Hampta Pass temperature

Weather across two valleys

Hampta Pass crosses from the wetter, greener Kullu Valley into Lahaul's colder rain-shadow landscape. Conditions can feel very different within one trekking day, and cloud, wind or showers can arrive quickly at altitude.

Month by month

June often brings lingering snow near the pass. July and August are usually greener with a higher chance of rain on the Manali side. September commonly has cooler nights and clearer spells, but none of these patterns is guaranteed. Which pattern suits you decides the best time for the Hampta Pass Trek; June and July and August each have their own detailed guide.

• June: snow patches, cool nights and a newly opened trail
• July: lush valleys, waterfalls and possible monsoon rain
• August: green terrain, active streams and variable cloud
• September: colder camps, shorter days and often clearer views

Temperature and wind

Daytime walking can feel mild in sunshine, while exposed sections become cold quickly when wind or cloud builds. Night temperatures at higher camps may approach freezing. Carry layers rather than relying on one heavy garment, and use the Hampta Pass packing list to plan them.

Forecasts are planning tools

A Manali forecast does not represent conditions at the pass. Check a current mountain forecast close to departure and follow the on-ground trek leader's judgement when conditions change.

Why the two sides differ so sharply

The Pir Panjal range blocks most monsoon cloud from reaching Lahaul. On the Manali side of the Hampta Pass Trek you may walk through drizzle and thick forest humidity, then descend to Shea Goru the next day into dry, dusty, wind-scoured terrain. Pack for both climates in the same rucksack.

• Kullu side: humid, green, rain-prone, slippery rock
• Pass saddle: wind, fast cloud build-up, possible snow
• Lahaul side: dry, cold, strong sun, sharp night chill
• River volume rises through the afternoon on warm days

How weather changes the trekking day

Teams usually start the pass day very early because wind and cloud tend to build after late morning, and because afternoon snowmelt raises the stream crossings on the descent. A weather delay does not usually cancel the trek. Leaders commonly shift the schedule by a few hours or hold at Balu ka Ghera until the crossing is safe.

Reading a forecast you can actually use

Manali town sits near 6,700 ft, while the pass itself is near 14,100 ft, so a town forecast typically understates cold and wind by a wide margin. There is no single authoritative live weather feed for the pass itself. Look at a mountain point forecast for roughly 4,000 m, check freezing level and wind speed rather than only rain probability, and treat anything more than three days out as a trend rather than a plan.

When monsoon weather disrupts departures

Himachal's monsoon months occasionally bring more than a single wet day. In some recent seasons, heavy rain and landslides in the Kullu-Manali region have led established operators to postpone or cancel scheduled Hampta Pass departures entirely, rather than risk an unsafe crossing or a blocked approach road. If your dates fall in July or August, ask your operator what their written weather contingency and refund policy is before you pay, and keep your onward travel from Manali changeable.

What to do if the weather turns

Add layers before you feel cold, keep rain gear at the top of your pack, and keep one dry set of clothes sealed for camp. Report shivering, headache or unusual fatigue early. Every route decision on the pass day belongs to the on-ground trek leader.