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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is another refreshing winter month in Sullivan's Island, South Carolina, with an average temperature ranging between max 57°F (13.9°C) and min 45.5°F (7.5°C). January, recording an average high temperature of 57°F (13.9°C) and a low temperature of 45.5°F (7.5°C), is Sullivan's Island's coldest month. Weather in January »
Weather in February
The last month of the winter, February, is another refreshing month in Sullivan's Island, South Carolina, with an average temperature ranging between min 48.7°F (9.3°C) and max 59.9°F (15.5°C). The arrival of February brings an average high-temperature of a still moderate 59.9°F (15.5°C), nearly identical to January's 57°F (13.9°C). Weather in February »
Weather in March
The first month of the spring, March, is an enjoyable month in Sullivan's Island, South Carolina, with an average temperature ranging between max 64.4°F (18°C) and min 53.6°F (12°C). The arrival of March marks a slight shift to an average high-temperature of an enjoyable 64.4°F (18°C) from February's 59.9°F (15.5°C). Weather in March »
Weather in April
April in Sullivan's Island, South Carolina, is an agreeable spring month, with an average temperature ranging between max 71.8°F (22.1°C) and min 61.3°F (16.3°C). The onset of April marks a slight increase in the average high-temperature, moving from an enjoyable 64.4°F (18°C) in March to a pleasant 71.8°F (22.1°C). Weather in April »
Weather in May
May, the last month of the spring in Sullivan's Island, is a warm month, with an average temperature ranging between max 78.1°F (25.6°C) and min 68.7°F (20.4°C). The average high-temperature mildly increases in May, edging from a pleasant 71.8°F (22.1°C) in April to a moderately hot 78.1°F (25.6°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Sullivan's Island, South Carolina, with an average temperature ranging between min 75.4°F (24.1°C) and max 84.6°F (29.2°C). The arrival of June witnesses a small shift in the average high-temperature, moving from a moderately hot 78.1°F (25.6°C) in May to a still warm 84.6°F (29.2°C). Weather in June »
Weather in July
July in Sullivan's Island, South Carolina, is a tropical summer month, with an average temperature varying between 78.3°F (25.7°C) and 86.5°F (30.3°C). Temperature readings reach their annual highs in July, averaging 86.5°F (30.3°C) and a minimum average of 78.3°F (25.7°C). July's heat index is appraised at a sweltering 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Sullivan's Island, South Carolina, with an average temperature ranging between min 78.1°F (25.6°C) and max 85.8°F (29.9°C). August's weather displays an average high-temperature of a warm 85.8°F (29.9°C), slightly varied from July's 86.5°F (30.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Sullivan's Island, is also a moderately hot month, with an average temperature ranging between max 82.9°F (28.3°C) and min 74.3°F (23.5°C). The beginning of September records an average high-temperature of a still warm 82.9°F (28.3°C), almost echoing the conditions of the previous month. Weather in September »
Weather in October
October, the same as September, is a moderately hot autumn month in Sullivan's Island, South Carolina, with temperature in the range of an average high of 75.2°F (24°C) and an average low of 64.9°F (18.3°C). The transition into October involves a small decrease in the average high-temperature, dipping slightly from a moderately hot 82.9°F (28.3°C) in September to a still warm 75.2°F (24°C). Weather in October »
Weather in November
The last month of the autumn, November, is another refreshing month in Sullivan's Island, South Carolina, with an average temperature ranging between min 54.9°F (12.7°C) and max 65.7°F (18.7°C). November indicates a shift in the average high-temperature, from October's moderately hot 75.2°F (24°C) to a comfortable 65.7°F (18.7°C). Weather in November »
Weather in December
December, the first month of the winter in Sullivan's Island, is still a comfortable month, with an average temperature varying between 50.4°F (10.2°C) and 61°F (16.1°C). Sullivan's Island, South Carolina, signifies an average high-temperature of a still enjoyable 61°F (16.1°C) in December, closely mirroring the 65.7°F (18.7°C) of November. Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Sullivan's Island?
Sullivan's Island's coldest temperatures are experienced in January, with average high temperatures of 57°F (13.9°C) and lows of 45.5°F (7.5°C).
What is the least humid month in Sullivan's Island?
January and March, with an average relative humidity of 73%, are the least humid months.
What is the driest month in Sullivan's Island?
January is the month with the least rainfall in Sullivan's Island. Rain falls for 9.7 days and accumulates 1.42" (36mm) of precipitation.
How much does it rain in Sullivan's Island?
In Sullivan's Island, South Carolina, during the entire year, the rain falls for 182 days and collects up to 45.55" (1157mm) of precipitation.
