Hot but not the kind of hot you're used to, no humidity. It was 100 yesterday here in Denver. We slept with the windows open last night and have not turned on the swamp cooler today.

I rode my bike yesterday, went out about 11:00 for 1.5 hrs. The climb back to the house was a little warm, but not miserable

100 degrees without humidity feels like 90 degrees. Of course, Estes Park is higher elevation so it is cooler.

My friend who lives in Silverthorne cuts grass at Keystone Golf course and he says that in the mornings this time of year there is often frost on the grass.

Colorado is like anywhere else, it can get cold in the summer. Two weeks ago, the weekend of the Triple Bypass, it was rainy and in the 60's here in Denver. Riders on the Triple Bypass bailed, not because of the rain, but because of the cold and danger of hypothermia.

We're in the monsoon season, not sure how long it lasts, so it can be sunny and beautiful in the mornings and rain showers in the afternoon.

Be prepared for cold and hot. There are stores in Estes Park so you can buy whatever you need if you forget somethng. That's how they make their money, tourists forget to bring essentials (warm clothes) so they have to buy them.

I made that mistake myself in June, it was hot here so I took only shorts to Summit County, it was in the 60's and 30"s at night. Fortunately, I had left a pair of long pants and a long sleeved shirt in the condo, so I got by.