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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 6:03am  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 82.0, Max: 86.5, Min: 82.0 82°F
Colder 0.6°F than last hour.

Warm

Feels like: 104°F

24-hr difference
31.8°FWarmer 31.8°F than yesterday at this time.
  Today Yesterday
High: 86.5°F
12:00am 		100.2°F
5:23pm
Low: 82°F
6:00am 		81.9°F
12:41am
Wind from SSW SSW
2.2
Gust:
 4.3 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
Tuesday

Tuesday: Mostly Sunny then Showers And Thunderstorms Likely
Mostly Sunny then Showers And T-Storms Likely
Humidity & Barometer Almanac Moon
Humidity: 85 %  
Dew Point: 77°F Decreased 0.5°F since last hour.
Barometer: 29.54 inHg Falling 0.01 inHg/hr
Baro Trend: Steady
Sunrise: 6:54am
Sunset: 8:04pm
Moonrise: 12:49pm
Moonset: 11:28pm
Waxing Crescent
Waxing Crescent, Moon at 6 days in cycle
34%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 0.0 @ 12:00am
0 W/m2 (0 %)
High: 0 @  12:00am
 NWS Weather Forecast  - Outlook: Overnight & Tuesday
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 82 °F		 NWS forecast: Mostly clear. Low around 82, with temperatures rising to around 83 overnight. West wind around 9 mph.
 
Tuesday

Tuesday: 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.