Hanahan weather in May

In May, Hanahan sees average daytime highs of 82°F and overnight lows near 64°F, with 3.4 in of rain across 10 wet days and about 13.7 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 79°F in the first days to 85°F by the end. The sky is clear or mostly clear about 37% of the time in May, and the air most often feels muggy.

Daylight stretches from about 13 h 18 min at the start of May to 14 hours by month's end. Set against the rest of the year, May is Hanahan's 4th-clearest and 7th-windiest month. For the whole year in context, see Hanahan's year-round climate.

Daytime high
82°
5th warmest
Overnight low
64°
8th coldest
Rainfall
3.4 in
10 wet days
Daylight
13 h 42 min
5:26 AM – 7:07 PM
Cloud cover
53%
4th clearest
Wind
7 mph
7th windiest
Solar energy
6.36 kWh/m²
Travel score
6.2
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 79°F in the first days to 85°F by the end.

A typical May day in Hanahan reaches about 82°F in the afternoon and slips back to 64°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 89°F. Set against its neighbours, May runs about 7°F warmer than April and about 5°F cooler than June.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
17960
27960
37960
48061
58061
68061
78062
88062
98162
108162
118163
128163
138163
148264
158264
168264
178264
188265
198365
208365
218365
228366
238366
248466
258467
268467
278467
288567
298568
308568
318568

How May really feels in Hanahan

Once humidity and wind are folded in, May 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

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

Hanahan weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
66040
76040
86139
96139
106040
116040
126040
136040
146040
155941
166040
175941
185941
195941
205842
215743
225743
235743
245545
255545
265545
275446
285347
295347
305248
315149

Chance of precipitation in May

Any precipitation

Hanahan gets around 3.4 in of rain over 10 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 43% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
126
226
326
426
526
627
727
828
928
1029
1129
1230
1330
1431
1531
1632
1733
1833
1934
2034
2135
2235
2336
2437
2537
2638
2739
2840
2941
3042
3143

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 43% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1342224173
2322224183
3312225194
4292225204
5282225224
6272125234
7252126244
8242126254
9232026274
10222026284
11211926295
12211826305
13201726315
14191626336
15181626336
16181525347
17171525358
18161425359
191514253610
201414243612
211313243713
221213243714
231113233716
241012233718
25912223720
26712223722
27611213724
28511213727
29410203629
30310193632
3139193534

Wind in May

Winds average 7 mph in May.

Across May, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 min at the start of May to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:39 AM to 5:18 AM, and sunset from 6:56 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:396:56
213.35:386:57
313.35:376:57
413.45:366:58
513.45:356:59
613.45:347:00
713.55:337:00
813.55:327:01
913.55:317:02
1013.55:307:03
1113.65:297:03
1213.65:297:04
1313.65:287:05
1413.65:277:06
1513.75:267:06
1613.75:267:07
1713.75:257:08
1813.75:247:08
1913.85:247:09
2013.85:237:10
2113.85:227:11
2213.85:227:11
2313.85:217:12
2413.95:217:13
2513.95:207:13
2613.95:207:14
2713.95:197:15
2813.95:197:15
2914.05:187:16
3014.05:187:17
3114.05:187:17

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.36 kWh/m² — the sunniest month for solar.

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 — May's 6.36 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.2Intense
316.2Intense
Planning a trip in May

Hazard calendar for Hanahan

In seasonPeak

None of Hanahan's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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 May a good time to visit Hanahan?

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

6.2
Sightseeing
5th-best month of the year
6.8
Beach & pool
1st-best month of the year

May 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 May

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

In May, Hanahan sees daytime highs around 82°F and nights near 64°F. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

Sea temperature near Hanahan in May

The nearest coast averages about 73°F in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).