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Sumter SC Weather - Mostly Clear - 89°F
Mostly Clear
89°F
Updated 5:03 pm
Feels Like 87°F
Humidity 43%
Wind ENE 13 mph
Barometer  30.03 in
Dew Point 64°F
Sumter SC Weather - Mostly Clear - 32°C
Mostly Clear
32°C
Updated 5:03 pm
Feels Like 30°C
Humidity 43%
Wind ENE 21 km/h
Barometer  101.7 kPa
Dew Point 18°C
Sumter, SC Weather and Current Conditionssumter sc weather forecast

Sumter, SC Weather Forecast

Sumter South Carolina WeatherSumter, South Carolina Weather Weather Forecast
14 day API weather forecast for Sumter, South Carolina. Note: The 7-day weather forecast for Sumter, SC is the most reliable and accurate weather forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days ahead.
Sumter, SC Weather Forecast Dated: 503 PM Mon Sep 07 2026
Expect a hot stretch with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate. Isolated storms at times.

Monday, September 7, 2026

Mid-Morning
Sumter Weather - 2026-09-07 - Morning - Sunny
74°F 23°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-07 - Afternoon - Sunny
92°F 33°C
Sunny
Early-Evening
Sumter Weather - 2026-09-07 - Evening - Sunny
84°F 29°C
Sunny
Very hot with temperatures reaching 92°F 33°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the ENE to the SE at 9 mph 15 km/h.

Tuesday, September 8, 2026

Mid-Morning
Sumter Weather - 2026-09-08 - Morning - Sunny
74°F 23°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-08 - Afternoon - Overcast
89°F 32°C
Overcast
Early-Evening
Sumter Weather - 2026-09-08 - Evening - Overcast
82°F 28°C
Overcast
Balmy with temperatures reaching 89°F 32°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the ENE to the E at 8 mph 13 km/h.

Wednesday, September 9, 2026

Mid-Morning
Sumter Weather - 2026-09-09 - Morning - Overcast
73°F 23°C
Overcast
Mid-Afternoon
Sumter Weather - 2026-09-09 - Afternoon - Sunny
86°F 30°C
Sunny
Early-Evening
Sumter Weather - 2026-09-09 - Evening - Sunny
80°F 27°C
Sunny
Quite warm around 86°F 30°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling.

Thursday, September 10, 2026

Mid-Morning
Sumter Weather - 2026-09-10 - Morning - Cloudy
76°F 25°C
Cloudy
Mid-Afternoon
Sumter Weather - 2026-09-10 - Afternoon - Overcast
91°F 33°C
Overcast
Early-Evening
Sumter Weather - 2026-09-10 - Evening - Cloudy
85°F 29°C
Cloudy
Sizzling hot near 91°F 33°C with a heat index reaching 94°F 34°C, cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling.

Friday, September 11, 2026

Mid-Morning
Sumter Weather - 2026-09-11 - Morning - Sunny
76°F 25°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-11 - Afternoon - Overcast
88°F 31°C
Overcast
Early-Evening
Sumter Weather - 2026-09-11 - Evening - Sunny
82°F 28°C
Sunny
Quite warm reaching 88°F 31°C, feeling like 93°F 34°C during peak afternoon, sunny in the morning, overcast in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds moving from the NE to the SE at 10 mph 16 km/h.

Saturday, September 12, 2026

Mid-Morning
Sumter Weather - 2026-09-12 - Morning - Sunny
78°F 26°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-12 - Afternoon - Light Showers
92°F 33°C
Light Showers
Early-Evening
Sumter Weather - 2026-09-12 - Evening - Overcast
81°F 27°C
Overcast
Very hot with a high of 92°F 33°C, feeling closer to 97°F 36°C in the humidity, dry early, with showers developing in the afternoon, with steady humidity and steady pressure. A stray shower or storm late in the day.

Sunday, September 13, 2026

Mid-Morning
Sumter Weather - 2026-09-13 - Morning - Sunny
79°F 26°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-13 - Afternoon - Overcast
93°F 34°C
Overcast
Early-Evening
Sumter Weather - 2026-09-13 - Evening - Overcast
84°F 29°C
Overcast
Sizzling hot near 93°F 34°C with a heat index reaching 101°F 38°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.

