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Rainfall · Tamil Nadu

Rainfall in Ranipet

1,115 mmof rain in an average year, 2006–2025

Ranipet gets 44% of its rain from the monsoon, June to September, and November is its wettest month. In 2025 it got 1,154 mm, 3% above average (normal).

Novemberwettest month, 222 mm on average
2015wettest year, 1,667 mm
2016driest year, 718 mm
8months a year with 50 mm of rain or more

Month-wise rainfall in Ranipet

Average rain in each month, 2006–2025.

0100200300JanJan: 16 mmFebFeb: 6 mmMarMar: 18 mmAprApr: 23 mmMayMay: 65 mmJunJun: 87 mmJulJul: 114 mmAugAug: 146 mmSepSep: 143 mmOctOct: 175 mmNovNov: 222 mmDecDec: 98 mm
MonthAverage rainShare of the year
January16 mm1%
February6 mm1%
March18 mm2%
April23 mm2%
May65 mm6%
June87 mm8%
July114 mm10%
August146 mm13%
September143 mm13%
October175 mm16%
November222 mm20%
December98 mm9%

Yearly rainfall in Ranipet since 2006

Lighter bars are dry years, 20% or more below average (2012, 2014, 2016, 2018), when wells and borewells are drawn hardest. The last ten years averaged 5% more rain than the ten before.

050010001500200020062006: 974 mm2007: 1,128 mm2008: 1,249 mm20092009: 974 mm2010: 1,170 mm2011: 1,046 mm20122012: 888 mm2013: 901 mm2014: 861 mm20152015: 1,667 mm2016: 718 mm2017: 1,135 mm20182018: 719 mm2019: 1,012 mm2020: 1,352 mm20212021: 1,552 mm2022: 1,218 mm2023: 1,215 mm20242024: 1,364 mm2025: 1,154 mm- - average 1,115 mm

What Ranipet'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 Ranipet sheds about 94,775 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 year1,89,550 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 RanipetGroundwater level in Ranipet

Frequently asked questions

What is the average annual rainfall in Ranipet?

About 1,115 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 2015 (1,667 mm) and the driest was 2016 (718 mm).

Which month gets the most rain in Ranipet?

November, with 222 mm in an average year, followed by October and August. February is the driest month (6 mm).

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

44% of a normal year's rain falls from June to September. 8 months average 50 mm or more.

How much did it rain in Ranipet in 2025?

1,154 mm, which is 3% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.

Is rainfall in Ranipet increasing or decreasing?

The last 10 years averaged 5% more rain than the 10 before them. Year-to-year swings are still bigger than that change.

How much rainwater can a house in Ranipet harvest?

A 100 m² (about 1,076 sq ft) concrete roof in Ranipet sheds about 94,775 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 Ranipet 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