◐ Shoulder season — possible with care

Green Lake Trek in September

Weather, temperatures, packing and honest advice — from the team that runs this trail.

The quick answer

September is a shoulder month for Green Lake. The core season is Apr, May, Oct, Nov, so conditions can work with the right preparation — but check with our team about your specific dates. The trek runs 11 days from Lachen, North Sikkim, reaching 16,000 ft at its highest point, and is graded Difficult (5/5). The fee is ₹34,999 + 5% GST with permits, meals, camping and certified trek leaders included.

Why this window works: September sits at the edge of this window, so conditions vary year to year — check with our team for your dates.

Weather & trail conditions in September

The monsoon washes the sky clean, leaving the sharpest mountain views of the year. Trails are dry, rivers settle down, and nights get progressively colder as winter approaches. On Green Lake, expect daytime temperatures around 13°C on the trail and roughly -1°C at the highest camps after dark in September.

September in the Himalayas

Daytime

~13°C

Night at camp

~-1°C

Highest point

16,000 ft

Grade

Difficult

What to pack for September

✓ Layered warm wear — October nights differ hugely from September's
✓ A padded jacket for camps above 10,000 ft
✓ High-ankle trekking shoes for dry, rocky trails
✓ A good camera — this is the season of clear summit views

Don't own the gear? Rent shoes, jackets and more on our rentals page — sanitised after every trek.

Booking notes for September

Post-monsoon season opens — photographers book these batches months out. The best months for Green Lake are Apr, May, Oct, Nov.

Frequently asked

Is September a good time for the Green Lake trek?

September is a shoulder month for Green Lake. The core season is Apr, May, Oct, Nov, so conditions can work with the right preparation — but check with our team about your specific dates.

How cold is Green Lake in September?

Plan for daytime temperatures around 13°C and nights near -1°C at the higher camps. Our sleeping bags are rated for well below these temperatures.

Can beginners do Green Lake in September?

Green Lake is graded Difficult (5/5), so we recommend at least one prior Himalayan trek. Beginners should start with Nag Tibba, Dayara Bugyal or Kedarkantha instead.