Active Monsoon Brings Five Days of Widespread Rainfall Across Bangladesh

Bangladesh is bracing for a sustained period of wet weather, with the Bangladesh Meteorological Department (BMD) forecasting light to moderate rain and thunder showers across most parts of the country over the next five days. The meteorological agency has warned that active monsoon conditions could also trigger heavy to very heavy downpours in several regions, alongside gusty winds.

According to the official 120-hour outlook issued by the BMD, the monsoon trough currently extends through Rajasthan, Madhya Pradesh, Uttar Pradesh, Bihar, West Bengal, and the northern part of Bangladesh, reaching as far as Assam. An extension of this trough stretches across the North Bay of Bengal, where monsoon activity remains moderate to strong.

Five-Day Weather Outlook Breakdown

• First 24 Hours (Day 1): Most places across all eight administrative divisions—Rongpur, Rajshahi, Mymensingh, Dhaka, Khulna, Barishal, Chattogram, and Sylhet—are expected to experience light to moderate rain or thunder showers accompanied by temporary gusty winds. Moderate to heavy rainfall is anticipated in isolated areas. Both day and night temperatures are likely to drop slightly nationwide.

• Second 24 Hours (Day 2): Similar weather conditions will persist, with widespread precipitation continuing across the country. Heavy localized downpours remain a risk, whilst day and night temperatures may decline further by a minor margin.

• Third 24 Hours (Day 3): Rainfall patterns will remain largely unchanged across most divisions. Although moderate to heavy falls will continue in places, overall day and night temperatures are expected to stay nearly unchanged.

• Fourth 24 Hours (Day 4): Rain or thunder showers with squally winds will continue across most regions. Heavy precipitation is predicted in select localities, accompanied by a slight rise in both day and night temperatures.

• Fifth 24 Hours (Day 5): A slight shift in distribution is expected. Rain and thunder showers will remain widespread across many places in Rongpur, Rajshahi, Mymensingh, and Sylhet, while occurring at a few places in Dhaka, Khulna, Barishal, and Chattogram. Temperatures are projected to see a minor increase.

Broader Context and Seasonal Impact

The South Asian summer monsoon typically spans from June through September in Bangladesh, bringing the vast majority of the nation’s annual rainfall. During this period, the active convergence of moist air from the Bay of Bengal frequently leads to prolonged spells of heavy rain.

While monsoon precipitation is vital for the agrarian economy—replenishing groundwater levels and sustaining paddy cultivation—extended spells of intense downpours often pose severe urban and rural challenges. Low-lying agricultural regions face heightened risks of flash flooding and waterlogging, whilst major metropolitan hubs, particularly Dhaka and Chattogram, routinely experience disruption to transportation and daily commerce due to inundated roadways.

The Met Office indicated that towards the tail end of the extended five-day period, total rainfall intensity across the southern and central districts is expected to gradually taper off.