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.

Overcast

66°F

19°C

Humidity 95%
Wind Speed S 5 mph
Barometer 30.03 in
Dewpoint 65°F (18°C)
Visibility 7.00 mi
Last update 25 Jul 1:15 am CDT
Extended Forecast for

Tama IA

Extreme Heat Watch July 26, 12:00pm until July 27, 10:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Overnight

    Overnight: A slight chance of drizzle before 3am. Patchy fog. Otherwise, cloudy, with a low around 64. Light south wind.

    Low: 64 °F

    Slight Chance
    Drizzle and
    Patchy Fog

  • Saturday

    Saturday: Areas of fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 89. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 89 °F

    Areas Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 70. South southwest wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 94. Heat index values as high as 109. South southwest wind 3 to 8 mph.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 7 to 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Partly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of drizzle before 3am. Patchy fog. Otherwise, cloudy, with a low around 64. Light south wind.
Saturday
Areas of fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 89. Calm wind becoming south southwest around 5 mph in the afternoon.
Saturday Night
Increasing clouds, with a low around 70. South southwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 94. Heat index values as high as 109. South southwest wind 3 to 8 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 7 to 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Mostly sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tama IA
 41.97°N 92.57°W
Last Update:
9:43 pm CDT Jul 24, 2026
Forecast Valid:
1am CDT Jul 25, 2026-6pm CDT Jul 31, 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