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

Big Timber Airport (K6S0)

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

Clear

79°F

26°C

Humidity 24%
Wind Speed NW 12 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 18 Jun 01:35 PM MDT
Extended Forecast for

Harlowton MT

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. West wind 16 to 18 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Northwest wind 5 to 14 mph becoming northeast in the evening.

    Low: 50 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 83. West northwest wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 53. Southeast wind 6 to 11 mph becoming west after midnight. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 77. Southeast wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Chance of precipitation is 50%.

    High: 77 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 51. South southeast wind 10 to 18 mph becoming north northwest after midnight. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 70. West northwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Chance of precipitation is 60%.

    High: 70 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 42. West northwest wind 17 to 21 mph. Chance of precipitation is 60%.

    Low: 42 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 60. West wind 16 to 23 mph. Chance of precipitation is 60%.

    High: 60 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 81. West wind 16 to 18 mph.
Tonight
Mostly clear, with a low around 50. Northwest wind 5 to 14 mph becoming northeast in the evening.
Juneteenth
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 83. West northwest wind 5 to 10 mph becoming east southeast in the afternoon.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 53. Southeast wind 6 to 11 mph becoming west after midnight. Chance of precipitation is 60%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 77. Southeast wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Chance of precipitation is 50%.
Friday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 51. South southeast wind 10 to 18 mph becoming north northwest after midnight. Chance of precipitation is 60%.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 70. West northwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 42. West northwest wind 17 to 21 mph. Chance of precipitation is 60%.
Sunday
A chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 60. West wind 16 to 23 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 37. West northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 65. West southwest wind 6 to 10 mph becoming south southeast in the afternoon.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 42. East wind 5 to 10 mph becoming west after midnight.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 71. West wind 5 to 8 mph becoming east northeast in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harlowton MT
 46.44°N 109.85°W (Elev. 4190 ft)
Last Update:
11:09 am MDT Jun 18, 2025
Forecast Valid:
2pm MDT Jun 18, 2025-6pm MDT Jun 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