National Weather Service Forecast for: Marshalltown IA
Issued by: National Weather Service Des Moines, IA
Updated: 3:37 am CDT Jun 22, 2026
 
Today

Today: Mostly sunny, with a high near 78. North wind 3 to 5 mph.
Mostly Sunny

 Tonight

Tonight: Mostly clear, with a low around 55. Calm wind.
Mostly Clear

 Tuesday

Tuesday: Increasing clouds, with a high near 79. Calm wind becoming south 5 to 8 mph in the afternoon.
Increasing
Clouds
 Tuesday
Night
Tuesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 61. South wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms
 Wednesday

Wednesday: A chance of thunderstorms before 7am. Mostly sunny, with a high near 82. West northwest wind 5 to 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 57.
Partly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 78.
Mostly Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 56.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 79.
Mostly Sunny
Hi 78 °F Lo 55 °F Hi 79 °F Lo 61 °F Hi 82 °F Lo 57 °F Hi 78 °F Lo 56 °F Hi 79 °F

 

Today
 
 Mostly sunny, with a high near 78. North wind 3 to 5 mph.
Tonight
 
 Mostly clear, with a low around 55. Calm wind.
Tuesday
 
 Increasing clouds, with a high near 79. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
 
 A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 61. South wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 A chance of thunderstorms before 7am. Mostly sunny, with a high near 82. West northwest wind 5 to 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Partly cloudy, with a low around 57.
Thursday
 
 Mostly sunny, with a high near 78.
Thursday Night
 
 Partly cloudy, with a low around 56.
Friday
 
 Mostly sunny, with a high near 79.
Friday Night
 
 Mostly cloudy, with a low around 60.
Saturday
 
 Mostly sunny, with a high near 83.
Saturday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday
 
 Mostly sunny, with a high near 90. Breezy.

 

Forecast from NOAA-NWS for Marshalltown IA.