Skip to content
Rainfall · Tamil Nadu

Rainfall in Mayiladuthurai

1,143 mmof rain in an average year, 2006–2025

Mayiladuthurai gets 28% of its rain from the monsoon, June to September, and November is its wettest month. In 2025 it got 1,326 mm, 16% above average (normal).

Novemberwettest month, 282 mm on average
2021wettest year, 1,684 mm
2016driest year, 837 mm
8months a year with 50 mm of rain or more

Month-wise rainfall in Mayiladuthurai

Average rain in each month, 2006–2025.

0100200300JanJan: 33 mmFebFeb: 11 mmMarMar: 26 mmAprApr: 36 mmMayMay: 90 mmJunJun: 59 mmJulJul: 68 mmAugAug: 95 mmSepSep: 99 mmOctOct: 195 mmNovNov: 282 mmDecDec: 147 mm
MonthAverage rainShare of the year
January33 mm3%
February11 mm1%
March26 mm2%
April36 mm3%
May90 mm8%
June59 mm5%
July68 mm6%
August95 mm8%
September99 mm9%
October195 mm17%
November282 mm25%
December147 mm13%

Yearly rainfall in Mayiladuthurai since 2006

Lighter bars are dry years, 20% or more below average (2006, 2012, 2013, 2016), when wells and borewells are drawn hardest. The last ten years averaged 14% more rain than the ten before.

050010001500200020062006: 897 mm2007: 1,003 mm2008: 1,170 mm20092009: 1,026 mm2010: 1,319 mm2011: 1,016 mm20122012: 845 mm2013: 870 mm2014: 984 mm20152015: 1,554 mm2016: 837 mm2017: 1,277 mm20182018: 963 mm2019: 1,137 mm2020: 1,295 mm20212021: 1,684 mm2022: 1,250 mm2023: 1,131 mm20242024: 1,269 mm2025: 1,326 mm- - average 1,143 mm

What Mayiladuthurai's rain is worth to a building

Every millimetre of rain on a square metre of roof is a litre of water. A 100 m² roof in Mayiladuthurai sheds about 97,155 litres in an average year, most of it in a few wet months. Sent into a recharge pit, it refills the ground instead of flooding the street.

Your building: how much can you recharge?

Water you can put back each year1,94,310 L≈ 19 water tankers of 10,000 L

1 mm of rain on 1 m² is 1 litre. The surface factor allows for water lost to splash, evaporation and first-flush.

Rainwater harvesting cost in MayiladuthuraiGroundwater level in Mayiladuthurai

Frequently asked questions

What is the average annual rainfall in Mayiladuthurai?

About 1,143 mm a year, averaged over 2006–2025 from NASA POWER satellite and weather-model data for the centre of the district. The wettest year in that time was 2021 (1,684 mm) and the driest was 2016 (837 mm).

Which month gets the most rain in Mayiladuthurai?

November, with 282 mm in an average year, followed by October and December. February is the driest month (11 mm).

How much of Mayiladuthurai's rain falls in the monsoon?

28% of a normal year's rain falls from June to September. 8 months average 50 mm or more.

How much did it rain in Mayiladuthurai in 2025?

1,326 mm, which is 16% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.

Is rainfall in Mayiladuthurai increasing or decreasing?

The last 10 years averaged 14% more rain than the 10 before them. Year-to-year swings are still bigger than that change.

How much rainwater can a house in Mayiladuthurai harvest?

A 100 m² (about 1,076 sq ft) concrete roof in Mayiladuthurai sheds about 97,155 litres in an average year: area × rainfall × 0.85 for splash and evaporation. Sent into a recharge pit, that refills the ground under the house instead of running into the drain.

Rainfall from NASA POWER (bias-corrected satellite and weather-model rainfall) at the centre of Mayiladuthurai district. It reads close to, but not exactly the same as, India Meteorological Department rain-gauge totals, and rain varies within a district.

Rainfall in other districts of Tamil Nadu