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: 2:59 PM CDT  ·  Refresh
35°C
Feels like 40°
Mostly Cloudy
▲ 37°  /  ▼ 26°
Wind
8 mph W
Humidity
50%
Dew Point
24°
Pressure
29.95 inHg
Visibility
10 mi
UV Index
6.8
Cloud Cover
63%
Sunrise
6:54 AM
Sunset
8:06 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jacksonville is currently mostly cloudy at 35°C. Precipitation is likely — peak probability 57% around 3 PM. Atmospheric instability is elevated (CAPE up to 2910 J/kg) — isolated convective development possible. Sunrise: 6:54AM · Sunset: 8:06PM.

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°
31%
4 PM
36°
17%
5 PM
37°
23%
6 PM
35°
28%
7 PM
33°
27%
8 PM
32°
27%
9 PM
30°
26%
10 PM
29°
13%
11 PM
28°
13%
12 AM
28°
5%
1 AM
28°
5%
2 AM
28°
5%
3 AM
27°
5%
4 AM
27°
3%
5 AM
26°
3%
6 AM
26°
3%
7 AM
26°
3%
8 AM
27°
20%
9 AM
29°
23%
10 AM
31°
23%
11 AM
32°
23%
12 PM
33°
24%
1 PM
34°
24%
2 PM
34°
42%
7-Day Forecast
Today
37° 26°
Partly Cloudy with a 31% chance of rain.
Tue
38° 26°
Partly Cloudy with a 57% chance of rain.
Wed
40° 26°
Partly Cloudy with a 49% chance of rain.
Thu
37° 25°
Rain, 82% chance.
Fri
37° 23°
Drizzle, 68% chance.
Sat
35° 23°
Rain, 81% chance.
Sun
34° 22°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 35° Mostly Cloudy 31% 8 mph W 50%
4 PM 36° Mostly Cloudy 17% 7 mph W 41%
5 PM 37° Partly Cloudy 23% 7 mph WSW 45%
6 PM 35° Partly Cloudy 28% 7 mph SW 56%
7 PM 33° Partly Cloudy 27% 7 mph SW 61%
8 PM 32° Mostly Cloudy 27% 6 mph WSW 68%
9 PM 30° Mostly Cloudy 26% 6 mph SW 74%
10 PM 29° Mostly Cloudy 13% 7 mph SW 78%
11 PM 28° Partly Cloudy 13% 7 mph WSW 78%
12 AM 28° Partly Cloudy 5% 7 mph WSW 78%
1 AM 28° Partly Cloudy 5% 8 mph WSW 78%
2 AM 28° Partly Cloudy 5% 7 mph WSW 79%
3 AM 27° Mostly Clear 5% 7 mph W 80%
4 AM 27° Mostly Clear 3% 6 mph WSW 81%
5 AM 26° Mostly Clear 3% 6 mph WSW 82%
6 AM 26° Partly Cloudy 3% 6 mph WSW 83%
7 AM 26° Partly Cloudy 3% 6 mph WSW 83%
8 AM 27° Partly Cloudy 20% 7 mph WSW 77%
9 AM 29° Mostly Clear 23% 7 mph W 71%
10 AM 31° Mostly Clear 23% 7 mph W 66%
11 AM 32° Mostly Clear 23% 7 mph W 62%
12 PM 33° Mostly Clear 24% 7 mph W 58%
1 PM 34° Clear 24% 6 mph W 54%
2 PM 34° Mostly Clear 42% 6 mph W 54%
15-Day Forecast
Today
8/17
Partly Cloudy
31%
26°
37°
Tue
8/18
Partly Cloudy
57%
26°
38°
Wed
8/19
Partly Cloudy
49%
26°
40°
Thu
8/20
Rain
82%
25°
37°
Fri
8/21
Drizzle
68%
23°
37°
Sat
8/22
Rain
81%
23°
35°
Sun
8/23
Drizzle
60%
22°
34°
Mon
8/24
Drizzle
60%
23°
34°
Tue
8/25
Drizzle
60%
24°
35°
Wed
8/26
Drizzle
60%
24°
36°
Thu
8/27
Drizzle
60%
24°
33°
Fri
8/28
Drizzle
60%
24°
33°
Sat
8/29
Drizzle
60%
24°
33°
Sun
8/30
Drizzle
60%
24°
32°
Mon
8/31
Rain
90%
23°
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 10.6 µg/m³
O3
Ground-level ozone
31 AQI 33 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 54 Moderate 31 54
Wed 54 Moderate 29 54
Thu 52 Moderate 33 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
SBCAPE3356 J/kg
MLCAPE2397 J/kg
MUCAPE3356 J/kg
SBCIN0 J/kg
MLCIN-9 J/kg
Lifted Index-6.6
Kinematics
0–6 km Shear7 kt
0–1 km Shear5 kt
Eff. Shear11 kt
0–1 km SRH-10
0–3 km SRH-20
Eff. SRH-20
Storm Motion210° @ 13 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.6
Thermo & Levels
PWAT2.40 in
0–3 km LR7.8 °C/km
700–500 LR5.6 °C/km
Total Totals47.0
LCL864 hPa
LFC1014 hPa
EL127 hPa
Freezing Lvl16,499 ft