Live Weather & Forecast
Weather in Sumter
South Carolina, United States · Real-time conditions & 3-day outlook
17°C
Feels like 17°C
63°F / Feels 63°F
Sunny
Sumter, South Carolina
🌞 Daytime
Updated: 2026-04-13 09:00
Humidity
94%
Wind
12.6 km/h WSW
Wind Gust
16.3 km/h
Pressure
1028 mb
Visibility
16 km
UV Index
1.3
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
15.5°C
Wind Degree
238°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
149.9 μg/m³
NO₂
1.7 μg/m³
O₃
125 μg/m³
SO₂
2.8 μg/m³
PM 2.5
6.4 μg/m³
PM 10
8.3 μg/m³
Today's Hourly Forecast
24-hour breakdown for Sumter, South Carolina
12 AM
19°
Clear
1 AM
18°
Clear
2 AM
17°
Clear
3 AM
16°
Clear
4 AM
15°
Clear
5 AM
15°
Clear
6 AM
15°
Clear
7 AM
15°
Sunny
8 AM
18°
Sunny
9 AM
17°
Sunny
10 AM
23°
Sunny
11 AM
26°
Sunny
12 PM
28°
Sunny
1 PM
29°
Sunny
2 PM
30°
Sunny
3 PM
30°
Sunny
4 PM
30°
Sunny
5 PM
30°
Sunny
6 PM
26°
Sunny
7 PM
24°
Overcast
8 PM
22°
Overcast
9 PM
21°
Cloudy
10 PM
20°
Partly Cloudy
11 PM
18°
Cloudy
3-Day Forecast
Daily overview for Sumter, South Carolina
Today
Sunny
31°
/
14°
🌧️ 0% chance of rain
💧 Avg. humidity: 65%
💨 Max wind: 16.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2.1
🌅 Sunrise: 06:53 AM
🌇 Sunset: 07:52 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
28°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 16.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2.3
🌅 Sunrise: 06:52 AM
🌇 Sunset: 07:53 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
31°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 65%
💨 Max wind: 17.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2.5
🌅 Sunrise: 06:51 AM
🌇 Sunset: 07:54 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Sumter
Plan your trip to Sumter, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Sumter?
Current conditions in Sumter: Sunny, temperature 17°C, humidity 94%.
What is the best time to visit Sumter?
The best time to visit Sumter is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Sumter?
Sumter is located at approximately 33.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Sumter?
The wettest period in Sumter is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Sumter?
For visits to Sumter during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Sumter in?
Sumter is located in United States, in the state of South Carolina.
What are the public holidays in Sumter in 2026?
View the 2026 public holidays for Sumter on our Holidays page.
What are the GPS coordinates used for the weather forecast in Sumter?
The weather forecast for Sumter uses coordinates 33.9204, -80.3415.