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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

Helena Regional Airport (KHLN)

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

Overcast

70°F

21°C

Humidity 35%
Wind Speed W 19 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 08 Aug 06:05 PM MDT
Extended Forecast for

Helena MT

  • Tonight

    Tonight: A 20 percent chance of showers before 8pm. Partly cloudy, with a low around 51. West wind 8 to 16 mph, with gusts as high as 32 mph.

    Low: 51 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77. West southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53. North northwest wind 6 to 10 mph becoming west southwest in the evening. Winds could gust as high as 21 mph.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 83. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. West northwest wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 87. Light and variable wind becoming west northwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. Northwest wind 5 to 9 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers before 8pm. Partly cloudy, with a low around 51. West wind 8 to 16 mph, with gusts as high as 32 mph.
Saturday
Mostly sunny, with a high near 77. West southwest wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 53. North northwest wind 6 to 10 mph becoming west southwest in the evening. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 83. Southwest wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Mostly clear, with a low around 57. West northwest wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Monday
Sunny, with a high near 87. Light and variable wind becoming west northwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 58. Northwest wind 5 to 9 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 85. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Helena MT
 46.58°N 112.01°W (Elev. 4111 ft)
Last Update:
5:17 pm MDT Aug 8, 2025
Forecast Valid:
6pm MDT Aug 8, 2025-6pm MDT Aug 15, 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