Heat Advisory — Inland Flagler, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Putnam, FL, Coastal Flagler, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Putnam, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Northern Inland St. Johns, FL, Southern Inland St. Johns, FL, Western St. Johns, FL 6:00 PM

Jacksonville, Florida

Last updated: 4:46 PM CDT  ·  Refresh
31°C
Feels like 39°
Partly Cloudy
▲ 34°  /  ▼ 23°
Wind
8 mph SSW
Humidity
74%
Dew Point
23°
Pressure
29.93 inHg
Visibility
10 mi
UV Index
4.9
Cloud Cover
59%
Sunrise
6:56 AM
Sunset
8:02 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jacksonville is currently partly cloudy at 31°C. Precipitation is likely — peak probability 69% around 6 PM. Atmospheric instability is elevated (CAPE up to 2136 J/kg) — isolated convective development possible. Sunrise: 6:56AM · Sunset: 8:02PM.

Alerts

Heat Advisory
Inland Flagler, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Putnam, FL, Coastal Flagler, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Putnam, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Northern Inland St. Johns, FL, Southern Inland St. Johns, FL, Western St. Johns, FL
Expires 6:00 PM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
63%
6 PM
28°
69%
7 PM
27°
67%
8 PM
26°
57%
9 PM
26°
58%
10 PM
26°
55%
11 PM
26°
50%
12 AM
26°
51%
1 AM
25°
43%
2 AM
25°
19%
3 AM
24°
19%
4 AM
24°
19%
5 AM
23°
11%
6 AM
23°
8%
7 AM
24°
5%
8 AM
25°
18%
9 AM
27°
25%
10 AM
28°
27%
11 AM
29°
35%
12 PM
30°
39%
1 PM
32°
39%
2 PM
32°
42%
3 PM
32°
43%
4 PM
32°
43%
7-Day Forecast
Today
34° 23°
Partly Cloudy with a 63% chance of rain.
Fri
35° 23°
Partly Cloudy with a 49% chance of rain.
Sat
34° 23°
Mostly Cloudy with a 81% chance of rain.
Sun
36° 23°
Partly Cloudy with a 70% chance of rain.
Mon
37° 24°
Drizzle, 44% chance.
Tue
36° 24°
Rain, 72% chance.
Wed
35° 23°
Rain, 70% chance.
TimeTempConditionsPrecipWindHumidity
Now 31° Partly Cloudy 63% 8 mph SSW 74%
6 PM 28° Overcast 69% 8 mph SW 79%
7 PM 27° Overcast 67% 7 mph SSW 78%
8 PM 26° Heavy Rain 57% 6 mph SSW 79%
9 PM 26° Heavy Rain 58% 6 mph SSW 80%
10 PM 26° Heavy Rain 55% 6 mph SSW 81%
11 PM 26° Mostly Cloudy 50% 6 mph SSW 82%
12 AM 26° Mostly Cloudy 51% 6 mph SW 83%
1 AM 25° Mostly Cloudy 43% 5 mph SW 84%
2 AM 25° Mostly Cloudy 19% 5 mph WSW 85%
3 AM 24° Partly Cloudy 19% 4 mph SW 86%
4 AM 24° Partly Cloudy 19% 4 mph SW 88%
5 AM 23° Partly Cloudy 11% 4 mph SW 87%
6 AM 23° Partly Cloudy 8% 3 mph SW 86%
7 AM 24° Partly Cloudy 5% 3 mph SSW 86%
8 AM 25° Partly Cloudy 18% 4 mph SSW 80%
9 AM 27° Partly Cloudy 25% 5 mph SSW 73%
10 AM 28° Partly Cloudy 27% 6 mph SSW 67%
11 AM 29° Partly Cloudy 35% 6 mph SSW 64%
12 PM 30° Partly Cloudy 39% 6 mph SSW 63%
1 PM 32° Partly Cloudy 39% 6 mph SSW 61%
2 PM 32° Partly Cloudy 42% 6 mph SSW 59%
3 PM 32° Mostly Clear 43% 6 mph SSW 57%
4 PM 32° Mostly Clear 43% 6 mph SSW 54%
15-Day Forecast
Today
8/20
Partly Cloudy
63%
23°
34°
Fri
8/21
Partly Cloudy
49%
23°
35°
Sat
8/22
Mostly Cloudy
81%
23°
34°
Sun
8/23
Partly Cloudy
70%
23°
36°
Mon
8/24
Drizzle
44%
24°
37°
Tue
8/25
Rain
72%
24°
36°
Wed
8/26
Rain
70%
23°
35°
Thu
8/27
Rain
75%
23°
35°
Fri
8/28
Drizzle
54%
24°
36°
Sat
8/29
Drizzle
52%
26°
35°
Sun
8/30
Drizzle
60%
22°
32°
Mon
8/31
Drizzle
60%
24°
33°
Tue
9/1
Drizzle
60%
24°
33°
Wed
9/2
Drizzle
60%
25°
33°
Thu
9/3
Drizzle
60%
24°
33°
53
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
53 AQI 10.0 µg/m³
O3
Ground-level ozone
33 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 53 Moderate 33 53
Sat 52 Moderate 36 52
Sun 51 Moderate 29 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 Thu Aug 20, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2378 J/kg
MLCAPE2432 J/kg
MUCAPE2557 J/kg
SBCIN-16 J/kg
MLCIN-26 J/kg
Lifted Index-6.3
Kinematics
0–6 km Shear13 kt
0–1 km Shear7 kt
Eff. Shear9 kt
0–1 km SRH-33
0–3 km SRH42
Eff. SRH42
Storm Motion138° @ 23 kt
0–1 km EHI-0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.3
Thermo & Levels
PWAT2.47 in
0–3 km LR6.9 °C/km
700–500 LR5.9 °C/km
Total Totals49.9
LCL904 hPa
LFC858 hPa
EL166 hPa
Freezing Lvl14,701 ft