Know the seasons
Spring and autumn are popular trekking seasons. Winter is cold and monsoon brings rain, so waterproofs and a flexible schedule matter.
Expect a daily pattern
Mornings are often clearer, with cloud and wind building later. Start early when conditions allow.
Pack for the cold
Temperatures drop as you climb. Pack for conditions well below those in Kathmandu.
Keep rain gear handy
Store your waterproof jacket where you can reach it quickly. A pack liner protects spare clothes and sleeping gear.
Respect altitude
Ascend gradually and include rest days. If altitude sickness symptoms appear, do not ascend further; seek qualified advice and descend if symptoms worsen.
Use forecasts as guidance, not guarantees
Mountain forecasts can be uncertain, particularly in remote valleys and near high passes. Check conditions shortly before departure and ask local guides about what they are seeing on the trail. Start with enough flexibility to wait out unsafe weather or change the itinerary. Do not continue onto exposed terrain simply because it was on the original plan.
Protect equipment from prolonged wet weather
Use a pack liner or dry bags for sleeping gear, spare clothes and electronics. Store rainwear where you can reach it quickly. In cold weather, keep spare gloves and socks dry; wet insulation can lose much of its usefulness. Wind can make temperatures feel much colder, especially on ridges and passes.
Recognise when to stop
Headache, nausea, dizziness and unusual fatigue can be signs of altitude illness, although symptoms have other possible causes. Tell your guide or companions early. Do not ascend further if altitude illness is suspected, and seek qualified medical advice; severe or worsening symptoms require urgent help and descent. Weather and altitude safety decisions should take priority over the schedule.