December is one of the cooler months of the year in Viluppuram, with average highs near 28.4°C and lows around 20.2°C (mean 24.3°C). It is a relatively wet time of year, averaging 114 mm of rainfall and 83% relative humidity across the period.
December is one of the cooler months of the year in Viluppuram. Across 45 years of records, the warmest December in Viluppuram was 2024 — when the month averaged 25.6°C — while the coldest was 1994 at 23.1°C. Typical December days reach 28.4°C with nights near 20.2°C. The long-term December temperature trend is broadly flat.
December is a relatively wet time of year in Viluppuram, averaging 114 mm of rainfall. The wettest December on record was 1996 with 372 mm, while the driest was 1995 at 7 mm.
Relative humidity in Viluppuram during December averages 83%. The most humid December was 2005 at 88%, and the least humid was 2016 at 73%.
December receives about 4.2 kWh/m²/day of solar energy in Viluppuram. 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 Viluppuram during December is 2.8 m/s. The windiest Decembers were 1990 and 1993 at 3.2 m/s, while the calmest was 1997 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.4°C | 23.9°C | 24.0°C | 24.6°C | 24.7°C | +0.3°C |
| Avg High | 28.7°C | 28.1°C | 28.2°C | 28.8°C | 28.4°C | -0.3°C |
| Avg Low | 20.2°C | 19.8°C | 19.8°C | 20.4°C | 21.0°C | +0.8°C |
| Avg Rain | 105 mm | 141 mm | 91 mm | 98 mm | 146 mm | +41 mm |
December temperatures in Viluppuram have risen by about 0.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 14.8°C (1981) to a record high of 32.7°C (2016).
Rainfall in December is a relatively wet time of year, averaging 114 mm, with a wettest year of 372 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°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 Viluppuram
December is one of the best times to visit Viluppuram. Expect days averaging 28.4°C and nights around 20.2°C (mean 24.3°C) — cooler than Viluppuram's yearly average — with higher rainfall (114 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 | 28.1°C | 23.8°C | 19.4°C | 30.1°C | 16.5°C | 52 mm | 83% | 2.8 m/s | — |
| 2024 🔥 | 28.9°C | 25.6°C | 22.2°C | 31.0°C | 18.8°C | 267 mm | 88% | 2.7 m/s | 3.8 |
| 2023 | 29.1°C | 25.4°C | 21.8°C | 32.1°C | 18.5°C | 81 mm | 86% | 3.1 m/s | 3.6 |
| 2022 | 28.3°C | 24.8°C | 21.3°C | 29.9°C | 18.8°C | 131 mm | 87% | 2.8 m/s | 3.9 |
| 2021 | 28.2°C | 24.3°C | 20.4°C | 30.9°C | 16.0°C | 65 mm | 85% | 2.5 m/s | 4.5 |
| 2020 | 27.5°C | 24.0°C | 20.6°C | 28.4°C | 17.3°C | 278 mm | 87% | 2.9 m/s | 3.6 |
| 2019 | 28.6°C | 25.0°C | 21.4°C | 29.1°C | 19.4°C | 100 mm | 86% | 2.7 m/s | 4.1 |
| 2018 | 29.5°C | 25.0°C | 20.5°C | 32.5°C | 18.3°C | 38 mm | 82% | 2.6 m/s | 4.2 |
| 2017 | 28.3°C | 24.2°C | 20.0°C | 29.8°C | 17.4°C | 71 mm | 84% | 2.6 m/s | 4.3 |
| 2016 | 30.9°C | 25.3°C | 19.6°C | 32.7°C | 16.3°C | 86 mm | 73% | 2.7 m/s | 4.4 |
| 2015 | 27.9°C | 24.4°C | 21.0°C | 29.3°C | 17.6°C | 229 mm | 88% | 2.6 m/s | 3.8 |
| 2014 | 28.2°C | 24.3°C | 20.5°C | 30.2°C | 16.7°C | 72 mm | 85% | 3 m/s | 3.6 |
| 2013 | 29.7°C | 24.6°C | 19.6°C | 32.4°C | 15.8°C | 49 mm | 76% | 2.9 m/s | 4.4 |
| 2012 | 29.3°C | 25.1°C | 21.0°C | 30.8°C | 18.2°C | 47 mm | 82% | 3 m/s | 4.4 |
| 2011 | 28.3°C | 24.1°C | 20.0°C | 30.4°C | 16.0°C | 104 mm | 83% | 2.9 m/s | 4.2 |
| 2010 | 27.1°C | 23.7°C | 20.4°C | 30.2°C | 16.2°C | 185 mm | 88% | 2.6 m/s | 3.5 |
| 2009 | 27.9°C | 24.5°C | 21.1°C | 29.2°C | 18.0°C | 142 mm | 86% | 2.9 m/s | 3.5 |
| 2008 | 27.7°C | 23.7°C | 19.7°C | 28.9°C | 15.3°C | 43 mm | 85% | 2.4 m/s | 4.3 |
