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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

Fair

66°F

19°C

Humidity 83%
Wind Speed SE 7 mph
Barometer 30.07 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 29 Aug 2:55 am CDT
Extended Forecast for

Marysville IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 66. South wind around 6 mph.

    Low: 66 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Partly sunny, with a high near 87. Breezy, with a south wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers then
    Partly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 75. South wind 11 to 14 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before noon. Mostly sunny, with a high near 92. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.

    High: 92 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 78. South wind around 11 mph, with gusts as high as 21 mph.

    Low: 78 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 66. South wind around 6 mph.
Saturday
A chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Partly sunny, with a high near 87. Breezy, with a south wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 75. South wind 11 to 14 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of showers and thunderstorms before noon. Mostly sunny, with a high near 92. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 78. South wind around 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 93.
Monday Night
Partly cloudy, with a low around 77.
Tuesday
Mostly sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Mostly sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Mostly sunny, with a high near 92.
Thursday Night
Partly cloudy, with a low around 74.
Friday
Partly sunny, with a high near 90.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marysville IA
 41.19°N 92.96°W
Last Update:
1:26 am CDT Aug 29, 2026
Forecast Valid:
3am CDT Aug 29, 2026-6pm CDT Sep 4, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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