Last updated: August 21, 2025
In September, Gangtok, India, experiences a temperate climate characterized by maximum temperatures reaching 28°C (83°F) and a comfortable average of 21°C (70°F). The month is marked by significant rainfall, with an impressive 721 mm (28.4 in) of precipitation over 29 days, contributing to the region’s lush greenery. Humidity levels soar to an average of 93%, creating a muggy atmosphere that envelops the charming hill station. This combination of warmth and moisture transforms Gangtok into a captivating retreat for tourists and nature enthusiasts alike, making it an ideal time for exploring its breathtaking landscapes.
September in Gangtok marks a transition into milder temperatures as summer gives way to the crispness of autumn. With minimums hovering around 16°C (61°F) and average highs reaching 28°C (83°F), visitors can expect pleasantly warm days and cooler evenings that invite cozy attire. Compared to the preceding months, this slight dip in both lows and average temperatures offers a refreshing break from the summer heat while still providing comfortable conditions for exploring the city's vibrant landscapes. As the month progresses, the blend of lush greenery and cooler air creates a serene atmosphere, making it an ideal time for both sightseeing and relaxation in this enchanting hill station.
September in Gangtok witnesses a notable shift in precipitation patterns, as the monsoon season gradually recedes. With 721 mm (28.4 in) of rainfall spread over 29 days, the city experiences substantial moisture, although significantly less than the peak months of July and August. This decline marks a transition from the intense deluge of over 1257 mm (49.5 in) in July and 1051 mm (41.4 in) in August, setting the stage for a more temperate climate in the months to follow. As the heavy rains ease, the lush landscapes remain vibrant, showcasing the region's stunning natural beauty, while hinting at the calming yet variable weather that autumn brings.
In Gangtok, India, the humidity levels present a striking pattern throughout the year, with September standing out as a peak month. While the year begins with relatively comfortable humidity, hovering around 59% to 61% in January and February, a noticeable shift occurs as spring gives way to summer. By June, humidity escalates dramatically, reaching a substantial 83%, which continues to climb to a remarkable 93% in both July and August. This high humidity persists through September, locking in at 93%, before beginning a gradual decline as autumn approaches. The transition into October still retains notable moisture levels at 88%, highlighting the lingering effects of the monsoon season. This pattern showcases Gangtok's tropical influences, where the post-monsoon months maintain a muggy ambiance, making it a unique destination for those who appreciate lush, humid environments.
In September, Gangtok experiences a UV Index of 12, categorized as extreme, with a burn time of just 10 minutes—a reminder of the region's high solar exposure during this period. This figure reflects a slight decrease from the peak UV Index of 14 observed in the summer months, yet it remains critical for sun safety. The trend throughout the year showcases a gradual rise in UV intensity, peaking in June, July, and August, before tapering off in October. As daylight hours begin to shorten, it's essential to remain vigilant against sunburn, particularly when enjoying the stunning landscapes of Gangtok. For more details on UV levels and safety tips, visit Gangtok UV Index.
UV Risk Categories
As September rolls into Gangtok, the city enjoys 249 hours of sunshine, striking a delightful balance after the summer months. Following the vibrant highs of May, which boasts 334 hours, the sun begins to wane slightly, yet it still offers a warm embrace. With the monsoon rains behind, September presents a refreshing transition, as the soothing light continues to outshine the turbulent days of July’s 197 hours. This month acts as a gentle prelude to the brilliant sunshine of October, which features 316 hours of radiant days. In Gangtok, the arrival of September marks not just the end of the wet season, but also a time to cherish the calming warmth before winter fully descends.
In September, Gangtok experiences a moderate 20% chance of sunny weather as the monsoon season gradually recedes. After the peak rainy months of July and August, where the likelihood of sunshine plummets to an astonishing 3% and a mere 1%, respectively, September offers a glimmer of hope for clearer skies. While this month sees a slight improvement, the overall trend displays a noticeable dip in sunshine compared to the preceding months of April and May, which enjoy a much higher likelihood of sunny days at 50% and 18%. As autumn approaches, locals and tourists alike can anticipate some brighter moments, albeit still interspersed with lingering rainfall.
As autumn sets in, September in Gangtok, India, welcomes a day length of 12 hours, marking a subtle shift from the summer months. This transitional period sees the daylight duration begin to decrease after a peak of 13 hours during the vibrant summer, which spans from May to August. With the onset of September, the days gradually grow shorter, hinting at the approaching winter months. This gentle reduction in daylight may evoke a sense of reflection and change, as the lush greenery of the region transitions towards the crispness of fall, making it a captivating time for both residents and visitors to experience the unique charm of Gangtok.
