Hazardous Weather Conditions
Current conditions at
Grinnell Municipal Airfield (KGGI)
Lat: 41.71°NLon: 92.73°WElev: 1007ft.N/A
| Humidity | NA |
| Wind Speed | NA |
| Barometer | NA |
| Dewpoint | N/A |
| Visibility | NA |
| Last update | *** Not a current observation *** |
Extended Forecast for
Grinnell IA
Flood Watch August 13, 03:43pm until August 15, 10:00am
NOW until 10:00am Sat

Flood Watch
This Afternoon

High: 77 °F
Chance
T-stormsTonight

Low: 66 °F
T-storms
LikelyFriday
High: 84 °F
Showers
Likely then
Chance
T-stormsFriday Night
Low: 70 °F
Chance
T-storms then
Heavy RainSaturday
High: 87 °F
Slight Chance
T-storms then
Slight Chance
ShowersSaturday Night
Low: 68 °F
Slight Chance
T-storms then
Showers
LikelySunday

High: 82 °F
Chance
T-stormsSunday Night

Low: 61 °F
Partly Cloudy
Detailed Forecast
This Afternoon
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 77. East wind around 9 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 66. East wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Showers and thunderstorms likely, mainly before 11am. Mostly cloudy, with a high near 84. East southeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms likely, mainly before 2am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 70. East wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 87. South wind around 7 mph becoming west northwest in the afternoon. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Grinnell IA
41.75°N 92.75°W
41.75°N 92.75°W
3:36 pm CDT Aug 13, 2026
3pm CDT Aug 13, 2026-6pm CDT Aug 19, 2026



