around 6 mph becoming calm in the evening.
Monday
A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 92. Calm wind becoming south southeast around 6 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 63. Southeast wind around 6 mph becoming calm after midnight.
Tuesday
Sunny and hot, with a high near 99. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 67. East southeast wind 6 to 8 mph.
Wednesday
Sunny and hot, with a high near 104. South southeast wind 6 to 10 mph, with gusts as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 66. South southwest wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 87. North northwest wind 6 to 11 mph, with gusts as high as 22 mph.
Thursday Night
A 30 percent chance of showers after midnight. Mostly clear, with a low around 56. North wind 5 to 11 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers. Sunny, with a high near 81. North northwest wind 5 to 9 mph.
Friday Night
A slight chance of showers. Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fallon MT
 46.82°N 105.15°W (Elev. 2198 ft)
Last Update:
2:28 am MDT Aug 17, 2025
Forecast Valid:
4am MDT Aug 17, 2025-6pm MDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

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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