Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Logan-Cache Airport (KLGU)

Lat: 41.78652°NLon: 111.85187°WElev: 4446.0ft.

Clear

82°F

28°C

Humidity 32%
Wind Speed S 8 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 21 Aug 09:35 PM MDT
Extended Forecast for

Lewiston UT

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between midnight and 3am.  Mostly cloudy, with a low around 61. South wind around 6 mph becoming light and variable  after midnight.  Chance of precipitation is 20%.

    Low: 61 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 92. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 92 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after midnight.  Partly cloudy, with a low around 58. Southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 58 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after noon.  Sunny, with a high near 90. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 90 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. West southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between midnight and 3am. Mostly cloudy, with a low around 61. South wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 92. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Saturday Night
A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 58. Southwest wind 5 to 8 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 90. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 56. West southwest wind 5 to 7 mph becoming calm in the evening.
Monday
A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 88.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Lewiston UT
 41.97°N 111.87°W (Elev. 4498 ft)
12:51 pm MDT Aug 21, 2026
9pm MDT Aug 21, 2026-6pm MDT Aug 28, 2026
 
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