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

Hazardous Weather Conditions

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Overcast

36°F

2°C

Humidity 73%
Wind Speed E 20 G 30 mph
Barometer 29.47 in (998.6 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 15 Mar 3:53 am CDT
Extended Forecast for

Union IA

Blizzard Warning March 15, 07:00am until March 16, 07:00am
High Wind Warning March 15, 01:00pm until March 16, 04:00am
Click here for hazard details and duration
Blizzard Warning
High Wind Warning

  • Overnight

    Overnight: A 40 percent chance of rain and thunderstorms. Cloudy, with a low around 36. Southeast wind around 15 mph, with gusts as high as 24 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 36 °F

    Chance Rain

  • Sunday

    Sunday: Rain before 1pm, then rain, snow, and sleet likely between 1pm and 2pm, then snow after 2pm. Some thunder is also possible. Patchy blowing snow after 2pm. Temperature falling to around 30 by 4pm. Very windy, with a south southeast wind 14 to 24 mph becoming north 28 to 38 mph. Winds could gust as high as 50 mph. Chance of precipitation is 90%. New snow and sleet accumulation of around an inch possible.

    High: 38 °F⇓

    Rain and
    Windy then
    Wintry Mix
    and Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Snow, mainly before 1am. Widespread blowing snow. Low around 5. Wind chill values as low as -15. Very windy, with a north northwest wind 34 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 5 °F

    Snow and
    Blowing Snow
    then Snow
    Likely and
    Blowing Snow

  • Monday

    Monday: Widespread blowing snow, mainly before 10am. Cloudy through mid morning, then gradual clearing, with a high near 15. Wind chill values as low as -20. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 40 mph.

    High: 15 °F

    Blowing Snow
    and Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 1. Blustery, with a northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 25 mph.

    Low: 1 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: A 20 percent chance of snow after 1pm. Partly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.

    Low: 21 °F

    Snow Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of rain and thunderstorms. Cloudy, with a low around 36. Southeast wind around 15 mph, with gusts as high as 24 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Rain before 1pm, then rain, snow, and sleet likely between 1pm and 2pm, then snow after 2pm. Some thunder is also possible. Patchy blowing snow after 2pm. Temperature falling to around 30 by 4pm. Very windy, with a south southeast wind 14 to 24 mph becoming north 28 to 38 mph. Winds could gust as high as 50 mph. Chance of precipitation is 90%. New snow and sleet accumulation of around an inch possible.
Sunday Night
Snow, mainly before 1am. Widespread blowing snow. Low around 5. Wind chill values as low as -15. Very windy, with a north northwest wind 34 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Monday
Widespread blowing snow, mainly before 10am. Cloudy through mid morning, then gradual clearing, with a high near 15. Wind chill values as low as -20. Windy, with a northwest wind 25 to 30 mph, with gusts as high as 40 mph.
Monday Night
Mostly clear, with a low around 1. Blustery, with a northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 25 mph.
Tuesday
A 20 percent chance of snow after 1pm. Partly sunny, with a high near 30.
Tuesday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 59.
Thursday Night
Partly cloudy, with a low around 37.
Friday
Partly sunny, with a high near 68.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Union IA
 42.23°N 93.06°W
Last Update:
3:16 am CDT Mar 15, 2026
Forecast Valid:
4am CDT Mar 15, 2026-6pm CDT Mar 21, 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