Daylight through the yearLongest day (Jun 21): 15 h 22 min5:57 am – 9:19 pmShortest day (Dec 21): 9 h 0 min8:04 am – 5:04 pm
Sun todaySunrise –Sunset –
People22 residentsin the ZIP code areaMedian age 56.512 households92% of homes owner-occupiedSource: US Census Bureau, American Community Survey 2020-2024
ClimateWarmest month July: highs 87°F, lows 62°FColdest month January: highs 31°F, lows 11°F26 in of rain a year, on about 48 dayswettest month May37 in of snow a year, on about 14 days26 days above 90°F, 162 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Bonesteel station, 8 mi away
Parks and public landsHerrick Lakestate recreation area · 6.7 mi · 158 acresFairfax Damstate conservation land · 10.5 mi · 53 acresBurke Lakestate recreation area · 12.3 mi · 205 acresWhetstone Bay Recreation Areastate recreation area · 13.6 mi · 79 acresSouth Wheeler Recreation Areastate recreation area · 15.3 mi · 249 acresNorth Wheeler Recreation Areastate recreation area · 15.6 mi · 165 acresSource: USGS Protected Areas Database (PAD-US)
Earthquakes4 of magnitude 3 or more within 50 miles since 19701 of magnitude 4+, 0 of magnitude 5+Largest: magnitude 4.3 on 3 Nov 200221 mi away, near Butte, NebraskaMost recent: magnitude 3.1 on 4 Jun 202119 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Very LowGregory County, SD, compared with all US countiesHighest-rated hazardsCold wave Relatively ModerateWinter weather Relatively ModerateSource: FEMA National Risk Index (county level)
Air quality92% of days had good air in 2025320 of 348 days measured24 moderate, 4 unhealthy for sensitive groups daysMedian index 36, worst day 115main pollutant: ozoneSource: US EPA Air Quality Index, nearest monitors: Knox County, NE, 67 mi away
Internet at home83% of households have a broadband subscription25% have cable, fibre or DSL33% rely on a mobile data plan alone17% have no internet at homeSource: US Census Bureau, American Community Survey 2020-2024
Drinking waterTripp County Water User Districtserves 4,860 people from ground waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system in the county
Elevation2,002 ft610 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalCommunity Memorial Hospital14.2 miPost officeNaper Post Office5.4 miFire stationNaper Volunteer Fire Department5.4 miSource: USGS National Structures Dataset
Getting aroundAirportPierre Regional Airport PIR110 miUS highwayUS 182.6 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 57571 ZIP area.
