Heat Advisory — Lincoln, GA, McDuffie, GA, Columbia, GA, Richmond, GA, Burke, GA, Chesterfield, SC, McCormick, SC, Newberry, SC, Fairfield, SC, Kershaw, SC, Edgefield, SC, Saluda, SC, Lexington, SC, Richland, SC, Lee, SC, Aiken, SC, Sumter, SC, Barnwell, SC, Calhoun, SC, Clarendon, SC, Bamberg, SC, Northern Lancaster, SC, Southern Lancaster, SC, Northwestern Orangeburg, SC, Central Orangeburg, SC, Southeastern Orangeburg, SC 7:00 PM

Sumter, South Carolina

Last updated: 7:21 AM CDT  ·  Refresh
27°C
Feels like 29°
Mostly Clear
▲ 36°  /  ▼ 24°
Wind
3 mph WNW
Humidity
79%
Dew Point
24°
Pressure
29.91 inHg
Visibility
10 mi
UV Index
4.7
Cloud Cover
14%
Sunrise
6:43 AM
Sunset
8:07 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sumter is currently mostly clear at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2049 J/kg) — isolated convective development possible. Sunrise: 6:43AM · Sunset: 8:07PM.

Alerts

Heat Advisory
Lincoln, GA, McDuffie, GA, Columbia, GA, Richmond, GA, Burke, GA, Chesterfield, SC, McCormick, SC, Newberry, SC, Fairfield, SC, Kershaw, SC, Edgefield, SC, Saluda, SC, Lexington, SC, Richland, SC, Lee, SC, Aiken, SC, Sumter, SC, Barnwell, SC, Calhoun, SC, Clarendon, SC, Bamberg, SC, Northern Lancaster, SC, Southern Lancaster, SC, Northwestern Orangeburg, SC, Central Orangeburg, SC, Southeastern Orangeburg, SC
Expires 7:00 PM
42 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
12%
9 AM
28°
29%
10 AM
31°
29%
11 AM
32°
29%
12 PM
33°
32%
1 PM
34°
32%
2 PM
35°
29%
3 PM
34°
35%
4 PM
33°
39%
5 PM
32°
39%
6 PM
32°
39%
7 PM
31°
42%
8 PM
31°
43%
9 PM
29°
40%
10 PM
28°
31%
11 PM
27°
23%
12 AM
27°
15%
1 AM
26°
14%
2 AM
26°
8%
3 AM
25°
14%
4 AM
25°
14%
5 AM
25°
17%
6 AM
24°
19%
7 AM
24°
19%
7-Day Forecast
Today
36° 24°
Partly Cloudy with a 43% chance of rain.
Sun
37° 24°
Rain, 66% chance.
Mon
40° 23°
Partly Cloudy.
Tue
38° 24°
Mostly Clear with a 40% chance of rain.
Wed
37° 22°
Drizzle, 52% chance.
Thu
39° 23°
Rain, 55% chance.
Fri
36° 23°
Drizzle, 90% chance.
TimeTempConditionsPrecipWindHumidity
Now 27° Mostly Clear 12% 3 mph WNW 79%
9 AM 28° Mostly Clear 29% 3 mph WNW 68%
10 AM 31° Mostly Clear 29% 3 mph WNW 61%
11 AM 32° Mostly Clear 29% 2 mph W 55%
12 PM 33° Mostly Clear 32% 2 mph SW 51%
1 PM 34° Mostly Clear 32% 3 mph SSW 48%
2 PM 35° Partly Cloudy 29% 3 mph S 47%
3 PM 34° Partly Cloudy 35% 4 mph NNE 50%
4 PM 33° Mostly Cloudy 39% 6 mph NNE 53%
5 PM 32° Mostly Cloudy 39% 5 mph ENE 55%
6 PM 32° Mostly Cloudy 39% 6 mph ESE 56%
7 PM 31° Mostly Cloudy 42% 4 mph SE 59%
8 PM 31° Partly Cloudy 43% 4 mph SSE 64%
9 PM 29° Partly Cloudy 40% 4 mph SSE 70%
10 PM 28° Partly Cloudy 31% 4 mph SSE 75%
11 PM 27° Partly Cloudy 23% 3 mph S 79%
12 AM 27° Partly Cloudy 15% 2 mph SSW 82%
1 AM 26° Partly Cloudy 14% 2 mph SSW 84%
2 AM 26° Partly Cloudy 8% 2 mph SW 86%
3 AM 25° Partly Cloudy 14% 2 mph WSW 87%
4 AM 25° Partly Cloudy 14% 2 mph WNW 88%
5 AM 25° Partly Cloudy 17% 2 mph NW 88%
6 AM 24° Partly Cloudy 19% 2 mph NNW 87%
7 AM 24° Partly Cloudy 19% 2 mph NE 86%
15-Day Forecast
Today
8/15
Partly Cloudy
43%
24°
36°
Sun
8/16
Rain
66%
24°
37°
Mon
8/17
Partly Cloudy
13%
23°
40°
Tue
8/18
Mostly Clear
40%
24°
38°
Wed
8/19
Drizzle
52%
22°
37°
Thu
8/20
Rain
55%
23°
39°
Fri
8/21
Drizzle
90%
23°
36°
Sat
8/22
Rain
90%
22°
35°
Sun
8/23
Rain
90%
20°
33°
Mon
8/24
Rain
79%
20°
32°
Tue
8/25
Drizzle
66%
21°
34°
Wed
8/26
Drizzle
60%
23°
33°
Thu
8/27
Drizzle
60%
23°
33°
Fri
8/28
Drizzle
60%
22°
33°
Sat
8/29
Drizzle
60%
23°
33°
42
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
42 AQI 7.6 µg/m³
O3
Ground-level ozone
38 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sun 42 Good 38 42
Mon 48 Good 36 48
Tue 54 Moderate 41 54
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 Sat Aug 15, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1079 J/kg
MLCAPE650 J/kg
MUCAPE1079 J/kg
SBCIN-173 J/kg
MLCIN-152 J/kg
Lifted Index-4.0
Kinematics
0–6 km Shear10 kt
0–1 km Shear2 kt
Eff. Shear3 kt
0–1 km SRH-2
0–3 km SRH17
Eff. SRH17
Storm Motion274° @ 16 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.6
Thermo & Levels
PWAT2.16 in
0–3 km LR5.2 °C/km
700–500 LR5.8 °C/km
Total Totals45.4
LCL965 hPa
LFC770 hPa
EL172 hPa
Freezing Lvl15,797 ft