Sumter 7-day weather forecast

Written by:
September 8, 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 88 °F on Friday, while the low is 60 °F on Tuesday. There are expected to be 3 sunny days and rain on 1 day this week.

There are currently no weather alerts.

Monday, September 8

- High of 82 °F, low of 64 °F (42% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 7:00 AM, sunset at 7:38 PM
1 / 6
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Tuesday, September 9

- High of 76 °F, low of 60 °F (47% humidity)
- Overcast with a 100% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (16 mph wind)
- Sunrise at 7:00 AM, sunset at 7:36 PM
2 / 6
Stepan Bessmelnitsin // Shutterstock

Wednesday, September 10

- High of 86 °F, low of 61 °F (40% humidity)
- Partly sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 7:01 AM, sunset at 7:35 PM
3 / 6
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Thursday, September 11

- High of 87 °F, low of 63 °F (30% humidity)
- Mostly cloudy with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (8 mph wind)
- Sunrise at 7:02 AM, sunset at 7:33 PM
4 / 6
Andrzej Kubik // Shutterstock

Friday, September 12

- High of 88 °F, low of 64 °F (29% humidity)
- Sunny with a 0% chance of rain
- Gentle breeze (10 mph wind)
- Sunrise at 7:02 AM, sunset at 7:32 PM
5 / 6
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Saturday, September 13

- High of 85 °F, low of 62 °F (30% humidity)
- Sunny with a 0% chance of rain
- Moderate breeze (13 mph wind)
- Sunrise at 7:03 AM, sunset at 7:31 PM
6 / 6
Andrew Lever // Shutterstock

Sunday, September 14

- High of 87 °F, low of 63 °F (32% humidity)
- Mostly cloudy with a 0% chance of rain
- Gentle breeze (8 mph wind)
- Sunrise at 7:04 AM, sunset at 7:29 PM
- Last quarter moon

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