Air Quality Concerns; Fire Weather in the West; Flash Flooding in the Southeast

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Multiple days of hot, dry and windy conditions are expected to bring fire weather concerns for portions of the Four Corners region into the central Great Basin and Rockies. Heavy rainfall and a flash flooding threat continues in the Southeast. Severe thunderstorms continue across the Northern Plains Read More >

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Mostly Cloudy

77°F

25°C

Humidity 69%
Wind Speed SE 13 mph
Barometer 30.24 in (1023.5 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 5 Aug 11:53 am CDT
Extended Forecast for

Union IA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. South southeast wind around 9 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Southeast wind around 7 mph.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 84. South southeast wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 84 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 68. South southeast wind 7 to 9 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 87. South wind 7 to 10 mph.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm.  Mostly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. South southeast wind around 9 mph.
Tonight
Partly cloudy, with a low around 64. Southeast wind around 7 mph.
Wednesday
Partly sunny, with a high near 84. South southeast wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. South southeast wind 7 to 9 mph.
Thursday
Mostly sunny, with a high near 87. South wind 7 to 10 mph.
Thursday Night
Mostly clear, with a low around 71.
Friday
Sunny, with a high near 90.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Sunday
A 30 percent chance of showers. Mostly sunny, with a high near 83.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Monday
A 30 percent chance of showers. Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Union IA
 42.26°N 93.06°W
11:54 am CDT Aug 5, 2025
12pm CDT Aug 5, 2025-6pm CDT Aug 11, 2025
 
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