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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

St. Johns, St. Johns Industrial Airpark (KSJN)

Lat: 34.51833°NLon: 109.37917°WElev: 5732.0ft.

Clear

36°F

2°C

Humidity 22%
Wind Speed N 0 MPH
Barometer 30.32 in (1026.75 mb)
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Last update 20 Mar 05:54 AM MST
Extended Forecast for

St. Johns AZ

  • Today

    Today: Sunny, with a high near 89. Calm wind becoming northwest 5 to 9 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 37. Northwest wind 5 to 10 mph becoming southeast after midnight.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93. Light and variable wind becoming west 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 93 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. West wind 12 to 17 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 24 mph.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 87. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 23 mph.

    High: 87 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 38. West wind 5 to 15 mph becoming south after midnight. Winds could gust as high as 22 mph.

    Low: 38 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 85. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38. West wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 85 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 89. Calm wind becoming northwest 5 to 9 mph in the afternoon.
Tonight
Mostly clear, with a low around 37. Northwest wind 5 to 10 mph becoming southeast after midnight.
Saturday
Sunny, with a high near 93. Light and variable wind becoming west 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
Mostly clear, with a low around 38. West wind 12 to 17 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 24 mph.
Sunday
Mostly sunny, with a high near 87. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 23 mph.
Sunday Night
Mostly cloudy, with a low around 38. West wind 5 to 15 mph becoming south after midnight. Winds could gust as high as 22 mph.
Monday
Sunny, with a high near 85. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Mostly clear, with a low around 38. West wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.
Tuesday
Sunny, with a high near 85. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 16 mph.
Tuesday Night
Clear, with a low around 38. Northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 16 mph.
Wednesday
Sunny, with a high near 88. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Clear, with a low around 38. West wind 5 to 13 mph becoming south after midnight. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 86. Light and variable wind becoming west 11 to 16 mph in the afternoon. Winds could gust as high as 23 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St. Johns AZ
 34.51°N 109.37°W (Elev. 5797 ft)
Last Update:
5:05 am MDT Mar 20, 2026
Forecast Valid:
7am MDT Mar 20, 2026-6pm MDT Mar 26, 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