Climate and monthly weather forecastSummerville, SC
Climate and monthly weather forecast
The climate of Summerville
Nested in the heartland of South Carolina, USA, the town of Summerville sits snugly within the humid subtropical zone (Cfa), characterized by the Köppen climate classification. This climate zone inherently suggests that Summerville experiences minimal temperature variations, moderate rainfall, and high humidity throughout the year. Triumphing over all seasons, temperate conditions dominate the town’s climate, with no distinct dry period.Notably, the highest average monthly temperature recedes in July, exhibiting temperatures from 88.7°F (31.5°C) to 91.2°F (32.9°C). Conversely, a shift towards the lowest temperature is perceptible in January, with temperatures typically ranging from 40.1°F (4.5°C) to 56.8°F (13.8°C). Summerville’s humidity outlook remains consistent, reaching quarterly highs between July and September at 76%, whilst the remaining months hover around 72% to 75%. Precipitation in Summerville is evident year-round, peeking at 2.09" (53mm) in August, with the volume marginally reducing to its lowest at 0.28" (7mm) in January.
Where sunlight is concerned, the longest sunny days strike in June with sunlight duration touching 14.3 hours, while the shortest span of daylight lurks in December, capping at 5.5 hours. Given the region's high humidity levels, it's not surprising to find an average cloud cover of 38% in March, which escalates to a peak of 42% in February and December.
The best time to visit Summerville
The optimal time to set foot in Summerville is during the journey from April to June. Conditions during these months provide a balanced blend of temperature and rainfall. Visitors can expect temperatures prevailing from 75.4°F (24.1°C) to 88.7°F (31.5°C), making it comfortable enough for outdoor activities and exploration. Moreover, rainfall shrinks during this period, predominantly in May, reducing to 0.67" (17mm).The worst time to visit Summerville
Contrarily, the least desirable time to explore Summerville extends from July to September. This period is marked by the year's highest average temperatures, mounting from 90.1°F (32.3°C) to 91.2°F (32.9°C), alongside soaring humidity levels of 75% to 76%. Coupled with the most voluminous rainfall at 2.09" (53mm) registered in August, prospective tourists might find such conditions stifling and unfavorable for outdoor endeavors.Spring weather in Summerville
Temperatures during the spring months of March to May in Summerville are gradually warming, ranging from 66.7°to 82°F (27.8°C). Rainfall shows a modest increase from 0.59" (15mm) in March to 0.83" (21mm) in April, followed by a slight drop to 0.67" (17mm) in May. This period witnesses remarkable daylight hours fluctuating from 12 to 13.9 hours, combining pleasant temperatures and extended daylight adequately for outdoor recreations.Summer weather in Summerville
A profound shift towards relatively high temperatures marks Summerville's summer from June to August. With temperatures soaring between 88.7°F (31.5°C) and 91.2°F (32.9°C), the sun dominates the sky for up to 14.3 hours at the peak of the season. However, this period is not devoid of rain, reaching an annual high of 2.09" (53mm) in August. Summer days can be humid, with relative humidity oscillating between 75% and 76%.Autumn weather in Summerville
Autumn in Summerville extends from September through November. Temperatures delicately drop from a high 85.5°F (29.7°C) in September to a moderate 66°F (18.9°C) by November. Rainfall dwindles, with totals ranging from 1.1" (28mm) in September to 0.55" (14mm) in November. The daylight hours also shrink, falling from 12.4 hours in September to 10.5 hours in November.Winter weather in Summerville
Encircling the months from December to February, winter in Summerville sees its lowest temperature averages, fluctuating between 40.1°F (4.5°C) and 61.2°F (16.2°C). Precipitation in winter shows slight variability, tallying up to 1.38" (35mm) in December and gradually diminishing to 0.51" (13mm) by February. Notably, winters here pose low sunlight hours, narrowing down from 10 to 10.3 hours, alongside an uptick in cloud cover of 42% in December and February. Peel back the layers of Summerville’s climate tapestry, and the subtropical flavors offer a, sometimes, wet but usually warm welcome to visitors and residents alike.Weather in January
A fresh start to the year is marked by mild weather in Summerville, South Carolina. Winter is in full swing; however, the city is primarily driven by the temperate climate. It can be cooler than the rest of the year, with an average high temperature of 56.8°F (13.8°C) and a low of 40.1°F (4.5°C). Weather in January »Weather in February
February in Summerville experiences a slight rise in temperatures, offering a gentle transition to spring season. The high temperature averages around 61.2°F (16.2°C), showing an uptick from the preceding month. Rainfall increases to 0.51" (13mm) during this month, which nurtures the environment for the impending spring bloom. Weather in February »Weather in March
March signifies the arrival of Spring in Summerville, and with it, a noticeable increase in temperatures. A significant warmer feeling emerges as the average high temperature reaches 66.7°F (19.3°C). The daylight extends, amplifying the warming effect and making the days seem longer. Weather in March »Weather in April
April witnesses a significant transformation in Summerville's weather pattern. The average high temperature jumps to 75.4°F (24.1°C), making the weather comfortably warm. April also displays a surge in rainfall with 0.83" (21mm) on average, marginally more than the preceding month. Weather in April »Weather in May
The pleasant warmth of May marks the transition from spring to summer in Summerville. With an average high temperature now at 82°F (27.8°C), days can get quite warm, but evenings remain comfortable. The city experiences clear to partly cloudy skies accompanied by longer daylight hours. Weather in May »Weather in June
June signifies the arrival of summer in Summerville with temperatures peaking to an average high of 88.7°F (31.5°C). The city undergoes slight modifications in weather patterns with a rather noticeable increase in rainfall to 1.22" (31mm). Weather in June »Weather in July
July is typically the warmest month in Summerville with temperatures often reaching the peak average of 91.2°F (32.9°C) during the day. July carries the heaviest rainfall of the year with an average precipitation of 2.09" (53mm). Weather in July »Weather in August
August maintains the high warmth levels characteristic of summer with temperatures averaging a high of 90.1°F (32.3°C), slightly lower than July. Rainfall begins to recede slightly from July’s peak, averaging at 1.1" (28mm) for the month. Weather in August »Weather in September
September marks the end of summer and onset of fall in Summerville. Temperatures start to cool, with the average high reducing to 85.5°F (29.7°C) from August. This month experiences a tapering off in rainfall to a slightly less average of 0.83" (21mm). Weather in September »Weather in October
October welcomes autumn in Summerville with a noticeable drop in temperatures - the maximum average is now 76.6°F (24.8°C). Decreased rainfall, averaging 0.55" (14mm), and lower relative humidity levels characterize this month. Weather in October »Weather in November
November in Summerville sees another drop in temperatures, with the average high standing at 66°F (18.9°C). The town gets quieter as the leaves continue to change color and fall, preparing the city for the upcoming winter. Despite the cooler temperatures, it is a drier month with rainfall averaging 0.51" (13mm), lower than the prior month. Weather in November »Weather in December
December welcomes the winter season in Summerville, characterized by an average high temperature of 60.4°F (15.8°C) and shorter daylight hours. Rainfall increases to an average of 1.38" (35mm) this month. Although higher than November, it's still minimal, ensuring the enjoyable chill of the winter without heavy downpours. Weather in December »Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Summerville, January is the month with the lowest recorded average temperatures, measuring a high of 56.8°F (13.8°C) and a low of 40.1°F (4.5°C).
