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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Kilo - Harlowton (K1KM)

Lat: 46.5°NLon: 109.8°WElev: 4452.0ft.

Clear

57°F

14°C

Humidity 69%
Wind Speed N 12 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 28 Aug 02:55 AM MDT
Extended Forecast for

Harlowton MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 56. West northwest wind around 11 mph.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 80. West northwest wind 5 to 13 mph becoming northeast in the morning. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers after 8pm. Mostly cloudy, with a low around 54. South wind 6 to 9 mph becoming north northwest in the evening.

    Low: 54 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after noon. Cloudy, then gradually becoming mostly sunny, with a high near 77. West wind 7 to 9 mph. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. North wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 70%.

    Low: 48 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, with thunderstorms also possible after noon. High near 70. West southwest wind 9 to 14 mph increasing to 19 to 24 mph in the afternoon. Chance of precipitation is 80%.

    High: 70 °F

    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. West wind 19 to 24 mph decreasing to 13 to 18 mph after midnight.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77. West wind 9 to 13 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. West wind 9 to 14 mph becoming light and variable after midnight.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 56. West northwest wind around 11 mph.
Friday
A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 80. West northwest wind 5 to 13 mph becoming northeast in the morning. Chance of precipitation is 40%.
Friday Night
A 20 percent chance of showers after 8pm. Mostly cloudy, with a low around 54. South wind 6 to 9 mph becoming north northwest in the evening.
Saturday
A chance of showers, with thunderstorms also possible after noon. Cloudy, then gradually becoming mostly sunny, with a high near 77. West wind 7 to 9 mph. Chance of precipitation is 50%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48. North wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 70%.
Sunday
Showers, with thunderstorms also possible after noon. High near 70. West southwest wind 9 to 14 mph increasing to 19 to 24 mph in the afternoon. Chance of precipitation is 80%.
Sunday Night
Mostly clear, with a low around 42. West wind 19 to 24 mph decreasing to 13 to 18 mph after midnight.
Monday
Sunny, with a high near 77. West wind 9 to 13 mph.
Monday Night
Mostly clear, with a low around 45. West wind 9 to 14 mph becoming light and variable after midnight.
Tuesday
Sunny, with a high near 81. West wind 5 to 10 mph becoming south in the afternoon.
Tuesday Night
Partly cloudy, with a low around 48. South wind 7 to 11 mph becoming west after midnight.
Wednesday
Mostly sunny, with a high near 81. Southwest wind 9 to 15 mph.
Wednesday Night
Partly cloudy, with a low around 46. West wind 9 to 16 mph.
Thursday
Mostly sunny, with a high near 77. Southwest wind 9 to 16 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harlowton MT
 46.44°N 109.82°W (Elev. 4199 ft)
Last Update:
12:32 am MDT Aug 28, 2026
Forecast Valid:
3am MDT Aug 28, 2026-6pm MDT Sep 3, 2026
 
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