National Weather Service Forecast for: Marshalltown IA
Issued by: National Weather Service Des Moines, IA
Updated: 10:44 pm CDT Sep 12, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 53. West northwest wind around 5 mph becoming light and variable.
Partly Cloudy

 Sunday

Sunday: A 40 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 71. Calm wind becoming northeast 5 to 7 mph in the morning.
Chance
Showers

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 54. Calm wind becoming east around 6 mph after midnight.
Partly Cloudy

 Monday

Monday: Showers before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 79. Breezy, with an east southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Showers and
Breezy

 Monday
Night
Monday Night: Showers and possibly a thunderstorm. Low around 66. Breezy, with a south southeast wind 8 to 18 mph becoming west southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers
Likely and
Breezy then
Showers
 Tuesday

Tuesday: Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers

 Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Chance
T-storms then
Showers
Likely
 Wednesday

Wednesday: Showers and possibly a thunderstorm. High near 68. Chance of precipitation is 90%.
Showers

 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm. Low around 61. Chance of precipitation is 80%.
Showers
Lo 53 °F Hi 71 °F Lo 54 °F Hi 79 °F Lo 66 °F Hi 78 °F Lo 58 °F Hi 68 °F Lo 61 °F

 

Overnight
 
 Partly cloudy, with a low around 53. West northwest wind around 5 mph becoming light and variable.
Sunday
 
 A 40 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 71. Calm wind becoming northeast 5 to 7 mph in the morning.
Sunday Night
 
 Partly cloudy, with a low around 54. Calm wind becoming east around 6 mph after midnight.
Monday
 
 Showers before 10am, then showers and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 79. Breezy, with an east southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
 
 Showers and possibly a thunderstorm. Low around 66. Breezy, with a south southeast wind 8 to 18 mph becoming west southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
 
 Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Wednesday
 
 Showers and possibly a thunderstorm. High near 68. Chance of precipitation is 90%.
Wednesday Night
 
 Showers and possibly a thunderstorm. Low around 61. Chance of precipitation is 80%.
Thursday
 
 A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 74.
Thursday Night
 
 A 50 percent chance of showers. Mostly cloudy, with a low around 57.
Friday
 
 A 50 percent chance of showers. Partly sunny, with a high near 75.
Friday Night
 
 A 40 percent chance of showers. Partly cloudy, with a low around 56.
Saturday
 
 Partly sunny, with a high near 72.

 

Forecast from NOAA-NWS for Marshalltown IA.