Gangtok Weather in September
Gangtok in September averages 21°C (70°F) during the day and 15°C (59°F) at night. September is part of the rainy season, so frequent rainfall is typical.
Rainfall in Gangtok in September
Gangtok is in the rainy season in September, with rain on around 11 days and an average of 518 mm (20 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Gangtok in September
Gangtok in September gets highs of 21°C (70°F) during the day and drops to 15°C (59°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to around 15°C (59°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.If you're interested in exploring other destinations, our weather planner can help you discover additional travel options worldwide.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit India, check out our Gangtok's climate page.
Gangtok Temperature in September
Min Temperature
15°C (59°F)
Max Temperature
21°C (70°F)
Chance of Rain
38%
Precipitation
518 mm (20 in)
Rainy days
11 days
Humidity
90%
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Gangtok typically stay consistent throughout September, with daily highs averaging around 21°C (70°F). Nights are cold, with lows typically ranging from 2°C (36°F) to 5°C (41°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Gangtok in September
Browse day-by-day weather records for Gangtok spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Gangtok historical weather extremes in September
Based on weather observations in Gangtok between 1994 and 2025, these are the recorded extremes during September.
- Gangtok recorded its highest September temperature of 36°C (97°F) on September 20, 2020.
- The wettest day in September Gangtok was on September 25, 2005 with 256 mm (10 in) of precipitation.
Best Places in India in September
Find out more about the weather in India and which places have the best travel conditions in this month. See all of India in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Gangtok in September
For Gangtok in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can.What To Do in Gangtok in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit India, check out our Gangtok's climate page.
See the full Gangtok climate overview or explore weather in India.
