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      Elev 170 ft, 33.921 °N 80.340 °W

      Sumter, SC

      ETV Sumter WeatherSTEM Station82°
      Updated: 10:28 AM EDT on September 22, 2026 (GMT -4)
      4 minutes ago
      88°
      71°
      82
      Feels Like 89
      Partly Cloudy
      N
      7
      Lower temperature is expected today
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Today
        Tue 09/22
        High 88°f
         35% Precip. / 0.07 in
        Mixed clouds and sun this morning. Scattered thunderstorms developing this afternoon. High 88F. Winds ENE at 5 to 10 mph. Chance of rain 40%.
        Tonight
        Tue 09/22
        Low 69°f
         58% Precip. / 0.09 in
        Scattered thunderstorms early, then cloudy skies after midnight. Low 69F. Winds NE at 5 to 10 mph. Chance of rain 60%. Locally heavy rainfall possible.
        Tomorrow
        Wed 09/23
        High 79°f62°f
         24% Precip. / 0 in
        Cloudy skies. Slight chance of a rain shower. High 79F. Winds NE at 10 to 15 mph.
        Hourly Forecast
        Now
        82°
        11AM
        84°
        12PM
        86°
        1PM
        88°
        2PM
        88°
        3PM
        88°
        4PM
        87°
        5PM
        37%
        85°
        6PM
        35%
        83°
        7PM
        34%
        80°
        7:18PM
        Sunset
        8PM
        58%
        76°
        9PM
        46%
        74°
        10PM
        35%
        73°
        11PM
        72°
        12AM
        72°
        1AM
        72°
        2AM
        72°
        3AM
        71°
        4AM
        70°
        5AM
        70°
        6AM
        70°
        7AM
        70°
        7:10AM
        Sunrise
        8AM
        70°
        9AM
        71°
        10AM
        73°
        Precipitation
        58%
        Thunderstorms possible after 5 PM
        Pollen
        None
        Air Quality
        34
        Good
        UV Index
        4
        Moderate
        Additional Conditions
        1. Pressure 30.01 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point74°F
        5. Humidity 76%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSMS Station History
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 88°F 82°F 96°F 1940
        4. Low 71°F 61°F 45°F 1938
        5. Rain/Snow Depth
        6. Precipitation 0.16 in 3.1 in -
        7. Snow 0 in 0 in -
        Almanac for September 23, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 79°F 82°F 97°F
        4. Low 71°F 61°F 44°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:09 AM 7:17 PM
        3. Civil Twilight 6:44 AM 7:42 PM
        4. Nautical Twilight 6:15 AM 8:11PM
        5. Astronomical Twilight 5:46 AM 8:41 PM
        1. Length of Visible Light 12h 58m
        2. Length of Day 12h 8m
        3. Tomorrow will be 2 minutes 6 seconds shorter
        1. Moon 5:13 PM 2:57 AM
        2. Waxing Gibbous85% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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