Rainfall in Wayanad
Wayanad gets 65% of its rain from the monsoon, June to September, and July is its wettest month. In 2025 it got 1,636 mm, 13% below average (normal).
Month-wise rainfall in Wayanad
Average rain in each month, 2006–2025.
| Month | Average rain | Share of the year |
|---|---|---|
| January | 12 mm | 1% |
| February | 6 mm | 0% |
| March | 34 mm | 2% |
| April | 66 mm | 4% |
| May | 182 mm | 10% |
| June | 331 mm | 18% |
| July | 392 mm | 21% |
| August | 278 mm | 15% |
| September | 211 mm | 11% |
| October | 203 mm | 11% |
| November | 120 mm | 6% |
| December | 38 mm | 2% |
Yearly rainfall in Wayanad since 2006
Lighter bars are dry years, 20% or more below average (2012, 2015, 2016, 2023), when wells and borewells are drawn hardest. The last ten years averaged 20% less rain than the ten before.
What Wayanad'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 Wayanad sheds about 1,59,120 litres in an average year, most of it in four monsoon 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 Wayanad?
About 1,872 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 2007 (2,625 mm) and the driest was 2016 (1,030 mm).
Which month gets the most rain in Wayanad?
July, with 392 mm in an average year, followed by June and August. February is the driest month (6 mm).
How much of Wayanad's rain falls in the monsoon?
65% of a normal year's rain falls from June to September. 8 months average 50 mm or more.
How much did it rain in Wayanad in 2025?
1,636 mm, which is 13% below the 2006–2025 average, or "normal" in the India Meteorological Department's terms.
Is rainfall in Wayanad increasing or decreasing?
The last 10 years averaged 20% less rain than the 10 before them. Year-to-year swings are still bigger than that change.
How much rainwater can a house in Wayanad harvest?
A 100 m² (about 1,076 sq ft) concrete roof in Wayanad sheds about 1,59,120 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 Wayanad district. It reads close to, but not exactly the same as, India Meteorological Department rain-gauge totals, and rain varies within a district.