Last updated: April 14, 2025
The climate of Bangladesh is characterized by a diverse range of temperatures and precipitation patterns throughout the year. In January, temperatures drop to a chilly 6°C (43°F) in the Rangpur Division, while in April, they soar to a scorching 41°C (106°F) in Chittagong. Precipitation varies significantly, with a minimal 3 mm (0.1 in) recorded in Dhaka during January, contrasting sharply with July's deluge of 585 mm (23.0 in) in Sylhet. The humidity levels further illustrate Bangladesh's climatic extremes, presenting an average minimum of 31% in April in Khulna and peaking at 91% in July in Rangpur Division, creating a uniquely dynamic and challenging environment influenced by seasonal shifts.
Bangladesh showcases a diverse array of climate zones as classified by the Köppen-Geiger system. In the coastal region of Barisāl, the climate is predominantly Aw and Am, characterized by a tropical savanna and a monsoon-influenced climate. Chittagong mirrors this with Am and Aw classifications, making it a lush, vibrant area influenced by the ocean. The capital, Dhaka, experiences a temperate Aw climate, while Khulna shares tropical characteristics with both Aw and Am zones. The Mymensingh Division also enjoys a blend of Am and Aw climates. Moving inland, the Rajshahi Division is noted for its temperate Aw and Cwa climate, which offers a distinct seasonal variation. Rangpur Division showcases a pure Cwa climate, while the northeastern region of Sylhet features a combination of Am and Cwa, benefiting from rich rainfall and biodiversity. Each zone contributes uniquely to the natural beauty and agricultural richness of Bangladesh, making the country a climate mosaic worth exploring.
| Climate Zone | Description |
|---|---|
| Am | Tropical monsoon climate with heavy rainfall and high temperatures. |
| Aw | Tropical savanna climate with a dry season occurring in winter. |
| Cwa | Monsoon-influenced humid subtropical climate with dry winters and hot summers. |
Throughout the year, Bangladesh experiences a notable variation in temperatures, reflecting its diverse climatic zones. January ushers in cooler weather, with minimums dropping to 6°C (43°F) in Rangpur Division while Chittagong reaches a warm 32°C (90°F). As the months progress, February sees warmer days, peaking at 35°C (96°F) in Chittagong, and by March, temperatures escalate, culminating at a sizzling 39°C (103°F) in Chittagong. The peak heat occurs in April and May, where both months can touch 41°C (106°F), showcasing the onset of summer intensity. June marks the beginning of the monsoon season, bringing slightly cooler minimums at 22°C (72°F) while the maximum remains high at 40°C (104°F) in Rajshahi Division. The height of summer continues into July and August, with minimums around 24°C (75°F) in Chittagong. As September approaches, the maximum begins to taper off, reaching 37°C (99°F) in Sylhet. The transition into autumn brings cooler evenings in October and November, with minimums of 17°C (63°F) and 12°C (53°F), respectively, while daily highs start to decline into the low 30s. Finally, December closes the year with cool weather settling in, recording minimums of 7°C (45°F) in Rangpur Division, and a maximum of 32°C (89°F) in Chittagong, perfectly encapsulating Bangladesh's climatic rhythm.
Bangladesh experiences striking variability in its precipitation patterns, characterized by both the volume and frequency of rainfall across different months and regions. For instance, Dhaka sees its driest month in January, garnering a mere 3 mm (0.1 in) of rain, while Sylhet contrasts starkly with a staggering 585 mm (23.0 in) in July, highlighting the monsoon's intensity. This seasonal shift is further emphasized by the frequency of rainy days; while Rangpur Division can remain completely dry in January, Barisāl is drenched for nearly the entire month of August with 30 rainy days. Such patterns underline a diverse climatic landscape, where regions experience pronounced extremes that significantly impact agricultural practices and water management strategies throughout the year.
