The best time to visit Ladakh is from May to September
Ladakh is situated at a high altitude, higher than most other areas in the Himalayas. Its home is the Trans Himalaya; the other side of the highest mountain range on earth. Its location prevents almost all rain clouds from reaching the area, and Ladakh combines a desert and a mountain climate.
It is usually very sunny (high UV intensity and danger of sunburn) and the air is very dry (you evaporate 2-4 liters of moisture a day without visible perspiration!). And there are big differences between day and night. On a high pass just a T-shirt may suffice as long as you are in the sun, while you will need a down jacket to be comfortable in the shade.
Having said that, Ladakh’s summers are generally very pleasant with daytime temperatures of over 20 degrees C. In spring (May) and Autumn (October), temperature differences between day and night are larger and cloudy days can be quite chilly. And, although Ladakh is a desert: rain can occur.
Best time to visit Ladakh
The best months for visiting Ladakh are May through September. For doing high altitude treks, however, it is better to wait until July, as passes may be blocked by deep snow before that. In most years Ladakh can be reached by road from mid-May, by air all year round.