Daylight through the yearLongest day (Jun 21): 14 h 55 min5:45 am – 8:40 pmShortest day (Dec 21): 9 h 25 min7:26 am – 4:51 pm
Sun todaySunrise –Sunset –
ClimateWarmest month July: highs 86°F, lows 66°FColdest month January: highs 41°F, lows 25°F44 in of rain a yearwettest month September20 in of snow a year, on about 6 days30 days above 90°F, 115 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Purcellville station, 5 mi away; snow from The Plains 2 Nne
Nearby landmarksRound Toppeak · under a milePrecision Dynamics Lakelake · 1.4 miSleeter Lakelake · 1.6 miCool Springspring · 4.9 miRound Hill Reservoirreservoir · 2.1 miWashington and Old Dominion Railroad Regional Park Purcellville West Trailheadpark · 4.4 miSource: USGS Geographic Names Information System
Parks and public landsRound Hill Community Centerpark · 1.3 miTown Of Round Hill Parkpark · 1.7 miShannondale Springs Wildlife Management Areastate conservation land · 5.0 mi · 1,640 acresSweet Run State Parkstate park · 11.1 mi · 604 acresLoudoun - future State Parkstate park · 11.1 mi · 604 acresSky Meadows State Parkstate park · 11.5 mi · 490 acresSource: USGS Protected Areas Database (PAD-US)
Earthquakes3 of magnitude 3 or more within 50 miles since 19700 of magnitude 4+, 0 of magnitude 5+Largest: magnitude 3.6 on 16 Jul 201023 mi away, near Barnesville, MarylandMost recent: magnitude 3.0 on 17 Jan 201614 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively LowLoudoun County, VA, compared with all US countiesHigher-risk hazardsWinter weather Relatively HighLightning Relatively HighStrong wind Relatively HighSource: FEMA National Risk Index (county level)
Air quality81% of days had good air in 2025294 of 365 days measured70 moderate, 1 unhealthy for sensitive groups daysMedian index 40, worst day 120main pollutant: ozoneSource: US EPA Air Quality Index, Loudoun County monitors, VA
Drinking waterTown of Round Hillserves 5,055 people from ground waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation753 ft230 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalJefferson Medical Center12.6 miPost officeRound Hill Post Office1.4 miTown hallRound Hill Town Hall1.5 miPoliceLoudoun County Sheriff's Office Western Loudoun Station1.1 miFire stationRound Hill Fire and Rescue Company 41.4 miSource: USGS National Structures Dataset
SchoolsWithin 2 miNo schools listedCollegePatrick Henry College5.5 miSource: USGS National Structures Dataset
Getting aroundAirportWashington Dulles International Airport IAD22 miInterstateI-6617 miUS highwayUS 3408.4 miAmtrakManassas, VA MSS31 miRailHARPERS FERRY W VA MARC ebMaryland Transit Administration (MTA)14 miCoachSterling, VA (Dulles Town Center Park and Ride Lot)OurBus20 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 20142 ZIP area.
