Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

44°F

7°C

Humidity 92%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 20 May 2:55 am CDT
Extended Forecast for

Grinnell Regional Airport IA

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 45. Light north northwest wind.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 62. Light north wind becoming north northeast 5 to 10 mph in the morning.

    High: 62 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 45. East northeast wind 3 to 8 mph.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers between 9am and noon.  Mostly cloudy, with a high near 63. East wind 10 to 13 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.

    High: 63 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 50 percent chance of showers, mainly after 1am.  Cloudy, with a low around 47. East wind 11 to 14 mph, with gusts as high as 20 mph.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 47 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Friday

    Friday: Showers likely.  Mostly cloudy, with a high near 61. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 61 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers, mainly before 1am.  Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 45. Light north northwest wind.
Wednesday
Increasing clouds, with a high near 62. Light north wind becoming north northeast 5 to 10 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 45. East northeast wind 3 to 8 mph.
Thursday
A slight chance of showers between 9am and noon. Mostly cloudy, with a high near 63. East wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Thursday Night
A 50 percent chance of showers, mainly after 1am. Cloudy, with a low around 47. East wind 11 to 14 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 72.
Saturday Night
Mostly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 54.
Memorial Day
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell Regional Airport IA
 41.71°N 92.75°W
2:52 am CDT May 20, 2026
3am CDT May 20, 2026-6pm CDT May 26, 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