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National Weather Service Flood Inundation Mapping Available for Iowa in September 2025

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Rain

55°F

13°C

Humidity	97%
Wind Speed	N 9 mph
Barometer	30.17 in
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Wind Chill	53°F (12°C)
Last update	6 Oct 11:35 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles ESE Grinnell Regional Airport IA

Today
High: 59 °F
Showers
Likely
Tonight
Low: 48 °F
Showers
Likely
Tuesday
High: 67 °F
Sunny
Tuesday Night
Low: 42 °F
Clear
Wednesday
High: 68 °F
Sunny
Wednesday Night
Low: 43 °F
Clear
Thursday
High: 70 °F
Sunny
Thursday Night
Low: 51 °F
Chance
Showers
Friday
High: 74 °F
Mostly Sunny

Detailed Forecast

Today

Showers likely, with thunderstorms also possible after 4pm. Cloudy, with a steady temperature around 59. North wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms likely before 1am, then a chance of showers. Mostly cloudy, with a low around 48. North wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday

Sunny, with a high near 67. North wind around 7 mph.

Tuesday Night

Clear, with a low around 42. Calm wind.

Wednesday

Sunny, with a high near 68. Light and variable wind.

Wednesday Night

Clear, with a low around 43.

Thursday

Sunny, with a high near 70.

Thursday Night

A 30 percent chance of showers. Partly cloudy, with a low around 51.