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

Helena Regional Airport (KHLN)

Lat: 46.60445°NLon: 111.9892°WElev: 3874.0ft.

Clear

64°F

18°C

Humidity 39%
Wind Speed N 0 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 16 Aug 04:05 AM MDT
Extended Forecast for

Helena MT

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Widespread haze after 3pm. Areas of smoke before 3pm. Increasing clouds, with a high near 89. Light and variable wind becoming north northeast 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 89 °F

    Areas Smoke
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Widespread haze between midnight and 3am. Areas of smoke before midnight, then areas of smoke after 3am. Mostly cloudy, with a low around 56. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 56 °F

    Chance
    T-storms then
    Haze

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after noon. Widespread haze. Mostly sunny, with a high near 85. Calm wind becoming west northwest 5 to 8 mph in the afternoon.

    High: 85 °F

    Haze then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Widespread haze before 7pm. Mostly cloudy, with a low around 55. South wind 3 to 8 mph. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 88. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. West northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 57. East northeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 57 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Widespread haze after 3pm. Areas of smoke before 3pm. Increasing clouds, with a high near 89. Light and variable wind becoming north northeast 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Widespread haze between midnight and 3am. Areas of smoke before midnight, then areas of smoke after 3am. Mostly cloudy, with a low around 56. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Sunday
A 30 percent chance of showers and thunderstorms after noon. Widespread haze. Mostly sunny, with a high near 85. Calm wind becoming west northwest 5 to 8 mph in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Widespread haze before 7pm. Mostly cloudy, with a low around 55. South wind 3 to 8 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 88. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Monday Night
Mostly clear, with a low around 57. West northwest wind 5 to 7 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 93. Calm wind becoming east 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Partly cloudy, with a low around 57. East northeast wind 5 to 7 mph becoming light and variable after midnight.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Helena MT
 46.61°N 112.02°W (Elev. 3940 ft)
Last Update:
2:21 am MDT Aug 16, 2025
Forecast Valid:
4am MDT Aug 16, 2025-6pm MDT Aug 22, 2025
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation