Rainfall in Krishnagiri
Krishnagiri gets 49% of its rain from the monsoon, June to September, and October is its wettest month. In 2025 it got 847 mm, 10% below average (normal).
Month-wise rainfall in Krishnagiri
Average rain in each month, 2006–2025.
| Month | Average rain | Share of the year |
|---|---|---|
| January | 6 mm | 1% |
| February | 5 mm | 1% |
| March | 19 mm | 2% |
| April | 43 mm | 5% |
| May | 126 mm | 13% |
| June | 79 mm | 8% |
| July | 94 mm | 10% |
| August | 144 mm | 15% |
| September | 143 mm | 15% |
| October | 153 mm | 16% |
| November | 92 mm | 10% |
| December | 37 mm | 4% |
Yearly rainfall in Krishnagiri 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 13% more rain than the ten before.
What Krishnagiri'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 Krishnagiri sheds about 79,900 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 Krishnagiri?
About 940 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 (1,655 mm) and the driest was 2016 (592 mm).
Which month gets the most rain in Krishnagiri?
October, with 153 mm in an average year, followed by August and September. February is the driest month (5 mm).
How much of Krishnagiri's rain falls in the monsoon?
49% of a normal year's rain falls from June to September. 7 months average 50 mm or more.
How much did it rain in Krishnagiri in 2025?
847 mm, which is 10% below the 2006–2025 average, or "normal" in the India Meteorological Department's terms.
Is rainfall in Krishnagiri increasing or decreasing?
The last 10 years averaged 13% more rain than the 10 before them. Year-to-year swings are still bigger than that change.
How much rainwater can a house in Krishnagiri harvest?
A 100 m² (about 1,076 sq ft) concrete roof in Krishnagiri sheds about 79,900 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 Krishnagiri 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
- 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
- Virudhunagar