Hanahan weather in September

In September, Hanahan sees average daytime highs of 84°F and overnight lows near 68°F, with 5.2 in of rain across 13.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 86°F in the first days to 81°F by the end. The sky is clear or mostly clear about 34% 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 Hanahan's 8th-clearest and 9th-windiest month. For the whole year in context, see Hanahan's year-round climate.

Daytime high
84°
4th warmest
Overnight low
68°
9th coldest
Rainfall
5.2 in
13.1 wet days
Daylight
12 h 12 min
6:08 AM – 6:20 PM
Cloud cover
57%
8th clearest
Wind
6 mph
9th windiest
Solar energy
4.68 kWh/m²
Travel score
5.3
out of 10

Hanahan is city in Berkeley County, South Carolina, United States of America.

Density
650/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 86°F in the first days to 81°F by the end.

A typical September day in Hanahan reaches about 84°F in the afternoon and slips back to 68°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 90°F. Set against its neighbours, September runs about 4°F cooler than August and about 7°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18672
28672
38671
48671
58671
68571
78571
88570
98570
108570
118570
128569
138469
148469
158469
168469
178468
188368
198368
208367
218367
228367
238267
248266
258266
268266
278165
288165
298165
308164

How September really feels in Hanahan

Once humidity and wind are folded in, September averages 8 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
8
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Hanahan weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 40°3.28.310.14.8
Feb62° / 42°3.3810.85.5
Mar68° / 48°3.38.511.76.7
Apr75° / 56°3.17.812.87.3
May82° / 64°3.41013.76.2
Jun87° / 71°5.816.414.14.0
Jul89° / 74°6.218.7143.2
Aug88° / 74°6.818.713.23.6
Sep84° / 68°5.213.112.25.3
Oct76° / 58°3.87.811.27.3
Nov68° / 47°2.66.910.36.9
Dec61° / 42°3.589.95.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% 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 (%)
14753
24753
34852
44951
54951
65149
75248
85248
95347
105347
115446
125446
135446
145446
155446
165347
175347
185347
195248
205248
215248
225248
235149
245149
255248
265347
275347
285248
295248
305248

Chance of precipitation in September

Any precipitation

Hanahan gets around 5.2 in of rain over 13.1 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 43% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
150
250
349
448
547
647
746
845
945
1044
1144
1243
1343
1443
1542
1642
1742
1842
1942
2042
2141
2241
2341
2440
2540
2639
2739
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 75% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1025225615
2035235514
3036245413
4046245412
5047255311
6057265210
7058265110
816926499
9161027498
10171027487
11171127476
12181227476
13181227465
14281327455
15291427454
16291427444
17291527443
183101526433
193101626423
204101626423
215101725412
225101725402
236111725392
247111824382
258111824362
269121824352
2710121824342
2811121924322
2912131924312
3013131924292

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:58 AM to 6:18 AM, and sunset from 6:41 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:586:41
212.75:596:40
312.66:006:39
412.66:006:37
512.66:016:36
612.56:026:34
712.56:026:33
812.56:036:32
912.46:046:30
1012.46:046:29
1112.46:056:27
1212.36:066:26
1312.36:066:25
1412.36:076:23
1512.26:086:22
1612.26:086:20
1712.26:096:19
1812.16:106:18
1912.16:106:16
2012.16:116:15
2112.06:126:13
2212.06:126:12
2312.06:136:11
2411.96:146:09
2511.96:156:08
2611.96:156:06
2711.86:166:05
2811.86:176:04
2911.76:176:02
3011.76:186:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.68 kWh/m².

For context, solar energy here swings from a low near 2.57 kWh/m² to a high of 6.36 kWh/m² in May across the year — September's 4.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.6Bright
194.6Bright
204.6Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.4Bright
264.4Bright
274.4Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Hanahan

In seasonPeak

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

Hanahan 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 Hanahan?

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

5.3
Sightseeing
8th-best month of the year
6.4
Beach & pool
2nd-best month of the year

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

What to pack for Hanahan in September

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

In September, Hanahan sees daytime highs around 84°F and nights near 68°F. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Hanahan in September

The nearest coast averages about 81°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 21 mi away) is warmest in August at about 83°F and coldest in February near 59°F.

It's comfortable for a long swim from Apr 25 to Nov 14 — about 6.7 months when the water holds above 68°F.

60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan60Cool
Feb59Cool
Mar61Cool
Apr66Cool
May73Refreshing
Jun80Warm
Jul83Tropical
Aug83Tropical
Sep81Warm
Oct75Refreshing
Nov67Cool
Dec63Cool

UV index in Hanahan 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 Hanahan 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
Jan4Moderate
Feb5Moderate
Mar7High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Hanahan 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 Hanahan is worst in March — around 20 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1819 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb12Good
Mar20Moderate
Apr14Moderate
May13Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is Hanahan?

Hanahan sits at 32.9°N, 80.0°W, 52 ft above sea level, in United States. The nearest listed city is Goose Creek, 4.3 mi away.

Topography around Hanahan

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

Within 2 miles, the terrain around Hanahan has only modest variations in elevation — a maximum elevation change of 89 ft around an average of 36 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 187 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 256 ft.

The land around Hanahan is covered by trees (45%) and artificial surfaces (30%) within 2 miles, trees (60%) within 10 miles, and trees (57%) and water (31%) within 50 miles.

2 miles
89 ft
10 miles
187 ft
50 miles
256 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Goose Creek 4.3 mi · North Charleston 5.0 mi · Charleston 11 mi · Summerville 11 mi · Mount Pleasant 12 mi · Hilton Head 65 mi · Hilton Head Island 65 mi · Bluffton 68 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 Hanahan (32.9185°, -80.022°, elevation 52 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).