Daylight through the yearLongest day (Jun 21): 13 h 14 min5:49 am – 7:03 pmShortest day (Dec 21): 11 h 2 min6:51 am – 5:53 pm
Sun todaySunrise –Sunset –
ClimateWarmest month August: highs 90°F, lows 73°FColdest month January: highs 85°F, lows 66°F76 in of rain a yearwettest month NovemberSnow is rare155 days above 90°F, 0 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Rio Piedras Exp Stn, Pr Rq station, 4 mi away; snow from Trujillo Alto 2 Ssw, Pr Rq
Earthquakes1,821 of magnitude 3 or more within 50 miles since 197062 of magnitude 4+, 4 of magnitude 5+Largest: magnitude 5.6 on 7 Jan 202050 mi away, near Magas Arriba, Puerto RicoMost recent: magnitude 3.1 on 20 Sep 202643 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Insufficient DataGuaynabo Municipio, PR, compared with all US countiesSource: FEMA National Risk Index (county level)
Air quality82% of days had good air in 202593 of 114 days measured21 moderate daysMedian index 33, worst day 67main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, Guaynabo County monitors, PR
Drinking waterUs Army, Fort Buchananserves 6,411 people from surface waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation69 ft21 m above sea levelSource: USGS 3D Elevation Program
SchoolsWithin 2 mi29 schools8 elementary, 2 middle, 3 high, 16 otherSchoolColegio Adianezunder a mileHighEscuela Margarita Janer Palaciosunder a mileElementaryAcademia Sally Olsenunder a mileCollegeAtlantic University Collegeunder a mileSource: USGS National Structures Dataset
Distances in these cards are measured from the centre of the 00970 ZIP area.
