When to Trek
Although treks in Nepal can be organized throughout the year, October through May is considered good for trekking. The monsoon begins in mid-June and ends around mid-September making travel wet and warm. The mountain views may not be at their best as rain clouds and haze obscure the enchanting views. Itâ€™s a great time for botanists, however as the higher valleys and meadows come alive with blossoming flowers and lush vegetation. Monsoons donâ€™t mean rain all the time. Besides, some of the most frequented trails will be less crowded and you may prefer a quieter time in the mountains. The upper parts of the Annapurna circuit around Marpha, Jomsom and Muktinath fall in the rain shadow area and are perfect for trekking during the monsoon. Note: Insect repellent should be carried when trekking during the summer months.
Autumn being the best season for trekking, excellent weather and spectacular mountain views greet trekkers as they hike up. January and February are noted for cold weather with occasional snowfall at higher elevations. Some routes may be blocked by snowfall, But views are excellent.
Spring arrives in late February in Nepal and itâ€™s the ideal time for those who are interested in flowers, birds and the splendors of nature. Many varieties of wild flowers, especially rhododendrons turn the hillside into a colorful paradise.
April and May are the expedition season and the best time for mountain climbing. It is mildly warm at lower elevations but occasional haze may obscure the view of mountains. At higher elevations over 4,000 meters, the mountain views are excellent and temperatures are quite moderate even at night.