Weather in Chattogram

Stay up to date with the current weather in Chattogram. Here you will find the latest data, forecasts, and useful weather charts for planning your day.

The climate in Chattogram, located in Bangladesh, is characterized as tropical monsoon. This means the city experiences high temperatures throughout most of the year and has distinct wet and dry seasons. The weather here is generally warm, with average monthly temperatures ranging from a pleasant 20°C in January to a hot 29°C in April and May.

Two main seasons can be distinguished in Chattogram. The dry season usually lasts from about November to April. During this period, especially from December to February, rainfall is minimal (0 mm), and days are mostly sunny, with 1-2 rainy days per month. Air temperature at this time is more moderate, although it remains warm, gradually rising towards April. Starting from May until October comes the rainy season, or monsoon period. It brings a significant increase in rainfall, peaking from June to September (11-16 mm per month), when it rains almost daily (26-29 rainy days). Humidity at this time also rises significantly, and temperatures remain consistently high, averaging around 28°C.

The climate in Chattogram is characterized by a distinct warm season and a mild winter, which is typical for the tropical monsoon climate of Bangladesh. The annual temperature range is quite stable, without sharp extreme fluctuations. The hottest months are usually April and May, when the average temperature holds at 28.9°C, and maximum values can reach 32.6°C. The coolest month is considered to be January with an average temperature of about 20.1°C, while night lows drop to 15.7°C, and day highs reach a pleasant 24.6°C.

The summer period, which tentatively lasts from March to October, brings real tropical heat to Chattogram. Temperatures at this time are consistently high: daily highs often exceed 30°C, and nights remain very warm, with temperatures rarely dropping below 25-26°C, especially from May to September. This period also coincides with the monsoon season, so high temperatures are accompanied by significant humidity, especially from June to August, when the number of rainy days is maximal. The difference between day and night temperatures during the peak monsoon season (June-August) is minimal, amounting to only 3-4°C, creating a feeling of constant mugginess.

The winter months, from November to February, offer much more comfortable weather conditions. November is still quite warm with an average temperature of 24.9°C, but by December (average 21.6°C) and January (average 20.1°C) it becomes noticeably cooler, especially at night. Minimum temperatures in January can drop to 15.7°C, creating a pleasant freshness. During the day, the sun warms the air to a comfortable 24-27°C. In these dry months (especially from December to February), a more significant daily temperature amplitude is observed, reaching 8-10°C, which makes evenings and mornings noticeably cooler compared to the hot days.

In Chattogram, there is a clearly defined seasonality of precipitation, characteristic of a monsoon climate. The year is clearly divided into a dry season, which lasts roughly from November to March, and a wet season, the peak of which falls on the summer months, from June to September, with May and October being transitional periods.

The dry season in Chattogram is characterized by minimal rainfall. The driest months are January, February, and December, when the average rainfall is 0 mm, and there are only 1-2 rainy days. November and March are also very dry, with insignificant rainfall (about 1 mm) and just a few rainy days. During this period, the weather is predominantly clear and sunny.

The wet season brings abundant rains to Chattogram. Starting from April, the amount of precipitation and rainy days begins to gradually increase, reaching significant figures in May (6 mm of precipitation and 17 rainy days). The highest amount of precipitation falls in June (16 mm), July (15 mm), and August (15 mm). During these months, it rains very frequently, practically daily – June and July count 28 rainy days each, and August has a whole 29. Precipitation during this period usually comes in the form of heavy downpours. September also remains a very rainy month with 11 mm of precipitation and 26 rainy days, after which the intensity of rains begins to subside in October.

When planning a trip to Chattogram, it is important to consider its tropical monsoon climate, characterized by warm weather year-round and a distinct rainy season. Regardless of the time of your visit, light and breathable clothing made from natural fabrics, such as cotton or linen, will be your best choice. Don't forget comfortable shoes for walking, high SPF sunscreen, a hat, and sunglasses for sun protection. A light scarf or shawl will also be useful, which can protect against the sun or be handy when visiting religious sites.

From December to February, drier and cooler weather settles in Chattogram with average temperatures around 20-22°C. During this period, you will need t-shirts, light trousers, and for the evening or early morning — a light sweater or jacket. From March to May, the temperature gradually rises, peaking in April-May (average temperature around 29°C), and the likelihood of precipitation also increases. At this time, loose, light-colored clothing is especially relevant. Starting from May through October lasts the monsoon season, bringing heavy rainfall, especially intense from June to September, when the number of rainy days can reach 28-29 per month. During this period, be sure to bring a sturdy umbrella, a waterproof jacket or raincoat, as well as shoes that dry quickly or are water-resistant. Insect repellent will also be very handy, especially in the rainy season.

Layering your clothing can be useful, especially during transitional seasons or if you plan to visit air-conditioned places. For example, a light sweater or cardigan that can be easily removed or put on will ensure comfort when temperatures change. Given the high humidity, especially in the rainy season, choose clothes that dry quickly. It is also worth remembering the cultural specifics of Bangladesh and choosing more modest clothing that covers shoulders and knees for everyday wear, and especially when visiting temples and mosques.