Tamil Nadu weather in December
December is a fair month to visit Tamil Nadu: highs of 27°C (81°F) and about 126 mm (5.0 in) of rain on average. Nights average 22°C (71°F) and cloud cover 51% (NASA POWER, 2001–2025 averages). The sea averages 27°C (81°F). It is the 5th wettest month of the year and the coolest. Compared with November, it is cooler and drier; January brings highs of 28°C (82°F) and 16 mm (0.6 in) of rain.
Figures are long-term averages for Chennai, the largest city in Tamil Nadu. See below for other places.
Is December a good time to visit Tamil Nadu?
fair month Weather score 69/100.
December is a fair month in Tamil Nadu. The weather is usually best in Jan–Mar.
Does it rain a lot in Tamil Nadu in December?
Some rain is normal: about 126 mm (5.0 in) falls in an average December. It is the 5th wettest month of the year.
How warm is Tamil Nadu in December?
Days average 27°C (81°F) and nights 22°C (71°F).
Tamil Nadu weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 28°C (82°F) | 21°C (69°F) | 16 mm | 36% | 27°C (81°F) | best |
| February | 30°C (87°F) | 21°C (70°F) | 6 mm | 29% | 29°C (83°F) | best |
| March | 34°C (93°F) | 23°C (74°F) | 15 mm | 30% | 30°C (85°F) | best |
| April | 35°C (96°F) | 26°C (78°F) | 26 mm | 37% | 31°C (88°F) | fair |
| May | 36°C (97°F) | 27°C (81°F) | 55 mm | 54% | 31°C (88°F) | fair |
| June | 35°C (94°F) | 27°C (80°F) | 68 mm | 77% | 31°C (87°F) | fair |
| July | 34°C (93°F) | 26°C (78°F) | 108 mm | 83% | 30°C (85°F) | least pleasant |
| August | 33°C (91°F) | 25°C (77°F) | 132 mm | 81% | 30°C (86°F) | least pleasant |
| September | 32°C (89°F) | 25°C (77°F) | 145 mm | 72% | 30°C (87°F) | fair |
| October | 30°C (86°F) | 25°C (76°F) | 264 mm | 63% | 30°C (86°F) | least pleasant |
| November | 28°C (83°F) | 23°C (74°F) | 292 mm | 61% | 29°C (84°F) | least pleasant |
| December | 27°C (81°F) | 22°C (71°F) | 126 mm | 51% | 27°C (81°F) | fair |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months
Weather across Tamil Nadu in December
Weather can differ a lot within Tamil Nadu: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Chennai | 27°C (81°F) | 22°C (71°F) | 126 mm | fair |
| Coimbatore | 27°C (81°F) | 17°C (62°F) | 28 mm | best |
| Kallakurichi | 28°C (82°F) | 18°C (64°F) | 61 mm | fair |
| Madurai | 28°C (83°F) | 19°C (66°F) | 60 mm | fair |
| Tirunelveli | 27°C (81°F) | 20°C (68°F) | 61 mm | best |
| Tiruchirappalli | 29°C (83°F) | 19°C (66°F) | 67 mm | fair |
| Tiruppur | 29°C (85°F) | 18°C (65°F) | 33 mm | best |
| Salem | 29°C (84°F) | 17°C (63°F) | 46 mm | best |
| Erode | 29°C (84°F) | 17°C (63°F) | 29 mm | best |
| Vellore | 27°C (81°F) | 18°C (64°F) | 80 mm | fair |
| Ambattur | 27°C (81°F) | 22°C (71°F) | 126 mm | fair |