The climate of Sumter
Sumter,
South Carolina, USA lies under Köppen's climate classification of Cfa. This classification implies that Sumter has a humid subtropical climate lacking a dry season. The year-round conditions depict considerable variations in the weather parameters.
The average high and low temperature in Sumter changes noticeably as the year progresses. Starting with highs of 52.9°F (11.6°C) and lows of 38.1°F (3.4°C) in
January, it escalates reaching peaks in
July with highs of 90.7°F (32.6°C) and lows of 72.9°F (22.7°C). The temperatures fall again to descend to yearly lows in
December, with highs at 56.3°F (13.5°C) and lows at 42.3°F (5.7°C).
Humidity in Sumter maintains a pretty even field from 70 to 76% throughout the year. Rainfall varies throughout the year, with January recording the least precipitation of 1.89" (48mm) and
August showing the highest with 3.5" (89mm). Snowfall is minimal with meager 0.24" (6mm) in January, slowly decreasing to no snowfall from
April to
November, and a slight increase in December to 0.16" (4mm).
Sunshine hours, daylight hours, and UV index follow a pendular pattern. They start low in January, rise towards mid-year, and then decrease again to end the year on a lower note. Notably, maximum daylight takes place in
June with 14.4 hours, subsequently dropping to 9.9 hours by year-end.
The best time to visit Sumter
For those seeking pleasant temperatures and ample sunshine, the best time to visit
Sumter is from
April to
June. The high temperatures remain in a comfortable range from 73.4°F (23°C) to 87.4°F (30.8°C). The rainfall remains on the lower side, relative to other months, varying between 2.13" (54mm) to 3.19" (81mm). The daylight hours in this period oscillate from 13.1 hours to 14.4 hours, providing sufficient time to explore the city and engage in outdoor activities.
The worst time to visit Sumter
While unfavorable periods for visiting may vary depending on individual preference, generally,
July to
August is considered less than ideal. This period experiences the highest temperatures with highs running between 88.9°F (31.6°C) to 90.7°F (32.6°C). Moreover, these months also have the highest rainfall for the year, with precipitation between 3.23" (82mm) to 3.5" (89mm), making outdoor activities potentially less enjoyable.
Spring weather in Sumter
The spring season displays a gradual rise in temperatures in
Sumter. The average temperatures in this season run from highs of 63.9°F (17.7°C) to 80.2°F (26.8°C), and lows from 46.6°F (8.1°C) to 62.8°F (17.1°C). Humidity remains relatively stable ranging between 72 to 76%. Rainfall measures from 2.13" (54mm) to 3.35" (85mm) while daylight hours increase noticeably from 12 hours in
March to 13.9 hours by
May end.
Summer weather in Sumter
Capturing typical subtropical climate, the summer season in
Sumter showcases temperature highs from 87.4°F (30.8°C) to 90.7°F (32.6°C). The minimum temperatures hover between 70°F (21.1°C) to 72.9°F (22.7°C). Rainfall peaks during this season, with measurements extending from 3.11" (79mm) to 3.5" (89mm). With more than 14 daylight hours at the onset of summer, the duration shortens slightly as the season progresses.
Autumn weather in Sumter
During autumn, temperature highs range from 83.7°F (28.7°C) to 73.8°F (23.2°C), gradually decreasing from
September to
November. The temperature lows exhibit similar descent varying between 66.6°F (19.2°C) to 56.7°F (13.7°C). Rainfall decreases considerably during these months, ranging from 2.48" (63mm) to 1.97" (50mm). Daylight hours reduce over the course of autumn, winding down from 12.4 hours to 10.4 hours.
Winter weather in Sumter
Winter brings colder temperatures to
Sumter, with highs varying between 62.4°F (16.9°C) to 56.3°F (13.5°C) and lows oscillating between 46.4°F (8°C) to 42.3°F (5.7°C). Rainfall is quite variable during this season, peeking at 3.58" (91mm) in
December and dipping to 1.89" (48mm) by
February. Despite the cold, sunlight is relatively decent with daylight hours fluctuating from 10.4 hours to 9.9 hours.
