December is one of the cooler months of the year in East Sikkim, with average highs near 8.1°C and lows around -2.4°C (mean 2.8°C). It is one of the drier months, averaging 4 mm of rainfall and 60% relative humidity across the period.
December is one of the cooler months of the year in East Sikkim. Across 45 years of records, the warmest December in East Sikkim was 2017 — when the month averaged 5.3°C — while the coldest was 1989 at 0.9°C. Typical December days reach 8.1°C with nights near -2.4°C. The long-term trend is warming, about 0.4°C per decade.
December is one of the drier months in East Sikkim, averaging 4 mm of rainfall. The wettest December on record was 2018 with 15 mm, while the driest were 2016, 2017 and 2025, among others at 0 mm.
Relative humidity in East Sikkim during December averages 60%. The most humid December was 2021 at 77%, and the least humid was 1996 at 43%.
December receives about 3.5 kWh/m²/day of solar energy in East Sikkim. The sunniest December was 2005 at 4.1 kWh/m²/day, and the cloudiest were 1995 and 1997 at 2.9.
Average wind speed in East Sikkim during December is 1 m/s. The windiest Decembers were 2015, 2018 and 2019, among others at 1.1 m/s, while the calmest were 2022, 2023 and 2025, among others at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 2.3°C | 2.3°C | 3.1°C | 3.0°C | 3.7°C | +1.4°C |
| Avg High | 7.8°C | 7.8°C | 8.6°C | 8.1°C | 8.4°C | +0.6°C |
| Avg Low | -3.2°C | -3.2°C | -2.3°C | -2.0°C | -1.0°C | +2.2°C |
| Avg Rain | 6 mm | 2 mm | 2 mm | 3 mm | 6 mm | +0 mm |
December temperatures in East Sikkim have risen by about 1.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -13.4°C (2018) to a record high of 13.9°C (1988).
Rainfall in December is one of the drier months, averaging 4 mm, with a wettest year of 15 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.6°C per decade, narrowing the gap between day and night.
A quieter season to visit East Sikkim
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting East Sikkim. That said, December — with days averaging 8.1°C and nights around -2.4°C (mean 2.8°C) and low rainfall (4 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 9.8°C | 4.7°C | -0.4°C | 12.9°C | -5.1°C | 0 mm | 63% | 0.9 m/s | — |
| 2024 | 8.4°C | 3.7°C | -1.1°C | 12.4°C | -5.5°C | 2 mm | 70% | 1 m/s | 3.5 |
| 2023 | 8.4°C | 3.8°C | -0.7°C | 11.3°C | -4.5°C | 9 mm | 71% | 0.9 m/s | 3.4 |
| 2022 | 8.8°C | 4.1°C | -0.5°C | 11.9°C | -5.8°C | 1 mm | 75% | 0.9 m/s | 3.3 |
| 2021 | 6.6°C | 2.3°C | -2.0°C | 12.9°C | -7.1°C | 13 mm | 77% | 1 m/s | 3.4 |
| 2020 | 8.1°C | 3.4°C | -1.4°C | 10.4°C | -6.0°C | 10 mm | 69% | 1 m/s | 3.5 |
| 2019 | 6.1°C | 1.3°C | -3.6°C | 8.9°C | -7.9°C | 9 mm | 66% | 1.1 m/s | 3.3 |
| 2018 🌧️ | 6.2°C | 1.0°C | -4.1°C | 9.4°C | -13.4°C | 15 mm | 67% | 1.1 m/s | 3.4 |
| 2017 🔥 | 9.9°C | 5.3°C | 0.8°C | 12.8°C | -6.1°C | 0 mm | 61% | 0.9 m/s | 4 |
| 2016 | 10.2°C | 5.2°C | 0.3°C | 13.9°C | -5.5°C | 0 mm | 64% | 1 m/s | 3.8 |
| 2015 | 6.7°C | 1.9°C | -2.8°C | 10.6°C | -7.1°C | 1 mm | 70% | 1.1 m/s | 3.2 |
| 2014 | 9.2°C | 4.1°C | -0.9°C | 13.7°C | -9.6°C | 4 mm | 56% | 1 m/s | 3.5 |
| 2013 | 7.4°C | 2.5°C | -2.5°C | 10.2°C | -9.4°C | 1 mm | 68% | 1.1 m/s | 3.2 |
| 2012 | 8.8°C | 3.2°C | -2.3°C | 12.8°C | -9.3°C | 0 mm | 49% | 1.1 m/s | 3.8 |
| 2011 | 8.4°C | 3.4°C | -1.6°C | 13.3°C | -4.5°C | 3 mm | 63% | 1 m/s | 3.6 |
| 2010 | 7.7°C | 2.4°C | -2.9°C | 10.6°C | -10.5°C | 0 mm | 55% | 1.1 m/s | 3.9 |
| 2009 | 7.8°C | 2.6°C | -2.6°C | 11.7°C | -8.0°C | 1 mm | 64% | 0.9 m/s | 3.2 |
