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

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

I-40 @ Painted Desert NP HQ (AZT13)

Lat: 35.0637°NLon: 109.77562°WElev: 5745.0ft.

NA

80°F

27°C

Humidity 35%
Wind Speed NNW 2 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility 1.24 mi
Heat Index80°F (27°C)
Last update 21 Aug 09:53 AM MST
Extended Forecast for

42 Miles NNW St. Johns AZ

  • Today

    Today: Sunny, with a high near 95. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 95 °F

    Sunny

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. West wind 5 to 9 mph becoming northeast in the evening. Winds could gust as high as 16 mph.

    Low: 63 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 94. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 10 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 62. Southwest wind 5 to 11 mph becoming east after midnight. Winds could gust as high as 20 mph.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 94. Light and variable wind becoming west 9 to 14 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60. West wind 8 to 13 mph becoming light and variable. Winds could gust as high as 22 mph.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 94. Southeast wind 5 to 7 mph becoming west in the afternoon.

    High: 94 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. West wind 5 to 7 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 95 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 95. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 16 mph.
Tonight
A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. West wind 5 to 9 mph becoming northeast in the evening. Winds could gust as high as 16 mph.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 94. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
A 10 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 62. Southwest wind 5 to 11 mph becoming east after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 94. Light and variable wind becoming west 9 to 14 mph in the afternoon. Winds could gust as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 60. West wind 8 to 13 mph becoming light and variable. Winds could gust as high as 22 mph.
Monday
Mostly sunny, with a high near 94. Southeast wind 5 to 7 mph becoming west in the afternoon.
Monday Night
Partly cloudy, with a low around 65. West wind 5 to 7 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 95. Calm wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Partly cloudy, with a low around 66. West wind 5 to 7 mph becoming light and variable in the evening. Winds could gust as high as 15 mph.
Wednesday
Sunny and hot, with a high near 96. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 16 mph.
Wednesday Night
Partly cloudy, with a low around 66. West wind 5 to 9 mph becoming light and variable in the evening. Winds could gust as high as 17 mph.
Thursday
Sunny and hot, with a high near 96. Light and variable wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 17 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
42 Miles NNW St. Johns AZ
 35.07°N 109.64°W (Elev. 5499 ft)
Last Update:
10:12 am MDT Aug 21, 2026
Forecast Valid:
11am MDT Aug 21, 2026-6pm MDT Aug 27, 2026
 
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