January is one of the cooler months of the year in East Siang, with average highs near 26.8°C and lows around 9°C (mean 17.9°C). It is one of the drier months, averaging 19 mm of rainfall and 64% relative humidity across the period.
January is one of the cooler months of the year in East Siang. Across 45 years of records, the warmest January in East Siang was 2015 — when the month averaged 20.9°C — while the coldest was 1984 at 15.5°C. Typical January days reach 26.8°C with nights near 9°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 | 17.7°C | 17.4°C | 17.7°C | 18.5°C | 18.3°C | +0.6°C |
| Avg High | 26.7°C | 26.8°C | 26.3°C | 27.8°C | 26.4°C | -0.3°C |
| Avg Low | 8.7°C | 8.0°C | 9.2°C | 9.3°C | 10.2°C | +1.5°C |
| Avg Rain | 15 mm | 22 mm | 23 mm | 12 mm | 27 mm | +12 mm |
January temperatures in East Siang have risen by about 1°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 6.9°C (1999) to a record high of 30.1°C (2015).
Rainfall in January is one of the drier months, averaging 19 mm, with a wettest year of 52 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit East Siang
January is a good time to visit East Siang, with days averaging 26.8°C and nights around 9°C (mean 17.9°C, cooler than East Siang's yearly average) and low rainfall. November and December are marginally more temperate, but January still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 25.1°C | 11.3°C | 18.2°C | 34 mm | 71% | 0.6 m/s | 3.2 |
| 2024 | 27.1°C | 10.2°C | 18.6°C | 10 mm | 65% | 0.7 m/s | 3.4 |
| 2023 | 26.9°C | 9.5°C | 18.2°C | 7 mm | 65% | 0.6 m/s | 3 |
| 2022 | 26.4°C | 9.4°C | 17.9°C | 40 mm | 69% | 0.6 m/s | 3.1 |
| 2021 | 26.1°C | 11.1°C | 18.6°C | 19 mm | 71% | 0.6 m/s | 2.9 |
| 2020 🌧️ | 26.7°C | 9.6°C | 18.1°C | 52 mm | 74% | 0.6 m/s | 2.7 |
| 2019 | 28.1°C | 9.3°C | 18.7°C | 17 mm | 61% | 0.7 m/s | 3.7 |
| 2018 | 26.3°C | 10.2°C | 18.2°C | 21 mm | 72% | 0.6 m/s | 3 |
| 2017 | 29.9°C | 11.1°C | 20.5°C | 3 mm | 60% | 0.7 m/s | 3.8 |
| 2016 | 28.6°C | 10.5°C | 19.5°C | 22 mm | 71% | 0.6 m/s | 3.3 |
| 2015 🔥 | 30.1°C | 11.7°C | 20.9°C | 9 mm | 69% | 0.5 m/s | 3.5 |
| 2014 | 27.5°C | 8.9°C | 18.2°C | 3 mm | 69% | 0.6 m/s | 3.6 |
| 2013 | 28.6°C | 7.3°C | 18.0°C | 6 mm | 66% | 0.6 m/s | 3.5 |
| 2012 | 26.0°C | 7.6°C | 16.8°C | 19 mm | 67% | 0.6 m/s | 2.5 |
| 2011 | 25.4°C | 6.9°C | 16.2°C | 18 mm | 69% | 0.7 m/s | 2.8 |
| 2010 | 27.0°C | 9.3°C | 18.1°C | 0 mm | 58% | 0.7 m/s | 4 |
| 2009 | 25.6°C | 10.4°C | 18.0°C | 41 mm | 71% | 0.6 m/s | 3 |
| 2008 | 25.6°C | 8.7°C | 17.2°C | 42 mm | 67% | 0.6 m/s | 2.5 |
| 2007 | 27.8°C | 8.9°C | 18.3°C | 3 mm | 61% | 0.7 m/s | 3 |
| 2006 | 26.1°C | 10.2°C | 18.2°C | 2 mm | 57% | 0.7 m/s | 3.5 |
| 2005 | 25.7°C | 9.1°C | 17.4°C | 30 mm | 65% | 0.7 m/s | 3 |
