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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Ankeny Regional Airport (KIKV)

Lat: 41.69°NLon: 93.57°WElev: 886ft.

Fair

45°F

7°C

Humidity 81%
Wind Speed Vrbl 6 mph
Barometer 30.56 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 17 Oct 9:35 am CDT
Extended Forecast for

Johnston IA

  • Today

    Today: Sunny, with a high near 60. Light south southeast wind becoming south southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph.

    High: 60 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 40. South wind around 9 mph.

    Low: 40 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 65. South wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. South wind 3 to 8 mph.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 67. South wind 5 to 8 mph.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 60. Light south southeast wind becoming south southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Tonight
Clear, with a low around 40. South wind around 9 mph.
Sunday
Sunny, with a high near 65. South wind 9 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 42. South wind 3 to 8 mph.
Monday
Mostly sunny, with a high near 67. South wind 5 to 8 mph.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Johnston IA
 41.72°N 93.68°W
Last Update:
9:36 am CDT Oct 17, 2026
Forecast Valid:
9am CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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