Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11° N Lon: 92.92° W Elev: 971 ft.

Fair

69°F

21°C

Humidity 70%
Wind Speed NE 3 mph
Barometer 30.07 in (1017.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 22 Jun 9:53 am CDT
Detailed forecast for

Grundy County

Rest Of Today
Patchy fog early this morning. Mostly sunny. Highs in the upper 70s. Northeast winds around 5 mph.
Tonight
Partly cloudy. Lows in the mid 50s. Southeast winds around 5 mph.
Tuesday
Mostly sunny in the morning, then becoming mostly cloudy. Highs in the upper 70s. South winds 5 to 10 mph.
Tuesday Night
Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows around 60. South winds 5 to 10 mph. Chance of rain 50 percent.
Wednesday
Mostly sunny. Highs around 80. West winds 5 to 10 mph.
Wednesday Night
Partly cloudy. Lows in the mid 50s.
Thursday
Mostly sunny. Highs in the mid 70s.
Thursday Night
Mostly clear. Lows in the mid 50s.
Friday
Mostly sunny. Highs in the upper 70s.
Friday Night
Mostly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 60. Chance of rain 20 percent.
Saturday
Mostly sunny. Highs in the lower 80s.
Saturday Night
Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 40 percent.
Sunday
Mostly sunny. A slight chance of showers and thunderstorms in the morning. Breezy with highs in the upper 80s. Chance of rain 20 percent.



Basemap Options
Click map to change the forecast location
Loading map...
853 AM CDT Mon Jun 22 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database