| 2007 | 27.8°C | 24.0°C | 20.2°C | 29.3°C | 15.6°C | 225 mm | 85% | 2.7 m/s | 4 |
| 2006 | 28.0°C | 23.9°C | 19.7°C | 28.7°C | 16.3°C | 55 mm | 82% | 2.9 m/s | 4.4 |
| 2005 | 27.1°C | 23.7°C | 20.2°C | 29.2°C | 16.5°C | 173 mm | 88% | 3 m/s | 4.1 |
| 2004 | 28.1°C | 23.4°C | 18.8°C | 29.1°C | 15.5°C | 27 mm | 82% | 2.8 m/s | 4.6 |
| 2003 | 29.4°C | 24.6°C | 19.7°C | 32.1°C | 16.6°C | 15 mm | 79% | 2.8 m/s | 4.8 |
| 2002 | 29.2°C | 24.1°C | 19.1°C | 30.5°C | 16.5°C | 55 mm | 80% | 2.7 m/s | 4.7 |
| 2001 | 28.3°C | 24.1°C | 20.0°C | 29.9°C | 16.1°C | 92 mm | 81% | 3.1 m/s | 4.1 |
| 2000 | 28.7°C | 23.9°C | 19.2°C | 30.2°C | 15.6°C | 78 mm | 81% | 3 m/s | 4.4 |
| 1999 | 27.9°C | 23.4°C | 19.0°C | 29.2°C | 15.9°C | 88 mm | 83% | 2.9 m/s | 4.4 |
| 1998 | 27.6°C | 23.7°C | 19.9°C | 29.7°C | 16.0°C | 248 mm | 84% | 3.1 m/s | 3.7 |
| 1997 | 28.4°C | 25.4°C | 22.3°C | 29.8°C | 19.7°C | 254 mm | 88% | 2.3 m/s | 3.9 |
| 1996 🌧️ | 27.0°C | 23.3°C | 19.5°C | 31.1°C | 15.2°C | 372 mm | 85% | 2.8 m/s | 3.9 |
| 1995 | 29.6°C | 24.3°C | 19.0°C | 30.5°C | 16.8°C | 7 mm | 73% | 2.9 m/s | 4.6 |
| 1994 ❄️ | 27.9°C | 23.1°C | 18.2°C | 30.1°C | 15.3°C | 111 mm | 79% | 2.9 m/s | 4.6 |
| 1993 | 26.9°C | 23.4°C | 19.9°C | 28.4°C | 17.5°C | 232 mm | 88% | 3.2 m/s | 3.5 |
| 1992 | 27.9°C | 23.5°C | 19.2°C | 29.0°C | 16.0°C | 63 mm | 80% | 3.1 m/s | 4.3 |
| 1991 | 27.9°C | 23.8°C | 19.7°C | 30.4°C | 17.2°C | 23 mm | 83% | 2.6 m/s | 4.3 |
| 1990 | 29.4°C | 25.1°C | 20.8°C | 31.8°C | 17.9°C | 8 mm | 79% | 3.2 m/s | 4.3 |
| 1989 | 28.0°C | 23.9°C | 19.7°C | 29.8°C | 17.1°C | 75 mm | 83% | 2.7 m/s | 4.5 |
| 1988 | 29.6°C | 24.7°C | 19.9°C | 31.5°C | 16.6°C | 52 mm | 79% | 2.8 m/s | 4.7 |
| 1987 | 28.0°C | 24.5°C | 21.1°C | 30.7°C | 17.3°C | 226 mm | 85% | 3.1 m/s | 3.6 |
| 1986 | 29.5°C | 25.3°C | 21.1°C | 30.6°C | 17.7°C | 86 mm | 82% | 2.8 m/s | 4.2 |
| 1985 | 28.0°C | 23.9°C | 19.7°C | 29.1°C | 16.9°C | 71 mm | 85% | 2.6 m/s | 4.5 |
| 1984 | 29.5°C | 24.3°C | 19.1°C | 31.5°C | 15.9°C | 48 mm | 78% | 2.6 m/s | 4.7 |
| 1983 | 28.0°C | 24.6°C | 21.3°C | 29.3°C | 18.4°C | 274 mm | 86% | 3 m/s | — |
| 1982 | 29.5°C | 24.9°C | 20.3°C | 30.7°C | 17.9°C | 25 mm | 77% | 3 m/s | — |
| 1981 | 27.8°C | 23.8°C | 19.8°C | 29.4°C | 14.8°C | 87 mm | 85% | 2.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 28.4°C with lows near 20.2°C (mean 24.3°C), based on 45 years of NASA POWER data.
December averages 114 mm of rainfall in Viluppuram, a relatively wet time of year. The wettest on record was 372 mm in 1996.
The hottest December reached 32.7°C in 2016. The coldest dipped to 14.8°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.5°C — but days and nights have moved in opposite directions. Overnight lows rose from 20°C to 21°C while daytime highs eased from 28.6°C to 28.5°C, narrowing the gap between day and night.
December is one of the cooler months of the year in Viluppuram and a relatively wet time of year, so plan for around 28.4°C daytime highs and 20.2°C at night.
Yes — December is the coldest month of the year in Viluppuram, averaging 24.3°C.
For December in Viluppuram, pack light layers you can adjust through the day, with typical highs of 28.4°C and lows of 20.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 83% — quite humid.
Average wind speed in December is 2.8 m/s. The windiest December on record averaged 3.2 m/s (1990).
The wettest December on record was 1996 with 372 mm. On average, December sees 114 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 Viluppuram 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.
