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Summer clothes as it will be hot, except if you go into mountain areas, then you need a jacket and long sleeves/pants.

It will be hot--80s,90s maybe even 100, so bring shorts and Tshirts. It does cool off a little at night, into the 60s or 70s, maybe a little cooler if you're in the mountains. In Colorado, layers are always good, because the weather is pretty unpredictable. I'd be prepared for warm weather, but probably also bring jeans and a jacket.

Mostly, it's going to be hot...80s, 90s during the day, cooling off at night. Not too humid, but occasional afternoon thunderstorms can be a problem. You're still in the foothills of the Rockies, so occasional cool days and cold nights are not impossible. But, mostly, I'd plan on hot days, comfortable nights.

Hi,,, take t shirts and a couple nice shirts and.... a good long sleve to wear at night.... plenty of bug spray if you are going up in the mnts..... you will not regret it....

Have fun...

its burning here now, bring t-shirts and shorts or youll burn up