Daylight through the yearLongest day (Jun 21): 15 h 21 min5:51 am – 9:12 pmShortest day (Dec 21): 9 h 1 min7:57 am – 4:58 pm
Sun todaySunrise –Sunset –
ClimateWarmest month July: highs 87°F, lows 64°FColdest month January: highs 30°F, lows 10°F29 in of rain a year, on about 55 dayswettest month June38 in of snow a year, on about 17 days33 days above 90°F, 158 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Yankton 2 E station, 5 mi away
Nearby landmarksMount Marty Collegecollege · 3.4 miPierson Ranch Recreation Area Campgroundcampground · 3.5 miLake Yanktonlake · 3.9 miLewis and Clark Recreation Area Yankton Section Campgroundcampground · 4.6 miGreen Island (historical)island · 4.6 miGavins Pointcape · 6.7 miSource: USGS Geographic Names Information System
Parks and public landsHatchery Unitstate recreation area · 3.1 miYankton Unitstate recreation area · 3.2 mi · 208 acresPierson Ranchstate recreation area · 3.3 mi · 68 acresPowerhouse And Dam Unitstate recreation area · 3.3 miYankton Island Unitstate recreation area · 3.8 mi · 122 acresChief White Crane Recreation Areastate recreation area · 3.8 mi · 209 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 15 Nov 198221 mi away, near Tyndall, South DakotaMost recent: magnitude 3.0 on 10 Dec 202325 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively LowYankton County, SD, compared with all US countiesHigher-risk hazardsDrought Relatively HighWinter weather Relatively HighIce storm Relatively HighSource: FEMA National Risk Index (county level)
Air quality88% of days had good air in 2025308 of 351 days measured41 moderate, 2 unhealthy for sensitive groups daysMedian index 34, worst day 117main pollutant: ozoneSource: US EPA Air Quality Index, nearest monitors: Clay County, SD, 24 mi away
Drinking waterYanktonserves 15,411 people from ground waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation1,347 ft411 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalSouth Dakota Human Services Center2.3 miPost officeYankton Post Office2.6 miTown hallYankton City Hall4.0 miPoliceYankton Police Department4.1 miFire stationYankton Fire Department Station 23.1 miSource: USGS National Structures Dataset
