Sumter 7-day weather forecast

Written by:
June 8, 2026
ESOlex // Shutterstock

Sumter 7-day weather forecast

Stacker created the forecast for Sumter, South Carolina using data from OpenWeather. This week's high is 105 °F on Sunday, while the low is 74 °F on Tuesday. There are expected to be 6 sunny days and rain on 5 days this week.

There are currently no weather alerts.

Monday, July 6

- High of 92 °F, low of 75 °F (37% humidity)
- Sunny with a 99% chance of rain (2 mm of rain)
- Very high risk of harm from sun exposure (10 UV index)
- Gentle breeze (11 mph wind)
- Sunrise at 6:16 AM, sunset at 8:35 PM
1 / 6
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Tuesday, July 7

- High of 92 °F, low of 74 °F (36% humidity)
- Fair with a 69% chance of rain (2 mm of rain)
- Very high risk of harm from sun exposure (10 UV index)
- Gentle breeze (11 mph wind)
- Sunrise at 6:16 AM, sunset at 8:35 PM
- Last quarter moon
2 / 6
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Wednesday, July 8

- High of 103 °F, low of 77 °F (28% humidity)
- Sunny with a 0% chance of rain
- Very high risk of harm from sun exposure (10 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 6:17 AM, sunset at 8:35 PM
3 / 6
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Thursday, July 9

- High of 99 °F, low of 80 °F (36% humidity)
- Fair with a 34% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (10 UV index)
- Moderate breeze (16 mph wind)
- Sunrise at 6:17 AM, sunset at 8:35 PM
4 / 6
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Friday, July 10

- High of 103 °F, low of 79 °F (26% humidity)
- Mostly sunny with a 0% chance of rain
- Moderate breeze (15 mph wind)
- Sunrise at 6:18 AM, sunset at 8:34 PM
5 / 6
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Saturday, July 11

- High of 104 °F, low of 78 °F (25% humidity)
- Partly cloudy with a 91% chance of rain (2 mm of rain)
- Gentle breeze (9 mph wind)
- Sunrise at 6:18 AM, sunset at 8:34 PM
6 / 6
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Sunday, July 12

- High of 105 °F, low of 76 °F (23% humidity)
- Sunny with a 32% chance of rain (0 mm of rain)
- Moderate breeze (16 mph wind)
- Sunrise at 6:19 AM, sunset at 8:34 PM

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