Sylhet Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Sylhet, Bangladesh. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.
Sylhet has a notably wet climate with abundant precipitation, recording 4584 mm (180 in) of rainfall per year. It does, however, have a distinct dry and rainy season during certain months. Have a look at our detailed charts below to see how precipitation varies throughout the year.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, June receives substantial rainfall, averaging 859 mm (34 in) of precipitation, recorded across 18 rainy days.
In contrast, the driest month, January brings less rainfall, with 13 mm (0.5 in) over a single rainy day.
June, the wettest month, has a maximum daytime temperature of 32°C (90°F). During the driest month January you can expect a temperature of 25°C (77°F). For more detailed insights into the city's temperatures, visit our Sylhet Temperature page.
Explore Sylhet's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Sylhet spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Bangladesh: City Comparison
The map below shows the annual precipitation across Bangladesh. You can also select the different months in case you are interested in a specific month.
heavy rainfall
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moderate
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Sylhet vs World: Rainfall Compared
Sylhet's average annual precipitation is 4584 mm (180 in). Let's compare this to some popular worldwide tourist destinations:
Seville, Spain, experiences 541 mm (21 in) of rainfall annually, with wet winters and dry summers typical of southern Spain.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Sylhet's weather, including sunshine hours, humidity levels, and temperature data, visit our Sylhet Climate page.
