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: 6:15 AM CDT  ·  Refresh
26°C
Feels like 30°
Mostly Clear
▲ 36°  /  ▼ 24°
Wind
4 mph W
Humidity
83%
Dew Point
23°
Pressure
29.91 inHg
Visibility
9 mi
UV Index
2.2
Cloud Cover
18%
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 26°C. Precipitation is likely — peak probability 53% around 3 PM. Atmospheric instability is elevated (CAPE up to 2365 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
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
14%
8 AM
26°
29%
9 AM
28°
29%
10 AM
30°
29%
11 AM
32°
29%
12 PM
33°
32%
1 PM
34°
39%
2 PM
35°
38%
3 PM
34°
52%
4 PM
32°
49%
5 PM
30°
52%
6 PM
32°
48%
7 PM
31°
43%
8 PM
31°
43%
9 PM
29°
41%
10 PM
28°
32%
11 PM
27°
23%
12 AM
27°
15%
1 AM
26°
16%
2 AM
26°
14%
3 AM
26°
20%
4 AM
26°
20%
5 AM
26°
23%
6 AM
24°
28%
7-Day Forecast
Today
36° 24°
Partly Cloudy with a 49% chance of rain.
Sun
37° 24°
Rain, 63% chance.
Mon
40° 23°
Partly Cloudy.
Tue
38° 24°
Clear with a 40% chance of rain.
Wed
37° 22°
Drizzle, 52% chance.
Thu
39° 23°
Rain, 57% chance.
Fri
36° 23°
Rain, 90% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Mostly Clear 14% 4 mph W 83%
8 AM 26° Mostly Clear 29% 4 mph WNW 77%
9 AM 28° Mostly Clear 29% 4 mph WNW 69%
10 AM 30° Mostly Clear 29% 3 mph WNW 62%
11 AM 32° Mostly Clear 29% 3 mph W 56%
12 PM 33° Mostly Clear 32% 3 mph WSW 52%
1 PM 34° Mostly Clear 39% 3 mph SW 49%
2 PM 35° Partly Cloudy 38% 4 mph WSW 48%
3 PM 34° Partly Cloudy 52% 4 mph NNE 52%
4 PM 32° Mostly Cloudy 49% 5 mph NE 54%
5 PM 30° Rain 52% 5 mph ENE 56%
6 PM 32° Overcast 48% 4 mph E 57%
7 PM 31° Overcast 43% 4 mph SE 60%
8 PM 31° Mostly Cloudy 43% 4 mph SSE 66%
9 PM 29° Mostly Cloudy 41% 4 mph SSE 71%
10 PM 28° Partly Cloudy 32% 4 mph SSE 76%
11 PM 27° Partly Cloudy 23% 3 mph S 80%
12 AM 27° Partly Cloudy 15% 3 mph S 82%
1 AM 26° Partly Cloudy 16% 3 mph SSW 84%
2 AM 26° Partly Cloudy 14% 3 mph SSW 86%
3 AM 26° Partly Cloudy 20% 2 mph SW 87%
4 AM 26° Partly Cloudy 20% 3 mph WSW 88%
5 AM 26° Partly Cloudy 23% 3 mph WNW 88%
6 AM 24° Partly Cloudy 28% 2 mph ESE 88%
15-Day Forecast
Today
8/15
Partly Cloudy
49%
24°
36°
Sun
8/16
Rain
63%
24°
37°
Mon
8/17
Partly Cloudy
13%
23°
40°
Tue
8/18
Clear
40%
24°
38°
Wed
8/19
Drizzle
52%
22°
37°
Thu
8/20
Rain
57%
23°
39°
Fri
8/21
Rain
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
64%
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°
48
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
48 AQI 8.7 µg/m³
O3
Ground-level ozone
41 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 48 Good 41 48
Sun 48 Good 41 48
Mon 51 Moderate 38 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 Sat Aug 15, 10:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE672 J/kg
MLCAPE740 J/kg
MUCAPE879 J/kg
SBCIN-212 J/kg
MLCIN-138 J/kg
Lifted Index-3.4
Kinematics
0–6 km Shear8 kt
0–1 km Shear5 kt
Eff. Shear6 kt
0–1 km SRH-15
0–3 km SRH6
Eff. SRH6
Storm Motion275° @ 17 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.2
Thermo & Levels
PWAT2.23 in
0–3 km LR4.8 °C/km
700–500 LR6.0 °C/km
Total Totals47.1
LCL975 hPa
LFC729 hPa
EL215 hPa
Freezing Lvl15,689 ft