December is one of the cooler months of the year in Upper Subansiri, with average highs near 21.2°C and lows around 4°C (mean 12.6°C). It is one of the drier months, averaging 11 mm of rainfall and 75% relative humidity across the period.
December is one of the cooler months of the year in Upper Subansiri. Across 45 years of records, the warmest December in Upper Subansiri was 2016 — when the month averaged 16.1°C — while the coldest was 1983 at 10.3°C. Typical December days reach 21.2°C with nights near 4°C. The long-term trend is warming, about 0.3°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.3°C | 12.2°C | 12.7°C | 13.0°C | 13.1°C | +0.8°C |
| Avg High | 21.1°C | 21.1°C | 21.6°C | 21.3°C | 21.1°C | 0°C |
| Avg Low | 3.6°C | 3.4°C | 3.9°C | 4.7°C | 5.1°C | +1.5°C |
| Avg Rain | 22 mm | 9 mm | 6 mm | 9 mm | 10 mm | -12 mm |
December temperatures in Upper Subansiri have risen by about 1.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 1.9°C (1994) to a record high of 25.4°C (2001).
Rainfall in December is one of the drier months, averaging 11 mm, with a wettest year of 68 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A good time to visit Upper Subansiri
December is a good time to visit Upper Subansiri, with days averaging 21.2°C and nights around 4°C (mean 12.6°C, cooler than Upper Subansiri's yearly average) and low rainfall. October and November are marginally more temperate, but December still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 21.5°C | 6.0°C | 13.7°C | 3 mm | 77% | 0.6 m/s | — |
| 2024 | 18.9°C | 5.0°C | 11.9°C | 1 mm | 77% | 0.6 m/s | 3 |
| 2023 | 22.3°C | 6.1°C | 14.2°C | 14 mm | 78% | 0.6 m/s | 3.1 |
| 2022 | 20.5°C | 4.1°C | 12.3°C | 22 mm | 83% | 0.5 m/s | 2.5 |
| 2021 | 21.3°C | 3.4°C | 12.4°C | 11 mm | 79% | 0.5 m/s | 3 |
| 2020 | 21.9°C | 5.9°C | 13.9°C | 10 mm | 84% | 0.5 m/s | 2.8 |
| 2019 | 21.1°C | 3.5°C | 12.3°C | 4 mm | 81% | 0.5 m/s | 2.8 |
| 2018 | 20.1°C | 6.0°C | 13.1°C | 21 mm | 80% | 0.5 m/s | 3.1 |
| 2017 | 21.3°C | 7.0°C | 14.1°C | 1 mm | 81% | 0.5 m/s | 3.3 |
| 2016 🔥 | 25.2°C | 7.0°C | 16.1°C | 5 mm | 75% | 0.5 m/s | 3.4 |
| 2015 | 19.8°C | 2.9°C | 11.4°C | 12 mm | 82% | 0.5 m/s | 2.6 |
| 2014 | 20.8°C | 5.4°C | 13.1°C | 3 mm | 81% | 0.5 m/s | 3 |
| 2013 | 20.8°C | 2.9°C | 11.8°C | 7 mm | 81% | 0.5 m/s | 2.8 |
| 2012 | 20.8°C | 5.1°C | 13.0°C | 13 mm | 84% | 0.5 m/s | 2.9 |
| 2011 | 22.2°C | 4.1°C | 13.1°C | 18 mm | 78% | 0.6 m/s | 2.8 |
| 2010 | 21.1°C | 2.9°C | 12.0°C | 5 mm | 73% | 0.6 m/s | 3.5 |
| 2009 | 18.6°C | 3.7°C | 11.1°C | 7 mm | 82% | 0.5 m/s | 2.4 |
| 2008 | 20.6°C | 3.4°C | 12.0°C | 2 mm | 79% | 0.6 m/s | 3 |
| 2007 | 19.7°C | 3.5°C | 11.6°C | 8 mm | 72% | 0.7 m/s | 3.2 |
| 2006 | 21.7°C | 5.3°C | 13.5°C | 11 mm | 75% | 0.6 m/s | 2.9 |
