Sikkim’s weather changes dramatically across seasons due to its Himalayan terrain. From snow-covered winters to lush green monsoons and crystal-clear spring skies, each month offers a unique travel experience. Understanding the weather in Sikkim helps travelers plan sightseeing, permits, road travel, and activities more effectively.
This Sikkim weather guide explains month-wise climate conditions, temperature ranges, rainfall patterns, and travel suitability so you can choose the right season based on comfort, scenery, and experiences.
Spring Weather in Sikkim (March to May)
Spring is one of the most pleasant seasons in Sikkim. Temperatures range between 10°C to 25°C, with blooming rhododendrons, clear skies, and comfortable days.
Road conditions remain stable, making it ideal for sightseeing in Gangtok, Lachung, Pelling, and Ravangla. Spring is perfect for family travellers, honeymooners, and first-time visitors.
Summer Weather in Sikkim (June to August)
Summer brings moderate temperatures (15°C to 28°C) but also marks the beginning of the monsoon season. Rainfall increases gradually, especially in July and August.
While valleys turn lush green, landslides and roadblocks may occur in remote areas. Travel is still possible, but itineraries should remain flexible. Summer suits travellers who prefer greenery and fewer crowds.
Autumn Weather in Sikkim (September to November)
Autumn is considered the best weather season in Sikkim. Rainfall decreases, skies clear up, and temperatures stay between 10°C to 22°C.
This season offers the best views of Mount Kanchenjunga, excellent road conditions, and ideal weather for sightseeing, photography, and cultural exploration. Most Sikkim tour packages are in high demand during this period.
Winter Weather in Sikkim (December to February)
Winter temperatures range from 0°C to 15°C, with heavy snowfall in higher regions like Lachung, Lachen, and Nathula Pass.
While snowfall lovers enjoy winter charm, access to certain areas may be restricted due to snow accumulation. Travellers should check road conditions and permits before planning winter trips.
Month-Wise Weather Overview (Quick Snapshot)
January – February: Cold, snowfall in higher regions
March – April: Pleasant spring weather, flowers bloom
May: Mild summer begins, clear views
June – July: Monsoon starts, heavy rain
August: Peak monsoon, lush landscapes
September – October: Clear skies, best travel window
November: Cool and dry
December: Cold, early snowfall possible
Does Weather Affect Permits & Sightseeing?
Yes. Weather directly impacts:
Nathula Pass access
North Sikkim road conditions
Inner line permit approvals
Helicopter and mountain travel
For seasonal permit planning, travellers should refer to the Sikkim permits guide and weather updates before finalising travel dates.
