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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Idaho Falls Regional Airport (KIDA)

Lat: 43.52083°NLon: 112.06611°WElev: 4741.0ft.

Clear

57°F

14°C

Humidity 82%
Wind Speed NNE 12 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 18 Sep 09:35 AM MDT
Extended Forecast for

Idaho Falls ID

Flash Flood Watch until September 18, 10:00pm
Click here for hazard details and duration
Flash Flood Watch
  •  
    Flash Flood Watch until September 18, 10:00pm

    NOW until 10:00pm Fri

    Flash Flood Watch

  • Today

    High: 70 °F

    Scattered
    Showers then
    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely before 3am, then isolated showers between 3am and 4am. Mostly cloudy, with a low around 47. West northwest wind around 6 mph becoming light and variable. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely then
    Scattered
    Showers

  • Saturday

    Saturday: A 30 percent chance of rain, mainly before 9am. Partly sunny, with a high near 62. Southwest wind 6 to 9 mph.

    High: 62 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 45. West southwest wind around 6 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

Detailed Forecast

Today
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 70. North northeast wind 5 to 7 mph becoming south in the afternoon. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms likely before 3am, then isolated showers between 3am and 4am. Mostly cloudy, with a low around 47. West northwest wind around 6 mph becoming light and variable. Chance of precipitation is 70%.
Saturday
A 30 percent chance of rain, mainly before 9am. Partly sunny, with a high near 62. Southwest wind 6 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 45. West southwest wind around 6 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 68. Light and variable wind.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Idaho Falls ID
 43.48°N 112.04°W (Elev. 4701 ft)
Last Update:
8:21 am MDT Sep 18, 2026
Forecast Valid:
9am MDT Sep 18, 2026-6pm MDT Sep 24, 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