Daylight through the yearLongest day (Jun 21): 13 h 14 min5:48 am – 7:02 pmShortest day (Dec 21): 11 h 2 min6:51 am – 5:52 pm
Sun todaySunrise –Sunset –
ClimateWarmest month September: highs 89°F, lows 76°FColdest month February: highs 83°F, lows 70°F65 in of rain a year, on about 123 dayswettest month NovemberSnow is rare60 days above 90°F, 0 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Wfo San Juan, Pr Rq station, 1 mi away; snow from San Juan L M Marin Ap, Pr Rq
Earthquakes1,747 of magnitude 3 or more within 50 miles since 197043 of magnitude 4+, 2 of magnitude 5+Largest: magnitude 5.1 on 24 Dec 201015 mi away, near Aguas Buenas, Puerto RicoMost recent: magnitude 3.1 on 19 Sep 202636 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Insufficient DataCarolina Municipio, PR, compared with all US countiesSource: FEMA National Risk Index (county level)
Air quality61% of days had good air in 2025209 of 345 days measured136 moderate daysMedian index 45, worst day 99main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, nearest monitors: Catano County, PR, 10 mi away
Drinking waterSistema de Agua Dual Barrazaserves 800 people from ground water1 health-based violation since 2021latest Oct 2024: lead and copper, treatment technique1 monitoring or reporting violation since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation30 ft9 m above sea levelSource: USGS 3D Elevation Program
