Best Time to Trek Everest Base Camp: Month-by-Month

The Two Best Seasons

EBC can be trekked outside the monsoon, but two windows stand out for clear skies, stable weather, and reliable Lukla flights. The wrong season does not just spoil the views, it grounds the flight that gets you to and from the trailhead.

Month-by-Month

Late September to October

The single best window. Post-monsoon air is washed clean, giving the year's sharpest mountain views, with comfortable daytime temperatures and cold but clear nights. Also the busiest: book lodges and flights ahead and expect company at the Kala Patthar sunrise.

November

Still superb and slightly quieter as the month progresses. Crystal skies and stable Lukla flights, but the cold builds steadily, nights at Gorak Shep are well below freezing, and late November sees the first hard cold snaps.

December to February

Cold and quiet, with often beautifully clear skies. Lower stages near Lukla and Namche are pleasant by day, but Lobuche, Gorak Shep and Kala Patthar are a deep freeze, some high teahouses close, and snow can block the trail. Trekkable for the well-prepared and well-insulated, ideally with a guide who reads conditions.

March to April

Spring's headline act. Rhododendron forests lower down burst into bloom, days grow warmer, and this is the Everest climbing season, so base camp itself comes alive with expedition tents, a sight in its own right. Excellent views early in the day.

May

Warm low down with afternoon cloud and haze building as pre-monsoon heat rises. Good for spring colour and the busy base camp, but mountain views are usually best at dawn before the haze.

June to August (Monsoon)

Heavy rain makes lower trails muddy and leech-prone, cloud hides the peaks, and, crucially, Lukla flights are frequently grounded by weather. Best avoided unless you have lots of buffer time and low expectations of views.

The Lukla Flight & Weather Windows

The defining seasonal factor on EBC is not avalanche risk but the weather-dependent Lukla flight. Lukla airport has a short, steep runway in a deep valley and no instrument landing, so flights only operate in clear conditions and are frequently delayed or cancelled, sometimes for a day or more.

• Fly early in the day, morning flights have the best weather window before cloud builds.
• Build in buffer days, at least one or two, so a grounded flight does not cost you your flight home, see the itinerary guide.
• In peak season, flights often shift to Manthali (Ramechhap), a 4–5 hour drive from Kathmandu, to ease congestion.
• A helicopter transfer is a pricier fallback if you are stuck for days.

More on staying safe at altitude in the EBC altitude sickness guide.

Festivals & Timing Tips

• Dashain & Tihar (Oct–Nov): Nepal's biggest festivals fall in peak season. Trails, lodges and flights are busy and some staff travel home, so book early.
• Mani Rimdu (Oct–Nov): the colourful masked-dance festival at Tengboche Monastery is a Khumbu highlight if your dates align.
• For fewer crowds with great weather: aim for late September or late November in autumn, and early March or late May in spring.
• Start early each day year-round, the Khumbu peaks are clearest at dawn before cloud and haze build.