Seasons in Nepal: Weather by Month & Best Time to Visit

Nepal has 4 seasons: spring (March–May), monsoon (June–September), autumn (October–November), and winter (December–February). Temperatures range from 30°C in the Terai lowlands to -20°C or below in the high Himalayas. The best trekking season is October to November, with clear mountain views and comfortable temperatures.

Introduction

Nepal's dramatic elevation range — from 60 meters to 8,849 meters — creates climate zones from tropical to arctic within a small geographic area. Altitude is the primary determinant of temperature, while the monsoon drives rainfall patterns.

Spring (March–May)

• Temperature: 15–30°C in Kathmandu, cooler at altitude
• Key Event: Rhododendron blooms, second-best trekking season

Spring is Nepal's second-best trekking season, with rhododendron forests bursting into spectacular red, pink, and white blooms across the middle hills (2,000–4,000 meters). Temperatures warm steadily, though visibility is not as clear as autumn due to haze and pre-monsoon buildup.

Mount Everest expeditions depart for base camp in March with summit attempts typically in May. The Annapurna and Everest Base Camp treks are popular, though increasing afternoon clouds can obscure mountain views by April.

Monsoon (June–September)

• Temperature: 25–30°C in Kathmandu, high humidity
• Rainfall: Heavy — 300–500 mm/month in Kathmandu Valley
• Key Event: Lush green landscapes, leeches on trails, fewer tourists

Nepal's monsoon brings 80% of the annual rainfall, with heavy daily rains from June to September. Trekking is challenging due to leeches, slippery trails, landslides, and obscured mountain views. However, the rain-shadow regions of Upper Mustang and Dolpo remain relatively dry.

The landscape is at its most lush and green, and Hindu festivals like Dashain and Tihar occur toward the monsoon's end. This is the cheapest time to visit, with dramatically lower prices and almost no foreign tourists.

Autumn (October–November)

• Temperature: 10–25°C in Kathmandu, crisp and clear
• Rainfall: Minimal after monsoon ends
• Key Event: Peak trekking season, Dashain/Tihar festivals, clearest views

Autumn is Nepal's absolute peak season, with clear blue skies, comfortable temperatures, and the clearest Himalayan views of the year. The monsoon's moisture has washed the air clean, and the mountain panoramas from Everest Base Camp, Annapurna Circuit, and Langtang are at their most spectacular.

October and November are the busiest months on popular treks — book teahouse accommodation in advance for the Everest and Annapurna regions. Dashain (Nepal's largest festival) and Tihar (festival of lights) bring colorful celebrations throughout the country.

Winter (December–February)

• Temperature: 2–18°C in Kathmandu, well below -20°C above 5,000m
• Key Event: Clear skies, cold nights, low-altitude trekking

Winter offers clear skies and excellent mountain views at lower altitudes, but high-altitude passes (above 5,000 meters) are often closed by snow. Lower-elevation treks like the Ghorepani Poon Hill trek and Chitwan National Park wildlife viewing are excellent winter options.

Kathmandu Valley is pleasant during the day (12–18°C) but cold at night (2°C). The Terai lowlands (Chitwan, Lumbini) enjoy warm, comfortable winter weather ideal for jungle safaris and cultural visits.

Best Time to Visit

• Trekking: October–November (best), March–May (2nd best)
• Wildlife Safari: October–March
• Kathmandu Valley: September–November, March–May
• Budget Travel: June–September (monsoon)

For trekking, October–November is unmatched. For wildlife in Chitwan or Bardia, the dry season (October–March) concentrates animals at water sources. For cultural exploration in the Kathmandu Valley, any month outside the monsoon works well.

What to Pack

Trekking: Layers are essential (temperatures change dramatically with altitude). Pack a warm down jacket, thermal base layers, waterproof outer shell, sturdy trekking boots, sleeping bag liner, and sun protection. Kathmandu: Light layers, comfortable walking shoes, and modest clothing for temple visits. Monsoon: Waterproof everything — pack, clothing, and electronics protection.

Key Facts

• Nepal's elevation ranges from 60 m to 8,849 m — tropical to Arctic.
• October–November offers the clearest Himalayan views of the year.
• The monsoon brings 80% of Nepal's annual rainfall in 4 months.
• Upper Mustang is a rain-shadow area trekable even during monsoon.
• Dashain is Nepal's biggest festival, lasting 15 days in October.

Fun Facts

• Nepal's flag is the only national flag that is not rectangular — it consists of two stacked triangles.
• The view of the Himalayan range from a domestic flight window in Nepal is considered one of the most spectacular aerial panoramas in the world.
• Namche Bazaar, the gateway to Everest, has a Saturday market where Sherpa traders still barter goods as they have for centuries.

Final Thoughts

Nepal's trekking seasons are the key to a great Himalayan experience. Autumn offers perfection for mountain views, spring brings rhododendron beauty, and even the monsoon has its rewards for adventurous travelers willing to brave the rain.