January is one of the cooler months of the year in Upper Siang, with average highs near 14.5°C and lows around 3.4°C (mean 9°C). It is one of the drier months, averaging 13 mm of rainfall and 73% relative humidity across the period.
January is one of the cooler months of the year in Upper Siang. Across 45 years of records, the warmest January in Upper Siang was 2015 — when the month averaged 11.3°C — while the coldest were 1984 and 1993 at 7.2°C. Typical January days reach 14.5°C with nights near 3.4°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Upper Siang, averaging 13 mm of rainfall. The wettest January on record was 2020 with 39 mm, while the driest was 2010 at 0 mm.
Relative humidity in Upper Siang during January averages 73%. The most humid January was 2016 at 81%, and the least humid was 1999 at 57%.
January receives about 3.2 kWh/m²/day of solar energy in Upper Siang. The sunniest January was 2010 at 4 kWh/m²/day, and the cloudiest were 2008 and 2012 at 2.5.
Average wind speed in Upper Siang during January is 0.5 m/s. The windiest Januarys were 1999, 2006 and 2010, among others at 0.6 m/s, while the calmest was 2020 at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.4°C | 8.5°C | 9.1°C | 9.4°C | 9.4°C | +1°C |
| Avg High | 14.3°C | 14.4°C | 14.8°C | 14.7°C | 14.4°C | +0.1°C |
| Avg Low | 2.6°C | 2.6°C | 3.5°C | 4.2°C | 4.4°C | +1.8°C |
| Avg Rain | 10 mm | 15 mm | 16 mm | 8 mm | 20 mm | +11 mm |
January temperatures in Upper Siang have risen by about 1.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -1.1°C (1992) to a record high of 25.7°C (2018).
Rainfall in January is one of the drier months, averaging 13 mm, with a wettest year of 39 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A quieter season to visit Upper Siang
If your dates are flexible, the more temperate months of October and May tend to be the most comfortable for visiting Upper Siang. That said, January — with days averaging 14.5°C and nights around 3.4°C (mean 9°C) and low rainfall (13 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 | 15.5°C | 10.4°C | 5.3°C | 19.0°C | 2.6°C | 27 mm | 78% | 0.4 m/s | 3.2 |
| 2024 | 14.5°C | 8.9°C | 3.3°C | 19.6°C | 1.1°C | 8 mm | 74% | 0.5 m/s | 3.4 |
| 2023 | 14.9°C | 9.5°C | 4.2°C | 22.0°C | 1.3°C | 5 mm | 73% | 0.5 m/s | 3 |
| 2022 | 13.5°C | 8.6°C | 3.7°C | 17.3°C | 1.0°C | 28 mm | 77% | 0.4 m/s | 3.1 |
| 2021 | 14.6°C | 10.0°C | 5.4°C | 17.4°C | 2.1°C | 14 mm | 79% | 0.4 m/s | 2.9 |
| 2020 🌧️ | 13.6°C | 9.0°C | 4.3°C | 21.1°C | 2.0°C | 39 mm | 80% | 0.3 m/s | 2.7 |
| 2019 | 15.1°C | 9.3°C | 3.4°C | 17.4°C | -0.5°C | 11 mm | 71% | 0.5 m/s | 3.7 |
| 2018 | 14.8°C | 10.2°C | 5.6°C | 25.7°C | 1.4°C | 14 mm | 81% | 0.4 m/s | 3 |
| 2017 | 15.9°C | 10.3°C | 4.8°C | 21.0°C | 1.2°C | 3 mm | 71% | 0.5 m/s | 3.8 |
| 2016 | 13.4°C | 8.8°C | 4.2°C | 19.7°C | 2.2°C | 16 mm | 81% | 0.4 m/s | 3.3 |
| 2015 🔥 | 16.3°C | 11.3°C | 6.2°C | 23.5°C | 2.6°C | 8 mm | 76% | 0.4 m/s | 3.5 |
| 2014 | 15.1°C | 9.7°C | 4.3°C | 20.4°C | 2.3°C | 4 mm | 77% | 0.4 m/s | 3.6 |
| 2013 | 14.7°C | 9.6°C | 4.6°C | 17.7°C | 1.1°C | 4 mm | 76% | 0.4 m/s | 3.5 |
| 2012 | 12.7°C | 7.6°C | 2.5°C | 16.7°C | -0.2°C | 13 mm | 79% | 0.4 m/s | 2.5 |
| 2011 | 12.7°C | 7.6°C | 2.5°C | 16.0°C | -0.5°C | 11 mm | 78% | 0.4 m/s | 2.8 |
| 2010 | 16.0°C | 9.7°C | 3.4°C | 18.5°C | 1.5°C | 0 mm | 65% | 0.6 m/s | 4 |
| 2009 | 15.2°C | 9.7°C | 4.2°C | 18.2°C | 1.4°C | 25 mm | 79% | 0.4 m/s | 3 |
