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Extreme Heat Warning EXTREME HEAT WARNING - Jacksonville

NWS Southeast Regional Radar WU South East Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 18-Aug-2026 7:48am  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 82.8, Max: 86.5, Min: 81.5 82.8°F
Warmer 1.1°F than last hour.

Warm

Feels like: 105°F

24-hr difference
31.3°FWarmer 31.3°F than yesterday at this time.
  Today Yesterday
High: 86.5°F
12:00am 		100.2°F
5:23pm
Low: 81.5°F
7:03am 		81.9°F
12:41am
Wind from WSW WSW
2.5
Gust:
 6 mph
1 Bft - Light air
Today: 7.6 mph 12:00am
Gust Month: 30.2 mph August 14
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
This Month: 6.08 in
Season Total: 21.22 in
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 85 % Decreased 1.0% since last hour.
Dew Point: 77.7°F Increased 0.7°F since last hour.
Barometer: 29.62 inHg Rising 0.08 inHg/hr
Baro Trend: Rising Rapidly
Sunrise: 6:54am
Sunset: 8:04pm
Moonrise: 12:49pm
Moonset: 11:28pm
Waxing Crescent
Waxing Crescent, Moon at 6 days in cycle
35%
Illuminated
UV Index Solar Radiation
   1.0     Low 
High: 1.0 @ 7:48am
89 W/m2 (9 %)
High: 89 @  7:48am
 NWS Weather Forecast  - Outlook: Today & Tonight
Today

Today: Mostly Sunny then Showers And Thunderstorms Likely
Mostly Sunny then Showers And T-Storms Likely

Hi 97 °F		 NWS forecast: Showers and thunderstorms likely after 1pm. Mostly sunny. High near 97, with temperatures falling to around 96 in the afternoon. Heat index values as high as 111. West wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
 
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Lo 78 °F		 NWS forecast: A chance of showers and thunderstorms before 1am. Mostly cloudy. Low around 78, with temperatures rising to around 79 overnight. Heat index values as high as 107. West wind 8 to 12 mph, with gusts as high as 17 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.