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Sumter (SC) Climate by Month

The temperature in Sumter can vary quite a bit throughout the year. Temperatures can be very warm during the warmest months, and mild during the cooler months. It also has a notably wet climate with much precipitation. Let's now guide you through the climate details for a complete overview.

Average day and night temperature

Visitors to Sumter can expect significant temperature changes throughout the year. Average daytime temperatures range from a very warm 33°C in July, the warmest time of the year, to a moderate 13°C during cooler months like January. At night, temperatures typically average around 0°C during these months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Sumter is known for its substantial rain/snowfall, with annual precipitation reaching 1223 mm. While rainfall varies throughout the year, each season offers its own charm. July brings wetter days averaging 140 mm of precipitation, spread over 12 rainy days. In contrast, January experiences a drier climate, with about 68 mm of rainfall spread across 11 rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

The best time of year to visit Sumter in the United States of America

During the months of April and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which is the warmest month in Sumter?
    July has an average maximum temperature of 33°C and is the warmest month of the year.
  • Which is the coldest month in Sumter?
    The coldest month is January with an average maximum temperature of 13°C.
  • Which is the wettest month in Sumter?
    July tops the wettest month list with 140 mm of rainfall.
  • Which is the driest month in Sumter?
    January is the driest month with 68 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Sumter (SC)

    Fri   Nov 22
    13°C | 0°C
    NW 18 km/h
    almost clear and no rain

    almost clear and no rain

    Sat   Nov 23
    16°C | 2°C
    W 7 km/h
    clear and no rain

    clear and no rain

    Sun   Nov 24
    19°C | 2°C
    SW 7 km/h
    clear and no rain

    clear and no rain