Daylight through the yearLongest day (Jun 21): 14 h 6 min5:56 am – 8:02 pmShortest day (Dec 21): 10 h 12 min6:50 am – 5:01 pm
Sun todaySunrise –Sunset –
ClimateWarmest month August: highs 89°F, lows 74°FColdest month January: highs 59°F, lows 42°F65 in of rain a year, on about 76 dayswettest month JulySnow is rare48 days above 90°F, 18 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Waveland station, 6 mi away; snow from Stennis-diamondhead
Parks and public landsHancock County Marsh Coastal Reservestate conservation land · under a mile · 18,067 acresBuccaneer State Parkstate park · 4.2 mi · 443 acresGrand Bayou Coastal Reservestate conservation land · 4.2 mi · 309 acresBayou Lacroix Coastal Reservestate conservation land · 4.3 mi · 1,081 acresPearl River Wildlife Management Areastate conservation land · 7.0 mi · 36,386 acresJourdan River Coastal Reservestate conservation land · 7.2 mi · 4,311 acresSource: USGS Protected Areas Database (PAD-US)
EarthquakesNone of magnitude 3 or more within 50 miles since 1970Source: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively ModerateHancock County, MS, compared with all US countiesHigher-risk hazardsHurricane Relatively HighLightning Relatively HighCoastal flooding Relatively HighSource: FEMA National Risk Index (county level)
Air quality70% of days had good air in 2025256 of 365 days measured109 moderate daysMedian index 43, worst day 84main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, Hancock County monitors, MS
Drinking waterCity of Bay St Louisserves 9,284 people from ground water5 health-based violations since 2021latest Oct 2024: trihalomethanes (TTHM), maximum contaminant level5 monitoring or reporting violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation15 ft5 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalHancock Medical Center8.2 miPost officeBay Saint Louis Post Office7.4 miTown hallWaveland City Hall6.6 miPoliceHancock County Sheriff's Office2.4 miFire stationBay Side Volunteer Fire Department2.9 miSource: USGS National Structures Dataset
Getting aroundAirportGulfport Biloxi International Airport GPT26 miMajor airportLouis Armstrong New Orleans International Airport MSY51 miInterstateI-105.0 miUS highwayUS 902.6 miAmtrakBay Saint Louis, MS BAS9.2 miCoachSlidell Fremaux Quick StopGreyhound18 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 39521 ZIP area.
