Rainfall in Virudhunagar
Virudhunagar gets 29% of its rain from the monsoon, June to September, and November is its wettest month. In 2025 it got 955 mm, 3% below average (normal).
Month-wise rainfall in Virudhunagar
Average rain in each month, 2006–2025.
| Month | Average rain | Share of the year |
|---|---|---|
| January | 27 mm | 3% |
| February | 9 mm | 1% |
| March | 30 mm | 3% |
| April | 53 mm | 5% |
| May | 88 mm | 9% |
| June | 50 mm | 5% |
| July | 59 mm | 6% |
| August | 87 mm | 9% |
| September | 93 mm | 9% |
| October | 193 mm | 20% |
| November | 209 mm | 21% |
| December | 84 mm | 9% |
Yearly rainfall in Virudhunagar since 2006
Lighter bars are dry years, 20% or more below average (2009, 2011, 2012, 2013, 2016, 2018), when wells and borewells are drawn hardest. The last ten years averaged 11% more rain than the ten before.
What Virudhunagar'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 Virudhunagar sheds about 83,470 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 Virudhunagar?
About 982 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 (1,609 mm) and the driest was 2016 (565 mm).
Which month gets the most rain in Virudhunagar?
November, with 209 mm in an average year, followed by October and September. February is the driest month (9 mm).
How much of Virudhunagar's rain falls in the monsoon?
29% of a normal year's rain falls from June to September. 9 months average 50 mm or more.
How much did it rain in Virudhunagar in 2025?
955 mm, which is 3% below the 2006–2025 average, or "normal" in the India Meteorological Department's terms.
Is rainfall in Virudhunagar increasing or decreasing?
The last 10 years averaged 11% more rain than the 10 before them. Year-to-year swings are still bigger than that change.
How much rainwater can a house in Virudhunagar harvest?
A 100 m² (about 1,076 sq ft) concrete roof in Virudhunagar sheds about 83,470 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 Virudhunagar 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
- Ariyalur
- Chengalpattu
- Chennai
- Coimbatore
- Cuddalore
- Dharmapuri
- Dindigul
- Erode
- Kallakurichchi
- Kancheepuram
- Kanniyakumari
- Karur
- Krishnagiri
- Madurai
- Mayiladuthurai
- Nagapattinam
- Namakkal
- Perambalur
- Pudukkottai
- Ramanathapuram
- Ranipet
- Salem
- Sivagangai
- Tenkasi
- Thanjavur
- The Nilgiris
- Theni
- Thiruvarur
- Thoothukudi
- Tiruchirappalli
- Tirunelveli
- Tirupathur
- Tiruppur
- Tiruvallur
- Tiruvannamalai
- Vellore
- Villupuram