Normally Sept 1st is late monsoons, you can travel safely.. but this year monsoons aren't regular..so take a look about weather forecast and then book your tickets..and if you have options then make your trip during October or late September..
Be a Responsible Traveller 👍
The best time for the Khirganga Trek is from May to June and September to October. So, you may plan your trek in any of these seasons. You will find a large number of spots for camping during the Kheerganga Trek route.