Sikkim
Sikkim weather by month (Gangtok)
Average temperature and rainfall for every month in Gangtok (about 1,650 m above sea level), from India Meteorological Department climate normals, 1991–2020. These are long-term averages to help you pick when to travel, not a forecast. For today's weather, check the IMD forecast.
Best time to visit Sikkim
March to May (rhododendrons in bloom) and October to December (clear skies) are the favourite seasons. From January to March North Sikkim can have heavy snow, so some passes close. From June to September monsoon landslides often cut roads, especially to the north.
Gangtok temperature and rainfall
| Month | Day high | Night low | Rain | What to expect |
|---|---|---|---|---|
| January | 12°C | 6°C | 26 mm | Cool, mostly dry |
| February | 14°C | 7°C | 54 mm | Cool, some rain |
| March | 18°C | 10°C | 133 mm | Mild, some rain |
| April | 20°C | 13°C | 333 mm | Mild, wet |
| May | 21°C | 15°C | 496 mm | Mild, heavy monsoon rain |
| June | 22°C | 17°C | 647 mm | Mild, heavy monsoon rain |
| July | 22°C | 18°C | 655 mm | Warm, heavy monsoon rain |
| August | 22°C | 18°C | 548 mm | Warm, heavy monsoon rain |
| September | 22°C | 17°C | 428 mm | Mild, heavy monsoon rain |
| October | 20°C | 14°C | 174 mm | Mild, wet |
| November | 17°C | 10°C | 37 mm | Cool, mostly dry |
| December | 14°C | 7°C | 16 mm | Cool, mostly dry |
Gangtok weather in January
In January, Gangtok averages a daytime high of about 12°C and a night-time low of about 6°C, with around 26 mm of rain over the month (cool, mostly dry).
Gangtok weather in February
In February, Gangtok averages a daytime high of about 14°C and a night-time low of about 7°C, with around 54 mm of rain over the month (cool, some rain).
Gangtok weather in March
In March, Gangtok averages a daytime high of about 18°C and a night-time low of about 10°C, with around 133 mm of rain over the month (mild, some rain).
Gangtok weather in April
In April, Gangtok averages a daytime high of about 20°C and a night-time low of about 13°C, with around 333 mm of rain over the month (mild, wet).
Gangtok weather in May
In May, Gangtok averages a daytime high of about 21°C and a night-time low of about 15°C, with around 496 mm of rain over the month (mild, heavy monsoon rain).
Gangtok weather in June
In June, Gangtok averages a daytime high of about 22°C and a night-time low of about 17°C, with around 647 mm of rain over the month (mild, heavy monsoon rain).
Gangtok weather in July
In July, Gangtok averages a daytime high of about 22°C and a night-time low of about 18°C, with around 655 mm of rain over the month (warm, heavy monsoon rain).
Gangtok weather in August
In August, Gangtok averages a daytime high of about 22°C and a night-time low of about 18°C, with around 548 mm of rain over the month (warm, heavy monsoon rain).
Gangtok weather in September
In September, Gangtok averages a daytime high of about 22°C and a night-time low of about 17°C, with around 428 mm of rain over the month (mild, heavy monsoon rain).
Gangtok weather in October
In October, Gangtok averages a daytime high of about 20°C and a night-time low of about 14°C, with around 174 mm of rain over the month (mild, wet).
Gangtok weather in November
In November, Gangtok averages a daytime high of about 17°C and a night-time low of about 10°C, with around 37 mm of rain over the month (cool, mostly dry).
Gangtok weather in December
In December, Gangtok averages a daytime high of about 14°C and a night-time low of about 7°C, with around 16 mm of rain over the month (cool, mostly dry).
Gangtok weather: common questions
+What is the best time to visit Sikkim?
March to May (rhododendrons in bloom) and October to December (clear skies) are the favourite seasons. From January to March North Sikkim can have heavy snow, so some passes close. From June to September monsoon landslides often cut roads, especially to the north.
+What is the coldest month in Gangtok?
January, with night-time lows of about 6°C and daytime highs around 12°C. Pack warm layers for the evenings.
+When is the monsoon in Gangtok?
Heavy rain falls from April to September, peaking in July at around 655 mm. Gangtok gets about 3,547 mm of rain a year, almost all of it in those months.
+What is the weather in Gangtok today?
The figures on this page are long-term monthly averages, not a forecast. For today's weather and the next few days, check the India Meteorological Department forecast (mausam.imd.gov.in) before you travel.
Last reviewed September 2026. Permit rules, park dates, fares and road conditions change, so confirm locally before you travel. Spotted something out of date? Tell us.