Sumter 7-day weather forecast

Written by:
December 29, 2025
ESOlex // Shutterstock

Sumter 7-day weather forecast

Stacker created the forecast for Sumter, South Carolina using data from OpenWeather. This week's high is 58 °F on Tuesday, while the low is 26 °F on Friday. There are expected to be 4 sunny days and rain on 1 day this week.

There are currently no weather alerts.

Monday, January 12

- High of 51 °F, low of 32 °F (33% humidity)
- Partly cloudy with a 0% chance of rain
- Moderate risk of harm from sun exposure (3 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 7:26 AM, sunset at 5:32 PM
1 / 6
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Tuesday, January 13

- High of 58 °F, low of 36 °F (26% humidity)
- Mostly sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (3 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 7:26 AM, sunset at 5:33 PM
2 / 6
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Wednesday, January 14

- High of 52 °F, low of 42 °F (71% humidity)
- Overcast with a 91% chance of rain (1 mm of rain)
- Moderate breeze (14 mph wind)
- Sunrise at 7:26 AM, sunset at 5:33 PM
3 / 6
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Thursday, January 15

- High of 49 °F, low of 29 °F (27% humidity)
- Mostly sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (2 UV index)
- Moderate breeze (17 mph wind)
- Sunrise at 7:26 AM, sunset at 5:34 PM
4 / 6
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Friday, January 16

- High of 45 °F, low of 26 °F (22% humidity)
- Sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (3 UV index)
- Moderate breeze (13 mph wind)
- Sunrise at 7:26 AM, sunset at 5:35 PM
5 / 6
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Saturday, January 17

- High of 52 °F, low of 30 °F (22% humidity)
- Partly sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (3 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 7:25 AM, sunset at 5:36 PM
6 / 6
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Sunday, January 18

- High of 41 °F, low of 27 °F (18% humidity)
- Sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (3 UV index)
- Fresh breeze (20 mph wind)
- Sunrise at 7:25 AM, sunset at 5:37 PM
- New moon

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