UV Index Today in Colorado (CO)

Tuesday, October 13, 2026 -8:13 PM MDT (GMT-6)

The average maximum UV Index today across 286 locations in Colorado (CO), is 5.2. The highest projected maximum is 6.8 in Sanford at 1:00 PM MDT, while the lowest projected maximum is 0.8 in Rangely at 10:00 AM MDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 1.5. The highest projected maximum is 5.7 in Alamosa at 1:00 PM MDT, and the lowest projected maximum is 0.3 in Boulder 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 - 5.2
  • Arapahoe County - 5.4
  • Boulder County - 4.3
  • Denver County - 5
  • Douglas County - 5.7
  • El Paso County - 6.1
  • Jefferson County - 5
  • Larimer County - 5
  • Weld County - 5.1
Data Source: National Oceanic and Atmospheric Administration (NOAA)

286 Places in Colorado (CO)

Maximum UV Index Today
  • Aurora - 5.5
  • Colorado Springs - 6.1
  • Denver - 4.9
Data Source: National Oceanic and Atmospheric Administration (NOAA)