Climate Insights for Chattogram

The climate in Chattogram is hot. The average annual temperature is 26°C and approximately 2691mm of precipitation falls per year. July is the wettest month, receiving around 629mm of rainfall. Chattogram is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, October. The coldest months are January, December, February, when temperatures can drop to 18°C.

Chattogram sees moderate temperature variation throughout the year, ranging from 18°C to 30°C. The warmest month is May, when average highs reach 30°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 18°C and an average of 20°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between February and March, with a 3°C shift in average temperatures.

Chattogram is a very wet location, receiving approximately 2691mm of precipitation annually, which averages out to around 224mm per month. The wettest month is July, averaging 629mm of rainfall. June and August also tend to see above-average precipitation. The driest month is January, with just 6mm. That's 622mm 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 mildly breezy, with an average annual wind speed of 14km/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 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in November, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 11km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 11km/h in winter, 14km/h in spring, 20km/h in summer, 11km/h in autumn.

It is currently summer in Chattogram, which began on June 21, 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 May at around 30°C, while the coldest stretch bottoms out in January near 18°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Chattogram is during January, February and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 9mm per month. By contrast, May can be uncomfortably hot with temperatures reaching 30°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.