The temperatures quoted are for pre-monsoon ascents, April to mid June.
Post-monsoon (September to November) temperatures are likely to be a little lower and will fall further in December with the onset of Himalayan winter.
In other areas beyond reach of the monsoon (Karakoram, Pamirs, etc.) climbing may continue through the summer.
Wind chill rating: Medium
Gear Notes
Support may be provided to Base Camp, but you will be carrying your own gear higher up.