Bangladesh experiences a significant range of humidity levels throughout the year, reflecting the country's diverse climate conditions. In April, the humidity dips to a comparatively low 31% in Khulna, signaling the onset of warmer weather. However, this trend shifts dramatically by July, when the humidity peaks at 91% in the Rangpur Division, illustrating the intense moisture that accompanies the monsoon season. This fluctuation not only underscores the transitional nature of Bangladesh's climate but also highlights the challenges residents face as they navigate the extremes of heat and humidity throughout the year.
In July, Bangladesh experiences some of its highest ultraviolet (UV) radiation levels, with notable variations across different regions. The Mymensingh Division records an average daily maximum UV Index (UVI) of 13, while Chittagong sees an even more intense 14. This trend highlights the increasing risk posed by UV exposure during the summer months, emphasizing the importance of protective measures for residents and visitors alike. As climate patterns evolve, understanding these regional differences becomes crucial for public health and safety initiatives.
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Sunshine duration across Bangladesh showcases intriguing seasonal trends, reflecting the country's varied climate. Notably, Rangpur Division experiences 233 hours of sunshine in July, indicating a peak influenced by the monsoon season. In contrast, Barisāl basks in a remarkable 244 hours in January, laying dormant under winter skies, and then shines even brighter in May with 338 hours as summer approaches. Meanwhile, Dhaka enjoys a sunny March with 325 hours, setting the stage for the warmer months ahead. This variation highlights how different regions adapt to the ebb and flow of sunlight throughout the year, contributing to the diverse agricultural and cultural practices in Bangladesh.
The likelihood of sunny weather in Bangladesh varies dramatically by region and season, showcasing a striking contrast between different months and locations. For instance, in January, residents of Chittagong can expect a delightful 88% chance of sunny days, making it one of the sunniest times of the year in that coastal city. In stark opposition, the Rangpur Division experiences a mere 3% likelihood of sunshine in August, highlighting the intense monsoon season that typically blankets this northern region. This notable shift emphasizes the diverse climatic patterns across the country, where one area basks in winter sun while another grapples with the heavy rains of summer.
In Bangladesh's Rangpur Division, daylight hours exhibit a striking seasonal variation, showcasing a remarkable transition from winter to summer. In December, residents experience a more subdued 10 hours of daylight, inviting a cozy ambiance during the cooler months. However, as the long summer days approach in June, daylight extends significantly to a vibrant 13 hours, offering ample time for outdoor activities and agricultural pursuits. This shift highlights the rhythmic dance of nature that influences daily life in the region, reflecting the broader climatic patterns that characterize Bangladesh's diverse landscape.
Barisāl, Bangladesh, experiences a tropical climate marked by distinct seasonal variations. Temperatures soar from a mild 19°C (66°F) in January to a sweltering 39°C (102°F) in April, before settling into the more manageable range of 28°C (83°F) by October. While the dry months from January to March see minimal precipitation, the monsoon season from June to August unleashes heavy rains, peaking in June with an impressive 411 mm (16.2 in). Humidity levels, particularly in the summer months, can be a challenge, often reaching 82% in July and 83% in September, creating a muggy atmosphere. For more on the local weather patterns, check out the detailed Barisāl climate.
The climate in Chittagong, Bangladesh offers a warm tropical experience, characterized by hot summers and a monsoon season that brings significant rainfall. Temperatures peak in April and May, with sweltering highs of 41°C (106°F), while January cools down to a more comfortable average of 19°C (67°F). Humidity levels soar during the monsoon months of June through September, often exceeding 80%, accompanied by heavy rains that can reach up to 505 mm (19.9 in) in July. This vibrant climate pattern sets the stage for lush greenery and rich biodiversity, making it a captivating region for nature lovers. Learn more about the nuances of the weather by visiting Chittagong climate.
Dhaka, Bangladesh, experiences a tropical climate marked by hot, humid summers and cool, dry winters. January kicks off the year with mild temperatures, averaging around 18°C (65°F), while by April, the heat intensifies, reaching average highs of 39°C (103°F). The rainy season peaks from June to August, with precipitation soaring to 400 mm (15.7 in) in June, creating a lush, green landscape. Humidity levels significantly rise during these months, hovering around 83% in July, making the atmosphere feel even warmer. For a detailed overview of temperature and rainfall patterns throughout the year, visit Dhaka climate.
