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

Hazardous Weather Conditions

Current conditions at

Jacksonville International Airport (KJAX)

Lat: 30.5°NLon: 81.69°WElev: 23ft.

Mostly Cloudy

95°F

35°C

Humidity 53%
Wind Speed SW 7 mph
Barometer 30.05 in (1017.7 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 16 Aug 2:56 pm EDT
Extended Forecast for

Callahan FL

Heat Advisory August 17, 11:00am until August 17, 08:00pm
Heat Advisory August 16, 03:07pm until August 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
Heat Advisory
  •  
    Heat Advisory August 16, 03:07pm until August 16, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 97 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 3am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 76. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 110. West wind 5 to 7 mph.

    High: 96 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 77. Southwest wind 5 to 7 mph.

    Low: 77 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 98. West wind 5 to 7 mph.

    High: 98 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77.

    Low: 77 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Partly sunny and hot, with a high near 97. Heat index values as high as 110. West wind around 8 mph.
Tonight
A chance of showers and thunderstorms before 3am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 76. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 110. West wind 5 to 7 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 77. Southwest wind 5 to 7 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 98. West wind 5 to 7 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77.
Wednesday
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 76.
Thursday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 96.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 76.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 94. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Callahan FL
 30.56°N 81.83°W
Last Update:
2:21 pm EDT Aug 16, 2026
Forecast Valid:
3pm EDT Aug 16, 2026-6pm EDT Aug 22, 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