Grinnell, Iowa Weather
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Weather Forecast for Grinnell, Iowa : Poweshiek County
Issued: 4:35 pm CDT Aug 2, 2025 Latitude: 41.7430494 Longitude: -92.7224124 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Smoke on Tonight Smoke on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday Mostly Sunny on Wednesday Sunny on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday
Low: 54°F High: 76°F High: 78°F High: 81°F High: 85°F High: 87°F High: 88°F High: 87°F
Low: 55°F Low: 60°F Low: 63°F Low: 66°F Low: 69°F Low: 70°F  
Smoke Smoke Mostly Sunny Mostly Sunny Mostly Sunny Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
NEWTON MUNICIPAL - (KTNU)
77°
Mostly Clear
as of 4:55 PM CDST
Rel. Humidity: 57%
Dew Point: 61°F
Visibility: 9 Miles
Pressure: 30.27 in.
Flight Rule: VFR
Wind Data
7 MPH
150° Southeast
Cloud Level(s): Few at 4400ft
Current Conditions at
PELLA MUNI AP - (KPEA)
75°
Clear
as of 4:55 PM CDST
Rel. Humidity: 57%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.28 in.
Flight Rule: VFR
Wind Data
6 MPH
110° East
Cloud Level(s): Clear
Current Conditions at
MARSHALLTOWN ARPT - (KMIW)
75°
Mostly Clear
as of 4:53 PM CDST
Rel. Humidity: 57%
Dew Point: 59°F
Visibility: 7 Miles
Pressure: 30.28 in.
Flight Rule: VFR
Wind Data
8 MPH
140° Southeast
Cloud Level(s): Few at 4300ft
Current Conditions at
KNOXVILLE - (KOXV)
75°
Clear
as of 4:55 PM CDST
Rel. Humidity: 53%
Dew Point: 57°F
Visibility: 9 Miles
Pressure: 30.27 in.
Flight Rule: VFR
Wind Data
8 MPH
120° Southeast
Cloud Level(s): Clear
Smoke on Tonight Tonight... Areas of smoke. Mostly cloudy, with a low around 54. East southeast wind around 6 mph becoming calm in the evening.

Smoke on Sunday Sunday... Areas of smoke before 9am. Mostly sunny, with a high near 76. Calm wind becoming south southeast around 6 mph in the morning.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 55. Calm wind.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 78. Calm wind becoming southeast around 5 mph.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 60. Calm wind.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 81.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 63.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 85.

Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 66.

Sunny on Thursday Thursday... Sunny, with a high near 87.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 69.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 88.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 70.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 87.

Current Radar Image


Sun Almanac for Grinnell, Iowa
Sunrise: 06:07 AM
Sunset: 8:28 PM
Civil Sunrise:05:36 AM
Civil Sunset: 8:59 PM
Nautical Sunrise: 04:57 AM
Nautical Sunset: 9:37 PM
Astro Sunrise: 04:14 AM
Astro Sunset: 10:20 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.