National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

A Few Clouds

77°F

25°C

Humidity 83%
Wind Speed SW 3 mph
Barometer 29.95 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 1 Sep 3:35 am CDT
Extended Forecast for

Swan IA

Heat Advisory September 1, 03:48am until September 2, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 1, 03:48am until September 2, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Overnight

    Low: 77 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. Heat index values as high as 100. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 95 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. South southwest wind 5 to 9 mph.

    Low: 77 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 100. Southwest wind 7 to 11 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South wind 5 to 8 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 95.

    High: 95 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 77. Calm wind.
Tuesday
Mostly sunny, with a high near 95. Heat index values as high as 100. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 77. South southwest wind 5 to 9 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 100. Southwest wind 7 to 11 mph.
Wednesday Night
Mostly clear, with a low around 77. South wind 5 to 8 mph.
Thursday
Mostly sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 78.
Friday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 75.
Saturday
Mostly sunny and hot, with a high near 97.
Saturday Night
Partly cloudy, with a low around 73.
Sunday
Mostly sunny, with a high near 93.
Sunday Night
Partly cloudy, with a low around 69.
Labor Day
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Swan IA
 41.47°N 93.31°W
Last Update:
3:17 am CDT Sep 1, 2026
Forecast Valid:
3am CDT Sep 1, 2026-6pm CDT Sep 7, 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