We rode thru Yellowstone ten days ago and stayed the night about eight miles west of the park. Temps were high 30s to mid-70s. The Beartooth has already shut down because of snow once this season. It reopened but predicting the weather up there is a crap shoot. Not sure what you mean by the Bighorn area. The battlefield?
You will be better off checking one of the weather websites for a weather forecast than relying on week/day old reports.
Bighorn Mountains east of Yellowstone between Greybull and Ranchester. Great ride. Thanks for the info. I have been watching weather forecasts and am looking to buy my wife a heated jacket liner!