January is one of the cooler months of the year in Sitamarhi, with average highs near 27.8°C and lows around 6°C (mean 16.9°C). It is one of the drier months, averaging 9 mm of rainfall and 47% relative humidity across the period.
January is one of the cooler months of the year in Sitamarhi. Across 45 years of records, the warmest January in Sitamarhi was 1990 — when the month averaged 19.4°C — while the coldest was 2013 at 13.3°C. Typical January days reach 27.8°C with nights near 6°C. The long-term trend is cooling, about 0.2°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.1°C | 17.5°C | 16.8°C | 16.1°C | 17.0°C | -0.1°C |
| Avg High | 28.0°C | 29.0°C | 27.6°C | 27.0°C | 27.5°C | -0.5°C |
| Avg Low | 6.2°C | 6.1°C | 6.1°C | 5.1°C | 6.5°C | +0.3°C |
| Avg Rain | 13 mm | 9 mm | 12 mm | 6 mm | 3 mm | -10 mm |
January temperatures in Sitamarhi have fallen by about 0.3°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 0.8°C (2013) to a record high of 32.2°C (1990).
Rainfall in January is one of the drier months, averaging 9 mm, with a wettest year of 42 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.4°C per decade while lows fell 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Sitamarhi
January is a good time to visit Sitamarhi, with days averaging 27.8°C and nights around 6°C (mean 16.9°C, cooler than Sitamarhi's yearly average) and low rainfall. November and February are marginally more temperate, but January still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 28.4°C | 8.4°C | 18.4°C | 1 mm | 54% | 1.4 m/s | 2.4 |
| 2024 | 25.1°C | 7.1°C | 16.1°C | 0 mm | 55% | 1.4 m/s | 2 |
| 2023 | 30.7°C | 5.8°C | 18.2°C | 0 mm | 58% | 1.7 m/s | 2.5 |
| 2022 | 25.5°C | 6.4°C | 15.9°C | 5 mm | 77% | 1.8 m/s | 2.4 |
| 2021 | 29.5°C | 6.1°C | 17.8°C | 0 mm | 54% | 1.3 m/s | 2.4 |
| 2020 | 25.8°C | 5.3°C | 15.6°C | 13 mm | 66% | 1.7 m/s | 2.5 |
| 2019 | 28.6°C | 7.4°C | 18.0°C | 3 mm | 41% | 1.5 m/s | 3.2 |
| 2018 | 25.9°C | 5.6°C | 15.8°C | 0 mm | 44% | 1.5 m/s | 2.2 |
| 2017 | 29.9°C | 4.6°C | 17.3°C | 4 mm | 50% | 1.6 m/s | 3.3 |
| 2016 | 27.8°C | 5.8°C | 16.8°C | 7 mm | 42% | 1.4 m/s | 2.7 |
| 2015 | 27.1°C | 5.7°C | 16.4°C | 8 mm | 59% | 1.9 m/s | 2.5 |
| 2014 | 26.2°C | 6.1°C | 16.2°C | 11 mm | 63% | 1.9 m/s | 2.6 |
| 2013 ❄️ | 25.8°C | 0.8°C | 13.3°C | 7 mm | 53% | 2.2 m/s | 3.3 |
| 2012 | 25.6°C | 4.5°C | 15.1°C | 15 mm | 57% | 1.7 m/s | 3 |
| 2011 | 26.5°C | 4.6°C | 15.5°C | 3 mm | 53% | 1.6 m/s | 2.9 |
| 2010 | 26.5°C | 6.0°C | 16.3°C | 1 mm | 48% | 1.6 m/s | 2.4 |
| 2009 | 27.8°C | 8.4°C | 18.1°C | 1 mm | 57% | 1.4 m/s | 3.1 |
| 2008 | 27.2°C | 6.0°C | 16.6°C | 34 mm | 56% | 1.5 m/s | 3.3 |
| 2007 | 27.5°C | 5.0°C | 16.2°C | 0 mm | 45% | 1.3 m/s | 3.3 |
| 2006 | 27.9°C | 6.6°C | 17.2°C | 0 mm | 47% | 1.5 m/s | 3.3 |
