Rainfall in Mandya
Mandya gets 53% of its rain from the monsoon, June to September, and August is its wettest month. In 2025 it got 746 mm, 20% below average (deficient).
Month-wise rainfall in Mandya
Average rain in each month, 2006–2025.
| Month | Average rain | Share of the year |
|---|---|---|
| January | 4 mm | 0% |
| February | 4 mm | 0% |
| March | 21 mm | 2% |
| April | 54 mm | 6% |
| May | 138 mm | 15% |
| June | 96 mm | 10% |
| July | 114 mm | 12% |
| August | 144 mm | 15% |
| September | 135 mm | 15% |
| October | 130 mm | 14% |
| November | 65 mm | 7% |
| December | 23 mm | 2% |
Yearly rainfall in Mandya since 2006
Lighter bars are dry years, 20% or more below average (2012, 2016, 2018, 2023), when wells and borewells are drawn hardest. The last ten years averaged 6% more rain than the ten before.
What Mandya'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 Mandya sheds about 79,050 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?
1 mm of rain on 1 m² is 1 litre. The surface factor allows for water lost to splash, evaporation and first-flush.
Frequently asked questions
What is the average annual rainfall in Mandya?
About 930 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 2022 (1,714 mm) and the driest was 2016 (550 mm).
Which month gets the most rain in Mandya?
August, with 144 mm in an average year, followed by May and September. January is the driest month (4 mm).
How much of Mandya's rain falls in the monsoon?
53% of a normal year's rain falls from June to September. 8 months average 50 mm or more.
How much did it rain in Mandya in 2025?
746 mm, which is 20% below the 2006–2025 average, or "deficient" in the India Meteorological Department's terms.
Is rainfall in Mandya increasing or decreasing?
The last 10 years averaged 6% more rain than the 10 before them. Year-to-year swings are still bigger than that change.
How much rainwater can a house in Mandya harvest?
A 100 m² (about 1,076 sq ft) concrete roof in Mandya sheds about 79,050 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 Mandya district. It reads close to, but not exactly the same as, India Meteorological Department rain-gauge totals, and rain varies within a district.