Socastee weather in September

In September, Socastee sees average daytime highs of 82°F and overnight lows near 69°F, with 6.2 in of rain across 12.7 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 84°F in the first days to 79°F by the end. The sky is clear or mostly clear about 37% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Socastee's 8th-clearest and 9th-windiest month. For the whole year in context, see Socastee's year-round climate.

Daytime high
82°
4th warmest
Overnight low
69°
9th coldest
Rainfall
6.2 in
12.7 wet days
Daylight
12 h 12 min
6:04 AM – 6:16 PM
Cloud cover
56%
8th clearest
Wind
7 mph
9th windiest
Solar energy
4.56 kWh/m²
Travel score
5.9
out of 10

Socastee is census-designated place in Horry County, South Carolina.

Density
555/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 84°F in the first days to 79°F by the end.

A typical September day in Socastee reaches about 82°F in the afternoon and slips back to 69°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 87°F. Set against its neighbours, September runs about 4°F cooler than August and about 8°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18472
28472
38472
48472
58371
68371
78371
88371
98371
108371
118270
128270
138270
148270
158269
168269
178169
188169
198168
208168
218068
228068
238067
248067
258067
267967
277966
287966
297965
307865

How September really feels in Socastee

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Socastee weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan56° / 40°3.59.1104.1
Feb59° / 42°3.48.310.74.7
Mar65° / 48°3.89.211.76.1
Apr72° / 56°3.1812.87.1
May78° / 64°3.410.413.76.8
Jun84° / 72°5.015.314.24.8
Jul87° / 75°6.418.9143.8
Aug85° / 74°7.018.713.34.1
Sep82° / 69°6.212.712.25.9
Oct74° / 59°3.77.811.27.3
Nov65° / 49°3.17.410.36.5
Dec59° / 43°3.78.79.84.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
24951
35050
45050
55149
65248
75248
85347
95347
105347
115347
125347
135347
145347
155347
165347
175248
185347
195248
205248
215248
225347
235347
245347
255347
265446
275446
285446
295446
305446

Chance of precipitation in September

Any precipitation

Socastee gets around 6.2 in of rain over 12.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 48% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
148
247
346
445
545
644
744
844
943
1043
1143
1242
1342
1441
1541
1641
1741
1841
1941
2041
2141
2241
2341
2440
2539
2639
2738
2837
2937
3036

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1127235215
2128235214
3138245014
4138255013
5149264912
6149264811
71510274710
8151028479
9161028468
10161129457
11271129447
12281129446
13281229436
14291229425
15391329415
163101329414
173101329404
184101429404
194111429393
205111429383
216111529373
227111528363
238121528353
249121628342
2510121628322
2611121728312
2711121727302
2812131727292
2913131827271
3014141827261

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:54 AM to 6:14 AM, and sunset from 6:38 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:546:38
212.75:546:36
312.75:556:35
412.65:566:34
512.65:566:32
612.65:576:31
712.55:586:29
812.55:596:28
912.55:596:27
1012.46:006:25
1112.46:016:24
1212.36:016:22
1312.36:026:21
1412.36:036:19
1512.26:036:18
1612.26:046:16
1712.26:056:15
1812.16:066:14
1912.16:066:12
2012.16:076:11
2112.06:086:09
2212.06:086:08
2312.06:096:06
2411.96:106:05
2511.96:116:04
2611.86:116:02
2711.86:126:01
2811.86:135:59
2911.76:135:58
3011.76:145:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.56 kWh/m².

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 6.23 kWh/m² in May across the year — September's 4.56 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.4Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Socastee

In seasonPeak

In September, Socastee sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Socastee sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Socastee?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.9
Sightseeing
6th-best month of the year
6.3
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Socastee for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Socastee in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Socastee sees daytime highs around 82°F and nights near 69°F. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Socastee in September

The nearest coast averages about 80°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 8 mi away) is warmest in August at about 82°F and coldest in February near 60°F.

It's comfortable for a long swim from Apr 28 to Nov 16 — about 6.7 months when the water holds above 68°F.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan61Cool
Feb60Cool
Mar61Cool
Apr65Cool
May72Refreshing
Jun79Warm
Jul82Warm
Aug82Warm
Sep80Warm
Oct75Refreshing
Nov68Refreshing
Dec64Cool

UV index in Socastee in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Socastee peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 13UV 10Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May9Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Socastee in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Socastee is worst in March — around 21 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodMar 1719 µg/m³Dec 146 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb12Good
Mar21Moderate
Apr12Moderate
May11Good
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep9Good
Oct6Good
Nov7Good
Dec6Good
Location & terrain

Where is Socastee?

Socastee sits at 33.7°N, 79.0°W, 16 ft above sea level, in United States. The nearest listed city is Myrtle Beach, 6.2 mi away.

Topography around Socastee

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Socastee.

Within 2 miles, the terrain around Socastee has only modest variations in elevation — a maximum elevation change of 95 ft around an average of 33 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 125 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 210 ft.

The land around Socastee is covered by trees (56%) and artificial surfaces (20%) within 2 miles, trees (52%) and water (24%) within 10 miles, and trees (58%) and water (27%) within 50 miles.

2 miles
95 ft
10 miles
125 ft
50 miles
210 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Myrtle Beach 6.2 mi · Conway 11 mi · North Myrtle Beach 21 mi · Florence 57 mi · Lumberton 65 mi · Leland 68 mi · Wilmington 71 mi · Goose Creek 77 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Socastee (33.6835°, -78.9984°, elevation 16 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).