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: 12:40 PM CDT  ·  Refresh
33°C
Feels like 42°
Mostly Cloudy
▲ 37°  /  ▼ 26°
Wind
9 mph WNW
Humidity
63%
Dew Point
25°
Pressure
29.98 inHg
Visibility
10 mi
UV Index
8.1
Cloud Cover
60%
Sunrise
6:54 AM
Sunset
8:05 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jacksonville is currently mostly cloudy at 34°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2948 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
33°
36%
2 PM
34°
34%
3 PM
35°
18%
4 PM
35°
21%
5 PM
36°
21%
6 PM
35°
30%
7 PM
34°
39%
8 PM
33°
40%
9 PM
30°
23%
10 PM
29°
24%
11 PM
28°
25%
12 AM
28°
22%
1 AM
28°
12%
2 AM
28°
7%
3 AM
28°
12%
4 AM
27°
12%
5 AM
26°
12%
6 AM
26°
8%
7 AM
26°
9%
8 AM
27°
18%
9 AM
29°
30%
10 AM
31°
30%
11 AM
32°
41%
12 PM
33°
41%
7-Day Forecast
Today
37° 26°
Partly Cloudy with a 39% chance of rain.
Tue
38° 26°
Partly Cloudy with a 61% chance of rain.
Wed
38° 23°
Rain, 69% chance.
Thu
36° 23°
Partly Cloudy with a 77% chance of rain.
Fri
36° 24°
Rain, 76% chance.
Sat
32° 24°
Rain, 90% chance.
Sun
33° 23°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 33° Mostly Cloudy 36% 9 mph WNW 63%
2 PM 34° Mostly Cloudy 34% 8 mph W 58%
3 PM 35° Partly Cloudy 18% 7 mph W 53%
4 PM 35° Partly Cloudy 21% 7 mph W 48%
5 PM 36° Partly Cloudy 21% 6 mph W 50%
6 PM 35° Partly Cloudy 30% 6 mph WSW 55%
7 PM 34° Partly Cloudy 39% 5 mph SW 61%
8 PM 33° Partly Cloudy 40% 5 mph SW 66%
9 PM 30° Mostly Cloudy 23% 4 mph SW 71%
10 PM 29° Mostly Cloudy 24% 5 mph SW 74%
11 PM 28° Partly Cloudy 25% 6 mph WSW 76%
12 AM 28° Partly Cloudy 22% 6 mph WSW 76%
1 AM 28° Partly Cloudy 12% 7 mph WSW 76%
2 AM 28° Partly Cloudy 7% 7 mph WSW 77%
3 AM 28° Partly Cloudy 12% 7 mph WSW 78%
4 AM 27° Mostly Clear 12% 7 mph W 78%
5 AM 26° Mostly Clear 12% 7 mph W 79%
6 AM 26° Mostly Clear 8% 7 mph WSW 80%
7 AM 26° Mostly Clear 9% 7 mph WSW 80%
8 AM 27° Mostly Clear 18% 7 mph W 77%
9 AM 29° Mostly Clear 30% 7 mph W 71%
10 AM 31° Mostly Clear 30% 7 mph W 64%
11 AM 32° Mostly Clear 41% 7 mph W 60%
12 PM 33° Mostly Clear 41% 7 mph W 56%
15-Day Forecast
Today
8/17
Partly Cloudy
39%
26°
37°
Tue
8/18
Partly Cloudy
61%
26°
38°
Wed
8/19
Rain
69%
23°
38°
Thu
8/20
Partly Cloudy
77%
23°
36°
Fri
8/21
Rain
76%
24°
36°
Sat
8/22
Rain
90%
24°
32°
Sun
8/23
Rain
63%
23°
33°
Mon
8/24
Rain
69%
22°
34°
Tue
8/25
Drizzle
44%
23°
35°
Wed
8/26
Drizzle
60%
26°
35°
Thu
8/27
Rain
75%
24°
34°
Fri
8/28
Rain
90%
25°
33°
Sat
8/29
Drizzle
60%
25°
33°
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
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 54 Moderate 31 54
Wed 53 Moderate 32 53
Thu 51 Moderate 44 51
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, 16:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3922 J/kg
MLCAPE2720 J/kg
MUCAPE3922 J/kg
SBCIN-41 J/kg
MLCIN-16 J/kg
Lifted Index-7.2
Kinematics
0–6 km Shear6 kt
0–1 km Shear3 kt
Eff. Shear13 kt
0–1 km SRH-4
0–3 km SRH-18
Eff. SRH-18
Storm Motion237° @ 18 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.2
Thermo & Levels
PWAT2.37 in
0–3 km LR7.4 °C/km
700–500 LR5.5 °C/km
Total Totals47.4
LCL898 hPa
LFC869 hPa
EL123 hPa
Freezing Lvl16,650 ft