| National Weather Service Forecast for:
Grinnell IA Issued by: National Weather Service Des Moines, IA |
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| Updated: 10:44 pm CDT Apr 15, 2026 | ||||||||||||||||||
| Grinnell | ||||||||||||||||||
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| Overnight |
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 3am. Mostly cloudy, with a low around 51. West wind around 9 mph. Chance of precipitation is 20%. |
| Thursday |
Sunny, with a high near 74. West wind 6 to 8 mph becoming south in the afternoon. |
| Thursday Night |
Mostly clear, with a low around 54. South wind 6 to 10 mph, with gusts as high as 18 mph. |
| Friday |
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 76. Windy, with a south wind 13 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible. |
| Friday Night |
Showers and thunderstorms likely before 1am, then a chance of showers. Mostly cloudy, with a low around 35. Breezy, with a southwest wind around 17 mph becoming north northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible. |
| Saturday |
A 10 percent chance of showers before 7am. Sunny, with a high near 49. Breezy. |
| Saturday Night |
Mostly clear, with a low around 30. |
| Sunday |
Sunny, with a high near 56. |
| Sunday Night |
Mostly clear, with a low around 35. |
| Monday |
Sunny, with a high near 68. Breezy. |
| Monday Night |
Mostly clear, with a low around 49. |
| Tuesday |
Sunny, with a high near 72. |
| Tuesday Night |
Mostly clear, with a low around 48. |
| Wednesday |
Mostly sunny, with a high near 70. |
Forecast from NOAA-NWS for Grinnell IA.