In September, the wind in Gangtok begins to whisper a gentle farewell to summer, with an average wind speed of 0.8 m/s (2 mph)—a notable decline from the slightly breezier days earlier in the year. This subtle dip in wind speed mirrors the transition from the vibrant monsoon season to the calmer, cooler autumn months. The winds that once danced through the verdant hills now carry a softer touch, creating a tranquil ambiance in the scenic landscapes. As the year unfolds, there is a fascinating pattern: wind speeds peak during the chillier months of January and November, while late summer and early autumn experience a soothing stillness. This gradual ebb and flow of breezes paints a picture of Gangtok's unique climatic rhythm, inviting visitors to enjoy the serene beauty of the changing seasons.
Weather in Gangtok varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Gangtok, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January in Gangtok present a striking contrast in weather conditions. In September, temperatures range from a mild 16°C (61°F) at night to a warm 28°C (83°F) during the day, accompanied by high humidity at 93% and significant rainfall of 721 mm (28.4 in) spread over 29 days. This month often feels lush and vibrant due to the abundant precipitation. In contrast, January showcases much cooler temperatures, with a minimum of 1°C (33°F) and a maximum of 21°C (70°F), averaging just 10°C (49°F). The winter month sees far less precipitation, totaling 185 mm (7.3 in) over 21 days, and a more comfortable humidity level of 59%. This stark difference makes September a season of lush greenery and warmth, while January offers a crisp and cool atmosphere. For more specifics on January weather, visit Gangtok weather in January.
September and February present stark contrasts in weather. In September, temperatures range from a minimum of 16°C (61°F) to a maximum of 28°C (83°F), averaging at 21°C (70°F). This month is characterized by high humidity at 93% and significant rainfall, accumulating 721 mm (28.4 inches) over 29 days. In contrast, February experiences much cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 22°C (71°F), averaging around 11°C (52°F). Precipitation is notably lower at 228 mm (9.0 inches) spread over 23 days, and humidity drops to 61%. For more specifics on February weather, visit Gangtok weather in February.
In September, the weather is significantly warmer and more humid, with average temperatures ranging from a mild 21°C (70°F) to a high of 28°C (83°F). However, this month also sees considerable rainfall, with precipitation reaching 721 mm (28.4 in) over 29 days, resulting in a high humidity level of 93%. In contrast, March offers cooler temperatures, with averages between 4°C (39°F) and 14°C (58°F), while still allowing for warmer highs of 26°C (79°F). The precipitation in March is notably lower, totaling 367 mm (14.5 in) over 29 days, leading to a much drier atmosphere with only 38% humidity. For more details about the specific weather conditions in March, visit Gangtok weather in March.
September and April exhibit contrasting weather patterns, highlighting the transition from the warmth of summer to the beginnings of autumn. In September, temperatures range from a minimum of 16°C to a maximum of 28°C, with an average of 21°C. The month is characterized by high humidity at 93% and significant rainfall, totaling 721 mm across 29 days. In contrast, April offers a milder climate with temperatures starting at 6°C, peaking at 26°C, and averaging 17°C. The precipitation is much lower in April, at 265 mm over 27 days, and the humidity drops significantly to 34%. For more insights into the weather during this month, visit Gangtok weather in April.
September and May display distinct weather patterns, with September being generally warmer and more humid. In September, temperatures range from a minimum of 16°C (61°F) to a maximum of 28°C (83°F), with an average of 21°C (70°F). The month is characterized by significant precipitation, accumulating 721 mm (28.4 in) over 29 days, paired with a high humidity level of 93%. In contrast, May experiences cooler temperatures, with a minimum of 11°C (51°F) and an average of 19°C (67°F), while still reaching a maximum of 28°C (83°F). The rainfall in May totals 356 mm (14.0 in) across 30 days, accompanied by more moderate humidity at 60%. For those looking to understand the specific weather conditions in May, you can learn more here: Gangtok weather in May.
