Daylight through the yearLongest day (Jun 21): 13 h 13 min5:50 am – 7:02 pmShortest day (Dec 21): 11 h 3 min6:51 am – 5:54 pm
Sun todaySunrise –Sunset –
ClimateWarmest month August: highs 90°F, lows 77°FColdest month January: highs 85°F, lows 72°F54 in of rain a year, on about 95 dayswettest month SeptemberSnow is rare99 days above 90°F, 0 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Guayama 2e, Pr Rq station, 4 mi away
Nearby landmarksInstituto Tecnologico Recinto De Guayamacollege · 2.5 miCerro Charcaspeak · 1.3 miUniversidad Interamericana de Puerto Rico - Recinto de Guayamacollege · 3.5 miLago Melaniareservoir · 2.4 miCerro Tumbadopeak · 2.6 miPunta Barrancascape · 4.4 miSource: USGS Geographic Names Information System
Earthquakes2,359 of magnitude 3 or more within 50 miles since 1970129 of magnitude 4+, 14 of magnitude 5+Largest: magnitude 6.4 on 7 Jan 202045 mi away, near Indios, Puerto RicoMost recent: magnitude 3.1 on 20 Sep 202631 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Insufficient DataGuayanilla 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, 30 mi away
Drinking waterGuayama Urbanoserves 37,076 people from surface water1 health-based violation since 2021latest Oct 2022: surface water treatment, treatment techniqueSource: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation1,003 ft306 m above sea levelSource: USGS 3D Elevation Program
SchoolsWithin 2 mi2 schools1 elementary, 1 otherElementaryEscuela Rafael Antonio Delgado Mateo1.6 miSchoolEscuela Genaro Cautino2.0 miCollegeInstituto Tecnologico Recinto De Guayama2.5 miSource: USGS National Structures Dataset
Distances in these cards are measured from the centre of the 00785 ZIP area.
