North Myrtle Beach weather in September

In September, North Myrtle Beach sees average daytime highs of 80°F and overnight lows near 71°F, with 6.4 in of rain across 12.9 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 82°F in the first days to 78°F by the end. The sky is clear or mostly clear about 40% 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 North Myrtle Beach's 7th-clearest and 9th-windiest month. For the whole year in context, see North Myrtle Beach's year-round climate.

Daytime high
80°
4th warmest
Overnight low
71°
9th coldest
Rainfall
6.4 in
12.9 wet days
Daylight
12 h 12 min
6:03 AM – 6:15 PM
Cloud cover
55%
7th clearest
Wind
9 mph
9th windiest
Solar energy
4.58 kWh/m²
Travel score
6.2
out of 10

North Myrtle Beach is city in Horry County, South Carolina, United States.

Density
352/km²
people per km²
Founded
1735

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 82°F in the first days to 78°F by the end.

A typical September day in North Myrtle Beach reaches about 80°F in the afternoon and slips back to 71°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 85°F. Set against its neighbours, September runs about 4°F cooler than August and about 7°F warmer than October.

60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18374
28274
38274
48274
58274
68273
78273
88273
98273
108173
118172
128172
138172
148172
158072
168071
178071
188071
198071
208071
217970
227970
237970
247969
257869
267869
277869
287868
297868
307768

How September really feels in North Myrtle Beach

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.

North Myrtle Beach weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan56° / 44°3.79.5104.0
Feb58° / 45°3.78.910.74.4
Mar63° / 51°4.08.911.75.8
Apr70° / 58°3.07.612.86.9
May76° / 66°3.19.413.77.1
Jun82° / 73°4.313.114.25.7
Jul85° / 76°5.516.6144.5
Aug84° / 76°6.717.113.34.7
Sep80° / 71°6.412.912.26.2
Oct73° / 62°4.07.911.17.3
Nov65° / 52°3.37.910.26.4
Dec59° / 47°4.19.49.84.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35248
45347
55347
65347
75347
85347
95545
105545
115545
125545
135446
145446
155446
165446
175446
185347
195347
205347
215446
225347
235446
245446
255446
265545
275545
285545
295545
305644

Chance of precipitation in September

Any precipitation

North Myrtle Beach gets around 6.4 in of rain over 12.9 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 47% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
147
247
346
445
545
644
744
844
943
1043
1142
1242
1342
1441
1541
1641
1741
1841
1941
2042
2141
2241
2341
2440
2540
2639
2738
2838
2937
3037

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 44% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1126215218
2126225217
3126235216
4136235215
5137245114
6137255113
7148265012
8148264911
9159274910
1015927489
11161028488
12161028477
13171128467
14171228466
15281228456
16281328455
17281328445
18291327444
19391427434
20391427434
214101427423
225101427413
236101527393
247111527383
258111527372
269121527352
2710121527342
2811121627332
2911131628311
3012131628301

Wind in September

Winds average 9 mph in September.

Across September, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze

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 5:52 AM to 6:13 AM, and sunset from 6:37 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:526:37
212.75:536:35
312.75:546:34
412.65:546:32
512.65:556:31
612.65:566:30
712.55:576:28
812.55:576:27
912.55:586:25
1012.45:596:24
1112.45:596:22
1212.46:006:21
1312.36:016:20
1412.36:016:18
1512.26:026:17
1612.26:036:15
1712.26:046:14
1812.16:046:12
1912.16:056:11
2012.16:066:09
2112.06:066:08
2212.06:076:07
2312.06:086:05
2411.96:096:04
2511.96:096:02
2611.86:106:01
2711.86:115:59
2811.86:115:58
2911.76:125:57
3011.76:135:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 6.3 kWh/m² in May across the year — September's 4.58 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
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
244.4Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for North Myrtle Beach

In seasonPeak

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

North Myrtle Beach 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 North Myrtle Beach?

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

6.2
Sightseeing
5th-best month of the year
6.2
Beach & pool
2nd-best month of the year

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

What to pack for North Myrtle Beach in September

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

In September, North Myrtle Beach sees daytime highs around 80°F and nights near 71°F. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near North Myrtle Beach 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 offshore is warmest in August at about 83°F and coldest in February near 59°F.

It's comfortable for a long swim from Apr 29 to Nov 14 — about 6.6 months when the water holds above 68°F.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan60Cool
Feb59Bracing
Mar61Cool
Apr65Cool
May72Refreshing
Jun79Warm
Jul82Warm
Aug83Tropical
Sep80Warm
Oct74Refreshing
Nov68Cool
Dec62Cool

UV index in North Myrtle Beach in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in North Myrtle Beach peaks around July 14 at about 9 (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 14UV 9Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in North Myrtle Beach 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 North Myrtle Beach 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 North Myrtle Beach?

North Myrtle Beach sits at 33.8°N, 78.7°W, 7 ft above sea level, in United States. The nearest listed city is Myrtle Beach, 15 mi away.

Topography around North Myrtle Beach

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

Within 2 miles, the terrain around North Myrtle Beach has only modest variations in elevation — a maximum elevation change of 102 ft around an average of 16 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 138 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 230 ft.

The land around North Myrtle Beach is covered by water (49%) within 2 miles, water (48%) and trees (37%) within 10 miles, and trees (55%) and water (31%) within 50 miles.

2 miles
102 ft
10 miles
138 ft
50 miles
230 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Myrtle Beach 15 mi · Socastee 21 mi · Conway 21 mi · Leland 47 mi · Wilmington 51 mi · Lumberton 58 mi · Florence 67 mi · Laurinburg 80 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 North Myrtle Beach (33.816°, -78.68°, elevation 7 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).