See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
27°
Clear
Feels Like: 24°
Min: 18°
Max: 32°
The next few hours will be clear, with tomorrow reaching 33°C and dropping to 21°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:10
Sunrise
19:20
Sunset
Moon
Waxing Crescent
12:39
Moonrise
21:47
Moonset
Daily Forecast
Wednesday
Today
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for Sumter.
Resources
UV Index
Humidity
Weather in Sumter tomorrow, September 17, 2026
Conditions in Sumter on September 17, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting. Expect a brighter morning, with limited cloud around 3% by 08:00. Conditions start on a settled note.
Expect highs of 33°C and cooler readings close to 18°C. The air stays humid, with relative humidity between 34% and 95% and the peak around 07:00. Expect gentle winds, highest near 01:00 at 1.8 km/h.
Afternoon conditions open up, holding cloud close to 11% near 19:00. The day finishes on a milder, brighter note. Expect visibility near 15.8 km, with poorer spells close to 13.8 km. Expect sunrise at 07:11, sunset at 19:18, and 12 hours 7 minutes of sunlight today overall.
Taken together, settled sunshine in Sumter on September 17, 2026 makes outdoor timing easier, with highs near 33°C.
Frequently asked questions about weather in Sumter
How warm does it get in Sumter?
The warmest month in Sumter is July, with average high temperatures of 33°C. The average temperature during this period is around 28°C.
How cold does it get in Sumter?
The coldest month in Sumter is January, with average low temperatures of 4°C. The average temperature during this period is around 8°C.
What is the wettest time of year in Sumter?
The wettest month in Sumter is August, with an average of 135mm of precipitation.
What is the driest time of year in Sumter?
The driest month in Sumter is November, with an average of 60mm of precipitation.
Explore more weather forecasts
- Dentsville, South Carolina
- New York City, New York
- Forest Acres, South Carolina
- Los Angeles, California
- Florence, South Carolina
- Brooklyn, New York
- Columbia, South Carolina
- Chicago, Illinois
- Orangeburg, South Carolina
- Houston, Texas
- Cayce, South Carolina
- Queens, New York
- West Columbia, South Carolina
- Phoenix, Arizona
- Saint Andrews, South Carolina
- Philadelphia, Pennsylvania
