Daylight through the yearLongest day (Jun 21): 14 h 55 min5:43 am – 8:38 pmShortest day (Dec 21): 9 h 25 min7:24 am – 4:49 pm
Sun todaySunrise –Sunset –
Natural hazardsOverall risk Relatively ModerateMontgomery County, MD, compared with all US countiesHigher-risk hazardsWinter weather Very HighHeat wave Relatively HighStrong wind Relatively HighHail Relatively HighSource: FEMA National Risk Index (county level)
Air quality83% of days had good air in 2025299 of 360 days measured61 moderate daysMedian index 39, worst day 90main pollutant: ozoneSource: US EPA Air Quality Index, Montgomery County monitors, MD
Drinking waterWashington Suburban Sanitary Commissionserves 1,900,000 people from surface waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system in the county
