National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

46°F

8°C

Humidity 52%
Wind Speed E 17 G 24 mph
Barometer 29.83 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 14 Mar 6:15 pm CDT
Extended Forecast for

Grinnell IA

Blizzard Warning March 15, 01:00pm until March 16, 07:00am
High Wind Warning March 15, 01:00pm until March 16, 04:00am
Click here for hazard details and duration
Blizzard Warning
High Wind Warning

  • Tonight

    Tonight: A slight chance of rain between 3am and 4am, then a chance of rain and thunderstorms after 4am. Increasing clouds, with a temperature falling to near 43 by 10pm, then rising to around 49 during the remainder of the night. Breezy, with an east southeast wind 16 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F⇑

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: Rain, snow, and sleet before 3pm, then snow, possibly mixed with rain. Some thunder is also possible. Patchy blowing snow after 4pm. Temperature rising to near 52 by 8am, then falling to around 31 during the remainder of the day. Very windy, with a south wind 16 to 26 mph becoming north northwest 27 to 37 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 100%. New snow and sleet accumulation of less than one inch possible.

    High: 52 °F⇓

    Rain and
    Windy then
    Wintry Mix
    and Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Snow, mainly before 1am. Widespread blowing snow, mainly after 8pm. Low around 7. Wind chill values as low as -15. Very windy, with a northwest wind 34 to 39 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 7 °F

    Snow and
    Blowing Snow

  • Monday

    Monday: Areas of blowing snow. Cloudy, then gradually becoming mostly sunny, with a high near 16. Wind chill values as low as -15. Windy, with a northwest wind 25 to 31 mph, with gusts as high as 41 mph.

    High: 16 °F

    Areas Blowing
    Snow and
    Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 2. Blustery, with a northwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 29 mph.

    Low: 2 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: A 20 percent chance of snow after 1pm. Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.

    Low: 23 °F

    Snow Likely

  • Wednesday

    Wednesday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of rain between 3am and 4am, then a chance of rain and thunderstorms after 4am. Increasing clouds, with a temperature falling to near 43 by 10pm, then rising to around 49 during the remainder of the night. Breezy, with an east southeast wind 16 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Rain, snow, and sleet before 3pm, then snow, possibly mixed with rain. Some thunder is also possible. Patchy blowing snow after 4pm. Temperature rising to near 52 by 8am, then falling to around 31 during the remainder of the day. Very windy, with a south wind 16 to 26 mph becoming north northwest 27 to 37 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 100%. New snow and sleet accumulation of less than one inch possible.
Sunday Night
Snow, mainly before 1am. Widespread blowing snow, mainly after 8pm. Low around 7. Wind chill values as low as -15. Very windy, with a northwest wind 34 to 39 mph, with gusts as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Monday
Areas of blowing snow. Cloudy, then gradually becoming mostly sunny, with a high near 16. Wind chill values as low as -15. Windy, with a northwest wind 25 to 31 mph, with gusts as high as 41 mph.
Monday Night
Mostly clear, with a low around 2. Blustery, with a northwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 29 mph.
Tuesday
A 20 percent chance of snow after 1pm. Partly sunny, with a high near 30.
Tuesday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.
Wednesday
Sunny, with a high near 49.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Mostly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
6:12 pm CDT Mar 14, 2026
Forecast Valid:
6pm CDT Mar 14, 2026-6pm CDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation