Short answer: come between mid-June and mid-September if you want to walk. Early September is our own favourite month. The road is open longer than the trekking season is comfortable, and the winter is a different trip altogether.
The season in one table
| Month | Day / night | Roads | Trekking | Notes |
|---|---|---|---|---|
| January – March | Well below freezing | Closed | Winter routes only | The Zanskar gorge freezes; villages are reached on foot or by air-dropped supplies. |
| April – May | Cold, thawing | Usually still closed | No | Snow on the passes, rivers rising fast and unpredictably. The hardest month to plan. |
| June | Warm days, cold nights | Opening, variable | From mid-month | Green valleys, high water. Early June crossings can be forced onto detours. |
| July | Warmest | Open | Yes | Peak melt, so the biggest rivers. Barley fields at their greenest. Most other visitors. |
| August | Warm | Open | Yes | Occasional monsoon spill over the Himalaya: short, heavy rain, and rockfall risk on some slopes. |
| September | Cool, very clear | Open | Best | Rivers drop, air is clearest, harvest in the villages. Nights get cold quickly after mid-month. |
| October | Cold nights | Closing | Early October only | Beautiful and empty, but the first snow can shut a pass with no warning. |
| November – December | Deep cold | Closed | No | The valley closes in. Not a season for visitors on foot. |
Temperatures vary enormously with altitude and with sun. A July afternoon at 3,700 m can be shirtsleeves; the same night at 4,600 m will be at or below freezing.
What actually changes through the season
June — green, wet underfoot, unpredictable
The valley is at its greenest and least visited, but the rivers are running with meltwater from the whole winter's snow. On our routes this decides everything: some crossings that are trivial in September are simply not on in mid-June, and the day gets rerouted. If you come this early, come with a flexible itinerary and a guide who will change it.
July and August — warm, busy by Zanskar standards, high water
This is when most people come and when the weather is most reliably warm. It is also peak melt. We start early — often walking by six — because rivers are lowest in the morning and rise through the afternoon. In August the monsoon occasionally pushes over the Great Himalaya and gives a day or two of real rain, which matters less for comfort than for what it does to loose slopes.
September — the month we would choose
Rivers drop. The light gets very clean. Villages are harvesting barley, so the valley is at its most active and its most sociable. The trade-off is temperature: after about the 15th, nights at camp go properly cold, and you want a sleeping bag rated to around −10 °C rather than −5 °C.
Winter — a different trip
Winter in Zanskar is not a colder version of summer. Roads close, the valley lives on stored food and what comes in by air, and the frozen river becomes a route. It is possible to travel here in winter, but it needs different equipment, different planning and a different conversation. Do we offer a winter programme, and if so which one? Until that is decided this paragraph should not promise anything.
Festivals and timing
Monastery festivals follow the Tibetan lunar calendar, so they move from year to year in the Western calendar. If a festival is the reason for your trip, tell us early and we will build the route around the date once it is fixed. See festivals in Zanskar.
One planning rule. Whatever month you choose, add two nights in Leh at the beginning. Not for sightseeing — for altitude. Everything else on this page matters less than that. Why acclimatisation comes first.