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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 >

Current conditions at

Big Timber Airport (K6S0)

Lat: 45.80647°NLon: 109.97826°WElev: 4494.0ft.

Clear

77°F

25°C

Humidity 33%
Wind Speed NNE 5 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Aug 12:05 PM MDT
Extended Forecast for

Big Timber MT

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 85. East southeast wind 7 to 9 mph becoming south southwest. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms before 9pm. Areas of smoke. Mostly cloudy, then gradually becoming mostly clear, with a low around 56. South wind 6 to 9 mph becoming west in the evening.

    Low: 56 °F

    Chance
    T-storms then
    Areas Smoke

  • Monday

    Monday: Areas of smoke before 9am. Sunny, with a high near 87. West southwest wind 7 to 9 mph becoming south in the afternoon.

    High: 87 °F

    Areas Smoke
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59. South southwest wind 6 to 8 mph becoming east southeast in the evening.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 94. West southwest wind around 8 mph becoming south southeast in the afternoon.

    High: 94 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. East southeast wind 8 to 10 mph becoming west northwest after midnight.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 95. West southwest wind 10 to 13 mph.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60. West wind around 10 mph.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. West southwest wind 8 to 11 mph becoming northeast in the afternoon.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 85. East southeast wind 7 to 9 mph becoming south southwest. Chance of precipitation is 60%.
Tonight
A 50 percent chance of showers and thunderstorms before 9pm. Areas of smoke. Mostly cloudy, then gradually becoming mostly clear, with a low around 56. South wind 6 to 9 mph becoming west in the evening.
Monday
Areas of smoke before 9am. Sunny, with a high near 87. West southwest wind 7 to 9 mph becoming south in the afternoon.
Monday Night
Partly cloudy, with a low around 59. South southwest wind 6 to 8 mph becoming east southeast in the evening.
Tuesday
Sunny and hot, with a high near 94. West southwest wind around 8 mph becoming south southeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 61. East southeast wind 8 to 10 mph becoming west northwest after midnight.
Wednesday
Sunny and hot, with a high near 95. West southwest wind 10 to 13 mph.
Wednesday Night
Partly cloudy, with a low around 60. West wind around 10 mph.
Thursday
Sunny, with a high near 85. West southwest wind 8 to 11 mph becoming northeast in the afternoon.
Thursday Night
Partly cloudy, with a low around 54. North northeast wind 7 to 13 mph.
Friday
Sunny, with a high near 80. East northeast wind 7 to 10 mph.
Friday Night
Mostly clear, with a low around 52. East northeast wind 6 to 13 mph becoming north after midnight.
Saturday
Sunny, with a high near 82. North northwest wind 6 to 10 mph becoming east in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Big Timber MT
 45.81°N 109.97°W (Elev. 4400 ft)
Last Update:
11:08 am MDT Aug 17, 2025
Forecast Valid:
12pm MDT Aug 17, 2025-6pm MDT Aug 23, 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