Severe Thunderstorm Watch 9:00 PM Extreme Heat Warning — Washington, FL, Jackson, FL, Inland Bay, FL, Calhoun, FL, Inland Gulf, FL, Inland Franklin, FL, Gadsden, FL, Leon, FL, Inland Jefferson, FL, Madison, FL, Inland Wakulla, FL, Inland Taylor, FL, Lafayette, FL, Inland Dixie, FL, South Walton, FL, Coastal Bay, FL, Coastal Gulf, FL, Coastal Franklin, FL, Coastal Jefferson, FL, Coastal Wakulla, FL, Coastal Taylor, FL, Coastal Dixie, FL, Northern Liberty, FL, Southern Liberty, FL, Seminole, GA, Decatur, GA, Grady, GA, Thomas, GA, Brooks, GA, Lowndes, GA, Lanier, GA 7:00 PM Excessive Heat Watch 7:00 PM Extreme Heat Warning — Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Inland Glynn, GA, Coastal Glynn, GA, Echols, GA, Clinch, GA, Inland Camden, GA, Coastal Camden, GA, Northeastern Charlton, GA, Southern Ware, GA, Western Charlton, GA 7:00 PM

Saint Augustine, Florida

Last updated: 5:22 PM CDT  ·  Refresh
33°C
Feels like 40°
Partly Cloudy
▲ 36°  /  ▼ 26°
Wind
10 mph SW
Humidity
62%
Dew Point
24°
Pressure
29.77 inHg
Visibility
10 mi
UV Index
4.8
Cloud Cover
41%
Sunrise
6:42 AM
Sunset
8:20 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Saint Augustine is currently partly cloudy at 33°C. Precipitation is likely — peak probability 61% around 6 PM. Atmospheric instability is elevated (CAPE up to 2810 J/kg) — isolated convective development possible. Sunrise: 6:42AM · Sunset: 8:20PM.

