Late June through mid-August for summer activities; late September for elk rut and fall foliage. Summer offers the best conditions for Trail Ridge Road (America's highest continuous paved highway), hiking, and wildlife. Fall (late September) brings the dramatic elk rut during Elk Fest, golden aspen foliage, and fewer crowds than peak summer
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 34 | 14 | crisp & mostly dry |
| Feb | 34 | 14 | crisp & changeable |
| Mar | 42 | 19 | crisp & changeable |
| Apr | 48 | 25 | cool & changeable |
| May | 58 | 34 | cool & wet |
| Jun | 72 | 45 | mild & wet |
| Jul | 76 | 51 | warm & wet |
| Aug | 74 | 50 | warm & wet |
| Sep | 69 | 44 | mild & changeable |
| Oct | 55 | 32 | cool & changeable |
| Nov | 43 | 22 | crisp & mostly dry |
| Dec | 33 | 14 | crisp & mostly dry |