| 2005 | 20.4°C | 4.5°C | 12.4°C | 0 mm | 68% | 0.7 m/s | 3.6 |
| 2004 | 23.1°C | 3.3°C | 13.2°C | 12 mm | 75% | 0.6 m/s | 3.1 |
| 2003 | 21.3°C | 3.0°C | 12.1°C | 3 mm | 73% | 0.6 m/s | 3.1 |
| 2002 | 22.9°C | 4.0°C | 13.4°C | 3 mm | 73% | 0.6 m/s | 3.1 |
| 2001 | 25.4°C | 4.2°C | 14.8°C | 7 mm | 66% | 0.7 m/s | 3.1 |
| 2000 | 22.1°C | 3.8°C | 12.9°C | 4 mm | 63% | 0.7 m/s | 3.4 |
| 1999 | 21.5°C | 3.2°C | 12.3°C | 1 mm | 70% | 0.6 m/s | 3.2 |
| 1998 | 22.8°C | 3.4°C | 13.1°C | 5 mm | 59% | 0.7 m/s | 3.4 |
| 1997 | 18.7°C | 2.8°C | 10.7°C | 20 mm | 73% | 0.6 m/s | 2.8 |
| 1996 | 22.3°C | 5.0°C | 13.6°C | 0 mm | 66% | 0.7 m/s | 3.4 |
| 1995 | 18.5°C | 3.8°C | 11.2°C | 23 mm | 81% | 0.5 m/s | 2.7 |
| 1994 | 20.8°C | 1.9°C | 11.3°C | 0 mm | 67% | 0.7 m/s | 3.2 |
| 1993 | 20.9°C | 4.4°C | 12.6°C | 1 mm | 70% | 0.7 m/s | 3.1 |
| 1992 | 22.1°C | 2.9°C | 12.5°C | 4 mm | 70% | 0.7 m/s | 3.2 |
| 1991 | 23.7°C | 2.2°C | 13.0°C | 36 mm | 74% | 0.6 m/s | 3.1 |
| 1990 | 19.2°C | 4.3°C | 11.7°C | 0 mm | 76% | 0.6 m/s | 3.2 |
| 1989 | 24.6°C | 3.3°C | 14.0°C | 11 mm | 69% | 0.6 m/s | 3.2 |
| 1988 | 22.1°C | 5.1°C | 13.6°C | 7 mm | 78% | 0.6 m/s | 3.1 |
| 1987 | 21.5°C | 5.4°C | 13.4°C | 12 mm | 69% | 0.6 m/s | 3.4 |
| 1986 | 23.1°C | 3.1°C | 13.1°C | 10 mm | 72% | 0.6 m/s | 3.1 |
| 1985 🌧️ | 19.2°C | 4.3°C | 11.7°C | 68 mm | 77% | 0.6 m/s | 3.1 |
| 1984 | 22.5°C | 3.0°C | 12.7°C | 16 mm | 77% | 0.6 m/s | 2.9 |
| 1983 ❄️ | 18.6°C | 2.0°C | 10.3°C | 29 mm | 73% | 0.6 m/s | — |
| 1982 | 18.2°C | 2.5°C | 10.4°C | 9 mm | 77% | 0.6 m/s | — |
| 1981 | 20.1°C | 3.3°C | 11.7°C | 37 mm | 80% | 0.6 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 21.2°C with lows near 4°C (mean 12.6°C), based on 45 years of NASA POWER data.
December averages 11 mm of rainfall in Upper Subansiri, one of the drier months. The wettest on record was 68 mm in 1985.
The hottest December reached 25.4°C in 2001. The coldest dipped to 1.9°C in 1994.
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 19.7°C to 20.9°C and overnight lows from 3°C to 4.9°C over the same span.
December is one of the cooler months of the year in Upper Subansiri and one of the drier months, so plan for around 21.2°C daytime highs and 4°C at night.
Not quite — December is the 3rd coolest month in Upper Subansiri, averaging 12.6°C.
For December in Upper Subansiri, pack warm layers and a jacket for chilly mornings, with typical highs of 21.2°C and lows of 4°C.
Relative humidity in December averages 75% — quite humid.
Average wind speed in December is 0.6 m/s. The windiest December on record averaged 0.7 m/s (1992).
The wettest December on record was 1985 with 68 mm. On average, December sees 11 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 Upper Subansiri 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.
