Rainfall in Nicobar
Nicobar gets 38% of its rain from the monsoon, June to September, and November is its wettest month. In 2025 it got 1,969 mm, 0% above average (normal).
Month-wise rainfall in Nicobar
Average rain in each month, 2006–2025.
| Month | Average rain | Share of the year |
|---|---|---|
| January | 123 mm | 6% |
| February | 58 mm | 3% |
| March | 88 mm | 4% |
| April | 108 mm | 5% |
| May | 210 mm | 11% |
| June | 178 mm | 9% |
| July | 187 mm | 9% |
| August | 181 mm | 9% |
| September | 213 mm | 11% |
| October | 211 mm | 11% |
| November | 228 mm | 12% |
| December | 192 mm | 10% |
Yearly rainfall in Nicobar since 2006
Lighter bars are dry years, 20% or more below average (2019, 2023), when wells and borewells are drawn hardest.
What Nicobar'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 Nicobar sheds about 1,68,045 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 Nicobar?
About 1,977 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 (2,529 mm) and the driest was 2019 (1,426 mm).
Which month gets the most rain in Nicobar?
November, with 228 mm in an average year, followed by September and October. February is the driest month (58 mm).
How much of Nicobar's rain falls in the monsoon?
38% of a normal year's rain falls from June to September. 12 months average 50 mm or more.
How much did it rain in Nicobar in 2025?
1,969 mm, which is 0% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.
Is rainfall in Nicobar increasing or decreasing?
It has held roughly steady: the last 10 years averaged within 5% of the 10 before them. Year-to-year swings are much bigger than the trend.
How much rainwater can a house in Nicobar harvest?
A 100 m² (about 1,076 sq ft) concrete roof in Nicobar sheds about 1,68,045 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 Nicobar district. It reads close to, but not exactly the same as, India Meteorological Department rain-gauge totals, and rain varies within a district.