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

Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Saturday

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into the Tennessee Valley Saturday. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys Saturday. Extreme heat will continue for the Intermountain West and Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Ankeny Regional Airport (KIKV)

Lat: 41.69°NLon: 93.57°WElev: 886ft.

Fair

72°F

22°C

Humidity 88%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 10 Jul 11:15 pm CDT
Extended Forecast for

Johnston IA

  • Tonight

    Tonight: A 10 percent chance of showers before midnight. Mostly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 87. Calm wind becoming east northeast 5 to 7 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64. East northeast wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 88. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 65. East wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 67.

    Low: 67 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
A 10 percent chance of showers before midnight. Mostly cloudy, with a low around 68. Calm wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming east northeast 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. East northeast wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 88. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Clear, with a low around 65. East wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 90.
Monday Night
Clear, with a low around 67.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 71.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 73.
Friday
Sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Johnston IA
 41.69°N 93.71°W
Last Update:
10:44 pm CDT Jul 10, 2026
Forecast Valid:
11pm CDT Jul 10, 2026-6pm CDT Jul 17, 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