December is one of the cooler months of the year in Mayiladuthurai, with average highs near 28.5°C and lows around 21.4°C (mean 25°C). It is a relatively wet time of year, averaging 115 mm of rainfall and 84% relative humidity across the period.
December is one of the cooler months of the year in Mayiladuthurai. Across 45 years of records, the warmest December in Mayiladuthurai was 2016 — when the month averaged 26.4°C — while the coldest were 1996 and 2004 at 24°C. Typical December days reach 28.5°C with nights near 21.4°C. The long-term December temperature trend is broadly flat.
December is a relatively wet time of year in Mayiladuthurai, averaging 115 mm of rainfall. The wettest December on record was 2020 with 370 mm, while the driest were 1995 and 2003 at 10 mm.
Relative humidity in Mayiladuthurai during December averages 84%. The most humid December was 2010 at 90%, and the least humid was 1995 at 71%.
December receives about 4.2 kWh/m²/day of solar energy in Mayiladuthurai. The sunniest December was 2003 at 4.8 kWh/m²/day, and the cloudiest were 1993, 2009 and 2010 at 3.5.
Average wind speed in Mayiladuthurai during December is 3 m/s. The windiest Decembers were 1990, 1993 and 2001 at 3.4 m/s, while the calmest was 1997 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.2°C | 24.7°C | 24.6°C | 25.1°C | 25.1°C | -0.1°C |
| Avg High | 29.0°C | 28.3°C | 28.2°C | 28.6°C | 28.2°C | -0.8°C |
| Avg Low | 21.4°C | 21.1°C | 21.1°C | 21.6°C | 22.0°C | +0.6°C |
| Avg Rain | 100 mm | 125 mm | 96 mm | 109 mm | 161 mm | +61 mm |
December temperatures in Mayiladuthurai have risen by about 0.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 16°C (1996) to a record high of 34.2°C (2016).
Rainfall in December is a relatively wet time of year, averaging 115 mm, with a wettest year of 370 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 Mayiladuthurai
December is one of the best times to visit Mayiladuthurai. Expect days averaging 28.5°C and nights around 21.4°C (mean 25°C) — cooler than Mayiladuthurai's yearly average — with higher rainfall (115 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 | 27.7°C | 24.2°C | 20.6°C | 29.5°C | 18.0°C | 61 mm | 86% | 2.8 m/s | — |
| 2024 | 28.7°C | 25.8°C | 22.9°C | 30.6°C | 20.4°C | 241 mm | 89% | 2.7 m/s | 3.8 |
| 2023 | 28.9°C | 25.9°C | 22.9°C | 31.1°C | 20.5°C | 82 mm | 88% | 3.2 m/s | 3.6 |
| 2022 | 28.2°C | 25.2°C | 22.2°C | 29.6°C | 19.5°C | 150 mm | 88% | 2.9 m/s | 3.9 |
| 2021 | 28.2°C | 24.9°C | 21.5°C | 30.8°C | 17.3°C | 63 mm | 87% | 2.6 m/s | 4.5 |
| 2020 🌧️ | 27.5°C | 24.8°C | 22.0°C | 28.8°C | 19.0°C | 370 mm | 89% | 3.2 m/s | 3.6 |
| 2019 | 28.5°C | 25.5°C | 22.4°C | 29.1°C | 20.5°C | 131 mm | 87% | 2.9 m/s | 4.1 |
| 2018 | 28.8°C | 25.1°C | 21.4°C | 30.3°C | 18.5°C | 46 mm | 86% | 2.6 m/s | 4.2 |
| 2017 | 28.2°C | 24.8°C | 21.5°C | 29.5°C | 18.6°C | 96 mm | 86% | 2.7 m/s | 4.3 |
| 2016 🔥 | 31.7°C | 26.4°C | 21.2°C | 34.2°C | 17.9°C | 67 mm | 72% | 3 m/s | 4.4 |
| 2015 | 27.9°C | 25.2°C | 22.4°C | 29.3°C | 19.9°C | 239 mm | 89% | 2.8 m/s | 3.8 |
| 2014 | 27.8°C | 24.8°C | 21.8°C | 29.2°C | 18.8°C | 82 mm | 88% | 3.1 m/s | 3.6 |
| 2013 | 28.8°C | 24.8°C | 20.7°C | 30.6°C | 17.1°C | 96 mm | 80% | 2.9 m/s | 4.4 |
| 2012 | 29.4°C | 25.7°C | 22.0°C | 31.2°C | 18.9°C | 40 mm | 83% | 3.3 m/s | 4.4 |
| 2011 | 28.1°C | 24.6°C | 21.1°C | 30.2°C | 17.2°C | 82 mm | 85% | 3 m/s | 4.2 |
| 2010 | 27.1°C | 24.3°C | 21.5°C | 29.7°C | 18.5°C | 210 mm | 90% | 2.7 m/s | 3.5 |
| 2009 | 27.9°C | 25.0°C | 22.1°C | 29.4°C | 18.9°C | 187 mm | 88% | 3 m/s | 3.5 |
| 2008 | 27.6°C | 24.2°C | 20.9°C | 29.4°C | 17.5°C | 63 mm | 87% | 2.7 m/s | 4.3 |
