Climate & Weather Guide in Bangladesh

Climate zones, seasonal temperatures, rainfall patterns, and best travel times

Bangladesh has a humid tropical monsoon climate with very strong seasonal contrasts: a hot pre-monsoon period, a long wet monsoon, and a cooler, drier winter. National-average climate data from the World Bank Climate Change Knowledge Portal and the Climate Centre indicate mean temperatures around 26°C and annual rainfall commonly above 2,000 mm, with wetter conditions in the east and south and comparatively drier conditions in the west. The country is low-lying and deltaic, so flooding, waterlogging, cyclones, and high humidity are major features that affect day-to-day livability for residents and expats.

Summer Average

28-34°C

Winter Average

15-22°C

Climate Types

Tropical monsoon and Tropical wet and dry and Humid subtropical

Annual Rainfall

1000-2800 mm

Sunshine Hours

1,800-2,600 hrs/yr

Average Humidity

70-85%

Regional Climate Variations

South and Southeast Delta

This region includes the coastal and deltaic areas around Chattogram, Cox's Bazar, Khulna, Barisal, and the Sundarbans fringe. It is typically hotter, more humid, and wetter than the rest of the country, with frequent heavy monsoon rain and strong exposure to cyclones and storm surge. Annual rainfall is very high, especially in the southeast, and the climate feels sticky for much of the year. For residents, this area is lush and tropical, but seasonal flooding and coastal hazards are important practical concerns.

Summer:29-34°C

Winter:16-23°C

Very high rainfall

Hot, humid, and monsoon-drenched for long stretches; greenery is dense, but travel and outdoor routines are often disrupted by heavy rain and coastal weather risks.

Central River Plains and Dhaka Belt

The central plains, including Dhaka and surrounding districts, have Bangladesh's most familiar urban monsoon climate. Summers are very hot and humid, with a long wet season and a relatively short, milder winter. Rainfall is high but usually a bit less extreme than in the far east and southeast. Expats often find the climate challenging because heat, humidity, traffic pollution, and occasional waterlogging combine in the hottest months, while the cooler season is more comfortable for daily life.

Summer:30-35°C

Winter:15-21°C

High rainfall

Feels very warm to hot most of the year, with intense humidity and a strong monsoon rhythm; the winter season offers the best comfort window for residents.

Northwest Barind and Western Plains

The northwest, including Rajshahi, Rangpur, and the Barind Tract, is the comparatively drier part of Bangladesh. It still has a monsoon climate, but rainfall is lower than in the east and southeast, and the dry season feels more pronounced. Summer heat can be severe, while winter mornings can feel noticeably cooler than in the south. This zone is often the most comfortable for people who prefer somewhat less rain, though drought risk and hotter pre-monsoon conditions are important tradeoffs.

Summer:29-35°C

Winter:12-20°C

Moderate rainfall

Hot and seasonally dry relative to the rest of the country, with a clearer winter feel and less persistent wetness, but strong pre-monsoon heat can be harsh.

Bangladesh is a hot, humid, monsoon-dominated country with only modest regional variation in temperature but substantial variation in rainfall. For residents and expats, the most appealing period is the cooler, drier winter, while the biggest lifestyle challenges are heat, humidity, flooding, and cyclone risk in the monsoon and coastal zones.

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