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

Dangerous Heat to Continue through the Holiday Weekend; Severe Storms on Friday from the Plains to the Mid-Atlantic

Dangerous, record-breaking heat will continue across most of the central and eastern U.S through Friday then focusing across the eastern U.S. through the Independence Day holiday weekend. Peak heat indices of up to 115 degrees are possible. Isolated to scattered severe thunderstorms are possible from the northern/central Plains into the Midwest, Ohio Valley, and Mid-Atlantic Friday. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

Overcast and Breezy

75°F

24°C

Humidity 74%
Wind Speed NE 23 G 30 mph
Barometer 30.04 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 2 Jul 10:15 pm CDT
Extended Forecast for

Swan IA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 72. East southeast wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly sunny, with a high near 91. Heat index values as high as 101. South southeast wind 6 to 10 mph becoming west in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 3am, then showers and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Low around 71. South wind around 8 mph becoming east after midnight. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 71 °F

    Chance
    T-storms then
    Heavy Rain

  • Independence Day

    Independence Day: A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. South wind around 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Northwest wind 3 to 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 72. East southeast wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly sunny, with a high near 91. Heat index values as high as 101. South southeast wind 6 to 10 mph becoming west in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms before 3am, then showers and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Low around 71. South wind around 8 mph becoming east after midnight. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Independence Day
A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. South wind around 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Northwest wind 3 to 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Partly cloudy, with a low around 66.
Monday
Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 69.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Swan IA
 41.47°N 93.31°W
Last Update:
10:17 pm CDT Jul 2, 2026
Forecast Valid:
10pm CDT Jul 2, 2026-6pm CDT Jul 9, 2026
 
Forecast Discussion
 
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Additional Resources

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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