January is one of the cooler months of the year in Upper Siang, with average highs near 19.3°C and lows around 0.7°C (mean 10°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 2018 — when the month averaged 13.6°C — while the coldest was 2011 at 7.7°C. Typical January days reach 19.3°C with nights near 0.7°C. The long-term trend is warming, about 0.4°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.6°C | 9.2°C | 10.4°C | 10.4°C | 10.5°C | +0.9°C |
| Avg High | 18.8°C | 18.6°C | 19.8°C | 19.7°C | 19.4°C | +0.6°C |
| Avg Low | 0.3°C | -0.3°C | 1.0°C | 1.1°C | 1.7°C | +1.4°C |
| Avg Rain | 10 mm | 15 mm | 16 mm | 8 mm | 20 mm | +11 mm |
January temperatures in Upper Siang have risen by about 1.2°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.
A quieter season to visit Upper Siang
If your dates are flexible, the more temperate months of October and November tend to be the most comfortable for visiting Upper Siang. That said, January — with days averaging 19.3°C and nights around 0.7°C (mean 10°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 | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 19.0°C | 2.6°C | 10.8°C | 27 mm | 78% | 0.4 m/s | 3.2 |
| 2024 | 19.6°C | 1.1°C | 10.4°C | 8 mm | 74% | 0.5 m/s | 3.4 |
| 2023 | 22.0°C | 1.3°C | 11.6°C | 5 mm | 73% | 0.5 m/s | 3 |
| 2022 | 17.3°C | 1.0°C | 9.1°C | 28 mm | 77% | 0.4 m/s | 3.1 |
| 2021 | 17.4°C | 2.1°C | 9.7°C | 14 mm | 79% | 0.4 m/s | 2.9 |
| 2020 🌧️ | 21.1°C | 2.0°C | 11.5°C | 39 mm | 80% | 0.3 m/s | 2.7 |
| 2019 | 17.4°C | -0.5°C | 8.4°C | 11 mm | 71% | 0.5 m/s | 3.7 |
| 2018 🔥 | 25.7°C | 1.4°C | 13.6°C | 14 mm | 81% | 0.4 m/s | 3 |
| 2017 | 21.0°C | 1.2°C | 11.1°C | 3 mm | 71% | 0.5 m/s | 3.8 |
| 2016 | 19.7°C | 2.2°C | 10.9°C | 16 mm | 81% | 0.4 m/s | 3.3 |
| 2015 | 23.5°C | 2.6°C | 13.0°C | 8 mm | 76% | 0.4 m/s | 3.5 |
| 2014 | 20.4°C | 2.3°C | 11.4°C | 4 mm | 77% | 0.4 m/s | 3.6 |
| 2013 | 17.7°C | 1.1°C | 9.4°C | 4 mm | 76% | 0.4 m/s | 3.5 |
| 2012 | 16.7°C | -0.2°C | 8.3°C | 13 mm | 79% | 0.4 m/s | 2.5 |
| 2011 ❄️ | 16.0°C | -0.5°C | 7.7°C | 11 mm | 78% | 0.4 m/s | 2.8 |
| 2010 | 18.5°C | 1.5°C | 10.0°C | 0 mm | 65% | 0.6 m/s | 4 |
| 2009 | 18.2°C | 1.4°C | 9.8°C | 25 mm | 79% | 0.4 m/s | 3 |
| 2008 | 18.5°C | 0.5°C | 9.5°C | 30 mm | 78% | 0.4 m/s | 2.5 |
| 2007 | 20.3°C | 0.8°C | 10.5°C | 3 mm | 70% | 0.5 m/s | 3 |
| 2006 | 22.4°C | 1.8°C | 12.1°C | 1 mm | 66% | 0.6 m/s | 3.5 |
| 2005 | 22.6°C | 0.0°C | 11.3°C | 21 mm | 73% | 0.5 m/s | 3 |
| 2004 | 16.2°C | 0.8°C | 8.5°C | 6 mm | 71% | 0.5 m/s | 3.1 |
| 2003 | 22.2°C | 1.5°C | 11.8°C | 16 mm | 68% | 0.5 m/s | 3.4 |
| 2002 | 21.4°C | 0.9°C | 11.1°C | 27 mm | 72% | 0.4 m/s | 2.9 |
| 2001 | 18.3°C | 1.1°C | 9.7°C | 7 mm | 67% | 0.5 m/s | 2.9 |
| 2000 | 18.1°C | 1.0°C | 9.5°C | 27 mm | 68% | 0.5 m/s | 2.9 |
| 1999 | 21.6°C | -1.1°C | 10.3°C | 3 mm | 57% | 0.6 m/s | 3.7 |
| 1998 | 17.4°C | -0.7°C | 8.4°C | 11 mm | 69% | 0.5 m/s | 3 |
| 1997 | 20.5°C | 0.1°C | 10.3°C | 11 mm | 68% | 0.5 m/s | 3.3 |
| 1996 | 16.9°C | 0.2°C | 8.5°C | 22 mm | 77% | 0.4 m/s | 3 |
| 1995 | 17.2°C | -0.1°C | 8.6°C | 14 mm | 67% | 0.5 m/s | 3 |
| 1994 | 18.6°C | 0.2°C | 9.4°C | 18 mm | 69% | 0.5 m/s | 3.4 |
| 1993 | 18.9°C | -0.3°C | 9.3°C | 36 mm | 78% | 0.4 m/s | 2.7 |
| 1992 | 17.8°C | -1.1°C | 8.4°C | 21 mm | 71% | 0.5 m/s | 3.5 |
| 1991 | 18.8°C | -0.2°C | 9.3°C | 1 mm | 73% | 0.5 m/s | 3.1 |
| 1990 | 18.7°C | 0.3°C | 9.5°C | 16 mm | 77% | 0.5 m/s | 3.3 |
| 1989 | 16.6°C | -0.3°C | 8.2°C | 11 mm | 71% | 0.5 m/s | 3.1 |
| 1988 | 23.7°C | 0.9°C | 12.3°C | 9 mm | 72% | 0.5 m/s | 3 |
| 1987 | 18.5°C | -0.9°C | 8.8°C | 1 mm | 67% | 0.6 m/s | 3.8 |
| 1986 | 21.3°C | 0.8°C | 11.1°C | 7 mm | 72% | 0.5 m/s | 3.3 |
| 1985 | 16.5°C | 0.3°C | 8.4°C | 8 mm | 74% | 0.5 m/s | 2.9 |
| 1984 | 16.7°C | 0.0°C | 8.4°C | 9 mm | 74% | 0.5 m/s | 2.9 |
| 1983 | 16.7°C | 0.0°C | 8.4°C | 8 mm | 71% | 0.5 m/s | — |
| 1982 | 18.8°C | 1.0°C | 9.9°C | 13 mm | 76% | 0.5 m/s | — |
| 1981 | 20.2°C | 0.9°C | 10.6°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 19.3°C with lows near 0.7°C (mean 10°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 1.2°C. Daytime highs moved from 17.8°C to 19.1°C and overnight lows from 0.4°C to 1.6°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 19.3°C daytime highs and 0.7°C at night.
Yes — January is the coldest month of the year in Upper Siang, averaging 10°C.
For January in Upper Siang, pack warm layers and a jacket for chilly mornings, with typical highs of 19.3°C and lows of 0.7°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.