Weather in January
The new year in
Sumter,
South Carolina, USA, kicks off with a cool and moderately humid climate.
January carries the chill of winter with an average high temperature of 52.9°F (11.6°C) and a low of 38.1°F (3.4°C). The city receives a snowfall of 0.24" (6mm) during the first month, providing a hint of a Carolina winter.
Weather in January »Weather in February
Sumter transitions from
January into
February, anticipating an escalation in temperatures and precipitation. The month showcases a balance between winter and spring, characterized by an average high temperature of 57.7°F (14.3°C) and a low of 41°F (5°C).
Weather in February » Weather in March
While
February was a blend of snowflakes and rainfall,
March in
Sumter conveys a clear shift towards a warmer season. Plentiful sunshine and higher temperatures become predominant, marking an unequivocal arrival of spring. The highlights of this change are an average high temperature of 63.9°F (17.7°C) and a low of 46.6°F (8.1°C) accompanied by a scant snowfall of 0.04" (1mm).
Weather in March »
Weather in April
April is a delightful blend of distinct spring characteristics paired with emergent summer vibes. Ample daylight hours and clear skies set a bright backdrop for the blooming city of
Sumter. The month's identifying features are an average high temperature of 73.4°F (23°C) and a low of 55°F (12.8°C).
Weather in April » Weather in May
May greets
Sumter with warmer temperatures signaling the onset of summer. The high of 80.2°F (26.8°C) and low of 62.8°F (17.1°C) hint at the rising temperatures that
June will bring. With increasing humidity and ample rainfall of 3.35" (85mm), an air of fertility envelops the city.
Weather in May » Weather in June
As the first official month of summer,
June.Sun shines the longest with 14.4 hours of daylight and 10.5 hours of sunshine per day.
Sumter’s climate reflects summer with a high temperature of 87.4°F (30.8°C) and a low of 70°F (21.1°C).
Weather in June »
Weather in July
July is truly the height of summer in
Sumter, characterized by long days, heat, and humidity. Although the month’s average high temperature is a scorching 90.7°F (32.6°C), the low of 72.9°F (22.7°C) provides a hint of nighttime relief.
Weather in July » Weather in August
August in
Sumter remains hot, while the weather shows subtle indications of the impending seasonal change. The month is characterized by a high temperature of 88.9°F (31.6°C) and low of 71.4°F (21.9°C). Staying true to the trend of a Southern summer, August presents the maximum rainfall of 3.5" (89mm).
Weather in August » Weather in September
September ushers in fall, bringing with it pleasant temperatures, reduced rainfall, and humidity. The gradual transition into the autumn season is seen through a high temperature of 83.7°F (28.7°C) and a low of 66.6°F (19.2°C).
Weather in September »
Weather in October
October, associated with a distinct autumn charm, grants
Sumter a break from summer's relentless heat. The gradual lowering of the average high temperature to 73.8°F (23.2°C) and a low of 56.7°F (13.7°C) signify the onset of cooler days and nights.
Weather in October » Weather in November
The last month of the autumn,
November, is also an enjoyable month in
Sumter,
South Carolina, with an average temperature varying between 46.4°F (8°C) and 62.4°F (16.9°C). As November arrives, Sumter's weather displays a decrease in high-temperatures, transitioning from
October's moderately hot 73.8°F (23.2°C) to an enjoyable 62.4°F (16.9°C).
Weather in November »Weather in December
December brings the winter chill to
Sumter with the year's lowest average temperatures. A high temperature of 56.3°F (13.5°C) and low of 42.3°F (5.7°C) mark this seasonal change. The month also sees a slight increase in snowfall, with 0.16" (4mm) recorded covering the city in a thin blanket of snow.
Weather in December »