The forecast for the Inner Canyon (Phantom Ranch) is as follows:

Continued windy conditions throughout the week with winds gusting to 30 mph.
Days will be mostly sunny with temps in the low to mid-90's (increasing throughout the week).
Nights will be mostly clear with temps in the low to high 40's (increasing throughout the week).

Temps are getting hotter - make sure you carry a minimum of one quart of water for every hour you plan to hike. Mix in sport drinks with electrolytes and eat salty snacks too!