Autumn : Sep-Nov

This is the time when you can expect better visibility, the air is fresh, and the weather is perfect and that the Nepalese most important festivals (Dashain and Tihar) are marked during this season The best season offering excellent weather and tantalizing mountain views as it is normally dry, stable and very clear. Temperatures are usually moderate making it a good time for any trek. It can be colder at night higher spots, but not as cold as the winter months (December-January). At low elevations it may still be hot during the day.

Winter : December–February

Winter is usually dry and much colder and is noted for occasional snowfalls in regions as low as 2500m or more. It may be difficult to reach some of the higher passes (4000m+) due to snow & ice making it ideal for trekking at lower elevations, generally below 3000 meters. The high-altitude treks in this season require good gear and experience in cold-weather conditions as temperatures at 5000m can drop below -20°C with heavy snow fall.

Spring : March-May

Spring sees the return of warmer weather in the mountains with also more possibility of rain. Trekking in spring is particularly lovely as the mountain slopes are covered with blooming rhododendrons of beautiful and colorful flowers and still have plenty of high snow to enhance your photos. The temperature is quite moderate and the mountain views are excellent which may only be limited in the higher routes of plus 4000m.

Pre-Monsoon : May - Mid June

It gets that much hotter, hazier and unsettled in May & early June. The warming Asian landmass begins to draw up air from the south ushering the pre-monsoon – a season of erratic weather and increasingly frequent afternoon storms. If you are looking for solitude on your trek, this is a good time to go. It is also a good time for going high but be prepared for rain, especially in the traditionally wet areas of Annapurna and eastern Nepal.

Monsoon : Mid-June to August

Few foreigners trek during this period because of the rain, mud, leeches, travel difficulties caused by landslides and general lack of mountain views. However, some treks in Nepal’s at far west are sheltered from the impact of monsoon. And even in wet areas, mornings are often clear, and wild flowers and butterflies can be seen in abundance.