National Weather Service United States Department of Commerce

Oppressive heat and humidity building into the central and southeast U.S.

A heat wave is building into parts of the central and southeast U.S. this week. The combination of heat and humidity will lead to dangerous heat indices, especially in parts of the central Mississippi River Valley where an Excessive Heat Warning is in effect. Heat Advisories are in effect elsewhere across the region. Relief is not expected for several days.
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Current Conditions

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Sumter SC

7 Day Forecast

For More Weather Information:

Columbia, SC Local Forecast Office

Today

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 99 °F

Tonight

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 74 °F

Friday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 100 °F

Friday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 73 °F

Saturday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 94 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

Low: 72 °F

Sunday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 88 °F

Sunday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 69 °F

Monday

Partly Sunny

Partly
Sunny

High: 87 °F

Detailed Forecast

  • Today A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 20%.
  • Tonight A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 74. Light and variable wind. Chance of precipitation is 20%.
  • Friday A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. Heat index values as high as 107. Light west wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 20%.
  • Friday Night A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light west wind. Chance of precipitation is 20%.
  • Saturday A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 94. Calm wind becoming north 5 to 7 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
  • Saturday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
  • Sunday A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 30%.
  • Sunday Night Mostly cloudy, with a low around 69.
  • Monday Partly sunny, with a high near 87.
  • Monday Night Partly cloudy, with a low around 69.
  • Tuesday Mostly sunny, with a high near 88.
  • Tuesday Night Partly cloudy, with a low around 69.
  • Wednesday Mostly sunny, with a high near 89.