This link will take you to views of our national parks. Its actual purpose is to show the air quality.
Some parks, like Yellowstone, are so large the weather varies within it. Lake Yellowstone is a couple thousand feet higher than Old Faithful, and always cooler.
Climate Friendly Parks link will help you plan a trip according to weather and has information on what we can do to help along with learning opportunities.
I found the http://www.nps.gov/ website has a lot of good information on it. There are ranger podcasts, upcoming events, search for a park, news and events.
We have a lot of really beautiful National Parks which should be protected, enjoyed and passed on to our children. I've worked in two, cooking at fancy lodges. My most memorable times were spent in the back country, viewing animals, hiking trails.
From desert, to oceans, mountains, canyons, rivers, or glaciers, there's something for everyone to enjoy.