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 Details for Jacksonville Heat Advisory  +2 additional alerts

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Heat Advisory HEAT ADVISORY - Jacksonville

NWS Southeast Regional Radar WU South East Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 20-Aug-2026 3:47pm  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 93.6, Max: 97.0, Min: 77.9 93.6°F
Colder 1.9°F than last hour.

Heat Danger

Feels like: 117°F

24-hr difference
27°FWarmer 27.0°F than yesterday at this time.
  Today Yesterday
High: 97°F
3:14pm 		99.9°F
2:52pm
Low: 77.9°F
6:02am 		77.9°F
5:22am
Wind from NE NE
4.3
Gust:
 7.8 mph
1 Bft - Light air
Today: 8.1 mph 10:19am
Gust Month: 30.2 mph August 14
Rain Today: 0.01 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0.01 in
This Month: 6.09 in
Season Total: 21.24 in
Tonight

Tonight: Showers And Thunderstorms Likely then Partly Cloudy
Showers And T-Storms Likely then Partly Cloudy
Humidity & Barometer Almanac Moon
Humidity: 62 % Increased 7.0% since last hour.
Dew Point: 78.6°F Increased 1.8°F since last hour.
Barometer: 29.82 inHg Falling 0.15 inHg/hr
Baro Trend: Falling Rapidly
Sunrise: 6:56am
Sunset: 8:02pm
Moonset: 12:05am
Moonrise: 2:46pm
Waxing Gibbous
Waxing Gibbous, Moon at 8 days in cycle
57%
Illuminated
UV Index Solar Radiation
   7.8     High 
High: 10.5 @ 2:47pm
734 W/m2 (72 %)
High: 992 @  2:47pm
 NWS Weather Forecast  - Outlook: This Afternoon & Tonight
This
Afternoon
This Afternoon: Showers And Thunderstorms Likely
Showers And T-Storms Likely

Hi 98 °F		 NWS forecast: Showers and thunderstorms likely. Mostly cloudy. High near 98, with temperatures falling to around 90 in the afternoon. Heat index values as high as 111. South wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
 
Tonight

Tonight: Showers And Thunderstorms Likely then Partly Cloudy
Showers And T-Storms Likely then Partly Cloudy

Lo 77 °F		 NWS forecast: Showers and thunderstorms likely before 9pm. Partly cloudy. Low around 77, with temperatures rising to around 78 overnight. Southwest wind 3 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.