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: 8:32 PM CDT  ·  Refresh
28°C
Feels like 32°
Mostly Cloudy
▲ 32°  /  ▼ 26°
Wind
4 mph SSW
Humidity
84%
Dew Point
25°
Pressure
30.01 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
79%
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 3228 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
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
32%
10 PM
26°
48%
11 PM
26°
42%
12 AM
26°
41%
1 AM
27°
27%
2 AM
27°
18%
3 AM
27°
27%
4 AM
26°
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
36°
18%
4 PM
36°
18%
5 PM
33°
19%
6 PM
33°
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°
Overcast with a 37% chance of rain.
Thu
37° 27°
Clear.
Fri
37° 24°
Rain, 82% chance.
Sat
35° 24°
Rain, 90% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Mostly Cloudy 32% 4 mph SSW 84%
10 PM 26° Overcast 48% 3 mph SE 86%
11 PM 26° Overcast 42% 4 mph SSW 86%
12 AM 26° Mostly Cloudy 41% 4 mph SW 84%
1 AM 27° Mostly Cloudy 27% 4 mph SW 83%
2 AM 27° Mostly Cloudy 18% 4 mph WSW 83%
3 AM 27° Partly Cloudy 27% 4 mph WSW 84%
4 AM 26° Mostly Clear 27% 4 mph WSW 85%
5 AM 26° Partly Cloudy 8% 4 mph WSW 85%
6 AM 26° Partly Cloudy 8% 4 mph SW 85%
7 AM 26° Partly Cloudy 5% 4 mph WSW 85%
8 AM 27° Partly Cloudy 10% 4 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 SW 59%
1 PM 36° Partly Cloudy 17% 6 mph SSW 57%
2 PM 36° Partly Cloudy 18% 7 mph S 56%
3 PM 36° Partly Cloudy 18% 7 mph S 58%
4 PM 36° Partly Cloudy 18% 8 mph SSW 59%
5 PM 33° Partly Cloudy 19% 8 mph SSW 62%
6 PM 33° Mostly Clear 19% 8 mph SSW 64%
7 PM 32° Mostly Clear 9% 8 mph SSW 67%
8 PM 32° Mostly Clear 3% 7 mph SSW 69%
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
Overcast
37%
27°
37°
Thu
8/20
Clear
8%
27°
37°
Fri
8/21
Rain
82%
24°
37°
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°
55
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
55 AQI 11.6 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 55 Moderate 44 55
Tue 58 Moderate 43 58
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
SBCAPE2284 J/kg
MLCAPE2170 J/kg
MUCAPE2484 J/kg
SBCIN-14 J/kg
MLCIN-12 J/kg
Lifted Index-5.0
Kinematics
0–6 km Shear2 kt
0–1 km Shear8 kt
Eff. Shear5 kt
0–1 km SRH-38
0–3 km SRH-5
Eff. SRH-5
Storm Motion150° @ 13 kt
0–1 km EHI-0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.8
Thermo & Levels
PWAT2.71 in
0–3 km LR5.4 °C/km
700–500 LR5.5 °C/km
Total Totals45.1
LCL980 hPa
LFC891 hPa
EL135 hPa
Freezing Lvl16,063 ft