Monday, September 14, 2026

Mid-Morning
Sumter Weather - 2026-09-14 - Morning - Overcast
78°F 26°C
Overcast
Mid-Afternoon
Sumter Weather - 2026-09-14 - Afternoon - Overcast
92°F 33°C
Overcast
Early-Evening
Sumter Weather - 2026-09-14 - Evening - Light Showers
89°F 32°C
Light Showers
Hot and sweltering around 92°F 33°C (heat index 98°F 37°C), mainly dry until evening showers arrive, with lower humidity and steady pressure. Thunderstorms possible in the afternoon and evening.

Tuesday, September 15, 2026

Mid-Morning
Sumter Weather - 2026-09-15 - Morning - Sunny
83°F 29°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-15 - Afternoon - Overcast
97°F 36°C
Overcast
Early-Evening
Sumter Weather - 2026-09-15 - Evening - Overcast
88°F 31°C
Overcast
Very hot with a high of 97°F 36°C, feeling closer to 102°F 39°C in the humidity, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.

Wednesday, September 16, 2026

Mid-Morning
Sumter Weather - 2026-09-16 - Morning - Sunny
84°F 29°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-16 - Afternoon - Partly Cloudy
98°F 37°C
Partly Cloudy
Early-Evening
Sumter Weather - 2026-09-16 - Evening - Light Showers
76°F 25°C
Light Showers
Sizzling hot near 98°F 37°C with a heat index reaching 102°F 39°C, drier conditions through late afternoon before showers move in, with increasing humidity and steady pressure. Winds swinging from the WSW to the NE at 12 mph 19 km/h. Gusts up to 20 mph 32 km/h.

Thursday, September 17, 2026

Mid-Morning
Sumter Weather - 2026-09-17 - Morning - Scattered Showers
64°F 18°C
Scattered Showers
Mid-Afternoon
Sumter Weather - 2026-09-17 - Afternoon - Overcast
70°F 21°C
Overcast
Early-Evening
Sumter Weather - 2026-09-17 - Evening - Scattered Showers
68°F 20°C
Scattered Showers
Pleasant near 70°F 21°C, scattered downpours possible, with lower humidity and steady pressure. Winds shifting from the NE to the NNE at 7 mph 11 km/h.

Friday, September 18, 2026

Mid-Morning
Sumter Weather - 2026-09-18 - Morning - Overcast
67°F 20°C
Overcast
Mid-Afternoon
Sumter Weather - 2026-09-18 - Afternoon - Overcast
81°F 27°C
Overcast
Early-Evening
Sumter Weather - 2026-09-18 - Evening - Overcast
76°F 25°C
Overcast
Balmy with temperatures reaching 81°F 27°C, overcast throughout the day, with lower humidity and barometric pressure falling. Winds NE at 7 mph 12 km/h.

Saturday, September 19, 2026

Mid-Morning
Sumter Weather - 2026-09-19 - Morning - Sunny
70°F 21°C
Sunny
Mid-Afternoon
Sumter Weather - 2026-09-19 - Afternoon - Sunny
85°F 29°C
Sunny
Early-Evening
Sumter Weather - 2026-09-19 - Evening - Overcast
79°F 26°C
Overcast
Quite warm around 85°F 29°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds switching from the NNE to the NE at 4 mph 6 km/h.

Sunday, September 20, 2026

Mid-Morning
Sumter Weather - 2026-09-20 - Morning - Overcast
71°F 22°C
Overcast
Mid-Afternoon
Sumter Weather - 2026-09-20 - Afternoon - Overcast
87°F 30°C
Overcast
Early-Evening
Sumter Weather - 2026-09-20 - Evening - Overcast
81°F 27°C
Overcast
Warm temperatures up to 87°F 30°C, overcast throughout the day, with lower humidity and steady pressure.

