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Rainfall · Chhattisgarh

Rainfall in Korea

1,276 mmof rain in an average year, 2006–2025

Korea gets 83% of its rain from the monsoon, June to September, and August is its wettest month. In 2025 it got 1,467 mm, 15% above average (normal).

Augustwettest month, 335 mm on average
2013wettest year, 1,666 mm
2009driest year, 896 mm
5months a year with 50 mm of rain or more

Month-wise rainfall in Korea

Average rain in each month, 2006–2025.

0100200300400JanJan: 16 mmFebFeb: 21 mmMarMar: 25 mmAprApr: 26 mmMayMay: 44 mmJunJun: 175 mmJulJul: 329 mmAugAug: 335 mmSepSep: 221 mmOctOct: 64 mmNovNov: 9 mmDecDec: 11 mm
MonthAverage rainShare of the year
January16 mm1%
February21 mm2%
March25 mm2%
April26 mm2%
May44 mm3%
June175 mm14%
July329 mm26%
August335 mm26%
September221 mm17%
October64 mm5%
November9 mm1%
December11 mm1%

Yearly rainfall in Korea since 2006

Lighter bars are dry years, 20% or more below average (2009, 2010), when wells and borewells are drawn hardest. The last ten years averaged 9% more rain than the ten before.

050010001500200020062006: 1,052 mm2007: 1,231 mm2008: 1,256 mm20092009: 896 mm2010: 983 mm2011: 1,434 mm20122012: 1,246 mm2013: 1,666 mm2014: 1,323 mm20152015: 1,116 mm2016: 1,321 mm2017: 1,149 mm20182018: 1,059 mm2019: 1,384 mm2020: 1,487 mm20212021: 1,308 mm2022: 1,387 mm2023: 1,380 mm20242024: 1,384 mm2025: 1,467 mm- - average 1,276 mm

What Korea'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 Korea sheds about 1,08,460 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 year2,16,920 L≈ 22 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 KoreaGroundwater level in KoreaWater quality in Korea

Frequently asked questions

What is the average annual rainfall in Korea?

About 1,276 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 2013 (1,666 mm) and the driest was 2009 (896 mm).

Which month gets the most rain in Korea?

August, with 335 mm in an average year, followed by July and September. November is the driest month (9 mm).

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

83% of a normal year's rain falls from June to September. 5 months average 50 mm or more.

How much did it rain in Korea in 2025?

1,467 mm, which is 15% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.

Is rainfall in Korea increasing or decreasing?

The last 10 years averaged 9% more rain than the 10 before them. Year-to-year swings are still bigger than that change.

How much rainwater can a house in Korea harvest?

A 100 m² (about 1,076 sq ft) concrete roof in Korea sheds about 1,08,460 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 Korea 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