50158 Weather (Marshalltown, IA)

Weather forecast for: Marshalltown IA

Last Update: 10:47 pm CDT Sep 16, 2026

Overnight: A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could produce heavy rainfall. Patchy fog. Otherwise, cloudy, with a low around 63. East southeast wind around 5 mph becoming calm. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Areas of fog before noon. Otherwise, cloudy, with a high near 74. Calm wind becoming north northeast around 5 mph in the afternoon. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night: A chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 64. Northeast wind 5 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: Showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 1pm. High near 80. East wind 7 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. South southwest wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: A 40 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 80. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.

Sunday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 67. Chance of precipitation is 60%.

Sunday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

Monday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 66.

Monday Night: Mostly cloudy, with a low around 56.

Tuesday: Mostly cloudy, with a high near 68.

Tuesday Night: Partly cloudy, with a low around 56.

Wednesday: Partly sunny, with a high near 70.