Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Overcast

42°F

6°C

Humidity 76%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 34°F (1°C)
Visibility 7.00 mi
Last update 3 Mar 6:15 pm CST
Extended Forecast for

Sully IA

  • Tonight

    Tonight: A slight chance of drizzle after 4am.  Mostly cloudy, with a low around 34. Northeast wind 3 to 6 mph.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance
    Drizzle

  • Wednesday

    Wednesday: A chance of drizzle, mainly after 4pm.  Mostly cloudy, with a high near 49. Northeast wind around 6 mph becoming calm  in the afternoon.

    High: 49 °F

    Chance
    Drizzle

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after midnight.  Patchy dense fog after 9pm.  Otherwise, cloudy, with a low around 39. Calm wind.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Showers
    Likely and
    Patchy Dense
    Fog

  • Thursday

    Thursday: A 20 percent chance of showers before noon.  Areas of fog before 10am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 61. Calm wind becoming south around 6 mph in the afternoon.

    High: 61 °F

    Slight Chance
    Showers and
    Areas Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm after midnight.  Mostly cloudy, with a low around 46. Southeast wind 5 to 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Mostly Clear
    then Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm.  High near 69. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 69 °F

    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm before midnight, then a chance of rain.  Low around 39. Chance of precipitation is 80%.

    Low: 39 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of drizzle after 4am. Mostly cloudy, with a low around 34. Northeast wind 3 to 6 mph.
Wednesday
A chance of drizzle, mainly after 4pm. Mostly cloudy, with a high near 49. Northeast wind around 6 mph becoming calm in the afternoon.
Wednesday Night
Showers likely, mainly after midnight. Patchy dense fog after 9pm. Otherwise, cloudy, with a low around 39. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A 20 percent chance of showers before noon. Areas of fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 61. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 46. Southeast wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and possibly a thunderstorm. High near 69. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain and possibly a thunderstorm before midnight, then a chance of rain. Low around 39. Chance of precipitation is 80%.
Saturday
Mostly sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 63.
Sunday Night
Mostly clear, with a low around 40.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 48.
Tuesday
A 40 percent chance of rain. Partly sunny, with a high near 66. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
5:26 pm CST Mar 3, 2026
6pm CST Mar 3, 2026-6pm CDT Mar 10, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database