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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Guntersville Municipal Airport (K8A1)

Lat: 34.4°NLon: 86.27°WElev: 600ft.

Fair

97°F

36°C

Humidity 39%
Wind Speed W 7 mph
Barometer 30.07 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 18 Sep 3:55 pm CDT
Extended Forecast for

Guntersville AL

Heat Advisory September 18, 04:09pm until September 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 18, 04:09pm until September 19, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 94 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Sunny, with a high near 95. Heat index values as high as 105. Calm wind.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 74. Calm wind.

    Low: 74 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 93. Calm wind.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92.

    High: 92 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. Heat index values as high as 105. Calm wind.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 75. Calm wind.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Sunny, with a high near 95. Heat index values as high as 105. Calm wind.
Saturday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 74. Calm wind.
Sunday
Sunny, with a high near 93. Calm wind.
Sunday Night
Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92.
Monday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Tuesday Night
A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 64.
Friday
Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guntersville AL
 34.36°N 86.26°W (Elev. 968 ft)
Last Update:
3:50 pm CDT Sep 18, 2026
Forecast Valid:
4pm CDT Sep 18, 2026-6pm CDT Sep 25, 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