Alerts

Severe Thunderstorm Watch
Expires 9:00 PM
Extreme Heat Warning
Washington, FL, Jackson, FL, Inland Bay, FL, Calhoun, FL, Inland Gulf, FL, Inland Franklin, FL, Gadsden, FL, Leon, FL, Inland Jefferson, FL, Madison, FL, Inland Wakulla, FL, Inland Taylor, FL, Lafayette, FL, Inland Dixie, FL, South Walton, FL, Coastal Bay, FL, Coastal Gulf, FL, Coastal Franklin, FL, Coastal Jefferson, FL, Coastal Wakulla, FL, Coastal Taylor, FL, Coastal Dixie, FL, Northern Liberty, FL, Southern Liberty, FL, Seminole, GA, Decatur, GA, Grady, GA, Thomas, GA, Brooks, GA, Lowndes, GA, Lanier, GA
Expires 7:00 PM
Excessive Heat Watch
Expires 7:00 PM
Extreme Heat Warning
Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Inland Glynn, GA, Coastal Glynn, GA, Echols, GA, Clinch, GA, Inland Camden, GA, Coastal Camden, GA, Northeastern Charlton, GA, Southern Ware, GA, Western Charlton, GA
Expires 7:00 PM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
16%
7 PM
33°
43%
8 PM
32°
42%
9 PM
31°
44%
10 PM
29°
44%
11 PM
29°
41%
12 AM
28°
51%
1 AM
28°
51%
2 AM
27°
52%
3 AM
27°
47%
4 AM
27°
43%
5 AM
27°
51%
6 AM
26°
38%
7 AM
26°
37%
8 AM
27°
37%
9 AM
27°
39%
10 AM
29°
44%
11 AM
29°
47%
12 PM
30°
51%
1 PM
31°
52%
2 PM
32°
52%
3 PM
32°
53%
4 PM
32°
53%
5 PM
32°
54%
7-Day Forecast
Tonight
36° 26°
Partly Cloudy with a 44% chance of rain.
Thu
35° 26°
Partly Cloudy with a 60% chance of rain.
Fri
35° 25°
Partly Cloudy with a 90% chance of rain.
Sat
33° 24°
Mostly Cloudy with a 80% chance of rain.
Sun
33° 24°
Drizzle, 71% chance.
Mon
32° 24°
Rain, 78% chance.
Tue
32° 24°
Drizzle, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 33° Partly Cloudy 16% 10 mph SW 62%
7 PM 33° Partly Cloudy 43% 11 mph SW 69%
8 PM 32° Mostly Cloudy 42% 11 mph SW 72%
9 PM 31° Mostly Cloudy 44% 11 mph SW 75%
10 PM 29° Mostly Cloudy 44% 12 mph SW 78%
11 PM 29° Overcast 41% 11 mph SW 80%
12 AM 28° Overcast 51% 9 mph SW 83%
1 AM 28° Overcast 51% 9 mph WSW 85%
2 AM 27° Overcast 52% 9 mph WSW 87%
3 AM 27° Overcast 47% 8 mph SW 88%
4 AM 27° Rain 43% 8 mph SW 89%
5 AM 27° Mostly Cloudy 51% 8 mph SW 89%
6 AM 26° Mostly Cloudy 38% 7 mph SW 88%
7 AM 26° Mostly Cloudy 37% 7 mph SW 86%
8 AM 27° Mostly Cloudy 37% 8 mph SW 83%
9 AM 27° Partly Cloudy 39% 8 mph SW 78%
10 AM 29° Partly Cloudy 44% 9 mph SW 74%
11 AM 29° Partly Cloudy 47% 10 mph SW 69%
12 PM 30° Partly Cloudy 51% 10 mph SW 66%
1 PM 31° Partly Cloudy 52% 11 mph SW 64%
2 PM 32° Partly Cloudy 52% 11 mph SW 62%
3 PM 32° Partly Cloudy 53% 10 mph SW 61%
4 PM 32° Partly Cloudy 53% 10 mph SW 60%
5 PM 32° Partly Cloudy 54% 10 mph SW 60%
15-Day Forecast
Today
7/29
Partly Cloudy
44%
26°
36°
Thu
7/30
Partly Cloudy
60%
26°
35°
Fri
7/31
Partly Cloudy
90%
25°
35°
Sat
8/1
Mostly Cloudy
80%
24°
33°
Sun
8/2
Drizzle
71%
24°
33°
Mon
8/3
Rain
78%
24°
32°
Tue
8/4
Drizzle
63%
24°
32°
Wed
8/5
Drizzle
60%
24°
32°
Thu
8/6
Thunderstorm
60%
25°
32°
Fri
8/7
Thunderstorm
50%
26°
33°
Sat
8/8
Drizzle
51%
25°
33°
Sun
8/9
Drizzle
60%
26°
34°
Mon
8/10
Rain
90%
26°
34°
Tue
8/11
Drizzle
60%
26°
34°
Wed
8/12
Drizzle
60%
26°
34°
56
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
56 AQI 12.1 µg/m³
O3
Ground-level ozone
34 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 56 Moderate 34 56
Fri 56 Moderate 32 56
Sat 55 Moderate 39 55
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 Wed Jul 29, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3092 J/kg
MLCAPE2354 J/kg
MUCAPE3196 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-7.0
Kinematics
0–6 km Shear12 kt
0–1 km Shear8 kt
Eff. Shear17 kt
0–1 km SRH20
0–3 km SRH16
Eff. SRH16
Storm Motion250° @ 24 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.1
STP (eff)0.1
Supercell0.4
K-Index26.0
Thermo & Levels
PWAT2.01 in
0–3 km LR6.5 °C/km
700–500 LR6.6 °C/km
Total Totals45.5
LCL889 hPa
LFC1008 hPa
EL144 hPa
Freezing Lvl15,735 ft