Daylight through the yearLongest day (Jun 21): 15 h 19 min5:18 am – 8:37 pmShortest day (Dec 21): 9 h 3 min7:22 am – 4:25 pm
Sun todaySunrise –Sunset –
ClimateWarmest month July: highs 83°F, lows 62°FColdest month January: highs 28°F, lows 12°F37 in of rain a year, on about 70 dayswettest month June37 in of snow a year, on about 22 days13 days above 90°F, 148 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Afton - Janesville Wwtp station, 6 mi away
Nearby landmarksMount Zionpeak · 4.2 miLions Beachbeach · 3.2 miBlackhawk Technical Collegecollege · 5.4 miUniversity of Wisconsin - Whitewater At Rock Countycollege · 5.5 mi3235 Reservoirreservoir · 4.4 miKiwanis Pondlake · 3.3 miSource: USGS Geographic Names Information System
Parks and public landsYouth Sports Complexrecreation area · 1.8 mi · 86 acresOptimist Community Parkpark · 2.0 miRock River Prairie State Natural Areastate conservation land · 7.2 miTurtle Creek Wildlife Areastate recreation area · 10.0 mi · 1,049 acresLima Marsh - Storrs Lake Wildlife Areastate recreation area · 10.1 mi · 2,870 acresStorrs Lake Wildlife Areastate conservation land · 9.3 mi · 751 acresSource: USGS Protected Areas Database (PAD-US)
EarthquakesNone of magnitude 3 or more within 50 miles since 1970Source: USGS Earthquake Catalog
Natural hazardsOverall risk Relatively ModerateRock County, WI, compared with all US countiesHigher-risk hazardsHail Relatively HighTornado Relatively HighCold wave Relatively HighStrong wind Relatively HighSource: FEMA National Risk Index (county level)
Air quality80% of days had good air in 2025159 of 199 days measured39 moderate, 1 unhealthy for sensitive groups daysMedian index 42, worst day 108main pollutant: ozoneSource: US EPA Air Quality Index, Rock County monitors, WI
Drinking waterJanesville Water Utilityserves 64,415 people from ground waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation904 ft276 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalMercyhealth Hospital and Trauma Center5.0 miPost officeDowntown Janesville Post Office4.3 miTown hallLaPrairie Town Hall1.8 miPoliceJanesville Police Department4.5 miFire stationJanesville Fire Department Station 43.4 miSource: USGS National Structures Dataset
Getting aroundAirportChicago Rockford International Airport RFD33 miMajor airportGeneral Mitchell International Airport MKE57 miInterstateI-904.7 miUS highwayUS 14under a mileAmtrakColumbus, WI CBS48 miCoachJanesville Janesville Park and RideFlixBus2.2 miSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 53547 ZIP area.