The months with the lowest humidity are January and March, with an average relative humidity of 72%.
January is the month with the least rainfall. Rain falls for 5.7 days and accumulates 0.28" (7mm) of precipitation.
Throughout the year, in Summerville, there are 120.6 rainfall days, and 11.18" (284mm) of precipitation is accumulated.
Months with snowfall in Summerville are January and February.
The months with the most snowfall in Summerville are January and February, with an average 0.04" (1mm) of accumulated snow.
Throughout the year, in Summerville, South Carolina, there are 0.5 snowfall days, and 0.08" (2mm) of snow is accumulated.
January and December, with an average maximum UV index of 3, are months with the lowest UV index in Summerville, South Carolina.
March through December are months without snowfall in Summerville, South Carolina.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The months with the highest UV index in Summerville, South Carolina, are May through August, with an average maximum UV index of 7.
June has the longest days of the year, with an average of 14h and 18min of daylight.
The month of July, characterized by an average high of 91.2°F (32.9°C) and a low of 74.7°F (23.7°C), is recognized as the warmest in Summerville, South Carolina.
With an average of 10.9h of sunshine, July has the most sunshine of the year.
August is the month with the most rainfall in Summerville. Rain falls for 18.3 days and accumulates 2.09" (53mm) of precipitation.
With an average relative humidity of 78%, December is the most humid month in Summerville.
December has the shortest days of the year, with an average of 10h and 0min of daylight.
December has the least sunshine of the year, with an average of 5.5h of sunshine.
Average temperature
Summerville, SC
The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is January (56.8°F).
The month with the highest average low temperature is July (74.7°F).
The coldest month (with the lowest average low temperature) is January (40.1°F).
Average pressure
Summerville, SC
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
29.97"Hg
- Average pressure in July:
30"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed
Summerville, SC
- Average wind speed in January:
6.1mph - Average wind speed in February:
6.5mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.8mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5.5mph - Average wind speed in October:
5.8mph - Average wind speed in November:
5.8mph - Average wind speed in December:
5.8mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Summerville, SC
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (72%).
Average rainfall
Summerville, SC
- Average rainfall in January:
0.28" - Average rainfall in February:
0.51" - Average rainfall in March:
0.59" - Average rainfall in April:
0.83" - Average rainfall in May:
0.67" - Average rainfall in June:
1.22"
- Average rainfall in July:
1.14" - Average rainfall in August:
2.09" - Average rainfall in September:
1.1" - Average rainfall in October:
0.83" - Average rainfall in November:
0.55" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is August (2.09").
The driest month (with the least rainfall) is January (0.28").
Average rainfall days
Summerville, SC
- Average rainfall days in January:
5.7 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
9.7 days - Average rainfall days in May:
10 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
18.3 days - Average rainfall days in September:
11.2 days - Average rainfall days in October:
6.3 days - Average rainfall days in November:
6.2 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is August (18.3 days).
The month with the least rainy days is January (5.7 days).
Average snowfall
Summerville, SC
The months with the highest snowfall are January and February (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
Summerville, SC
- Average snowfall days in January:
0.3 days - Average snowfall days in February:
0.1 days - Average snowfall days in March:
0.1 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Summerville, SC
- Average daylight in January:
10h and 18min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 18min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 18min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 30min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
5h and 36min - Average sunshine in February:
6h and 30min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 30min - Average sunshine in May:
10h and 0min - Average sunshine in June:
10h and 36min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 24min - Average sunshine in September:
8h and 42min - Average sunshine in October:
6h and 36min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days
Summerville, SC
- Average sunshine days in January:
23.6 days - Average sunshine days in February:
20.1 days - Average sunshine days in March:
21.6 days - Average sunshine days in April:
19 days - Average sunshine days in May:
17.4 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
7.4 days - Average sunshine days in September:
14.6 days - Average sunshine days in October:
22.5 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
22.8 days
The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is August (7.4 days).
Average UV index
Summerville, SC
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover
Summerville, SC
The months with the most cloud cover are February and December (Cloud cover 42).
The months with the least cloud cover are July and October (Cloud cover 29).
Average visibility
Summerville, SC
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