| 2007 | 27.8°C | 24.4°C | 21.1°C | 28.9°C | 16.4°C | 269 mm | 87% | 2.9 m/s | 4 |
| 2006 | 28.1°C | 24.7°C | 21.2°C | 29.0°C | 18.0°C | 52 mm | 83% | 3.2 m/s | 4.4 |
| 2005 | 27.3°C | 24.3°C | 21.2°C | 29.1°C | 18.0°C | 130 mm | 89% | 2.9 m/s | 4.1 |
| 2004 | 27.7°C | 24.0°C | 20.4°C | 28.6°C | 16.9°C | 34 mm | 85% | 3.1 m/s | 4.6 |
| 2003 | 29.0°C | 24.9°C | 20.9°C | 30.6°C | 18.6°C | 10 mm | 82% | 3 m/s | 4.8 |
| 2002 | 29.6°C | 25.2°C | 20.9°C | 31.1°C | 17.9°C | 52 mm | 79% | 3.1 m/s | 4.7 |
| 2001 | 28.5°C | 25.0°C | 21.5°C | 30.1°C | 18.5°C | 68 mm | 82% | 3.4 m/s | 4.1 |
| 2000 | 28.3°C | 24.5°C | 20.7°C | 29.8°C | 17.7°C | 96 mm | 83% | 3.2 m/s | 4.4 |
| 1999 | 28.0°C | 24.2°C | 20.4°C | 29.5°C | 17.1°C | 74 mm | 84% | 3.2 m/s | 4.4 |
| 1998 | 27.4°C | 24.4°C | 21.4°C | 29.7°C | 17.8°C | 254 mm | 87% | 3.2 m/s | 3.7 |
| 1997 | 28.6°C | 25.9°C | 23.2°C | 29.9°C | 20.5°C | 182 mm | 89% | 2.4 m/s | 3.9 |
| 1996 ❄️ | 27.6°C | 24.0°C | 20.4°C | 32.7°C | 16.0°C | 329 mm | 85% | 2.9 m/s | 3.9 |
| 1995 | 30.1°C | 25.5°C | 20.8°C | 31.1°C | 19.5°C | 10 mm | 71% | 3.3 m/s | 4.6 |
| 1994 | 28.6°C | 24.3°C | 19.9°C | 30.7°C | 17.8°C | 62 mm | 79% | 3.2 m/s | 4.6 |
| 1993 | 26.9°C | 24.1°C | 21.3°C | 28.5°C | 18.6°C | 231 mm | 89% | 3.4 m/s | 3.5 |
| 1992 | 27.6°C | 24.2°C | 20.8°C | 28.9°C | 18.1°C | 60 mm | 83% | 3.3 m/s | 4.3 |
| 1991 | 28.1°C | 24.5°C | 20.9°C | 30.4°C | 18.5°C | 35 mm | 84% | 2.8 m/s | 4.3 |
| 1990 | 30.1°C | 26.1°C | 22.2°C | 32.3°C | 19.4°C | 12 mm | 78% | 3.4 m/s | 4.3 |
| 1989 | 28.9°C | 25.0°C | 21.0°C | 30.8°C | 18.6°C | 64 mm | 81% | 3 m/s | 4.5 |
| 1988 | 30.8°C | 26.2°C | 21.5°C | 32.6°C | 18.5°C | 29 mm | 74% | 3.1 m/s | 4.7 |
| 1987 | 28.4°C | 25.3°C | 22.2°C | 31.6°C | 19.3°C | 226 mm | 86% | 3 m/s | 3.6 |
| 1986 | 29.8°C | 26.0°C | 22.2°C | 30.8°C | 18.9°C | 85 mm | 82% | 3 m/s | 4.2 |
| 1985 | 28.4°C | 24.8°C | 21.1°C | 29.6°C | 19.1°C | 56 mm | 84% | 2.8 m/s | 4.5 |
| 1984 | 29.4°C | 24.8°C | 20.2°C | 31.9°C | 17.4°C | 59 mm | 79% | 2.8 m/s | 4.7 |
| 1983 | 28.0°C | 25.1°C | 22.2°C | 29.3°C | 20.3°C | 276 mm | 87% | 3.1 m/s | — |
| 1982 | 29.6°C | 25.6°C | 21.7°C | 30.5°C | 20.1°C | 38 mm | 77% | 3.3 m/s | — |
| 1981 | 27.8°C | 24.3°C | 20.8°C | 29.1°C | 17.0°C | 68 mm | 86% | 2.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 28.5°C with lows near 21.4°C (mean 25°C), based on 45 years of NASA POWER data.
December averages 115 mm of rainfall in Mayiladuthurai, a relatively wet time of year. The wettest on record was 370 mm in 2020.
The hottest December reached 34.2°C in 2016. The coldest dipped to 16°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 21.2°C to 22°C while daytime highs eased from 28.6°C to 28.3°C, narrowing the gap between day and night.
December is one of the cooler months of the year in Mayiladuthurai and a relatively wet time of year, so plan for around 28.5°C daytime highs and 21.4°C at night.
Yes — December is the coldest month of the year in Mayiladuthurai, averaging 25°C.
For December in Mayiladuthurai, pack light layers you can adjust through the day, with typical highs of 28.5°C and lows of 21.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 84% — quite humid.
Average wind speed in December is 3 m/s. The windiest December on record averaged 3.4 m/s (1990).
The wettest December on record was 2020 with 370 mm. On average, December sees 115 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 Mayiladuthurai behaves each December, 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 December specifically, along with year-by-year records and how the month has changed over the decades.
