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Rainfall · Chhattisgarh

Rainfall in Bastar

1,596 mmof rain in an average year, 2006–2025

Bastar gets 81% of its rain from the monsoon, June to September, and July is its wettest month. In 2025 it got 1,814 mm, 14% above average (normal).

Julywettest month, 398 mm on average
2019wettest year, 2,061 mm
2011driest year, 1,216 mm
7months a year with 50 mm of rain or more

Month-wise rainfall in Bastar

Average rain in each month, 2006–2025.

0200400600JanJan: 6 mmFebFeb: 6 mmMarMar: 26 mmAprApr: 55 mmMayMay: 89 mmJunJun: 219 mmJulJul: 398 mmAugAug: 389 mmSepSep: 287 mmOctOct: 88 mmNovNov: 21 mmDecDec: 13 mm
MonthAverage rainShare of the year
January6 mm0%
February6 mm0%
March26 mm2%
April55 mm3%
May89 mm6%
June219 mm14%
July398 mm25%
August389 mm24%
September287 mm18%
October88 mm6%
November21 mm1%
December13 mm1%

Yearly rainfall in Bastar since 2006

Lighter bars are dry years, 20% or more below average (2009, 2011), when wells and borewells are drawn hardest. The last ten years averaged 6% more rain than the ten before.

010002000300020062006: 1,626 mm2007: 1,310 mm2008: 1,428 mm20092009: 1,224 mm2010: 2,003 mm2011: 1,216 mm20122012: 1,801 mm2013: 1,549 mm2014: 1,549 mm20152015: 1,805 mm2016: 1,693 mm2017: 1,781 mm20182018: 1,495 mm2019: 2,061 mm2020: 1,540 mm20212021: 1,296 mm2022: 1,754 mm2023: 1,444 mm20242024: 1,535 mm2025: 1,814 mm- - average 1,596 mm

What Bastar'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 Bastar sheds about 1,35,660 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?

Water you can put back each year2,71,320 L≈ 27 water tankers of 10,000 L

1 mm of rain on 1 m² is 1 litre. The surface factor allows for water lost to splash, evaporation and first-flush.

Rainwater harvesting cost in BastarGroundwater level in BastarPonds and lakes in Bastar

Frequently asked questions

What is the average annual rainfall in Bastar?

About 1,596 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 2019 (2,061 mm) and the driest was 2011 (1,216 mm).

Which month gets the most rain in Bastar?

July, with 398 mm in an average year, followed by August and September. January is the driest month (6 mm).

How much of Bastar's rain falls in the monsoon?

81% of a normal year's rain falls from June to September. 7 months average 50 mm or more.

How much did it rain in Bastar in 2025?

1,814 mm, which is 14% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.

Is rainfall in Bastar 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 Bastar harvest?

A 100 m² (about 1,076 sq ft) concrete roof in Bastar sheds about 1,35,660 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 Bastar 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 Chhattisgarh