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

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Current conditions at

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

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

Clear

39°F

4°C

Humidity 44%
Wind Speed SSE 4 MPH
Barometer 30.2 in (1022.69 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 17 Mar 04:35 AM MST
Extended Forecast for

St. Johns AZ

  • Today

    Today: Sunny, with a high near 76. Light and variable wind becoming northwest 9 to 14 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 34. Northwest wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 34 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Calm wind becoming north 5 to 8 mph in the afternoon.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37. Northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 37 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 88. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 39. Northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 39 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 88. Light and variable wind becoming northwest 6 to 11 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 41. Northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 16 mph.

    Low: 41 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 89. Light and variable wind becoming west 9 to 14 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 89 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 76. Light and variable wind becoming northwest 9 to 14 mph in the afternoon. Winds could gust as high as 21 mph.
Tonight
Mostly clear, with a low around 34. Northwest wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 84. Calm wind becoming north 5 to 8 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 37. Northwest wind 5 to 9 mph becoming calm after midnight.
Thursday
Sunny, with a high near 88. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Thursday Night
Clear, with a low around 39. Northwest wind 5 to 9 mph becoming calm after midnight.
Friday
Sunny, with a high near 88. Light and variable wind becoming northwest 6 to 11 mph in the afternoon. Winds could gust as high as 16 mph.
Friday Night
Clear, with a low around 41. Northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 16 mph.
Saturday
Sunny, with a high near 89. Light and variable wind becoming west 9 to 14 mph in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Clear, with a low around 42. West wind 6 to 14 mph becoming south after midnight. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 85. Light and variable wind becoming west 12 to 17 mph in the afternoon. Winds could gust as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 42. Southwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 23 mph.
Monday
Sunny, with a high near 82. South wind 5 to 10 mph becoming west 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St. Johns AZ
 34.51°N 109.37°W (Elev. 5797 ft)
Last Update:
5:12 am MDT Mar 17, 2026
Forecast Valid:
5am MDT Mar 17, 2026-6pm MDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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