Weather forecast for 10 daysSumter, SC

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 63°F
  • 43°F
AM Showers
AM Showers
  • Precip. probability: 32%
  • Precipitation: 0.04"
  • Wind: 16mphN 1°
  • Humidity: 75%
  • UV index: 5
  • Sunrise: 7:28 am EDT
  • Sunset: 6:45 pm EDT
  • ▼
Today, in Sumter, scattered morning showers will bring brief periods of rain.
Minimal precipitation is forecasted. The anticipated temperature range extends from a high of a comfortable 62.6°F to a low of a brisk 42.8°F.
Today, temperatures will feel colder as the forecast mirrors November's average high rather than October's.
Sunrise was at 7:28 am and sunset will be at 6:45 pm; the daylight will last for 11h and 17min.

Sunday Oct 18, 2026

  • 66°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 14mphNNE 26°
  • Humidity: 45%
  • UV index: 6
  • Sunrise: 7:28 am EDT
  • Sunset: 6:43 pm EDT
  • ▼
On Sunday, October 18, sunny and dry conditions are also anticipated.
Rainfall is not predicted for tomorrow. The maximum temperature will be a comfortable 66.2°F, while the minimum forecasted temperature is a frosty 44.6°F.
The forecast high is lower and more aligned with what is typical in November than in October.
Sunrise will be at 7:28 am and sunset at 6:43 pm; tomorrow's daylight will last for 11h and 15min.

10-day overview

Daily temperatures

Maximum temperature: 77°C.
Coldest day: today 63°C.

Chance of precipitation

Highest chance: today 32%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 63°F
  • 43°F
AM Showers
AM Showers
  • Precip. probability: 32%
  • Precipitation: 0.04"
  • Wind: 16mphN 1°
  • Humidity: 75%
  • UV index: 5
  • Sunrise: 7:28 am EDT
  • Sunset: 6:45 pm EDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 66°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 14mphNNE 26°
  • Humidity: 45%
  • UV index: 6
  • Sunrise: 7:28 am EDT
  • Sunset: 6:43 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 70°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 12mphN 8°
  • Humidity: 48%
  • UV index: 6
  • Sunrise: 7:29 am EDT
  • Sunset: 6:42 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 77°F
  • 48°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 11mphN 359°
  • Humidity: 39%
  • UV index: 6
  • Sunrise: 7:30 am EDT
  • Sunset: 6:41 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 77°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 10mphN 1°
  • Humidity: 44%
  • UV index: 6
  • Sunrise: 7:31 am EDT
  • Sunset: 6:40 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 77°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 8mphNNW 348°
  • Humidity: 50%
  • UV index: 6
  • Sunrise: 7:32 am EDT
  • Sunset: 6:39 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 75°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 7mphN 9°
  • Humidity: 51%
  • UV index: 5
  • Sunrise: 7:33 am EDT
  • Sunset: 6:38 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 75°F
  • 48°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 9mphNNE 14°
  • Humidity: 55%
  • UV index: 5
  • Sunrise: 7:33 am EDT
  • Sunset: 6:37 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 73°F
  • 46°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 12%
  • Precipitation: 0"
  • Wind: 9mphN 3°
  • Humidity: 60%
  • UV index: 5
  • Sunrise: 7:34 am EDT
  • Sunset: 6:35 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 77°F
  • 50°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 6mphNNW 338°
  • Humidity: 63%
  • UV index: 5
  • Sunrise: 7:35 am EDT
  • Sunset: 6:34 pm EDT
  • ▼
Over the next ten days, a mix of primarily clear and occasionally rain-filled and cloud-filled weather is expected.
With a 32% probability, rainfall is forecasted only for today. The precipitation will be minimal at 0.04".
Substantial differences in temperature are forecasted in the coming days. The temperature is expected to swing from 62.6°F up to 77°F, while the forecast minimum temperature falls between 42.8°F and 50°F.
With a maximum temperature of 77°F, Tuesday through Thursday and next Monday will be the warmest days in Sumter; today is the coldest day, with a maximum temperature of 62.6°F.
Updated: Oct 17, 2026 @ 13:53:27 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, short-lived rain showers are possible in the morning.

Today, there is a low chance of minimal precipitation in Sumter.

Today, the highest temperature will be 62.6°F, while the lowest temperature will be 42.8°F.
The maximum temperature will be uncommonly lower than the average highest temperature of 73.8°F in October. The lowest temperature will be also significantly lower than the average low of 56.7°F.

On Saturday, in Sumter, sunrise was at 7:28 am and sunset will be at 6:45 pm (EDT).

Today, the daylight will last for 11h and 17min.

Tomorrow, the forecast calls for abundant sunshine.

No, it will not rain tomorrow.

Tomorrow, the highest temperature will be 66.2°F, while the lowest temperature will be 44.6°F.
Tomorrow, the maximum temperature will be relatively lower than the average highest temperature in October. The lowest temperature tomorrow will be significantly lower than the average low of 56.7°F.

On Sunday, in Sumter, sunrise will be at 7:28 am and sunset at 6:43 pm (EDT).

Tomorrow, the daylight will last for 11h and 15min.