Daylight through the yearLongest day (Jun 21): 14 h 16 min5:17 am – 7:33 pmShortest day (Dec 21): 10 h 2 min7:20 am – 5:22 pm
Sun todaySunrise –Sunset –
Natural hazardsOverall risk Relatively HighPima County, AZ, compared with all US countiesHigher-risk hazardsHeat wave Very HighRiver flooding Very HighLightning Very HighWildfire Relatively HighSource: FEMA National Risk Index (county level)
Air quality34% of days had good air in 2025123 of 365 days measured234 moderate, 3 unhealthy for sensitive groups, 5 unhealthy daysMedian index 54, worst day 357main pollutant: ozoneSource: US EPA Air Quality Index, Pima County monitors, AZ
Drinking waterCity of Tucsonserves 732,906 people from ground waterNo health-based violations since 202132 monitoring or reporting violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
