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

Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Hazardous Weather Conditions

Current conditions at

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

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

Clear

70°F

21°C

Humidity 24%
Wind Speed NNW 10 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 29 Jun 07:35 AM MST
Extended Forecast for

9 Miles NNW St. Johns AZ

Fire Weather Watch June 30, 11:00am until June 30, 08:00pm
Red Flag Warning June 29, 11:00am until June 29, 08:00pm
Click here for hazard details and duration
Fire Weather Watch
Red Flag Warning

  • Today

    Today: Sunny, with a high near 88. Breezy, with a southwest wind 7 to 12 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph.

    High: 88 °F

    Sunny then
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 53. Breezy, with a southwest wind 17 to 22 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 34 mph.

    Low: 53 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Breezy, with a southeast wind 6 to 11 mph becoming southwest 19 to 24 mph in the afternoon. Winds could gust as high as 39 mph.

    High: 89 °F

    Sunny then
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Clear, with a low around 51. Breezy, with a southwest wind 17 to 22 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 36 mph.

    Low: 51 °F

    Mostly Clear
    and Breezy
    then Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. Breezy, with a light and variable wind becoming southwest 18 to 23 mph in the morning. Winds could gust as high as 31 mph.

    High: 89 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Clear, with a low around 50. Southwest wind 15 to 20 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 29 mph.

    Low: 50 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Light and variable wind becoming west 16 to 21 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. West wind 15 to 20 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 93. Light and variable wind becoming west 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 88. Breezy, with a southwest wind 7 to 12 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph.
Tonight
Mostly clear, with a low around 53. Breezy, with a southwest wind 17 to 22 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 34 mph.
Tuesday
Sunny, with a high near 89. Breezy, with a southeast wind 6 to 11 mph becoming southwest 19 to 24 mph in the afternoon. Winds could gust as high as 39 mph.
Tuesday Night
Clear, with a low around 51. Breezy, with a southwest wind 17 to 22 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 36 mph.
Wednesday
Sunny, with a high near 89. Breezy, with a light and variable wind becoming southwest 18 to 23 mph in the morning. Winds could gust as high as 31 mph.
Wednesday Night
Clear, with a low around 50. Southwest wind 15 to 20 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 29 mph.
Thursday
Sunny, with a high near 91. Light and variable wind becoming west 16 to 21 mph in the afternoon. Winds could gust as high as 28 mph.
Thursday Night
Mostly clear, with a low around 52. West wind 15 to 20 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.
Friday
Mostly sunny, with a high near 93. Light and variable wind becoming west 16 to 21 mph in the afternoon. Winds could gust as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 59. West wind 13 to 18 mph becoming light south after midnight. Winds could gust as high as 25 mph.
Independence Day
Mostly sunny, with a high near 92. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 61. Southwest wind 5 to 10 mph becoming light south after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly sunny, with a high near 94. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 17 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles NNW St. Johns AZ
 34.61°N 109.47°W (Elev. 5597 ft)
Last Update:
4:21 am MDT Jun 29, 2026
Forecast Valid:
8am MDT Jun 29, 2026-6pm MDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation