Daylight through the yearLongest day (Jun 21): 15 h 0 min5:33 am – 8:33 pmShortest day (Dec 21): 9 h 21 min7:19 am – 4:40 pm
Sun todaySunrise –Sunset –
Natural hazardsOverall risk Relatively HighNew Castle County, DE, compared with all US countiesHigher-risk hazardsWinter weather Very HighRiver flooding Relatively HighCold wave Relatively HighIce storm Relatively HighSource: FEMA National Risk Index (county level)
Air quality64% of days had good air in 2025235 of 365 days measured126 moderate, 3 unhealthy for sensitive groups, 1 unhealthy daysMedian index 44, worst day 161main pollutant: ozoneSource: US EPA Air Quality Index, New Castle County monitors, DE
Drinking waterWilmington Water Departmentserves 107,976 people from surface waterNo health-based violations since 20211 monitoring or reporting violation since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
