Heat Advisory — Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA 7:00 PM Extreme Heat Warning — Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA 7:00 PM

Jacksonville, Florida

Last updated: 3:00 PM CDT  ·  Refresh
35°C
Feels like 42°
Partly Cloudy
▲ 36°  /  ▼ 26°
Wind
8 mph W
Humidity
53%
Dew Point
24°
Pressure
29.94 inHg
Visibility
10 mi
UV Index
8.0
Cloud Cover
39%
Sunrise
6:54 AM
Sunset
8:05 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jacksonville is currently partly cloudy at 35°C. Precipitation is likely — peak probability 69% around 4 PM. Atmospheric instability is elevated (CAPE up to 3066 J/kg) — isolated convective development possible. Sunrise: 6:54AM · Sunset: 8:05PM.

Alerts

Heat Advisory
Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA
Expires 7:00 PM
Extreme Heat Warning
Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA
Expires 7:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
35°
18%
5 PM
36°
32%
6 PM
36°
38%
7 PM
34°
41%
8 PM
33°
42%
9 PM
32°
42%
10 PM
29°
38%
11 PM
28°
26%
12 AM
28°
26%
1 AM
28°
23%
2 AM
28°
9%
3 AM
28°
9%
4 AM
27°
9%
5 AM
27°
7%
6 AM
26°
7%
7 AM
26°
3%
8 AM
26°
3%
9 AM
27°
20%
10 AM
29°
23%
11 AM
31°
23%
12 PM
32°
23%
1 PM
33°
34%
2 PM
34°
39%
3 PM
36°
57%
7-Day Forecast
Today
36° 26°
Partly Cloudy with a 41% chance of rain.
Tue
38° 26°
Partly Cloudy with a 69% chance of rain.
Wed
39° 24°
Partly Cloudy with a 65% chance of rain.
Thu
36° 24°
Mostly Cloudy with a 78% chance of rain.
Fri
36° 23°
Rain, 90% chance.
Sat
34° 23°
Rain, 81% chance.
Sun
34° 22°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 35° Partly Cloudy 18% 8 mph W 53%
5 PM 36° Partly Cloudy 32% 8 mph WSW 45%
6 PM 36° Partly Cloudy 38% 7 mph WSW 53%
7 PM 34° Partly Cloudy 41% 6 mph SW 62%
8 PM 33° Partly Cloudy 42% 5 mph SW 66%
9 PM 32° Partly Cloudy 42% 5 mph SW 71%
10 PM 29° Partly Cloudy 38% 5 mph SW 76%
11 PM 28° Mostly Clear 26% 6 mph SW 81%
12 AM 28° Partly Cloudy 26% 7 mph WSW 79%
1 AM 28° Partly Cloudy 23% 7 mph WSW 79%
2 AM 28° Partly Cloudy 9% 8 mph WSW 78%
3 AM 28° Partly Cloudy 9% 7 mph W 79%
4 AM 27° Partly Cloudy 9% 7 mph W 80%
5 AM 27° Mostly Clear 7% 7 mph W 81%
6 AM 26° Mostly Clear 7% 7 mph WSW 82%
7 AM 26° Mostly Clear 3% 7 mph WSW 83%
8 AM 26° Mostly Clear 3% 7 mph WSW 83%
9 AM 27° Mostly Clear 20% 7 mph WSW 78%
10 AM 29° Mostly Clear 23% 8 mph W 72%
11 AM 31° Mostly Clear 23% 8 mph W 67%
12 PM 32° Mostly Clear 23% 8 mph W 64%
1 PM 33° Mostly Clear 34% 7 mph W 60%
2 PM 34° Mostly Clear 39% 7 mph WSW 56%
3 PM 36° Partly Cloudy 57% 8 mph WSW 56%
15-Day Forecast
Today
8/17
Partly Cloudy
41%
26°
36°
Tue
8/18
Partly Cloudy
69%
26°
38°
Wed
8/19
Partly Cloudy
65%
24°
39°
Thu
8/20
Mostly Cloudy
78%
24°
36°
Fri
8/21
Rain
90%
23°
36°
Sat
8/22
Rain
81%
23°
34°
Sun
8/23
Drizzle
60%
22°
34°
Mon
8/24
Drizzle
60%
23°
33°
Tue
8/25
Drizzle
60%
24°
34°
Wed
8/26
Drizzle
60%
24°
34°
Thu
8/27
Drizzle
60%
24°
33°
Fri
8/28
Drizzle
60%
25°
33°
Sat
8/29
Drizzle
60%
24°
32°
Sun
8/30
Drizzle
60%
24°
32°
Mon
8/31
Drizzle
60%
24°
32°
54
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
54 AQI 10.7 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 54 Moderate 32 54
Wed 53 Moderate 33 53
Thu 52 Moderate 40 52
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Mon Aug 17, 18:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3829 J/kg
MLCAPE3041 J/kg
MUCAPE3829 J/kg
SBCIN0 J/kg
MLCIN-6 J/kg
Lifted Index-7.1
Kinematics
0–6 km Shear6 kt
0–1 km Shear5 kt
Eff. Shear12 kt
0–1 km SRH-12
0–3 km SRH-26
Eff. SRH-26
Storm Motion218° @ 15 kt
0–1 km EHI-0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.8
Thermo & Levels
PWAT2.45 in
0–3 km LR8.0 °C/km
700–500 LR5.4 °C/km
Total Totals47.1
LCL866 hPa
LFC1014 hPa
EL124 hPa
Freezing Lvl16,598 ft