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Rainfall · Tamil Nadu

Rainfall in Kanniyakumari

1,180 mmof rain in an average year, 2006–2025

Kanniyakumari gets 31% of its rain from the monsoon, June to September, and November is its wettest month. In 2025 it got 1,124 mm, 5% below average (normal).

Novemberwettest month, 235 mm on average
2006wettest year, 2,104 mm
2016driest year, 581 mm
9months a year with 50 mm of rain or more

Month-wise rainfall in Kanniyakumari

Average rain in each month, 2006–2025.

0100200300JanJan: 39 mmFebFeb: 10 mmMarMar: 43 mmAprApr: 69 mmMayMay: 122 mmJunJun: 97 mmJulJul: 79 mmAugAug: 77 mmSepSep: 108 mmOctOct: 218 mmNovNov: 235 mmDecDec: 84 mm
MonthAverage rainShare of the year
January39 mm3%
February10 mm1%
March43 mm4%
April69 mm6%
May122 mm10%
June97 mm8%
July79 mm7%
August77 mm7%
September108 mm9%
October218 mm18%
November235 mm20%
December84 mm7%

Yearly rainfall in Kanniyakumari since 2006

Lighter bars are dry years, 20% or more below average (2011, 2012, 2016, 2018), when wells and borewells are drawn hardest. The last ten years averaged 10% less rain than the ten before.

010002000300020062006: 2,104 mm2007: 1,316 mm2008: 1,371 mm20092009: 1,054 mm2010: 1,183 mm2011: 871 mm20122012: 779 mm2013: 1,028 mm2014: 1,266 mm20152015: 1,442 mm2016: 581 mm2017: 1,018 mm20182018: 936 mm2019: 1,177 mm2020: 1,019 mm20212021: 1,929 mm2022: 977 mm2023: 1,349 mm20242024: 1,081 mm2025: 1,124 mm- - average 1,180 mm

What Kanniyakumari'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 Kanniyakumari sheds about 1,00,300 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 year2,00,600 L≈ 20 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 KanniyakumariGroundwater level in KanniyakumariPonds and lakes in Kanniyakumari

Frequently asked questions

What is the average annual rainfall in Kanniyakumari?

About 1,180 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 2006 (2,104 mm) and the driest was 2016 (581 mm).

Which month gets the most rain in Kanniyakumari?

November, with 235 mm in an average year, followed by October and May. February is the driest month (10 mm).

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

31% of a normal year's rain falls from June to September. 9 months average 50 mm or more.

How much did it rain in Kanniyakumari in 2025?

1,124 mm, which is 5% below the 2006–2025 average, or "normal" in the India Meteorological Department's terms.

Is rainfall in Kanniyakumari increasing or decreasing?

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

How much rainwater can a house in Kanniyakumari harvest?

A 100 m² (about 1,076 sq ft) concrete roof in Kanniyakumari sheds about 1,00,300 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 Kanniyakumari 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