Daylight through the yearLongest day (Jun 21): 14 h 37 min6:19 am – 8:56 pmShortest day (Dec 21): 9 h 42 min7:42 am – 5:24 pm
Sun todaySunrise –Sunset –
Natural hazardsOverall risk Relatively ModerateKnox County, TN, compared with all US countiesHigher-risk hazardsLightning Very HighTornado Relatively HighWinter weather Relatively HighCold wave Relatively HighSource: FEMA National Risk Index (county level)
Air quality63% of days had good air in 2025230 of 365 days measured134 moderate, 1 unhealthy daysMedian index 46, worst day 156main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, Knox County monitors, TN
Drinking waterKnoxville Utilities Board - Kubserves 254,671 people from surface waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
