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Rainfall · Uttar Pradesh

Rainfall in Bahraich

1,228 mmof rain in an average year, 2006–2025

Bahraich gets 84% of its rain from the monsoon, June to September, and July is its wettest month. In 2025 it got 1,310 mm, 7% above average (normal).

Julywettest month, 378 mm on average
2008wettest year, 1,688 mm
2015driest year, 884 mm
5months a year with 50 mm of rain or more

Month-wise rainfall in Bahraich

Average rain in each month, 2006–2025.

0100200300400JanJan: 17 mmFebFeb: 27 mmMarMar: 19 mmAprApr: 16 mmMayMay: 57 mmJunJun: 173 mmJulJul: 378 mmAugAug: 299 mmSepSep: 187 mmOctOct: 47 mmNovNov: 3 mmDecDec: 6 mm
MonthAverage rainShare of the year
January17 mm1%
February27 mm2%
March19 mm2%
April16 mm1%
May57 mm5%
June173 mm14%
July378 mm31%
August299 mm24%
September187 mm15%
October47 mm4%
November3 mm0%
December6 mm0%

Yearly rainfall in Bahraich since 2006

Lighter bars are dry years, 20% or more below average (2015), when wells and borewells are drawn hardest.

050010001500200020062006: 1,074 mm2007: 1,259 mm2008: 1,688 mm20092009: 1,063 mm2010: 1,070 mm2011: 1,344 mm20122012: 1,181 mm2013: 1,444 mm2014: 1,043 mm20152015: 884 mm2016: 1,184 mm2017: 1,175 mm20182018: 1,490 mm2019: 1,392 mm2020: 1,093 mm20212021: 1,496 mm2022: 1,158 mm2023: 1,034 mm20242024: 1,180 mm2025: 1,310 mm- - average 1,228 mm

What Bahraich'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 Bahraich sheds about 1,04,380 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 year2,08,760 L≈ 21 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 BahraichGroundwater level in BahraichPonds and lakes in Bahraich

Frequently asked questions

What is the average annual rainfall in Bahraich?

About 1,228 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 (1,688 mm) and the driest was 2015 (884 mm).

Which month gets the most rain in Bahraich?

July, with 378 mm in an average year, followed by August and September. November is the driest month (3 mm).

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

84% of a normal year's rain falls from June to September. 5 months average 50 mm or more.

How much did it rain in Bahraich in 2025?

1,310 mm, which is 7% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.

Is rainfall in Bahraich 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 Bahraich harvest?

A 100 m² (about 1,076 sq ft) concrete roof in Bahraich sheds about 1,04,380 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 Bahraich 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