Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Rexburg, Rexburg-Madison County Airport (KRXE)

Lat: 43.83167°NLon: 111.80611°WElev: 4859.0ft.

Clear

53°F

12°C

Humidity 82%
Wind Speed NNE 3 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 19 Aug 05:53 AM MDT
Extended Forecast for

4 Miles NNE Rigby ID

Heat Advisory August 21, 12:00pm until August 21, 10:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Sunny, with a high near 86. Light and variable wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Light and variable wind becoming southeast 5 to 7 mph in the evening.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92. Light and variable wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. West southwest wind around 6 mph becoming east after midnight.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 94. East wind around 6 mph becoming light and variable.

    High: 94 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before midnight, then a slight chance of rain after midnight.  Mostly cloudy, with a low around 60. Chance of precipitation is 20%.

    Low: 60 °F

    Slight Chance
    T-storms then
    Slight Chance
    Rain

  • Saturday

    Saturday: A chance of rain before noon, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance Rain
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 86. Light and variable wind becoming west southwest 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 53. Light and variable wind becoming southeast 5 to 7 mph in the evening.
Thursday
Sunny, with a high near 92. Light and variable wind becoming west southwest 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 58. West southwest wind around 6 mph becoming east after midnight.
Friday
Mostly sunny, with a high near 94. East wind around 6 mph becoming light and variable.
Friday Night
A slight chance of showers and thunderstorms before midnight, then a slight chance of rain after midnight. Mostly cloudy, with a low around 60. Chance of precipitation is 20%.
Saturday
A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 86. Chance of precipitation is 30%.
Saturday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 55.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Mostly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Tuesday
A 30 percent chance of rain and thunderstorms. Partly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Rigby ID
 43.74°N 111.87°W (Elev. 4849 ft)
5:31 am MDT Aug 19, 2026
6am MDT Aug 19, 2026-6pm MDT Aug 25, 2026
 
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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