Weather forecast for: Grimes IA
Last Update: 6:11 am CDT Sep 14, 2026
Today: Showers and thunderstorms, mainly before 1pm. High near 79. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9pm. Some of the storms could produce heavy rainfall. Low around 65. Breezy, with a south southeast wind 8 to 16 mph becoming west southwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Tuesday: Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 1pm. Some of the storms could produce heavy rainfall. High near 71. North wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly clear, then becoming cloudy toward daybreak, with a low around 59. East northeast wind 3 to 7 mph. New rainfall amounts between a quarter and half of an inch possible.
Wednesday: Showers and possibly a thunderstorm before 1pm, then showers likely between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. High near 70. East wind 6 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night: Showers and possibly a thunderstorm. Low around 63. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Thursday: Showers likely and possibly a thunderstorm before 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64.
Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 79. Chance of precipitation is 60%.
Friday Night: Showers likely, mainly after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 70%.
Saturday: A 50 percent chance of showers. Partly sunny, with a high near 76.
Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Sunday: A 40 percent chance of showers. Partly sunny, with a high near 72.
WeatherWorld.com
