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

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

81°F

27°C

Humidity	48%
Wind Speed	S 17 G 23 mph
Barometer	29.96 in
Dewpoint	59°F (15°C)
Visibility	10.00 mi
Heat Index	81°F (27°C)
Last update	4 Oct 5:55 pm CDT

More Information:

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

Extended Forecast for

2 Miles SW Chelsea IA

Tonight
Low: 62 °F
Clear
Sunday
High: 87 °F
Sunny and
Breezy
Sunday Night
Low: 57 °F
Chance
Showers then
Showers
Likely
Monday
High: 66 °F
Showers
Likely
Monday Night
Low: 49 °F
Chance
Showers
Tuesday
High: 66 °F
Mostly Sunny
Tuesday Night
Low: 42 °F
Mostly Clear
Wednesday
High: 68 °F
Sunny
Wednesday Night
Low: 45 °F
Mostly Clear

Detailed Forecast

Tonight

Clear, with a low around 62. South wind 10 to 14 mph, with gusts as high as 25 mph.

Sunday

Sunny, with a high near 87. Breezy, with a south wind 13 to 20 mph, with gusts as high as 31 mph.

Sunday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 57. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 66. North wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Monday Night

A chance of showers, with thunderstorms also possible after 10pm. Mostly cloudy, with a low around 49. North wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday

Mostly sunny, with a high near 66.

Tuesday Night

Mostly clear, with a low around 42.

Wednesday

Sunny, with a high near 68.

Wednesday Night

Mostly clear, with a low around 45.

Thursday

Mostly sunny, with a high near 73.

Thursday Night

Partly cloudy, with a low around 55.