Excessive Heat Warning — Inland Berkeley, SC, Beaufort, SC, Coastal Colleton, SC, Charleston, SC, Coastal Jasper, SC, Tidal Berkeley, SC, Allendale, SC, Hampton, SC, Inland Colleton, SC, Dorchester, SC, Inland Jasper, SC 7:00 PM

Charleston, South Carolina

Last updated: 8:34 PM CDT  ·  Refresh
28°C
Feels like 32°
Mostly Cloudy
▲ 32°  /  ▼ 26°
Wind
4 mph SSW
Humidity
82%
Dew Point
25°
Pressure
30.01 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
75%
Sunrise
6:43 AM
Sunset
8:03 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Charleston is currently mostly cloudy at 28°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3189 J/kg) — isolated convective development possible. Sunrise: 6:43AM · Sunset: 8:03PM.

Alerts

Excessive Heat Warning
Inland Berkeley, SC, Beaufort, SC, Coastal Colleton, SC, Charleston, SC, Coastal Jasper, SC, Tidal Berkeley, SC, Allendale, SC, Hampton, SC, Inland Colleton, SC, Dorchester, SC, Inland Jasper, SC
Expires 7:00 PM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
32%
10 PM
27°
48%
11 PM
27°
42%
12 AM
26°
41%
1 AM
27°
27%
2 AM
27°
18%
3 AM
27°
27%
4 AM
27°
27%
5 AM
26°
8%
6 AM
26°
8%
7 AM
26°
5%
8 AM
27°
10%
9 AM
31°
18%
10 AM
32°
19%
11 AM
33°
17%
12 PM
34°
17%
1 PM
36°
17%
2 PM
36°
18%
3 PM
35°
18%
4 PM
35°
18%
5 PM
33°
19%
6 PM
32°
19%
7 PM
32°
9%
8 PM
32°
3%
7-Day Forecast
Tonight
32° 26°
Mostly Cloudy with a 32% chance of rain.
Mon
37° 26°
Partly Cloudy with a 41% chance of rain.
Tue
39° 28°
Mostly Clear with a 31% chance of rain.
Wed
37° 27°
Mostly Cloudy with a 37% chance of rain.
Thu
37° 27°
Clear.
Fri
36° 24°
Rain, 82% chance.
Sat
35° 24°
Rain, 90% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Mostly Cloudy 32% 4 mph SSW 82%
10 PM 27° Overcast 48% 4 mph SSE 84%
11 PM 27° Overcast 42% 4 mph SSW 83%
12 AM 26° Mostly Cloudy 41% 4 mph WSW 83%
1 AM 27° Mostly Cloudy 27% 4 mph WSW 82%
2 AM 27° Mostly Cloudy 18% 5 mph WSW 82%
3 AM 27° Partly Cloudy 27% 5 mph WSW 84%
4 AM 27° Partly Cloudy 27% 5 mph WSW 86%
5 AM 26° Partly Cloudy 8% 5 mph WSW 86%
6 AM 26° Partly Cloudy 8% 4 mph WSW 86%
7 AM 26° Partly Cloudy 5% 5 mph WSW 85%
8 AM 27° Partly Cloudy 10% 5 mph WSW 81%
9 AM 31° Partly Cloudy 18% 4 mph W 73%
10 AM 32° Partly Cloudy 19% 4 mph W 66%
11 AM 33° Partly Cloudy 17% 4 mph WSW 61%
12 PM 34° Partly Cloudy 17% 4 mph SSW 59%
1 PM 36° Partly Cloudy 17% 6 mph S 57%
2 PM 36° Partly Cloudy 18% 6 mph S 57%
3 PM 35° Partly Cloudy 18% 7 mph S 58%
4 PM 35° Partly Cloudy 18% 8 mph SSW 60%
5 PM 33° Mostly Clear 19% 8 mph SSW 62%
6 PM 32° Mostly Clear 19% 8 mph SSW 65%
7 PM 32° Mostly Clear 9% 8 mph SSW 68%
8 PM 32° Mostly Clear 3% 8 mph SSW 70%
15-Day Forecast
Today
8/16
Mostly Cloudy
32%
26°
32°
Mon
8/17
Partly Cloudy
41%
26°
37°
Tue
8/18
Mostly Clear
31%
28°
39°
Wed
8/19
Mostly Cloudy
37%
27°
37°
Thu
8/20
Clear
8%
27°
37°
Fri
8/21
Rain
82%
24°
36°
Sat
8/22
Rain
90%
24°
35°
Sun
8/23
Rain
63%
24°
34°
Mon
8/24
Drizzle
68%
24°
35°
Tue
8/25
Drizzle
68%
25°
34°
Wed
8/26
Drizzle
90%
24°
34°
Thu
8/27
Rain
90%
26°
33°
Fri
8/28
Drizzle
60%
25°
32°
Sat
8/29
Drizzle
60%
24°
32°
Sun
8/30
Drizzle
60%
24°
31°
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 11.6 µg/m³
O3
Ground-level ozone
42 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 56 Moderate 42 56
Tue 59 Moderate 41 59
Wed 60 Moderate 44 60
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 Sun Aug 16, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2539 J/kg
MLCAPE2304 J/kg
MUCAPE2838 J/kg
SBCIN-14 J/kg
MLCIN-11 J/kg
Lifted Index-5.3
Kinematics
0–6 km Shear1 kt
0–1 km Shear9 kt
Eff. Shear5 kt
0–1 km SRH-42
0–3 km SRH-12
Eff. SRH-12
Storm Motion163° @ 13 kt
0–1 km EHI-0.7
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.7
Thermo & Levels
PWAT2.69 in
0–3 km LR5.5 °C/km
700–500 LR5.5 °C/km
Total Totals45.0
LCL978 hPa
LFC900 hPa
EL131 hPa
Freezing Lvl16,201 ft