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

Areas of Severe Thunderstorms and Heat

Scattered severe thunderstorms and excessive rainfall are possible today in the Mid Atlantic, posing a risk for damaging winds and isolated flash flooding. Extreme Heat Warnings are in effect today for northeast Texas into southern Oklahoma and Arkansas. Extreme Heat Warnings are also in effect for the Desert Southwest today into Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Lamoni, Lamoni Municipal Airport (KLWD)

Lat: 40.63°NLon: 93.9°WElev: 1129ft.

Fair

77°F

25°C

Humidity 71%
Wind Speed Calm
Barometer 30.09 in (1018.4 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 20 Aug 10:53 am CDT
Extended Forecast for

Decatur IA

  • Today

    Today: Sunny, with a high near 81. Light and variable wind.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. Calm wind becoming south around 5 mph after midnight.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. West wind 5 to 8 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65. West northwest wind around 5 mph becoming light and variable in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 82. Calm wind becoming north 5 to 8 mph in the afternoon.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 81. Light and variable wind.
Tonight
Mostly clear, with a low around 66. Calm wind becoming south around 5 mph after midnight.
Friday
Sunny, with a high near 85. West wind 5 to 8 mph.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65. West northwest wind around 5 mph becoming light and variable in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Sunny, with a high near 82. Calm wind becoming north 5 to 8 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Partly sunny, with a high near 79.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63.
Monday
Partly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 84.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IA
 40.75°N 93.84°W
Last Update:
6:47 am CDT Aug 20, 2026
Forecast Valid:
11am CDT Aug 20, 2026-6pm CDT Aug 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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