Monthly climate guide
Gangtok weather in September
With highs near 16°C (61°F) and lows around 9°C (48°F), September feels mild in Gangtok. Rainfall averages about 197 mm (very wet) and the sky is often cloudy. Daytime highs are about the same as August and 3°C warmer than October.
What stands out in September
- Just 400 km apart, but Gangtok runs about 16°C cooler than Patna this month.
- Rain is above Gangtok's usual level, by about 79%.
- In Gangtok, September is early autumn.
Avg high
16°C
61°F
Avg low
9°C
48°F
Rainfall
197 mm
very wet
Humidity
90%
relative
Sky
84%
cloud · often cloudy
Gangtok weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 6°C / 42°F | -5°C / 23°F | 6 mm | 62% | 63% |
| February | 8°C / 46°F | -3°C / 26°F | 16 mm | 60% | 68% |
| March | 10°C / 51°F | -1°C / 31°F | 42 mm | 63% | 73% |
| April | 13°C / 55°F | 2°C / 36°F | 78 mm | 70% | 78% |
| May | 16°C / 60°F | 6°C / 42°F | 143 mm | 78% | 82% |
| June | 18°C / 64°F | 9°C / 49°F | 208 mm | 86% | 85% |
| July | 17°C / 63°F | 11°C / 51°F | 323 mm | 91% | 89% |
| August | 17°C / 63°F | 10°C / 50°F | 264 mm | 90% | 88% |
| September | 16°C / 61°F | 9°C / 48°F | 197 mm | 90% | 84% |
| October | 13°C / 56°F | 5°C / 41°F | 41 mm | 83% | 68% |
| November | 11°C / 51°F | 1°C / 35°F | 2 mm | 72% | 58% |
| December | 8°C / 47°F | -2°C / 29°F | 4 mm | 63% | 57% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Gangtok?
Compare the months in the chart above to find your ideal window.
Best time to visit Gangtok →Other India cities in September
Cite or embed this data
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Gangtok weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/india/gangtok/september
<a href="https://weathercompare.eu/weather/india/gangtok/september">Gangtok weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/india/gangtok" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Gangtok weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/india/gangtok/september">Gangtok weather in September</a> – WeatherCompare</p>
Gangtok in September: quick answers
Is September a good time to visit Gangtok?
September is one of the wetter months in Gangtok, with about 197 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Gangtok in September?
Average highs are about 16°C (61°F) and average lows about 9°C (48°F), based on 10 years of daily data.
Does it rain a lot in Gangtok in September?
Gangtok typically gets around 197 mm of rain in September — very wet.
Figures are long-term averages for the area around Gangtok (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.