UV Index Today in Colorado (CO)

Friday, May 22, 2026 -11:46 AMMDT (GMT-6)

The average maximum UV Index today across 286 locations in Colorado (CO), is 8.2. The highest projected maximum is 10 in Silver Cliff at 1:00 PM MDT, while the lowest projected maximum is 6.6 in Redlands at 3:00 PM MDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 8.8. The highest projected maximum is 10.1 in Crested Butte at 1:00 PM MDT, and the lowest projected maximum is 7.3 in Fort Collins at 12:00 PM MDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

64 Counties in Colorado (CO)

Average Maximum UV Index Today
  • Adams County - 7.8
  • Arapahoe County - 8.1
  • Boulder County - 7.9
  • Denver County - 7.8
  • Douglas County - 8.3
  • El Paso County - 8.6
  • Jefferson County - 8
  • Larimer County - 7.7
  • Weld County - 7.6
Data Source: National Oceanic and Atmospheric Administration (NOAA)

286 Places in Colorado (CO)

Maximum UV Index Today
  • Aurora - 8
  • Colorado Springs - 8.8
  • Denver - 7.7
Data Source: National Oceanic and Atmospheric Administration (NOAA)