When does it snow in Sullivan's Island?
January and February are months with snowfall.
When does it snow the most in Sullivan's Island?
January has the most snowfall days of the year. Snow falls for 0.3 days.
How many days does it snow in Sullivan's Island?
In Sullivan's Island, during the entire year, snow falls for 0.4 days.
What is the month with the lowest UV index in Sullivan's Island?
With an average maximum UV index of 3, January is the month with the lowest UV index.
When it does not snow in Sullivan's Island?
March through December are months without snowfall.
When is Daylight Saving Time (DST) in Sullivan's Island?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Sullivan's Island, 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.
What is the month with the highest UV index in Sullivan's Island?
The months with the highest UV index are May through August, with an average maximum UV index of 7.
When are the longest days in Sullivan's Island?
With an average of 14h and 18min of daylight, June has the longest days of the year in Sullivan's Island.
What are the warmest months in Sullivan's Island?
Sullivan's Island's warmest temperatures are experienced in July, with average high temperatures of 86.5°F (30.3°C) and lows of 78.3°F (25.7°C).
What month has the most sunshine in Sullivan's Island?
The month with the most sunshine is July, with an average of 11h of sunshine.
What is the rainiest month in Sullivan's Island?
The month with the most rainfall in Sullivan's Island, South Carolina, is August, when the rain falls for 25.9 days and typically aggregates up to 8.23" (209mm) of precipitation.
What is the most humid month in Sullivan's Island?
With an average relative humidity of 78%, December is the most humid month in Sullivan's Island, South Carolina.
What is the month with the shortest days in Sullivan's Island?
December has the shortest days of the year in Sullivan's Island, South Carolina, with an average of 10h and 0min of daylight.
What is the month with the least sunshine in Sullivan's Island?
December has the least sunshine of the year, with an average of 5.7h of sunshine.
Average temperature
Sullivan's Island, SC
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (57°F).
The month with the highest average low temperature is July (78.3°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).
Average pressure
Sullivan's Island, 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:
29.98"Hg
- Average pressure in July:
30"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed
Sullivan's Island, SC
- Average wind speed in January:
10mph - Average wind speed in February:
10.2mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.3mph - Average wind speed in May:
9.4mph - Average wind speed in June:
8.9mph
- Average wind speed in July:
9.1mph - Average wind speed in August:
8.4mph - Average wind speed in September:
9.2mph - Average wind speed in October:
9.5mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).
Average humidity
Sullivan's Island, SC
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).
Average rainfall
Sullivan's Island, SC
- Average rainfall in January:
1.42" - Average rainfall in February:
2.01" - Average rainfall in March:
1.97" - Average rainfall in April:
3.07" - Average rainfall in May:
3.23" - Average rainfall in June:
4.72"
- Average rainfall in July:
5.67" - Average rainfall in August:
8.23" - Average rainfall in September:
5.71" - Average rainfall in October:
3.23" - Average rainfall in November:
2.01" - Average rainfall in December:
4.29"
The wettest month (with the highest rainfall) is August (8.23").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days
Sullivan's Island, SC
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
10.7 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
13.1 days - Average rainfall days in May:
15.8 days - Average rainfall days in June:
21 days
- Average rainfall days in July:
24.4 days - Average rainfall days in August:
25.9 days - Average rainfall days in September:
19.2 days - Average rainfall days in October:
11.7 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
10.5 days
The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (8.5 days).
Average snowfall days
Sullivan's Island, SC
- Average snowfall days in January:
0.3 days - Average snowfall days in February:
0.1 days - Average snowfall days in March:
0 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 March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Sullivan's Island, SC
- Average daylight in January:
10h and 2min - 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 5min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 3min - 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 5min - Average sunshine in February:
6h and 5min - Average sunshine in March:
7h and 5min - Average sunshine in April:
9h and 5min - Average sunshine in May:
10h and 3min - Average sunshine in June:
10h and 5min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
10h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 4min - Average sunshine in November:
6h and 1min - Average sunshine in December:
5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Sullivan's Island, SC
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
17.7 days - Average sunshine days in April:
15.8 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
6.5 days
- Average sunshine days in July:
4.1 days - Average sunshine days in August:
2.8 days - Average sunshine days in September:
7.9 days - Average sunshine days in October:
18.1 days - Average sunshine days in November:
19.1 days - Average sunshine days in December:
18.5 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (2.8 days).
Average UV index
Sullivan's Island, SC
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover
Sullivan's Island, SC
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility
Sullivan's Island, 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).
Sullivan's Island, South Carolina, USA
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