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Weather by the Numbers

Mon, 7th
Sumter SC Weather - Monday, Sep 7, 2026 - Sunny
Hi: 92°F 33°C
Lo: 70°F 21°C
Sunrise 07:00 AM
Sunset 07:40 PM
Wind ENE 12 mph19 km/h
Dew Point 65°F19°C
uv Index 7
Barometric Pressure 30.03 in1017 mb
POP 1% *
Humidity 46%
Tue, 8th
Sumter SC Weather - Tuesday, Sep 8, 2026 - Partly Cloudy
Hi: 89°F 32°C
Lo: 67°F 20°C
Sunrise 07:00 AM
Sunset 07:38 PM
Wind ENE 11 mph17 km/h
Dew Point 56°F13°C
uv Index 7
Barometric Pressure 30.24 in1024 mb
POP 3% *
Humidity 37%
Wed, 9th
Sumter SC Weather - Wednesday, Sep 9, 2026 - Sunny
Hi: 86°F 30°C
Lo: 69°F 21°C
Sunrise 07:01 AM
Sunset 07:37 PM
Wind E 8 mph12 km/h
Dew Point 65°F18°C
uv Index 7
Barometric Pressure 30.27 in1025 mb
POP 3% *
Humidity 57%
Thu, 10th
Sumter SC Weather - Thursday, Sep 10, 2026 - Sunny
Hi: 91°F 33°C
Lo: 70°F 21°C
Sunrise 07:02 AM
Sunset 07:36 PM
Wind SE 1 mph1 km/h
Dew Point 68°F20°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 2% *
Humidity 51%
Fri, 11th
Sumter SC Weather - Friday, Sep 11, 2026 - Sunny
Hi: 96°F 35°C
Lo: 72°F 22°C
Sunrise 07:03 AM
Sunset 07:34 PM
Wind WSW 6 mph10 km/h
Dew Point 66°F19°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 1% *
Humidity 41%
Sat, 12th
Sumter SC Weather - Saturday, Sep 12, 2026 - Partly Cloudy
Hi: 96°F 36°C
Lo: 72°F 22°C
Sunrise 07:03 AM
Sunset 07:33 PM
Wind SE 4 mph7 km/h
Dew Point 70°F21°C
uv Index 8
Barometric Pressure 30.03 in1017 mb
POP 3% *
Humidity 53%
Sun, 13th
Sumter SC Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 96°F 35°C
Lo: 74°F 23°C
Sunrise 07:04 AM
Sunset 07:31 PM
Wind WNW 1 mph2 km/h
Dew Point 71°F22°C
uv Index 7
Barometric Pressure 30.09 in1019 mb
POP 4% *
Humidity 55%
Mon, 14th
Sumter SC Weather - Monday, Sep 14, 2026 - Overcast
Hi: 95°F 35°C
Lo: 76°F 25°C
Sunrise 07:05 AM
Sunset 07:30 PM
Wind SW 5 mph8 km/h
Dew Point 72°F22°C
uv Index 6
Barometric Pressure 30.09 in1019 mb
POP 17% *
Humidity 68%
Tue, 15th
Sumter SC Weather - Tuesday, Sep 15, 2026 - Overcast
Hi: 99°F 37°C
Lo: 79°F 26°C
Sunrise 07:05 AM
Sunset 07:29 PM
Wind W 6 mph9 km/h
Dew Point 67°F20°C
uv Index 7
Barometric Pressure 30.03 in1017 mb
POP 3% *
Humidity 42%
Wed, 16th
Sumter SC Weather - Wednesday, Sep 16, 2026 - Cloudy
Hi: 99°F 37°C
Lo: 65°F 18°C
Sunrise 07:06 AM
Sunset 07:27 PM
Wind W 10 mph16 km/h
Dew Point 65°F19°C
uv Index 8
Barometric Pressure 30 in1016 mb
POP 2% *
Humidity 38%
Thu, 17th
Sumter SC Weather - Thursday, Sep 17, 2026 - Patchy Rain Nearby
Hi: 70°F 21°C
Lo: 64°F 18°C
Sunrise 07:07 AM
Sunset 07:26 PM
Wind NE 8 mph12 km/h
Dew Point 63°F17°C
uv Index 4
Barometric Pressure 30.06 in1018 mb
POP 27% *
Humidity 87%
Fri, 18th
Sumter SC Weather - Friday, Sep 18, 2026 - Overcast
Hi: 82°F 28°C
Lo: 65°F 18°C
Sunrise 07:07 AM
Sunset 07:24 PM
Wind NE 11 mph18 km/h
Dew Point 51°F11°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 10% *
Humidity 44%
Sat, 19th
Sumter SC Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 85°F 30°C
Lo: 66°F 19°C
Sunrise 07:08 AM
Sunset 07:23 PM
Wind NE 9 mph14 km/h
Dew Point 61°F16°C
uv Index 7
Barometric Pressure 30.12 in1020 mb
POP 2% *
Humidity 53%
Sun, 20th
Sumter SC Weather - Sunday, Sep 20, 2026 - Overcast
Hi: 87°F 31°C
Lo: 67°F 19°C
Sunrise 07:09 AM
Sunset 07:22 PM
Wind NNE 6 mph9 km/h
Dew Point 52°F11°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 10% *
Humidity 37%
* POP = Probability of Precipitation. Data for 12:00 PM.