Daylight through the yearLongest day (Jun 21): 14 h 49 min5:40 am – 8:29 pmShortest day (Dec 21): 9 h 31 min7:15 am – 4:46 pm
Sun todaySunrise –Sunset –
People4,006 residentsin the ZIP code areaMedian age 38.11,537 householdsMedian household income $52,482Median home value $149,800Median rent $925 a month84% of homes owner-occupiedMedian property tax $849 a yearSource: US Census Bureau, American Community Survey 2020-2024
Work and commuting2.2% unemployment rate52% of adults are in the labour force, 1,564 employedMain industries: manufacturing 26%, education and health care 20%, construction 13%Average commute 42 minutes79% drive alone, 11% car-pool, 2% walk or cycle, 8% work from homeSource: US Census Bureau, American Community Survey 2020-2024, ZIP area
Education and languages9% of adults have a bachelor's degree or higher89% finished high school, 5% hold a graduate degreeLanguages at home: English only 98%, Spanish 1%2% speak English less than very wellSource: US Census Bureau, American Community Survey 2020-2024, ZIP area
ClimateWarmest month July: highs 86°F, lows 67°FColdest month January: highs 40°F, lows 21°F45 in of rain a year, on about 73 dayswettest month May12 in of snow a year, on about 9 days23 days above 90°F, 103 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Potosi 4 Sw station, 11 mi away
Nearby landmarksSugar Hillpeak · under a milePowder Spring Lakelake · 2.2 miFloyd Lakelake · 2.8 miPowder Springspring · 2.0 miCrystal Springspring · 2.1 miBezidek Hill (historical)peak · 2.1 miSource: USGS Geographic Names Information System
Parks and public landsWashington State Parkstate park · 3.3 mi · 1,784 acresMo Dnr (Washington State Park Access)state park · 5.1 miKingston Accessstate recreation area · 4.5 mi · 56 acresWashington State Park Hardwoods Natural Areastate conservation land · 4.5 mi · 63 acresMerrill Horse Accessstate recreation area · 9.0 mi · 80 acresSaint Francois State Parkstate park · 10.3 mi · 2,530 acresSource: USGS Protected Areas Database (PAD-US)
Earthquakes9 of magnitude 3 or more within 50 miles since 19701 of magnitude 4+, 0 of magnitude 5+Largest: magnitude 4.2 on 11 Dec 197620 mi away, near Sullivan, MissouriMost recent: magnitude 3.9 on 7 Jun 201111 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively LowWashington County, MO, compared with all US countiesHighest-rated hazardsHeat wave Relatively ModerateCold wave Relatively ModerateSource: FEMA National Risk Index (county level)
Air quality73% of days had good air in 2025268 of 365 days measured93 moderate, 4 unhealthy for sensitive groups daysMedian index 42, worst day 150main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, nearest monitors: Jefferson County, MO, 19 mi away
Internet at home83% of households have a broadband subscription35% have cable, fibre or DSL41% rely on a mobile data plan alone16% have no internet at homeSource: US Census Bureau, American Community Survey 2020-2024
Drinking waterPotosi PWSserves 2,527 people from ground waterNo health-based violations since 20213 monitoring or reporting violations since 2021Source: US EPA Safe Drinking Water Information System, largest system in the county
Elevation924 ft282 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalWashington County Memorial Hospital7.6 miPost officeCadet Post Office3.6 miTown hallPotosi City Hall7.4 miPoliceWashington County Sheriff's Office7.4 miFire stationPotosi Fire Protection District House 42.8 miSource: USGS National Structures Dataset
Getting aroundAirportSt. Louis Lambert International Airport STL53 miInterstateI-5521 miUS highwayUS 6711 miAmtrakArcadia, MO ACD31 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 63630 ZIP area.