| 2004 | 29.9°C | 8.9°C | 19.4°C | 7 mm | 63% | 0.7 m/s | 3.1 |
| 2003 | 25.0°C | 8.8°C | 16.9°C | 22 mm | 60% | 0.7 m/s | 3.4 |
| 2002 | 26.3°C | 8.8°C | 17.6°C | 38 mm | 63% | 0.6 m/s | 2.9 |
| 2001 | 24.3°C | 8.6°C | 16.5°C | 10 mm | 58% | 0.7 m/s | 2.9 |
| 2000 | 26.5°C | 9.2°C | 17.8°C | 38 mm | 58% | 0.7 m/s | 2.9 |
| 1999 | 26.5°C | 6.9°C | 16.7°C | 4 mm | 49% | 0.8 m/s | 3.7 |
| 1998 | 26.0°C | 8.1°C | 17.1°C | 19 mm | 60% | 0.7 m/s | 3 |
| 1997 | 25.0°C | 7.0°C | 16.0°C | 13 mm | 58% | 0.7 m/s | 3.3 |
| 1996 | 25.3°C | 8.2°C | 16.7°C | 30 mm | 67% | 0.7 m/s | 3 |
| 1995 | 30.0°C | 8.6°C | 19.3°C | 21 mm | 56% | 0.7 m/s | 3 |
| 1994 | 27.9°C | 9.1°C | 18.5°C | 26 mm | 58% | 0.7 m/s | 3.4 |
| 1993 | 24.3°C | 7.7°C | 16.0°C | 50 mm | 70% | 0.6 m/s | 2.7 |
| 1992 | 27.7°C | 7.6°C | 17.6°C | 27 mm | 64% | 0.7 m/s | 3.5 |
| 1991 | 27.1°C | 7.9°C | 17.5°C | 3 mm | 63% | 0.7 m/s | 3.1 |
| 1990 | 28.6°C | 9.0°C | 18.8°C | 24 mm | 67% | 0.7 m/s | 3.3 |
| 1989 | 26.4°C | 8.2°C | 17.3°C | 14 mm | 64% | 0.7 m/s | 3.1 |
| 1988 | 29.1°C | 9.9°C | 19.5°C | 14 mm | 60% | 0.7 m/s | 3 |
| 1987 | 29.7°C | 8.4°C | 19.0°C | 1 mm | 59% | 0.7 m/s | 3.8 |
| 1986 | 25.8°C | 8.4°C | 17.1°C | 14 mm | 62% | 0.7 m/s | 3.3 |
| 1985 | 26.6°C | 8.3°C | 17.5°C | 9 mm | 63% | 0.7 m/s | 2.9 |
| 1984 ❄️ | 24.0°C | 7.0°C | 15.5°C | 23 mm | 62% | 0.7 m/s | 2.9 |
| 1983 | 24.8°C | 8.2°C | 16.5°C | 14 mm | 59% | 0.7 m/s | — |
| 1982 | 28.6°C | 10.6°C | 19.6°C | 13 mm | 67% | 0.7 m/s | — |
| 1981 | 25.0°C | 9.7°C | 17.3°C | 32 mm | 67% | 0.6 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 26.8°C with lows near 9°C (mean 17.9°C), based on 45 years of NASA POWER data.
January averages 19 mm of rainfall in East Siang, one of the drier months. The wettest on record was 52 mm in 2020.
The hottest January reached 30.1°C in 2015. The coldest dipped to 6.9°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1°C. Daytime highs moved from 25.8°C to 26.3°C and overnight lows from 8.8°C to 10.3°C over the same span.
January is one of the cooler months of the year in East Siang and one of the drier months, so plan for around 26.8°C daytime highs and 9°C at night.
Yes — January is the coldest month of the year in East Siang, averaging 17.9°C.
For January in East Siang, pack light layers you can adjust through the day, with typical highs of 26.8°C and lows of 9°C.
Relative humidity in January averages 64% — moderately humid.
Average wind speed in January is 0.7 m/s. The windiest January on record averaged 0.8 m/s (1999).
The wettest January on record was 2020 with 52 mm. On average, January sees 19 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 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.
