Hello, I lived in Flag and CO (front range) and spent time outdoors during summers. They are similar in afternoon weather moods, so the mentions of afternoon storms are useful. Also the temp swings can be quite dramatic in CO, in the Mtns and the plains. But point I would emphasize is be aware of lightning aspect in CO. I lived at about 8k feet near Pikes Peak HWY.
Every summer it seemed there were tourist lightning strikes on Pikes Peak. It seemed always to be hikers descending in mid afternoon to late afternoon hours. One buddy who was a camp guide during summers always said something like “up at dawn, zoom by noon” . I think May and July are the wettest months, not sure about lightning, but seemed like July my little mtn. apartment was always reverberating during July during the afternoons. Gorgeous summers in the CO. Mtn areas, have fun.