National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Current conditions at

Shaw Air Force Base (KSSC)

Lat: 33.97°NLon: 80.48°WElev: 243ft.

Mostly Cloudy

78°F

26°C

Humidity 66%
Wind Speed SW 14 G 23 mph
Barometer 29.92 in (1013.1 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 11 Oct 11:55 am EDT
Extended Forecast for

Sumter SC

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 77. Southwest wind 13 to 15 mph.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 63. Southwest wind around 9 mph.

    Low: 63 °F

    Decreasing
    Clouds

  • Columbus Day

    Columbus Day: Sunny, with a high near 83. Northwest wind 6 to 10 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. Light north wind.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Calm wind.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 77. Southwest wind 13 to 15 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 63. Southwest wind around 9 mph.
Columbus Day
Sunny, with a high near 83. Northwest wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 59. Light north wind.
Tuesday
Sunny, with a high near 86. Calm wind.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Clear, with a low around 63.
Thursday
Sunny, with a high near 89.
Thursday Night
Clear, with a low around 64.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 60.
Saturday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sumter SC
 33.94°N 80.37°W (Elev. 180 ft)
Last Update:
12:46 pm EDT Oct 11, 2026
Forecast Valid:
12pm EDT Oct 11, 2026-6pm EDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation