Sumter County, South Carolina, United States

Last updated: 8:27 PM CDT · Refresh

23°C

Feels like 26°

Overcast

▲ 34° / ▼ 21°

Wind

6 mph SE

Humidity

93%

Dew Point

22°

Pressure

29.83 inHg

Visibility

10 mi

UV Index

0.0

Cloud Cover

97%

Sunrise

6:47 AM

Sunset

8:00 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Sumter County is currently overcast at 23°C. Precipitation is likely — peak probability 73% around 9 PM. Atmospheric instability is elevated (CAPE up to 1792 J/kg) — isolated convective development possible. Sunrise: 6:47AM · Sunset: 8:00PM.

52 AQI · Moderate Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

23°

72%

10 PM

23°

63%

11 PM

23°

29%

12 AM

23°

39%

1 AM

23°

30%

2 AM

23°

23%

3 AM

23°

23%

4 AM

22°

20%

5 AM

21°

32%

6 AM

21°

36%

7 AM

21°

25%

8 AM

21°

44%

9 AM

23°

37%

10 AM

24°

41%

11 AM

25°

40%

12 PM

26°

44%

1 PM

29°

44%

2 PM

29°

49%

3 PM

29°

50%

4 PM

31°

47%

5 PM

30°

48%

6 PM

29°

38%

7 PM

28°

39%

8 PM

28°

27%

7-Day Forecast

Tonight

34° 21°

Overcast with a 72% chance of rain.

Sat

33° 21°

Partly Cloudy with a 50% chance of rain.

Sun

34° 21°

Partly Cloudy with a 21% chance of rain.

Mon

33° 20°

Partly Cloudy with a 52% chance of rain.

Tue

32° 21°

Drizzle, 51% chance.

Wed

34° 22°

Heavy Rain, 82% chance.

Thu

33° 20°

Rain, 82% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 23° Overcast 72% 6 mph SE 93%

10 PM 23° Overcast 63% 6 mph ESE 91%

11 PM 23° Overcast 29% 5 mph SE 92%

12 AM 23° Overcast 39% 2 mph ESE 94%

1 AM 23° Mostly Cloudy 30% 3 mph N 95%

2 AM 23° Mostly Cloudy 23% 3 mph N 96%

3 AM 23° Overcast 23% 2 mph ENE 96%

4 AM 22° Overcast 20% 3 mph E 96%

5 AM 21° Fog 32% 2 mph E 96%

6 AM 21° Mostly Cloudy 36% 2 mph SE 95%

7 AM 21° Partly Cloudy 25% 2 mph N 94%

8 AM 21° Partly Cloudy 44% 3 mph W 91%

9 AM 23° Partly Cloudy 37% 4 mph WSW 85%

10 AM 24° Partly Cloudy 41% 4 mph WSW 78%

11 AM 25° Partly Cloudy 40% 4 mph WSW 74%

12 PM 26° Partly Cloudy 44% 4 mph WSW 71%

1 PM 29° Partly Cloudy 44% 5 mph WSW 69%

2 PM 29° Partly Cloudy 49% 5 mph WSW 67%

3 PM 29° Partly Cloudy 50% 6 mph SW 66%

4 PM 31° Partly Cloudy 47% 6 mph SW 64%

5 PM 30° Partly Cloudy 48% 6 mph SW 65%

6 PM 29° Mostly Clear 38% 5 mph SSW 68%

7 PM 28° Mostly Clear 39% 5 mph SSW 72%

8 PM 28° Mostly Clear 27% 5 mph SSW 76%

15-Day Forecast

Today

8/21

Overcast

72%

21°

34°

Sat

8/22

Partly Cloudy

50%

21°

33°

Sun

8/23

Partly Cloudy

21%

21°

34°

Mon

8/24

Partly Cloudy

52%

20°

33°

Tue

8/25

Drizzle

51%

21°

32°

Wed

8/26

Heavy Rain

82%

22°

34°

Thu

8/27

Rain

82%

20°

33°

Fri

8/28

Rain

72%

23°

33°

Sat

8/29

Rain

69%

23°

35°

Sun

8/30

Rain

68%

20°

34°

Mon

8/31

Drizzle

60%

22°

37°

Tue

9/1

Drizzle

60%

23°

36°

Wed

9/2

Drizzle

60%

23°

34°

Thu

9/3

Drizzle

60%

23°

34°

Fri

9/4

Drizzle

60%

22°

34°

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

PM_2.5

Fine particulate matter

Dominant

52 AQI 9.6 µg/m³

O₃

Ground-level ozone

41 AQI 44 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Today 52 Moderate 41 52

Sun 40 Good 40 38

Mon 42 Good 38 42

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. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Fri Aug 21, 23:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE302 J/kg

MLCAPE845 J/kg

MUCAPE1330 J/kg

SBCIN-138 J/kg

MLCIN-55 J/kg

Lifted Index-1.7

Kinematics

0–6 km Shear16 kt

0–1 km Shear7 kt

Eff. Shear17 kt

0–1 km SRH39

0–3 km SRH58

Eff. SRH58

Storm Motion305° @ 12 kt

0–1 km EHI0.1

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index34.4

Thermo & Levels

PWAT2.25 in

0–3 km LR4.8 °C/km

700–500 LR5.4 °C/km

Total Totals43.6

LCL994 hPa

LFC744 hPa

EL350 hPa

Freezing Lvl14,551 ft

Sumter County, South Carolina, United States

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