Oct is a good time to visit Kheerganga as it will be pleasant and you won't face much problem while trekking. Don't make it later than Oct because November is quite cold there. Carry your woolens as it will be cold at night.
Hey Himanshu,
October is one of the best time to visit the scenic Parvati Valley. Weather will be pleasant during Autumn season. Going to Kheerganga? Keep the place clean and maintain its dignity. You can even go to Tosh, Pulga, Challal for some offbeat experience.
Yeah you can visit it in the month of October just check weather forecast before doing this trek.. Avoid doing it during rain it will be quite risky then..
Good wheather and you can find the waterfall there and the hot water too in cold wheather. Naturally occurred hot water. Nice place for camping I have visited there 2 times in Oct also.