Chennai weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Good
Best time to visit: January – February
What is the weather like in Chennai in December?
In December, Chennai is hot: daytime highs average 28 °C, and even at night it stays warm at around 22 °C. The sea averages 27.1 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 133 mm in total. The air is often humid and muggy. All in all, December is a good month for a holiday in Chennai.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 49 | 72 | 87 |
| Day | 29° | 28° | 28° |
| Night | 24° | 22° | 21° |
| Sea | 28° | 27° | 27° |
| Sun | 5 h | 6 h | 7 h |
| Rain days | 17 | 10 | 4 |
More details for December
- Daylight
- 11 h 22 min06:23 – 17:45
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 27 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 60 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+5:30Asia/Kolkata
How the score comes together
- Temperatureweight 50 %94 %
- Sunshineweight 20 %42 %
- Few rainy daysweight 30 %56 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Chennai in December: quick answers
Is Chennai hot in December?
Yes. In December, Chennai is hot: daytime highs average 28 °C and nights stay around 22 °C.
Can you swim in Chennai in December?
Yes. In December the sea averages 27.1 °C – lovely and warm for swimming.
Does it rain much in Chennai in December?
Rain is frequent, with about 10 rainy days and 133 mm in total.
Chennai month by month
The whole year in ChennaiAll destinations: IndiaWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences