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

85°F

29°C

Humidity 71%
Wind Speed S 16 G 25 mph
Barometer 29.81 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 29 Jun 11:15 am CDT
Extended Forecast for

3 Miles WSW Tama IA

Extreme Heat Warning June 29, 11:35am until June 30, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 11:35am until June 30, 09:00pm

    NOW until 9:00pm Tue

    Extreme Heat Warning

  • Today

    High: 94 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 77. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 29 mph.

    Low: 77 °F

    Mostly Clear
    and Breezy
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 95. Heat index values as high as 105. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 95 °F

    Mostly Sunny
    then Becoming
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 74. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 94. Breezy, with a south southwest wind 9 to 17 mph, with gusts as high as 28 mph.

    High: 94 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 75. New precipitation amounts of less than a tenth of an inch possible.

    Low: 75 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 94. Heat index values as high as 106. Breezy, with a south wind 17 to 20 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around 77. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 29 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 95. Heat index values as high as 105. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 24 mph.
Tuesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 74. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 94. Breezy, with a south southwest wind 9 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 75. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
Mostly sunny, with a high near 92.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 71.
Independence Day
Mostly sunny, with a high near 91.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Sunday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Tama IA
 41.95°N 92.63°W
Last Update:
10:22 am CDT Jun 29, 2026
Forecast Valid:
11am CDT Jun 29, 2026-6pm CDT Jul 5, 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