January is one of the cooler months of the year in Thanjavur, with average highs near 29.5°C and lows around 20.5°C (mean 25°C). It is one of the drier months, averaging 25 mm of rainfall and 79% relative humidity across the period.
January is one of the cooler months of the year in Thanjavur. Across 45 years of records, the warmest January in Thanjavur was 1991 — when the month averaged 26.6°C — while the coldest was 1997 at 23.5°C. Typical January days reach 29.5°C with nights near 20.5°C. The long-term January temperature trend is broadly flat.
January is one of the drier months in Thanjavur, averaging 25 mm of rainfall. The wettest January on record was 2021 with 189 mm, while the driest was 2019 at 1 mm.
Relative humidity in Thanjavur during January averages 79%. The most humid January was 2021 at 89%, and the least humid was 1996 at 68%.
January receives about 4.8 kWh/m²/day of solar energy in Thanjavur. The sunniest Januarys were 2008, 2012 and 2020, among others at 5.3 kWh/m²/day, and the cloudiest was 2021 at 4.
Average wind speed in Thanjavur during January is 2.8 m/s. The windiest January was 2014 at 3.3 m/s, while the calmest were 2012, 2016 and 2020 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.2°C | 24.9°C | 25.2°C | 24.9°C | 25.0°C | -0.2°C |
| Avg High | 29.9°C | 29.6°C | 29.7°C | 29.4°C | 28.7°C | -1.2°C |
| Avg Low | 20.5°C | 20.1°C | 20.6°C | 20.3°C | 21.2°C | +0.7°C |
| Avg Rain | 31 mm | 15 mm | 14 mm | 18 mm | 63 mm | +32 mm |
January temperatures in Thanjavur have stayed relatively stable across the record.
January has ranged from a record low of 15.6°C (1997) to a record high of 35.2°C (1983).
Rainfall in January is one of the drier months, averaging 25 mm, with a wettest year of 189 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
One of the best times to visit Thanjavur
January is one of the best times to visit Thanjavur. Expect days averaging 29.5°C and nights around 20.5°C (mean 25°C) — cooler than Thanjavur's yearly average — with low rainfall (25 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 | 27.9°C | 24.4°C | 20.9°C | 29.7°C | 19.1°C | 26 mm | 85% | 3 m/s | 4.3 |
| 2024 | 29.2°C | 25.4°C | 21.7°C | 31.3°C | 19.1°C | 88 mm | 83% | 2.7 m/s | 4.6 |
| 2023 | 29.2°C | 24.6°C | 20.1°C | 30.7°C | 17.2°C | 10 mm | 78% | 2.8 m/s | 4.9 |
| 2022 | 28.9°C | 25.2°C | 21.6°C | 31.0°C | 18.9°C | 53 mm | 85% | 2.4 m/s | 4.8 |
| 2021 🌧️ | 27.8°C | 24.8°C | 21.8°C | 29.6°C | 19.0°C | 189 mm | 89% | 2.7 m/s | 4 |
| 2020 | 29.4°C | 25.3°C | 21.1°C | 31.3°C | 18.1°C | 13 mm | 83% | 2.3 m/s | 5.3 |
| 2019 | 30.0°C | 24.7°C | 19.4°C | 32.4°C | 17.6°C | 1 mm | 75% | 2.8 m/s | 5.2 |
| 2018 | 28.8°C | 24.1°C | 19.4°C | 30.0°C | 17.3°C | 23 mm | 81% | 2.6 m/s | 5 |
| 2017 | 31.2°C | 25.9°C | 20.7°C | 32.6°C | 18.1°C | 77 mm | 71% | 3.1 m/s | 4.8 |
| 2016 | 28.3°C | 24.2°C | 20.1°C | 29.9°C | 18.0°C | 2 mm | 84% | 2.3 m/s | 5.1 |
| 2015 | 29.4°C | 24.8°C | 20.2°C | 30.8°C | 17.3°C | 8 mm | 80% | 2.7 m/s | 5 |
| 2014 | 30.6°C | 25.9°C | 21.1°C | 32.3°C | 20.0°C | 8 mm | 72% | 3.3 m/s | 4.5 |
| 2013 | 31.3°C | 26.2°C | 21.1°C | 32.4°C | 19.0°C | 7 mm | 74% | 3 m/s | 5.1 |
| 2012 | 28.9°C | 24.4°C | 19.9°C | 30.1°C | 17.0°C | 10 mm | 80% | 2.3 m/s | 5.3 |
| 2011 | 27.6°C | 24.1°C | 20.6°C | 28.8°C | 17.7°C | 25 mm | 86% | 3 m/s | 4.6 |
| 2010 | 28.2°C | 24.5°C | 20.7°C | 29.4°C | 17.4°C | 19 mm | 85% | 2.6 m/s | 5 |
| 2009 | 28.2°C | 24.2°C | 20.1°C | 30.2°C | 18.7°C | 19 mm | 82% | 2.6 m/s | 5.2 |
