Sumter, SC Weather Forecast

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Sumter, SC Weather Forecast

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Sumter SC weather  - Clear - 69°F
Clear
69°F
Updated 3:54 am
Feels Like 71°F
Humidity 85%
Wind NE 5 mph
Barometer  30.16 in
Dew Point 65°F
Sumter SC weather  - Clear - 21°C
Clear
21°C
Updated 3:54 am
Feels Like 22°C
Humidity 85%
Wind NE 8 km/h
Barometer  102.1 kPa
Dew Point 18°C

Sumter Weather Forecast

TODAY TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT
Sumter, SC Weather - Today Sunny Sumter, SC Weather - Tonight Mostly Clear Sumter, SC Weather - Wednesday Sunny Sumter, SC Weather - Wednesday Night Mostly Clear Sumter, SC Weather - Thursday Mostly Sunny Sumter, SC Weather - Thursday Night Partly Cloudy Sumter, SC Weather - Friday Chance Of T-Storm Sumter, SC Weather - Friday Night Chance Of T-Storm Sumter, SC Weather - Saturday Chance Of T-Storm Sumter, SC Weather - Saturday Night Chance Of T-Storm Sumter, SC Weather - Sunday Chance Of T-Storm Sumter, SC Weather - Sunday Night Chance Of T-Storm
Sunny Mostly Clear Sunny Mostly Clear Mostly Sunny Partly Cloudy Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm
Hi: 90°FHi: 32°C
Lo: 69°FLo: 21°C Hi: 91°FHi: 33°C
Lo: 70°FLo: 21°C Hi: 91°FHi: 33°C
Lo: 71°FLo: 22°C Hi: 95°FHi: 35°C
Lo: 71°FLo: 22°C Hi: 91°FHi: 33°C
Lo: 71°FLo: 22°C Hi: 91°FHi: 33°C
Lo: 71°FLo: 22°C
POP: 50% POP: 50% POP: 70% POP: 70% POP: 40% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 307 AM EDT Tue Sep 08 2026 Sumter, SC Weather - WeatherWorld.com

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Sumter Forecast Discussion

Meteorlogic Glosserator
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Issued: 1257 AM EDT Tue Sep 8 2026

Key Messages

  • 1. Slightly above average temperatures with chances for afternoon storms the second half of the week.

Discussion

... KEY MESSAGE 1. Slightly above average temperatures with chances for afternoon storms the second half of the week.

Drier air with dewpoints in the low to mid-60s have ushered in behind the cold front. Expect relatively quick recovery with high pressure offshore and strengthening ridging aloft over the central CONUS moving back into the area. While ensemble guidance does no...