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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 6:22am  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 77.9, Max: 80.6, Min: 77.9 77.9°F
Colder 0.4°F than last hour.

Comfortable

Feels like: 78°F

24-hr difference
31.5°FWarmer 31.5°F than yesterday at this time.
  Today Yesterday
High: 80.6°F
1:20am 		99.9°F
2:52pm
Low: 77.9°F
6:02am 		77.9°F
5:22am
Wind from SSW SSW
1.8
Gust:
 4.5 mph
1 Bft - Light air
Today: 6 mph 12:05am
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
Thursday

Thursday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 85 % Increased 1.0% since last hour.
Dew Point: 73°F  
Barometer: 29.48 inHg Rising 0.01 inHg/hr
Baro Trend: Steady
Sunrise: 6:56am
Sunset: 8:02pm
Moonset: 12:05am
Moonrise: 2:46pm
Waxing Gibbous
Waxing Gibbous, Moon at 7 days in cycle
53%
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 & Thursday
Overnight

Overnight: Partly Cloudy
Partly Cloudy

Lo 77 °F		 NWS forecast: Partly cloudy. Low around 77, with temperatures rising to around 78 overnight. West wind around 5 mph.
 
Thursday

Thursday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms

Hi 97 °F		 NWS forecast: A chance of showers and thunderstorms after 1pm. Mostly sunny. High near 97, with temperatures falling to around 96 in the afternoon. Heat index values as high as 110. Southwest wind 3 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.