Hey all, I am a newbie, that has done a few overnighters, but am going to be going to the Sierras for 5 days (camping at 10,000 ft to 11000 feet) and maybe a dayhike to Mt. Langley beginning July 8th. I am wondering how many layers and such I should bring, I am trying to minimize my pack weight and don't know what I should bring and leave behind... Anyone know of average temps in July? I know weather is constantly changing, but any averages would be great...

I am thinking of bringing:

short sleeve Salomon breathable Poly SS shirt.
Capilene 3 Long Sleeve Poly Shirt
REI Heavyweight 1/4 zip fleece
Mtn. Hardware Synchro softshell
Merrell Rain shell (no insulation)

* I also have an LL Bean down vest and LL Bean down coat (both are 650 down fill I think)I coud bring in lieu of the rei heavyweight fleece or synchro jacket.*

Any suggestions or help would be appreciated...
TIA