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Sumter, SC weather and climate

Sumter County, SC · population 43,065 · about 180 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Sumter's own coordinates.

The year at a glance

Sunny days
213
clear or partly cloudy, per year
Precipitation
44 in
per year
Wet days
122
rain or snow per year
Snowfall
1 in
per year
Hot days
58
above 90 °F
Freezing nights
54
at or below 32 °F
Humidity
70%
average relative
Average temperature
62 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 55 °FDaily high, Feb: 59 °FDaily high, Mar: 67 °FDaily high, Apr: 75 °FDaily high, May: 82 °FDaily high, Jun: 87 °FDaily high, Jul: 90 °FDaily high, Aug: 89 °FDaily high, Sep: 84 °FDaily high, Oct: 75 °FDaily high, Nov: 65 °FDaily high, Dec: 58 °FDaily low, Jan: 33 °FDaily low, Feb: 35 °FDaily low, Mar: 41 °FDaily low, Apr: 50 °FDaily low, May: 58 °FDaily low, Jun: 66 °FDaily low, Jul: 70 °FDaily low, Aug: 69 °FDaily low, Sep: 63 °FDaily low, Oct: 51 °FDaily low, Nov: 40 °FDaily low, Dec: 35 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high555967758287908984756558
Daily low333541505866706963514035

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovSumter, Jan: 3.4 inSumter, Feb: 3.3 inSumter, Mar: 3.4 inSumter, Apr: 3.4 inSumter, May: 3.0 inSumter, Jun: 4.2 inSumter, Jul: 4.6 inSumter, Aug: 4.6 inSumter, Sep: 4.0 inSumter, Oct: 3.4 inSumter, Nov: 2.8 inSumter, Dec: 3.7 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Sumter3.43.33.43.43.04.24.64.64.03.42.83.7

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovSumter, Jan: 17 daysSumter, Feb: 15 daysSumter, Mar: 18 daysSumter, Apr: 19 daysSumter, May: 19 daysSumter, Jun: 17 daysSumter, Jul: 18 daysSumter, Aug: 18 daysSumter, Sep: 18 daysSumter, Oct: 20 daysSumter, Nov: 19 daysSumter, Dec: 17 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Sumter171518191917181818201917

Compare Sumter with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered South Carolina city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).