January is one of the cooler months of the year in Tirunelveli, with average highs near 29.8°C and lows around 19.4°C (mean 24.6°C). It is one of the drier months, averaging 26 mm of rainfall and 78% relative humidity across the period.
January is one of the cooler months of the year in Tirunelveli. Across 45 years of records, the warmest January in Tirunelveli was 1987 — when the month averaged 26.2°C — while the coldest were 1988 and 1999 at 22.8°C. Typical January days reach 29.8°C with nights near 19.4°C. The long-term January temperature trend is broadly flat.
January is one of the drier months in Tirunelveli, averaging 26 mm of rainfall. The wettest January on record was 2021 with 431 mm, while the driest were 1983, 1993 and 1997, among others at 0 mm.
Relative humidity in Tirunelveli during January averages 78%. The most humid January was 2021 at 89%, and the least humid was 1987 at 66%.
January receives about 5.1 kWh/m²/day of solar energy in Tirunelveli. The sunniest Januarys were 2004 and 2012 at 5.6 kWh/m²/day, and the cloudiest was 2021 at 4.3.
Average wind speed in Tirunelveli during January is 2.7 m/s. The windiest January was 2007 at 3.2 m/s, while the calmest was 2018 at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.5°C | 24.4°C | 24.8°C | 24.7°C | 24.5°C | 0°C |
| Avg High | 29.8°C | 29.9°C | 30.0°C | 30.0°C | 28.9°C | -0.9°C |
| Avg Low | 19.3°C | 19.0°C | 19.5°C | 19.4°C | 20.0°C | +0.7°C |
| Avg Rain | 25 mm | 12 mm | 9 mm | 16 mm | 98 mm | +72 mm |
January temperatures in Tirunelveli have risen by about 0.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 13.8°C (1990) to a record high of 35.5°C (1983).
Rainfall in January is one of the drier months, averaging 26 mm, with a wettest year of 431 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
One of the best times to visit Tirunelveli
January is one of the best times to visit Tirunelveli. Expect days averaging 29.8°C and nights around 19.4°C (mean 24.6°C) — cooler than Tirunelveli's yearly average — with low rainfall (26 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.3°C | 24.8°C | 20.2°C | 31.7°C | 17.5°C | 26 mm | 80% | 3.1 m/s | 4.4 |
| 2024 | 28.2°C | 24.3°C | 20.4°C | 30.7°C | 17.2°C | 23 mm | 87% | 2.6 m/s | 4.7 |
| 2023 | 30.7°C | 24.8°C | 18.9°C | 32.5°C | 16.6°C | 16 mm | 74% | 2.7 m/s | 5.1 |
| 2022 | 28.9°C | 24.6°C | 20.4°C | 31.8°C | 18.7°C | 74 mm | 84% | 2.3 m/s | 5.2 |
| 2021 🌧️ | 27.0°C | 23.8°C | 20.6°C | 29.0°C | 16.9°C | 431 mm | 89% | 2.4 m/s | 4.3 |
| 2020 | 29.4°C | 24.5°C | 19.6°C | 32.6°C | 17.3°C | 17 mm | 83% | 2.3 m/s | 5.5 |
| 2019 | 32.6°C | 25.7°C | 18.8°C | 35.1°C | 16.1°C | 1 mm | 67% | 2.7 m/s | 5.4 |
| 2018 | 29.7°C | 24.5°C | 19.2°C | 32.7°C | 16.8°C | 4 mm | 77% | 2.2 m/s | 5 |
| 2017 | 31.9°C | 26.0°C | 20.0°C | 33.7°C | 17.3°C | 16 mm | 68% | 2.8 m/s | 4.9 |
| 2016 | 27.7°C | 23.3°C | 19.0°C | 29.6°C | 16.1°C | 1 mm | 86% | 2.4 m/s | 5.3 |
| 2015 | 28.6°C | 23.9°C | 19.1°C | 30.9°C | 16.0°C | 1 mm | 82% | 2.5 m/s | 5.4 |
| 2014 | 31.0°C | 25.5°C | 19.9°C | 33.0°C | 17.5°C | 36 mm | 74% | 3 m/s | 5 |
| 2013 | 31.8°C | 26.0°C | 20.2°C | 33.5°C | 17.7°C | 7 mm | 73% | 2.7 m/s | 5.4 |
| 2012 | 29.7°C | 24.2°C | 18.8°C | 31.2°C | 15.5°C | 13 mm | 78% | 2.4 m/s | 5.6 |
| 2011 | 27.8°C | 23.4°C | 19.0°C | 30.2°C | 15.8°C | 9 mm | 84% | 2.5 m/s | 4.7 |
| 2010 | 29.6°C | 24.6°C | 19.6°C | 31.8°C | 16.8°C | 71 mm | 80% | 2.7 m/s | 5.2 |
| 2009 | 30.2°C | 24.3°C | 18.4°C | 33.0°C | 15.5°C | 3 mm | 75% | 2.8 m/s | 5.4 |
| 2008 | 31.6°C | 25.5°C | 19.4°C | 34.7°C | 16.1°C | 0 mm | 72% | 2.8 m/s | 5.4 |