| 2008 | 13.3°C | 8.3°C | 3.3°C | 18.5°C | 0.5°C | 30 mm | 78% | 0.4 m/s | 2.5 |
| 2007 | 14.9°C | 9.2°C | 3.6°C | 20.3°C | 0.8°C | 3 mm | 70% | 0.5 m/s | 3 |
| 2006 | 15.8°C | 10.1°C | 4.4°C | 22.4°C | 1.8°C | 1 mm | 66% | 0.6 m/s | 3.5 |
| 2005 | 14.6°C | 8.9°C | 3.2°C | 22.6°C | 0.0°C | 21 mm | 73% | 0.5 m/s | 3 |
| 2004 | 14.1°C | 8.5°C | 2.9°C | 16.2°C | 0.8°C | 6 mm | 71% | 0.5 m/s | 3.1 |
| 2003 | 15.5°C | 9.4°C | 3.4°C | 22.2°C | 1.5°C | 16 mm | 68% | 0.5 m/s | 3.4 |
| 2002 | 15.0°C | 9.3°C | 3.5°C | 21.4°C | 0.9°C | 27 mm | 72% | 0.4 m/s | 2.9 |
| 2001 | 15.0°C | 9.2°C | 3.4°C | 18.3°C | 1.1°C | 7 mm | 67% | 0.5 m/s | 2.9 |
| 2000 | 14.4°C | 8.8°C | 3.1°C | 18.1°C | 1.0°C | 27 mm | 68% | 0.5 m/s | 2.9 |
| 1999 | 16.1°C | 9.5°C | 3.0°C | 21.6°C | -1.1°C | 3 mm | 57% | 0.6 m/s | 3.7 |
| 1998 | 13.7°C | 7.9°C | 2.0°C | 17.4°C | -0.7°C | 11 mm | 69% | 0.5 m/s | 3 |
| 1997 | 14.4°C | 8.4°C | 2.3°C | 20.5°C | 0.1°C | 11 mm | 68% | 0.5 m/s | 3.3 |
| 1996 | 13.6°C | 8.0°C | 2.4°C | 16.9°C | 0.2°C | 22 mm | 77% | 0.4 m/s | 3 |
| 1995 | 14.2°C | 8.1°C | 1.9°C | 17.2°C | -0.1°C | 14 mm | 67% | 0.5 m/s | 3 |
| 1994 | 15.6°C | 9.7°C | 3.8°C | 18.6°C | 0.2°C | 18 mm | 69% | 0.5 m/s | 3.4 |
| 1993 | 12.5°C | 7.2°C | 2.0°C | 18.9°C | -0.3°C | 36 mm | 78% | 0.4 m/s | 2.7 |
| 1992 | 13.9°C | 8.1°C | 2.4°C | 17.8°C | -1.1°C | 21 mm | 71% | 0.5 m/s | 3.5 |
| 1991 | 13.8°C | 8.0°C | 2.3°C | 18.8°C | -0.2°C | 1 mm | 73% | 0.5 m/s | 3.1 |
| 1990 | 15.8°C | 9.9°C | 3.9°C | 18.7°C | 0.3°C | 16 mm | 77% | 0.5 m/s | 3.3 |
| 1989 | 13.9°C | 8.1°C | 2.4°C | 16.6°C | -0.3°C | 11 mm | 71% | 0.5 m/s | 3.1 |
| 1988 | 15.4°C | 9.5°C | 3.6°C | 23.7°C | 0.9°C | 9 mm | 72% | 0.5 m/s | 3 |
| 1987 | 15.8°C | 9.3°C | 2.7°C | 18.5°C | -0.9°C | 1 mm | 67% | 0.6 m/s | 3.8 |
| 1986 | 14.8°C | 8.6°C | 2.4°C | 21.3°C | 0.8°C | 7 mm | 72% | 0.5 m/s | 3.3 |
| 1985 | 13.6°C | 8.0°C | 2.3°C | 16.5°C | 0.3°C | 8 mm | 74% | 0.5 m/s | 2.9 |
| 1984 ❄️ | 12.7°C | 7.2°C | 1.7°C | 16.7°C | 0.0°C | 9 mm | 74% | 0.5 m/s | 2.9 |
| 1983 | 12.8°C | 7.3°C | 1.8°C | 16.7°C | 0.0°C | 8 mm | 71% | 0.5 m/s | — |
| 1982 | 15.6°C | 9.5°C | 3.5°C | 18.8°C | 1.0°C | 13 mm | 76% | 0.5 m/s | — |
| 1981 | 13.8°C | 8.4°C | 3.0°C | 20.2°C | 0.9°C | 21 mm | 76% | 0.4 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 14.5°C with lows near 3.4°C (mean 9°C), based on 45 years of NASA POWER data.
January averages 13 mm of rainfall in Upper Siang, one of the drier months. The wettest on record was 39 mm in 2020.
The hottest January reached 25.7°C in 2018. The coldest dipped to -1.1°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.4°C. Daytime highs moved from 13.7°C to 14.6°C and overnight lows from 2.5°C to 4.4°C over the same span.
January is one of the cooler months of the year in Upper Siang and one of the drier months, so plan for around 14.5°C daytime highs and 3.4°C at night.
Yes — January is the coldest month of the year in Upper Siang, averaging 9°C.
For January in Upper Siang, pack warm layers and a jacket for chilly mornings, with typical highs of 14.5°C and lows of 3.4°C.
Relative humidity in January averages 73% — moderately humid.
Average wind speed in January is 0.5 m/s. The windiest January on record averaged 0.6 m/s (1987).
The wettest January on record was 2020 with 39 mm. On average, January sees 13 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 Siang behaves each January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
