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

Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. 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 60%
Wind Speed S 3 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 15 Apr 02:20 AM MST
Extended Forecast for

St. Johns AZ

  • Overnight

    Overnight: Clear, with a low around 31. Southwest wind around 7 mph.

    Low: 31 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 66. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 66 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 31. Northwest wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 18 mph.

    Low: 31 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 72. Breezy, with a south wind 5 to 10 mph becoming southwest 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph.

    High: 72 °F

    Sunny then
    Partly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 35. Breezy, with a southwest wind 18 to 23 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 37 mph.

    Low: 35 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Friday

    Friday: Sunny, with a high near 65. Breezy, with a southwest wind 16 to 21 mph becoming west 24 to 29 mph in the afternoon. Winds could gust as high as 45 mph.

    High: 65 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Clear, with a low around 23. Blustery, with a northwest wind 14 to 23 mph becoming northeast after midnight. Winds could gust as high as 37 mph.

    Low: 23 °F

    Mostly Clear
    and Blustery
    then Clear

  • Saturday

    Saturday: Sunny, with a high near 67. Northeast wind 10 to 14 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35. North wind 7 to 10 mph becoming southeast after midnight. Winds could gust as high as 15 mph.

    Low: 35 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 31. Southwest wind around 7 mph.
Wednesday
Sunny, with a high near 66. Light and variable wind becoming west 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 31. Northwest wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 18 mph.
Thursday
Increasing clouds, with a high near 72. Breezy, with a south wind 5 to 10 mph becoming southwest 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph.
Thursday Night
Mostly cloudy, with a low around 35. Breezy, with a southwest wind 18 to 23 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 37 mph.
Friday
Sunny, with a high near 65. Breezy, with a southwest wind 16 to 21 mph becoming west 24 to 29 mph in the afternoon. Winds could gust as high as 45 mph.
Friday Night
Clear, with a low around 23. Blustery, with a northwest wind 14 to 23 mph becoming northeast after midnight. Winds could gust as high as 37 mph.
Saturday
Sunny, with a high near 67. Northeast wind 10 to 14 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 35. North wind 7 to 10 mph becoming southeast after midnight. Winds could gust as high as 15 mph.
Sunday
Mostly sunny, with a high near 75. Southeast wind 9 to 15 mph becoming south in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 41. South wind 8 to 14 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 75. South wind 7 to 16 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.
Monday Night
Mostly clear, with a low around 40. Southwest wind 11 to 16 mph becoming south 5 to 10 mph after midnight. Winds could gust as high as 24 mph.
Tuesday
Sunny, with a high near 75. South wind 5 to 10 mph becoming west 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Johns AZ
 34.51°N 109.37°W (Elev. 5797 ft)
Last Update:
12:37 am MDT Apr 15, 2026
Forecast Valid:
3am MDT Apr 15, 2026-6pm MDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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