Sumter, SC Weather Forecast
Local 7-day forecast
Chance Rain Showers then Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sumter, SC in one place.
A chance of rain showers before 11am. Partly sunny, with a high near 87. Southwest wind 6 to 9 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Sumter, SC is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jun 17, 2026 9:44 AM EDT.
The active forecast window currently covers Jun 17 to Jun 23, 2026 for Sumter, SC.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 17 to Jun 23, 2026
- Latest sync
- Jun 17, 2026 9:44 AM EDT
- Forecast office
- CAE
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumter
Monday looks like the warmest upcoming period in Sumter at 93 degrees F.
Saturday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Thursday at about 10 to 15 mph SW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 17, 2026 9:44 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- CAE
- Radar station
- KCAE
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 73. Southwest wind 6 to 9 mph.
A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 91. Heat index values as high as 101. Southwest wind 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 8pm, then showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind 7 to 13 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers before 11am, then showers and thunderstorms likely. Mostly cloudy, with a high near 88. Southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms likely before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers and thunderstorms between 11pm and 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 89.
Mostly clear, with a low around 68.
Sunny, with a high near 92.
Partly cloudy, with a low around 72.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. Chance of precipitation is 30%.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 71.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jun 17
|
Chance Rain Showers then Partly Sunny
|
87°F |
6 to 9 mph
SW
|
|
Tonight
Jun 17
|
Mostly Clear
|
73°F |
6 to 9 mph
SW
|
|
Thursday
Jun 18
|
Mostly Sunny then Chance Showers And Thunderstorms
|
91°F |
10 to 15 mph
SW
|
|
Thursday Night
Jun 18
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
71°F |
7 to 13 mph
SW
|
|
Juneteenth
Jun 19
|
Showers And Thunderstorms Likely
|
88°F |
10 mph
SW
|
|
Friday Night
Jun 19
|
Showers And Thunderstorms Likely
|
70°F |
2 to 9 mph
W
|
|
Saturday
Jun 20
|
Mostly Sunny
|
89°F |
2 to 6 mph
N
|
|
Saturday Night
Jun 20
|
Mostly Clear
|
68°F |
1 mph
NW
|
|
Sunday
Jun 21
|
Sunny
|
92°F |
0 to 6 mph
SW
|
|
Sunday Night
Jun 21
|
Partly Cloudy
|
72°F |
6 mph
S
|
|
Monday
Jun 22
|
Mostly Sunny then Chance Showers And Thunderstorms
|
93°F |
6 to 13 mph
SW
|
|
Monday Night
Jun 22
|
Chance Showers And Thunderstorms
|
74°F |
6 to 10 mph
W
|
|
Tuesday
Jun 23
|
Mostly Sunny then Chance Showers And Thunderstorms
|
93°F |
6 to 9 mph
NW
|
|
Tuesday Night
Jun 23
|
Chance Showers And Thunderstorms
|
71°F |
1 to 6 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumter.
