Daylight through the yearLongest day (Jun 21): 15 h 6 min5:23 am – 8:30 pmShortest day (Dec 21): 9 h 15 min7:15 am – 4:30 pm
Sun todaySunrise –Sunset –
Natural hazardsOverall risk Relatively HighNassau County, NY, compared with all US countiesHigher-risk hazardsWinter weather Very HighIce storm Very HighCoastal flooding Very HighLightning Very HighSource: FEMA National Risk Index (county level)
Air quality79% of days had good air in 2025287 of 364 days measured77 moderate daysMedian index 29, worst day 92main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, Nassau County monitors, NY
Drinking waterManhasset Lakeville WDserves 43,000 people from ground waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