When comparing the weather in September and June, we find that both months exhibit relatively mild temperatures, but with notable differences in precipitation and humidity. September has a slightly higher average temperature of 21°C (70°F) compared to June's average of 22°C (71°F), with maximum temperatures peaking at 28°C (83°F) in September and 29°C (84°F) in June. However, September experiences significantly more rainfall, with 721 mm (28.4 in) compared to June's 572 mm (22.5 in), both seeing precipitation on 29 days. Additionally, September is noticeably more humid, at 93%, whereas June's humidity is a bit lower at 83%. This increased humidity in September contributes to a more oppressive atmosphere despite the relatively similar temperature ranges. For more detailed insights, you can check the Gangtok weather in June.
In comparing the weather of September and July, we observe that both months exhibit high humidity levels of 93%, creating a consistently moist atmosphere. September has a slightly cooler temperature range, with a minimum of 16°C (61°F) and a maximum of 28°C (83°F), yielding an average of 21°C (70°F). In contrast, July is warmer, featuring a minimum of 18°C (65°F) and a maximum of 29°C (84°F), resulting in an average temperature of 22°C (71°F). However, one of the most significant differences is the precipitation; July experiences a heavy rainfall of 1257 mm (49.5 in) over 31 days, compared to September's rainfall of 721 mm (28.4 in) falling over 29 days. This indicates that July is not only wetter but also has more continuous rainfall, contributing to its overall lushness. For a detailed look at weather conditions during July, you can visit Gangtok weather in July.
In comparing the weather of September and August, September tends to be slightly cooler with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 28°C (83°F), whereas August experiences a higher average, with minimum temperatures at 18°C (64°F) and maximum temperatures reaching 29°C (85°F). While September enjoys a slightly lower average temperature, it also sees a significant amount of rainfall, totaling 721 mm (28.4 in) over 29 days, compared to August's heavier precipitation of 1051 mm (41.4 in) across 31 days. Despite both months having high humidity levels at 93%, the consistency of rain in September may contribute to a more overcast atmosphere compared to August. For more detailed insights on the August weather, you can visit Gangtok weather in August.
September and October weather presents a noticeable transition in climate conditions. In September, temperatures range from a mild 16°C (61°F) to a warm maximum of 28°C (83°F), with an average temperature of 21°C (70°F). This month is marked by high humidity at 93% and significant precipitation, totaling 721 mm (28.4 in) spread over 29 days. Conversely, October experiences cooler temperatures, with a minimum of 7°C (46°F) and an average of 19°C (66°F), while still peaking at 28°C (82°F). Rainfall decreases substantially to 255 mm (10.1 in) over 23 days, and humidity drops slightly to 88%. For more specific insights, you can check Gangtok weather in October.
September and November showcase distinct differences in weather patterns. In September, the temperatures range from a minimum of 16°C (61°F) to a maximum of 28°C (83°F), with an average of 21°C (70°F). This month is also characterized by high precipitation, totaling 721 mm (28.4 in) over 29 days, resulting in a humid environment with a humidity level of 93%.
In contrast, November brings cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 26°C (79°F), and an average temperature of 14°C (58°F). The precipitation decreases significantly to 151 mm (5.9 in) over 20 days, leading to a lower humidity of 80%. These changes mark a transition from the wet, humid conditions of September to the cooler, drier atmosphere of November. For more detailed information, refer to Gangtok weather in November.
In September, the weather is characterized by warm temperatures, with a minimum of 16°C (61°F) rising to a comfortable average of 21°C (70°F) and peaking at 28°C (83°F). However, this month also brings significant rainfall, totaling 721 mm (28.4 in) over 29 days, and high humidity levels at 93%. In contrast, December experiences much cooler temperatures, with a minimum of -1°C (31°F) and an average of only 11°C (52°F), while the maximum temperature reaches 21°C (70°F). Precipitation drops significantly to 152 mm (6.0 in) over 22 days, and humidity decreases to 75%. For more insights, you can refer to Gangtok weather in December.
As September rolls into Gangtok, the weather transforms into a dynamic blend of warmth and moisture, distinguishing it from the drier months that precede it. With average temperatures hovering around a comfortable 21°C (70°F), visitors will experience a subtropical embrace, punctuated by the captivating presence of rain. This month witnesses an astonishing 721 mm of precipitation, making it one of the wettest times of the year, with rain likely on nearly every day. The high humidity levels hovering around 93% add to the lush and vibrant atmosphere, showcasing the breathtaking waterfalls and greenery that thrive in this period. If you're planning a visit, be sure to check detailed forecasts and insights on the ever-changing weather by exploring Gangtok Climate.