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

Glasgow, Glasgow Municipal Airport (KGLW)

Lat: 37.03°NLon: 85.95°WElev: 715ft.

Fair

78°F

26°C

Humidity 79%
Wind Speed E 10 G 18 mph
Barometer 30.11 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 Sep 9:55 pm CDT
Extended Forecast for

Mammoth Cave KY

Heat Advisory September 18, 10:10pm until September 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 18, 10:10pm until September 19, 07:00pm

    NOW until 7:00pm Sat

    Heat Advisory

  • Tonight

    Low: 70 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, sunny and hot, with a high near 95. Heat index values as high as 100. Calm wind.

    High: 95 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 95. Calm wind becoming southwest around 5 mph.

    High: 95 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 50%.

    High: 82 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 70. Calm wind.
Saturday
Patchy fog before 7am. Otherwise, sunny and hot, with a high near 95. Heat index values as high as 100. Calm wind.
Saturday Night
Mostly clear, with a low around 71. Calm wind.
Sunday
Mostly sunny and hot, with a high near 95. Calm wind becoming southwest around 5 mph.
Sunday Night
Partly cloudy, with a low around 70. Calm wind.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth Cave KY
 37.21°N 86.06°W (Elev. 702 ft)
Last Update:
9:26 pm CDT Sep 18, 2026
Forecast Valid:
10pm 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