Wooo, do i feel stupid. Granby is run by my neighbour. I never realized what the business was actually called.
Our last two springs have been cooler and damp a little longer, but have suddenly become warm and dry quickly. You'll be hunting from 3900 to about 65oo feet in elevation, depending on the snowpack (which is low this year).
I don't do F but look for anywhere from 0 to -2C overnight and plus 5 to plus 15C during the days. Weather changes valley to valley, and Barry has a large territory.Terrain varies, but good hiking type boots are a must. Enjoy your time here, and if you flyfish, throw in your five weight.