Skip to content
Rainfall · Uttar Pradesh

Rainfall in Basti

1,186 mmof rain in an average year, 2006–2025

Basti gets 85% of its rain from the monsoon, June to September, and July is its wettest month. In 2025 it got 1,221 mm, 3% above average (normal).

Julywettest month, 362 mm on average
2008wettest year, 1,663 mm
2015driest year, 806 mm
6months a year with 50 mm of rain or more

Month-wise rainfall in Basti

Average rain in each month, 2006–2025.

0100200300400JanJan: 14 mmFebFeb: 20 mmMarMar: 16 mmAprApr: 14 mmMayMay: 51 mmJunJun: 169 mmJulJul: 362 mmAugAug: 289 mmSepSep: 193 mmOctOct: 50 mmNovNov: 2 mmDecDec: 5 mm
MonthAverage rainShare of the year
January14 mm1%
February20 mm2%
March16 mm1%
April14 mm1%
May51 mm4%
June169 mm14%
July362 mm31%
August289 mm24%
September193 mm16%
October50 mm4%
November2 mm0%
December5 mm0%

Yearly rainfall in Basti since 2006

Lighter bars are dry years, 20% or more below average (2015), when wells and borewells are drawn hardest. The last ten years averaged 7% more rain than the ten before.

050010001500200020062006: 992 mm2007: 1,205 mm2008: 1,663 mm20092009: 999 mm2010: 1,044 mm2011: 1,222 mm20122012: 1,139 mm2013: 1,394 mm2014: 1,016 mm20152015: 806 mm2016: 1,134 mm2017: 1,169 mm20182018: 1,390 mm2019: 1,357 mm2020: 1,113 mm20212021: 1,514 mm2022: 1,069 mm2023: 988 mm20242024: 1,293 mm2025: 1,221 mm- - average 1,186 mm

What Basti'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 Basti sheds about 1,00,810 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 year2,01,620 L≈ 20 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 BastiGroundwater level in BastiPonds and lakes in Basti

Frequently asked questions

What is the average annual rainfall in Basti?

About 1,186 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 2008 (1,663 mm) and the driest was 2015 (806 mm).

Which month gets the most rain in Basti?

July, with 362 mm in an average year, followed by August and September. November is the driest month (2 mm).

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

85% of a normal year's rain falls from June to September. 6 months average 50 mm or more.

How much did it rain in Basti in 2025?

1,221 mm, which is 3% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.

Is rainfall in Basti increasing or decreasing?

The last 10 years averaged 7% more rain than the 10 before them. Year-to-year swings are still bigger than that change.

How much rainwater can a house in Basti harvest?

A 100 m² (about 1,076 sq ft) concrete roof in Basti sheds about 1,00,810 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 Basti 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 Uttar Pradesh