| 2007 | 29.0°C | 24.0°C | 19.1°C | 31.8°C | 16.2°C | 2 mm | 80% | 3.2 m/s | 5.1 |
| 2006 | 27.0°C | 22.9°C | 18.7°C | 28.7°C | 14.8°C | 32 mm | 86% | 2.7 m/s | 4.9 |
| 2005 | 30.9°C | 25.3°C | 19.7°C | 33.2°C | 16.2°C | 5 mm | 75% | 2.5 m/s | 5 |
| 2004 | 31.3°C | 25.7°C | 20.1°C | 34.1°C | 17.2°C | 1 mm | 74% | 2.8 m/s | 5.6 |
| 2003 | 29.6°C | 24.6°C | 19.6°C | 32.3°C | 17.3°C | 14 mm | 79% | 3 m/s | 5.2 |
| 2002 | 30.2°C | 25.0°C | 19.8°C | 33.4°C | 15.6°C | 2 mm | 77% | 2.5 m/s | 5.1 |
| 2001 | 30.1°C | 25.2°C | 20.3°C | 32.5°C | 17.8°C | 23 mm | 75% | 3 m/s | 4.7 |
| 2000 | 30.2°C | 25.0°C | 19.9°C | 32.7°C | 15.7°C | 3 mm | 76% | 3.1 m/s | 4.9 |
| 1999 | 27.2°C | 22.8°C | 18.4°C | 30.6°C | 14.7°C | 13 mm | 84% | 2.4 m/s | 5.4 |
| 1998 | 29.1°C | 24.5°C | 20.0°C | 31.8°C | 17.6°C | 3 mm | 83% | 2.6 m/s | 5 |
| 1997 | 30.8°C | 24.9°C | 18.9°C | 33.3°C | 15.3°C | 0 mm | 73% | 2.6 m/s | 5.4 |
| 1996 | 31.2°C | 25.1°C | 19.0°C | 33.2°C | 16.3°C | 36 mm | 71% | 3 m/s | 5.3 |
| 1995 | 31.4°C | 25.9°C | 20.4°C | 33.4°C | 17.1°C | 2 mm | 72% | 2.8 m/s | 5 |
| 1994 | 27.1°C | 23.0°C | 19.0°C | 29.8°C | 14.9°C | 32 mm | 86% | 2.6 m/s | 5.2 |
| 1993 | 28.9°C | 23.2°C | 17.6°C | 32.0°C | 15.4°C | 0 mm | 78% | 2.7 m/s | 5.1 |
| 1992 | 30.1°C | 24.1°C | 18.0°C | 33.2°C | 16.0°C | 19 mm | 73% | 3.1 m/s | 5.5 |
| 1991 | 31.8°C | 26.0°C | 20.3°C | 35.2°C | 16.9°C | 1 mm | 72% | 2.7 m/s | 5.1 |
| 1990 | 31.1°C | 24.6°C | 18.1°C | 33.2°C | 13.8°C | 14 mm | 71% | 2.8 m/s | 5.3 |
| 1989 | 32.2°C | 26.0°C | 19.8°C | 34.1°C | 16.4°C | 1 mm | 70% | 3.1 m/s | 4.8 |
| 1988 ❄️ | 27.1°C | 22.8°C | 18.5°C | 29.1°C | 15.6°C | 0 mm | 86% | 2.4 m/s | 5.4 |
| 1987 🔥 | 32.4°C | 26.2°C | 19.9°C | 34.4°C | 16.0°C | 3 mm | 66% | 3 m/s | 5.3 |
| 1986 | 30.7°C | 25.5°C | 20.4°C | 33.0°C | 17.8°C | 4 mm | 74% | 2.6 m/s | 5.1 |
| 1985 | 30.4°C | 25.3°C | 20.3°C | 32.9°C | 17.0°C | 68 mm | 76% | 2.6 m/s | 5.2 |
| 1984 | 26.7°C | 23.5°C | 20.3°C | 28.6°C | 16.8°C | 68 mm | 88% | 2.7 m/s | 4.5 |
| 1983 | 31.7°C | 25.2°C | 18.7°C | 35.5°C | 15.5°C | 0 mm | 70% | 2.9 m/s | — |
| 1982 | 28.1°C | 22.9°C | 17.7°C | 30.6°C | 15.5°C | 0 mm | 81% | 2.5 m/s | — |
| 1981 | 28.6°C | 23.5°C | 18.4°C | 31.0°C | 15.3°C | 83 mm | 79% | 2.3 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 29.8°C with lows near 19.4°C (mean 24.6°C), based on 45 years of NASA POWER data.
January averages 26 mm of rainfall in Tirunelveli, one of the drier months. The wettest on record was 431 mm in 2021.
The hottest January reached 35.5°C in 1983. The coldest dipped to 13.8°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.4°C — but days and nights have moved in opposite directions. Overnight lows rose from 19.1°C to 20.1°C while daytime highs eased from 29.1°C to 28.8°C, narrowing the gap between day and night.
January is one of the cooler months of the year in Tirunelveli and one of the drier months, so plan for around 29.8°C daytime highs and 19.4°C at night.
Not quite — January is the 2nd coolest month in Tirunelveli, averaging 24.6°C.
For January in Tirunelveli, pack light layers you can adjust through the day, with typical highs of 29.8°C and lows of 19.4°C.
Relative humidity in January averages 78% — quite humid.
Average wind speed in January is 2.7 m/s. The windiest January on record averaged 3.2 m/s (2007).
The wettest January on record was 2021 with 431 mm. On average, January sees 26 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 Tirunelveli 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.
