Climate Insights for Chattogram

The climate in Chattogram is hot. The average annual temperature is 26°C and approximately 2091mm of precipitation falls per year. July is the wettest month, receiving around 468mm of rainfall. Chattogram is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, February, December, when temperatures can drop to 14°C.

Chattogram sees moderate temperature variation throughout the year, ranging from 14°C to 34°C. The warmest month is April, when average highs reach 34°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 14°C and an average of 19°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 4°C shift in average temperatures.

Chattogram is a very wet location, receiving approximately 2091mm of precipitation annually, which averages out to around 174mm per month. The wettest month is July, averaging 468mm of rainfall. June and August also tend to see above-average precipitation. The driest month is January, with just 7mm. That's 461mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Chattogram is relatively calm, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 9km/h in winter, 14km/h in spring, 15km/h in summer, 9km/h in autumn.

It is currently spring in Chattogram, which began on March 20, 2026. Chattogram is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 34°C, while the coldest stretch bottoms out in January near 14°C. Summer is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Chattogram is during January, February, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 14mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 34°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Chattogram based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.