| 2005 | 27.5°C | 7.9°C | 17.7°C | 34 mm | 54% | 1.4 m/s | 3.1 |
| 2004 | 26.5°C | 6.0°C | 16.2°C | 26 mm | 51% | 1.3 m/s | 2.6 |
| 2003 | 26.0°C | 4.5°C | 15.2°C | 6 mm | 43% | 1.5 m/s | 2.5 |
| 2002 | 27.4°C | 6.7°C | 17.0°C | 12 mm | 50% | 1.5 m/s | 3.3 |
| 2001 | 29.1°C | 4.8°C | 16.9°C | 4 mm | 37% | 1.6 m/s | 3.3 |
| 2000 | 28.9°C | 5.1°C | 17.0°C | 1 mm | 30% | 1.6 m/s | 3.3 |
| 1999 | 29.7°C | 7.6°C | 18.6°C | 1 mm | 40% | 1.6 m/s | 3.4 |
| 1998 | 27.2°C | 4.9°C | 16.0°C | 1 mm | 43% | 1.6 m/s | 3.2 |
| 1997 | 27.1°C | 5.4°C | 16.2°C | 9 mm | 35% | 1.7 m/s | 3.8 |
| 1996 | 26.6°C | 5.0°C | 15.8°C | 31 mm | 48% | 1.7 m/s | 3.7 |
| 1995 | 27.9°C | 6.4°C | 17.2°C | 11 mm | 35% | 1.7 m/s | 3.6 |
| 1994 | 30.2°C | 6.9°C | 18.5°C | 18 mm | 41% | 1.6 m/s | 3.7 |
| 1993 | 29.3°C | 5.5°C | 17.4°C | 7 mm | 36% | 1.8 m/s | 3.7 |
| 1992 | 29.5°C | 5.9°C | 17.7°C | 1 mm | 38% | 1.3 m/s | 4 |
| 1991 | 29.9°C | 6.4°C | 18.2°C | 8 mm | 38% | 1.4 m/s | 4 |
| 1990 🔥 | 32.2°C | 6.6°C | 19.4°C | 0 mm | 29% | 1.5 m/s | 3.9 |
| 1989 | 26.9°C | 4.8°C | 15.8°C | 14 mm | 44% | 1.7 m/s | 4.1 |
| 1988 | 27.9°C | 7.0°C | 17.5°C | 2 mm | 47% | 1.4 m/s | 4 |
| 1987 | 28.7°C | 4.9°C | 16.8°C | 4 mm | 42% | 1.4 m/s | 3.6 |
| 1986 | 27.3°C | 4.7°C | 16.0°C | 2 mm | 55% | 1.6 m/s | 3.7 |
| 1985 | 28.4°C | 6.5°C | 17.4°C | 14 mm | 45% | 1.5 m/s | 3.6 |
| 1984 | 28.8°C | 5.5°C | 17.2°C | 8 mm | 36% | 1.7 m/s | 3.8 |
| 1983 | 27.9°C | 7.2°C | 17.6°C | 0 mm | 34% | 1.4 m/s | — |
| 1982 🌧️ | 29.5°C | 7.3°C | 18.4°C | 42 mm | 48% | 1.6 m/s | — |
| 1981 | 26.7°C | 8.1°C | 17.4°C | 29 mm | 54% | 1.3 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 27.8°C with lows near 6°C (mean 16.9°C), based on 45 years of NASA POWER data.
January averages 9 mm of rainfall in Sitamarhi, one of the drier months. The wettest on record was 42 mm in 1982.
The hottest January reached 32.2°C in 1990. The coldest dipped to 0.8°C in 2013.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have fallen by about 0.3°C. Daytime highs moved from 28.3°C to 27.8°C and overnight lows from 6.9°C to 6.8°C over the same span.
January is one of the cooler months of the year in Sitamarhi and one of the drier months, so plan for around 27.8°C daytime highs and 6°C at night.
Yes — January is the coldest month of the year in Sitamarhi, averaging 16.9°C.
For January in Sitamarhi, pack warm layers and a jacket for chilly mornings, with typical highs of 27.8°C and lows of 6°C.
Relative humidity in January averages 47% — relatively dry.
Average wind speed in January is 1.6 m/s. The windiest January on record averaged 2.2 m/s (2013).
The wettest January on record was 1982 with 42 mm. On average, January sees 9 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 Sitamarhi 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.
