Rainfall in Golaghat
Golaghat gets 66% of its rain from the monsoon, June to September, and July is its wettest month. In 2025 it got 1,902 mm, 6% above average (normal).
Month-wise rainfall in Golaghat
Average rain in each month, 2006–2025.
| Month | Average rain | Share of the year |
|---|---|---|
| January | 12 mm | 1% |
| February | 27 mm | 2% |
| March | 56 mm | 3% |
| April | 146 mm | 8% |
| May | 242 mm | 13% |
| June | 330 mm | 18% |
| July | 336 mm | 19% |
| August | 286 mm | 16% |
| September | 228 mm | 13% |
| October | 107 mm | 6% |
| November | 19 mm | 1% |
| December | 10 mm | 1% |
Yearly rainfall in Golaghat since 2006
Lighter bars are dry years, 20% or more below average (2006), when wells and borewells are drawn hardest.
What Golaghat'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 Golaghat sheds about 1,52,915 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?
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 Golaghat?
About 1,799 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 2017 (2,242 mm) and the driest was 2006 (1,338 mm).
Which month gets the most rain in Golaghat?
July, with 336 mm in an average year, followed by June and August. December is the driest month (10 mm).
How much of Golaghat's rain falls in the monsoon?
66% of a normal year's rain falls from June to September. 8 months average 50 mm or more.
How much did it rain in Golaghat in 2025?
1,902 mm, which is 6% above the 2006–2025 average, or "normal" in the India Meteorological Department's terms.
Is rainfall in Golaghat 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 Golaghat harvest?
A 100 m² (about 1,076 sq ft) concrete roof in Golaghat sheds about 1,52,915 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 Golaghat district. It reads close to, but not exactly the same as, India Meteorological Department rain-gauge totals, and rain varies within a district.