UV Index Today in Colorado (CO)

Saturday, August 8, 2026 -9:52 AM MDT (GMT-6)

The average maximum UV Index today across 286 locations in Colorado (CO), is 8.7. The highest projected maximum is 10.3 in San Luis at 1:00 PM MDT, while the lowest projected maximum is 6.3 in Lake City at 12:00 PM MDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 7.7. The highest projected maximum is 9.4 in Fraser at 1:00 PM MDT, and the lowest projected maximum is 4.6 in Lake City 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 - 8.9
  • Arapahoe County - 9
  • Boulder County - 8.3
  • Denver County - 8.9
  • Douglas County - 9
  • El Paso County - 8.7
  • Jefferson County - 8.4
  • Larimer County - 8.3
  • Weld County - 8.5
Data Source: National Oceanic and Atmospheric Administration (NOAA)

286 Places in Colorado (CO)

Maximum UV Index Today
  • Aurora - 9.2
  • Colorado Springs - 8.6
  • Denver - 9
Data Source: National Oceanic and Atmospheric Administration (NOAA)