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

43°F

6°C

Humidity 52%
Wind Speed N 0 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 15 Apr 07:05 AM MST
Extended Forecast for

St. Johns AZ

  • Today

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

    High: 66 °F

    Sunny

  • Tonight

    Tonight: 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

  • Sunday

    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.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 66. Light west wind increasing to 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Tonight
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:
4:34 am MDT Apr 15, 2026
Forecast Valid:
8am MDT Apr 15, 2026-6pm MDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation