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.

Light Snow and Breezy

10°F

-12°C

Humidity 77%
Wind Speed NW 22 G 31 mph
Barometer 30.15 in
Dewpoint 4°F (-16°C)
Visibility 0.75 mi
Wind Chill-10°F (-23°C)
Last update 17 Jan 2:55 pm CST
Extended Forecast for

Deep River IA

Cold Weather Advisory January 18, 09:00pm until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • This Afternoon

    This Afternoon: A 20 percent chance of snow before 5pm. Patchy blowing snow before 5pm. Cloudy, with a steady temperature around 12. Wind chill values as low as -5. Windy, with a northwest wind 17 to 21 mph, with gusts as high as 29 mph.

    High: 12 °F

    Slight Chance
    Snow and
    Patchy
    Blowing Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around 6. Wind chill values as low as -5. Blustery, with a northwest wind 8 to 16 mph becoming southwest after midnight. Winds could gust as high as 24 mph.

    Low: 6 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Sunday

    Sunday: A slight chance of snow before 10am, then a chance of snow after noon. Mostly cloudy, with a high near 26. Wind chill values as low as -5. Windy, with a southwest wind 11 to 16 mph becoming northwest 19 to 24 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 26 °F

    Chance Snow
    and Windy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 0. Wind chill values as low as -20. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 39 mph.

    Low: 0 °F

    Mostly Cloudy
    and Windy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 14. Blustery, with a northwest wind 10 to 18 mph, with gusts as high as 29 mph.

    High: 14 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 5.

    Low: 5 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of snow before 5pm. Patchy blowing snow before 5pm. Cloudy, with a steady temperature around 12. Wind chill values as low as -5. Windy, with a northwest wind 17 to 21 mph, with gusts as high as 29 mph.
Tonight
Mostly cloudy, with a low around 6. Wind chill values as low as -5. Blustery, with a northwest wind 8 to 16 mph becoming southwest after midnight. Winds could gust as high as 24 mph.
Sunday
A slight chance of snow before 10am, then a chance of snow after noon. Mostly cloudy, with a high near 26. Wind chill values as low as -5. Windy, with a southwest wind 11 to 16 mph becoming northwest 19 to 24 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly cloudy, with a low around 0. Wind chill values as low as -20. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 39 mph.
M.L.King Day
Mostly sunny, with a high near 14. Blustery, with a northwest wind 10 to 18 mph, with gusts as high as 29 mph.
Monday Night
Mostly clear, with a low around 5.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Mostly cloudy, with a low around 20.
Wednesday
Partly sunny, with a high near 29.
Wednesday Night
Mostly cloudy, with a low around 13.
Thursday
Mostly sunny, with a high near 24.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Deep River IA
 41.57°N 92.37°W
Last Update:
2:12 pm CST Jan 17, 2026
Forecast Valid:
3pm CST Jan 17, 2026-6pm CST Jan 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation