Mardi Himal Weather: Month-by-Month Guide

The Short Answer

The best windows are mid-October to early December and March to early May. Within those, late October to November is the strongest period on this particular trek, because post-monsoon air is dry and the ridge holds clear mornings for longer.

Mardi is also one of the more winter-friendly treks in the Annapurna region. There is no pass to close, altitudes are modest by Nepal standards, and the trail is short. December and even January are viable with warm gear, provided you accept snow on the ridge above High Camp and possible lodge closures at the top.

Temperatures Along the Ridge

Typical ranges in the main trekking seasons. Winter nights run roughly 6 to 10 °C colder at every camp.

High Camp is where people are caught out. It sits on a bare ridge with nothing to break the wind, so the felt temperature is consistently lower than the number suggests, and lodge rooms there are unheated plywood. A sleeping bag rated to about -10 °C is right for the main seasons even though the air temperature rarely justifies it on paper.

The Ridge Cloud Cycle: Why Mornings Decide Everything

This is the single most useful thing to understand about Mardi Himal weather, and it applies in every month including peak season.

The Mardi ridge runs south from the Annapurna massif into the warm, humid Pokhara valley. Through the day, warm air rises from the valley, hits the ridge and condenses. The practical result is a reliable daily rhythm:

• Dawn to about 9 am: usually clear, often spectacularly so. Machhapuchhre is sharp and close, and the whole Annapurna wall is visible from Low Camp upward.
• 9 am to noon: cloud starts building from below, first filling the valleys, then rising past the ridge.
• Afternoon: frequently a whiteout on the upper ridge, even on days that began flawless. Trekkers who walk from Low Camp to High Camp after a leisurely breakfast routinely arrive in cloud and conclude the trek has no views.
• Late afternoon and sunset: the cloud often drops back down or breaks up, giving a second window.

Three consequences for planning:

• Start walking early every single day, not just on the Base Camp morning. On a ridge trek, a 6.30 am start is worth more than any gear you can buy.
• Do the Base Camp push pre-dawn. Leaving High Camp at 4 to 5 am is not only about sunrise light — it is the difference between seeing the amphitheatre and standing in fog.
• Do not judge the trek by an afternoon. If you arrive at High Camp in cloud, go to bed early rather than despairing. The morning is usually a different trek entirely.

Month-by-Month Breakdown

January — cold, quiet, snow on the crest

The coldest month, with snow on the ridge above Low Camp in most years and reliably above High Camp. The trek is doable with proper gear and the trails are almost empty, but the final ridge to Base Camp is often impassable or unwise for trekkers without winter experience, and some High Camp lodges close. Turning around at View Point is common and sensible. Views on clear January mornings are as sharp as any month.

February — improving, still wintry up high

Milder than January with snow retreating slowly. Lower forest is pleasant; High Camp remains cold. A good month for solitude, and the ridge above View Point becomes progressively more feasible through the month. Ice on the exposed crest is the main constraint.

March — spring arrives, rhododendrons start

A genuinely good month. The forest between Pothana and Low Camp begins to bloom, days warm up quickly, and residual snow above High Camp clears through the month. Air is still relatively dry so mornings stay clear longer than in April. One of the more underrated windows on this trek.

April — peak spring, best forest

Rhododendrons at their fullest through the mossy forest section, warm walking temperatures, and a comfortable Base Camp morning. The trade-off is haze: pre-monsoon moisture builds through the month and cloud arrives earlier in the day than in autumn. Still one of the two busiest months, so book High Camp ahead.

May — warm, hazy, unsettled

Comfortable temperatures even at High Camp, but the cloud cycle tightens sharply. By mid-May you may get clear views only in the first hour after dawn, and afternoon thunderstorms on an exposed ridge are genuinely unpleasant and occasionally dangerous. The first ten days are usable; after that, the ridge is not where you want to be.

June to mid-September — monsoon

The weakest season for this trek specifically. Leeches in the forest section, mud on the steep Sidhing descent, and the ridge in cloud for days at a time. The final crest to Base Camp is genuinely risky when wet. The forest is beautiful and lodges are empty, and a few trekkers come for exactly that, but the mountain views that justify the ridge are largely absent.

Late September to October — the season opens

The monsoon typically withdraws in the last week of September, and the first clear post-monsoon mornings are the sharpest of the year. Early October can still see residual cloud; from mid-October conditions stabilise and this becomes prime time. Lodges busy from mid-month.

November — the best month on this trek

Dry post-monsoon air means the morning clear window lasts longer than in any other month, sometimes until early afternoon. Cold but manageable nights at High Camp, excellent visibility, and trekker numbers dropping after the first week. If you can choose freely, choose November.

December — cold, clear, emptying out

Early December continues November's excellent visibility with colder nights. The first significant ridge snow usually arrives mid-month, after which the Base Camp push depends on conditions. Lodges start closing at High Camp. A fine choice for the first half of the month.

What the Weather Means for Your Gear

Mardi's altitude profile suggests it needs less than it does, because the exposure is unusual for the height.

• A windproof shell is the highest-value item on this trek, more so than a heavy insulating layer. The ridge above Low Camp has no shelter of any kind.
• Sleeping bag to about -10 °C for the main seasons, -15 °C for December to February. High Camp lodge rooms are unheated and thin-walled; blankets are available but limited in peak season.
• Microspikes from December to March if you intend to go above View Point. Cheap, light, and the difference between attempting the final crest and not.
• Two trekking poles for the exposed crest and, just as importantly, the steep Sidhing descent, which drops over 1,200 m in three to four hours.
• Rain gear year-round, and a pack cover. Even in November, the ridge can catch an afternoon shower off the valley.
• Sun protection above Low Camp. The ridge is open, the sun is fierce and there is no tree cover from about 3,000 m up. Sunburn is far more common on this trek than cold injury.

The full list is in the Mardi Himal packing list, and how the seasons affect crowding and cost is covered in the best time to trek guide.