All of the other posts are right on. I have driven this route at least 14 times so here is a little extra.
Last summer most of the state of Wyoming was closed by a blizzard in May! We started driving throughout the west on May 1st and drove through two snow storms (not blizzards).
Wind in Wyoming can be horrific, there are electronic warning signs between Casper and Cheyenne. Over 60 mph wait it out. I usually slow down to 55 mph in windy conditions.
Traffic between Ft Collins and downtown Denver is usually "bad". I just stay in the second lane from the right and move with the semi-trucks.
I usually bypass Denver on the west I25-I76-I70-Colo 470-I25. Last time at 9 o'clock I only had to brake for traffic three times.
Raton pass is the only pass on the route but no big deal.
Last October through Santa Fe there were 55 mph winds. I live in New Mexico and we joke about a 50 mph "breeze".
Also check gas prices at "(state) gas prices dot com", New Mexico is the cheapest right now and Albuquerque is really cheap ($1.56 unleaded).
May fair winds always be at your back and safe travels.