| National Weather Service Forecast for:
Grinnell IA Issued by: National Weather Service Des Moines, IA |
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| Updated: 2:47 pm CDT Oct 17, 2026 | ||||||||||||||||||
| Grinnell | ||||||||||||||||||
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| Tonight |
Clear, with a low around 39. South wind 7 to 9 mph. |
| Sunday |
Sunny, with a high near 66. South southwest wind 9 to 13 mph, with gusts as high as 22 mph. |
| Sunday Night |
Clear, with a low around 40. South wind 3 to 8 mph. |
| Monday |
Sunny, with a high near 67. South wind 3 to 6 mph. |
| Monday Night |
Mostly clear, with a low around 43. Light south southeast wind. |
| Tuesday |
Sunny, with a high near 68. |
| Tuesday Night |
Partly cloudy, with a low around 48. |
| Wednesday |
Sunny, with a high near 72. |
| Wednesday Night |
Partly cloudy, with a low around 52. |
| Thursday |
Sunny, with a high near 74. |
| Thursday Night |
Mostly clear, with a low around 52. |
| Friday |
Mostly sunny, with a high near 74. |
| Friday Night |
Partly cloudy, with a low around 55. |
| Saturday |
Mostly sunny, with a high near 74. |
Forecast from NOAA-NWS for Grinnell IA.