Khulna, Bangladesh experiences a tropical climate characterized by hot, humid summers and brief, mild winters. January begins the year with cooler temperatures, ranging from a crisp 7°C (45°F) to a warm 30°C (87°F), while February sees a gradual rise with averages of 21°C (70°F). By April, the heat intensifies, peaking in May with temperatures soaring to 40°C (105°F), yet this month also marks the onset of the monsoon season, bringing heavy rains that continue through June. The humidity, particularly from July to September, can be quite oppressive, often exceeding 85%, making the air feel even warmer. For more detailed information, visit Khulna climate.
The climate of Mymensingh Division in Bangladesh presents a vibrant tapestry of seasonal contrasts. Winter months, from January to February, offer cooler temperatures, peaking at around 30°C (85°F) in January, while April marks the arrival of sweltering heat, soaring up to 38°C (101°F). As the monsoon season unfolds in May through July, the region experiences heavy rainfall, with July witnessing an average precipitation of 459 mm (18.1 in) and humidity levels soaring to 91%. Post-monsoon, temperatures gradually decrease, making early winter a refreshing period with lower humidity and mild temperatures—ideal for exploration. For those seeking a detailed overview, visit Mymensingh Division climate.
The climate in Rajshahi Division, Bangladesh is marked by a distinct range of temperatures and seasonal shifts. January begins with cooler temperatures, averaging around 17°C (63°F), while the sweltering heat peaks in April and May, reaching up to 41°C (105°F). The monsoon season, from June to August, brings significant rainfall, with July seeing the highest precipitation at 344 mm (13.5 in) and humidity levels soaring to 90%. As the year progresses, conditions gradually cool, leading to a drier November with just a touch of rain. For a more detailed look, explore the Rajshahi Division climate.
The climate in Rangpur Division, Bangladesh, exhibits a striking transition from cool winters to sweltering summers. January begins with temperatures as low as 6°C (43°F), climbing to a searing 39°C (103°F) by April. The monsoon months from June to August bring significant rainfall—peaking at 442 mm (17.4 in) in July—coupled with high humidity levels approaching 91%. As the seasons shift, October and November offer a brief respite with cooler temperatures and less precipitation, making it a pleasant time to explore the region. For a deeper dive into these climatic patterns, visit Rangpur Division climate.
Sylhet, Bangladesh, boasts a diverse climate characterized by warm temperatures and substantial rainfall throughout the year. January begins with cooler temperatures ranging from a crisp 6°C (44°F) at night to a pleasant 30°C (86°F) during the day, while humidity levels hover around 76%. As spring unfolds in March and April, temperatures peak at an intense 39°C (103°F), accompanied by a dramatic increase in precipitation, with April alone receiving nearly 396 mm (15.6 in) of rain. The monsoon months of June to August are the most humid, with July seeing maximum heat and the highest rainfall of 585 mm (23.0 in). By October, conditions become gentler, offering a refreshing respite with comfortable averages of 27°C (82°F) and noticeable humidity around 89%. For a more detailed overview, visit Sylhet climate.
The climate of Bangladesh showcases a striking contrast between its scorching summers and mild winters, reflecting the diverse weather patterns across its regions. Temperatures can plunge to a chilly 6°C (43°F) in January within the Rangpur Division, while soaring to a blistering 41°C (106°F) in April in Chittagong. This vast temperature range is complemented by dramatic shifts in precipitation, with 3 mm (0.1 in) recorded in January in Dhaka, escalating to a staggering 585 mm (23.0 in) in July in Sylhet. Humidity levels reflect this variability, dipping to a dry 31% in April in Khulna before climbing to a humid 91% in July in Rangpur Division. These trends illustrate the dynamic nature of Bangladesh's climate, where extremes in temperature and precipitation entwine with high humidity to shape the country's rich environmental tapestry.