Tracking Major Hurricane Erin; Hot in the Mid-Mississippi Valley

Major Hurricane Erin is tracking just north of the lower Bahamas today. Dangerous surf and rip current threats increase this week for most of the Atlantic coastline. Erin's outerbands may impact the Outer Banks later this week. Hot to extremely hot temperatures are forecast today and Tuesday from a part of the southern Plains into the central to lower Mississippi River Valley. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Clear

75°F

24°C

Humidity 38%
Wind Speed ESE 5 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 18 Aug 11:35 AM MDT
Extended Forecast for

4 Miles SW Lewistown Municipal MT

  • Today

    Today: Sunny, with a high near 85. Northeast wind 3 to 6 mph.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight.  Partly cloudy, with a low around 59. East northeast wind around 6 mph becoming south in the evening.  Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. South southeast wind around 6 mph becoming light and variable.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60. Southeast wind 6 to 8 mph.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Southwest wind 6 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after midnight.  Mostly cloudy, with a low around 56. North wind 6 to 8 mph becoming west southwest after midnight.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after noon.  Mostly sunny, with a high near 77. West southwest wind 6 to 9 mph becoming north northwest in the afternoon.

    High: 77 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. North wind 6 to 9 mph becoming east southeast after midnight.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 85. Northeast wind 3 to 6 mph.
Tonight
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Partly cloudy, with a low around 59. East northeast wind around 6 mph becoming south in the evening. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 93. South southeast wind around 6 mph becoming light and variable.
Tuesday Night
Mostly clear, with a low around 60. Southeast wind 6 to 8 mph.
Wednesday
Sunny, with a high near 88. Southwest wind 6 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 56. North wind 6 to 8 mph becoming west southwest after midnight.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 77. West southwest wind 6 to 9 mph becoming north northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 52. North wind 6 to 9 mph becoming east southeast after midnight.
Friday
Sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 50.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Lewistown Municipal MT
 47°N 109.51°W (Elev. 4321 ft)
10:05 am MDT Aug 18, 2025
11am MDT Aug 18, 2025-6pm MDT Aug 24, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database