| 2008 | 9.9°C | 4.5°C | -0.9°C | 13.9°C | -6.1°C | 0 mm | 67% | 1 m/s | 3.2 |
| 2007 | 8.7°C | 3.2°C | -2.3°C | 11.8°C | -5.3°C | 0 mm | 56% | 1 m/s | 3.7 |
| 2006 | 9.0°C | 3.7°C | -1.7°C | 12.5°C | -5.0°C | 3 mm | 61% | 1 m/s | 3.3 |
| 2005 | 8.5°C | 3.3°C | -1.9°C | 11.4°C | -9.0°C | 0 mm | 50% | 1 m/s | 4.1 |
| 2004 | 9.0°C | 3.3°C | -2.4°C | 13.3°C | -11.1°C | 0 mm | 60% | 1 m/s | 3.5 |
| 2003 | 7.4°C | 2.2°C | -2.9°C | 11.4°C | -11.3°C | 10 mm | 62% | 1 m/s | 3.4 |
| 2002 | 8.1°C | 2.6°C | -2.9°C | 12.2°C | -7.3°C | 1 mm | 57% | 1 m/s | 3.4 |
| 2001 | 8.0°C | 2.6°C | -2.7°C | 11.1°C | -7.6°C | 0 mm | 57% | 1 m/s | 3.6 |
| 2000 | 9.2°C | 3.4°C | -2.4°C | 12.8°C | -6.8°C | 0 mm | 51% | 1.1 m/s | 3.8 |
| 1999 | 7.5°C | 2.2°C | -3.0°C | 11.2°C | -7.1°C | 0 mm | 64% | 1.1 m/s | 3.2 |
| 1998 | 8.7°C | 3.1°C | -2.6°C | 13.0°C | -7.4°C | 0 mm | 53% | 1.1 m/s | 3.7 |
| 1997 | 6.7°C | 1.3°C | -4.1°C | 9.3°C | -9.0°C | 12 mm | 62% | 1.1 m/s | 2.9 |
| 1996 | 9.0°C | 3.2°C | -2.6°C | 10.5°C | -7.6°C | 0 mm | 43% | 1.1 m/s | 4 |
| 1995 | 7.2°C | 1.9°C | -3.4°C | 9.8°C | -6.5°C | 5 mm | 64% | 1 m/s | 2.9 |
| 1994 | 7.5°C | 1.7°C | -4.1°C | 11.5°C | -8.5°C | 0 mm | 49% | 1.1 m/s | 3.4 |
| 1993 | 9.4°C | 3.9°C | -1.6°C | 13.5°C | -4.9°C | 0 mm | 49% | 1 m/s | 3.5 |
| 1992 | 6.9°C | 1.2°C | -4.4°C | 9.6°C | -9.4°C | 1 mm | 55% | 1.1 m/s | 3.5 |
| 1991 | 6.9°C | 1.5°C | -3.9°C | 12.1°C | -9.7°C | 4 mm | 63% | 1.1 m/s | 3.5 |
| 1990 | 8.2°C | 3.0°C | -2.1°C | 9.7°C | -5.6°C | 0 mm | 57% | 1 m/s | 3.5 |
| 1989 ❄️ | 6.8°C | 0.9°C | -5.0°C | 10.7°C | -10.8°C | 1 mm | 56% | 1.1 m/s | 3.5 |
| 1988 | 8.7°C | 3.4°C | -1.9°C | 13.9°C | -6.2°C | 6 mm | 58% | 1 m/s | 3.2 |
| 1987 | 9.9°C | 4.0°C | -2.0°C | 13.3°C | -8.6°C | 0 mm | 53% | 1.1 m/s | 3.5 |
| 1986 | 6.6°C | 1.2°C | -4.2°C | 11.4°C | -9.0°C | 11 mm | 62% | 1.1 m/s | 3.4 |
| 1985 | 8.2°C | 3.0°C | -2.2°C | 11.9°C | -8.7°C | 13 mm | 63% | 1 m/s | 3.4 |
| 1984 | 8.2°C | 2.8°C | -2.5°C | 10.7°C | -4.2°C | 1 mm | 59% | 1.1 m/s | 3.4 |
| 1983 | 7.2°C | 1.7°C | -3.9°C | 10.3°C | -9.2°C | 6 mm | 53% | 1.1 m/s | — |
| 1982 | 7.4°C | 2.0°C | -3.5°C | 11.5°C | -9.3°C | 0 mm | 61% | 1.1 m/s | — |
| 1981 | 7.2°C | 1.7°C | -3.8°C | 9.4°C | -8.7°C | 13 mm | 59% | 1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 8.1°C with lows near -2.4°C (mean 2.8°C), based on 45 years of NASA POWER data.
December averages 4 mm of rainfall in East Sikkim, one of the drier months. The wettest on record was 15 mm in 2018.
The hottest December reached 13.9°C in 1988. The coldest dipped to -13.4°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.5°C. Daytime highs moved from 7.6°C to 8.4°C and overnight lows from -3.2°C to -0.9°C over the same span.
December is one of the cooler months of the year in East Sikkim and one of the drier months, so plan for around 8.1°C daytime highs and -2.4°C at night.
Not quite — December is the 3rd coolest month in East Sikkim, averaging 2.8°C.
For December in East Sikkim, pack warm layers and a jacket for chilly mornings, with typical highs of 8.1°C and lows of -2.4°C.
Relative humidity in December averages 60% — moderately humid.
Average wind speed in December is 1 m/s. The windiest December on record averaged 1.1 m/s (1982).
The wettest December on record was 2018 with 15 mm. On average, December sees 4 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in East Sikkim behaves each December, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for December specifically, along with year-by-year records and how the month has changed over the decades.
