| National Weather Service Forecast for:
Grinnell IA Issued by: National Weather Service Des Moines, IA |
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| Updated: 10:33 am CDT May 20, 2025 | ||||||||||||||||||
| Grinnell | ||||||||||||||||||
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| This Afternoon |
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 62. West wind 7 to 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
| Tonight |
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 8pm. Mostly cloudy, with a low around 44. West northwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%. |
| Wednesday |
A 30 percent chance of showers, mainly after noon. Partly sunny, with a high near 57. Breezy, with a west northwest wind 16 to 18 mph, with gusts as high as 25 mph. |
| Wednesday Night |
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 43. Northwest wind 10 to 14 mph, with gusts as high as 21 mph. |
| Thursday |
Partly sunny, with a high near 62. North northwest wind 10 to 13 mph, with gusts as high as 20 mph. |
| Thursday Night |
Mostly clear, with a low around 42. |
| Friday |
Mostly sunny, with a high near 67. |
| Friday Night |
A 20 percent chance of showers. Mostly cloudy, with a low around 46. |
| Saturday |
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 66. |
| Saturday Night |
A 40 percent chance of showers. Mostly cloudy, with a low around 47. |
| Sunday |
A 40 percent chance of showers. Partly sunny, with a high near 66. |
| Sunday Night |
A 50 percent chance of showers. Mostly cloudy, with a low around 48. |
| Memorial Day |
A 40 percent chance of showers. Partly sunny, with a high near 66. |
Forecast from NOAA-NWS for Grinnell IA.