| 2008 | 28.2°C | 24.0°C | 19.7°C | 31.7°C | 17.1°C | 30 mm | 84% | 2.4 m/s | 5.3 |
| 2007 | 30.1°C | 25.3°C | 20.5°C | 31.8°C | 18.1°C | 3 mm | 76% | 3 m/s | 4.9 |
| 2006 | 27.6°C | 23.7°C | 19.8°C | 29.7°C | 16.3°C | 21 mm | 85% | 2.6 m/s | 4.9 |
| 2005 | 30.0°C | 25.3°C | 20.7°C | 32.0°C | 17.6°C | 7 mm | 79% | 2.6 m/s | 5 |
| 2004 | 31.1°C | 25.8°C | 20.6°C | 33.1°C | 17.8°C | 8 mm | 74% | 2.8 m/s | 5.3 |
| 2003 | 31.5°C | 26.3°C | 21.1°C | 33.6°C | 19.2°C | 3 mm | 71% | 3.2 m/s | 4.9 |
| 2002 | 30.7°C | 26.0°C | 21.3°C | 34.3°C | 17.9°C | 28 mm | 76% | 2.8 m/s | 4.7 |
| 2001 | 29.7°C | 25.4°C | 21.0°C | 32.3°C | 18.2°C | 4 mm | 78% | 3 m/s | 4.6 |
| 2000 | 30.2°C | 25.6°C | 20.9°C | 32.3°C | 17.8°C | 14 mm | 78% | 3 m/s | 4.7 |
| 1999 | 28.4°C | 23.9°C | 19.4°C | 30.5°C | 17.2°C | 5 mm | 82% | 2.9 m/s | 5.1 |
| 1998 | 29.1°C | 25.2°C | 21.3°C | 31.0°C | 18.5°C | 3 mm | 82% | 2.5 m/s | 4.7 |
| 1997 ❄️ | 27.8°C | 23.5°C | 19.3°C | 29.6°C | 15.6°C | 26 mm | 83% | 2.4 m/s | 4.8 |
| 1996 | 31.5°C | 26.0°C | 20.5°C | 33.2°C | 19.2°C | 3 mm | 68% | 3.1 m/s | 4.6 |
| 1995 | 30.2°C | 25.6°C | 20.9°C | 32.6°C | 17.6°C | 32 mm | 76% | 3.1 m/s | 4.4 |
| 1994 | 28.0°C | 24.3°C | 20.5°C | 29.6°C | 17.5°C | 6 mm | 85% | 2.6 m/s | 4.8 |
| 1993 | 29.6°C | 24.6°C | 19.5°C | 32.0°C | 17.6°C | 3 mm | 76% | 2.6 m/s | 4.8 |
| 1992 | 29.3°C | 24.3°C | 19.3°C | 31.9°C | 16.5°C | 3 mm | 74% | 3 m/s | 5 |
| 1991 🔥 | 32.0°C | 26.6°C | 21.2°C | 34.4°C | 18.4°C | 4 mm | 72% | 2.9 m/s | 4.7 |
| 1990 | 30.0°C | 24.7°C | 19.3°C | 32.4°C | 15.7°C | 62 mm | 75% | 2.6 m/s | 4.9 |
| 1989 | 32.0°C | 26.3°C | 20.6°C | 33.2°C | 17.7°C | 7 mm | 71% | 3.1 m/s | 4.2 |
| 1988 | 29.6°C | 24.9°C | 20.1°C | 31.9°C | 17.8°C | 2 mm | 77% | 2.8 m/s | 4.9 |
| 1987 | 31.0°C | 25.9°C | 20.8°C | 32.6°C | 18.4°C | 7 mm | 71% | 3.1 m/s | 4.9 |
| 1986 | 28.8°C | 24.9°C | 21.1°C | 31.3°C | 18.5°C | 57 mm | 81% | 3 m/s | 4.2 |
| 1985 | 29.4°C | 25.2°C | 20.9°C | 31.6°C | 18.4°C | 100 mm | 81% | 2.5 m/s | 4.6 |
| 1984 | 27.9°C | 24.6°C | 21.4°C | 29.0°C | 19.4°C | 64 mm | 86% | 2.5 m/s | 4.1 |
| 1983 | 31.6°C | 25.9°C | 20.2°C | 35.2°C | 18.0°C | 1 mm | 69% | 2.8 m/s | — |
| 1982 | 28.4°C | 23.9°C | 19.3°C | 30.6°C | 18.2°C | 2 mm | 80% | 2.4 m/s | — |
| 1981 | 30.6°C | 25.3°C | 20.1°C | 32.3°C | 17.8°C | 38 mm | 74% | 2.7 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 29.5°C with lows near 20.5°C (mean 25°C), based on 45 years of NASA POWER data.
January averages 25 mm of rainfall in Thanjavur, one of the drier months. The wettest on record was 189 mm in 2021.
The hottest January reached 35.2°C in 1983. The coldest dipped to 15.6°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have fallen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 20.4°C to 21.2°C while daytime highs eased from 29.6°C to 28.6°C, narrowing the gap between day and night.
January is one of the cooler months of the year in Thanjavur and one of the drier months, so plan for around 29.5°C daytime highs and 20.5°C at night.
Not quite — January is the 2nd coolest month in Thanjavur, averaging 25°C.
For January in Thanjavur, pack light layers you can adjust through the day, with typical highs of 29.5°C and lows of 20.5°C.
Relative humidity in January averages 79% — quite humid.
Average wind speed in January is 2.8 m/s. The windiest January on record averaged 3.3 m/s (2014).
The wettest January on record was 2021 with 189 mm. On average, January sees 25 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 Thanjavur 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.
