Daylight through the yearLongest day (Jun 21): 14 h 18 min6:13 am – 8:31 pmShortest day (Dec 21): 10 h 0 min7:18 am – 5:18 pm
Sun todaySunrise –Sunset –
ClimateWarmest month July: highs 88°F, lows 77°FColdest month January: highs 58°F, lows 44°F44 in of rain a year, on about 65 dayswettest month AugustSnow is rare25 days above 90°F, 6 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Charleston City station, 11 mi away; snow from Charleston Intl Ap
Parks and public landsAngel Oak Parkpark · 2.4 miJohns Island County Park / Mullet Hall Equestrian Centerpark · 2.4 mi · 744 acresBird Key-Stono Seabird Sanctuarystate conservation land · 7.1 miDungannon Plantation Heritage Preserve / Wildlife Management Areastate conservation land · 7.2 mi · 668 acresFort Lamar Heritage Preservestate historic site · 8.5 miBotany Bay Plantation Heritage Preserve / Wildlife Management Areastate conservation land · 11.3 mi · 3,599 acresSource: USGS Protected Areas Database (PAD-US)
Earthquakes18 of magnitude 3 or more within 50 miles since 19703 of magnitude 4+, 0 of magnitude 5+Largest: magnitude 4.7 on 22 Nov 197415 mi away, near Ladson, South CarolinaMost recent: magnitude 3.3 on 27 Sep 202118 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively HighCharleston County, SC, compared with all US countiesHigher-risk hazardsCoastal flooding Very HighHurricane Very HighEarthquake Relatively HighIce storm Relatively HighSource: FEMA National Risk Index (county level)
Air quality61% of days had good air in 2025222 of 365 days measured142 moderate, 1 unhealthy for sensitive groups daysMedian index 47, worst day 105main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, Charleston County monitors, SC
Drinking waterSt John's Water (sc1020002)serves 22,592 people from surface water purchasedNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation1 ft0 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalBon Secours Saint Francis Hospital9.1 miPost officeJohns Island Post Office4.9 miTown hallKiawah Island Town Hall6.1 miPoliceFolly Beach Police Department9.0 miFire stationSaint Johns Fire Department Station 52.3 miSource: USGS National Structures Dataset
SchoolsWithin 2 miNo schools listedCollegeCharleston School of Massage8.3 miSource: USGS National Structures Dataset
Getting aroundAirportCharleston International Airport CHS15 miInterstateI-5268.2 miUS highwayUS 177.6 miAmtrakCharleston, SC CHS14 miCoachNorth Charleston 4565 Gaynor AveGreyhound14 miTransit8 stops within a mileTriCounty Link, Charleston Area Regional Transportation Authority (CARTA)Sources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 29457 ZIP area.
