Climate Insights for Sylhet

The climate in Sylhet is warm and mild. The average annual temperature is 24°C and approximately 4,403 mm of precipitation falls per year. June is the wettest month, receiving around 870 mm of rainfall. Sylhet is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, July. The coldest months are January, December, February, when temperatures can drop to 12°C.The climate in Sylhet is warm and mild. The average annual temperature is 76°F and approximately 173.3 in of precipitation falls per year. June is the wettest month, receiving around 34.2 in of rainfall. Sylhet is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, July. The coldest months are January, December, February, when temperatures can drop to 54°F.

Sylhet sees moderate temperature variation throughout the year, ranging from 12°C to 32°C. The warmest month is September, when average highs reach 32°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 12°C and an average of 17°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 4°C shift in average temperatures.Sylhet sees moderate temperature variation throughout the year, ranging from 54°F to 90°F. The warmest month is September, when average highs reach 90°F and the mean temperature sits around 83°F. January is the coolest month, with minimum temperatures around 54°F and an average of 63°F. On average, daily temperatures fluctuate by about 15°F between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 7°F shift in average temperatures.

Sylhet is a very wet location, receiving approximately 4,403 mm of precipitation annually, which averages out to around 367 mm per month. The wettest month is June, averaging 870 mm of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 12 mm. That's 858 mm less than June, 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.Sylhet is a very wet location, receiving approximately 173.3 in of precipitation annually, which averages out to around 14.4 in per month. The wettest month is June, averaging 34.3 in of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 0.5 in. That's 33.8 in less than June, 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.

Sylhet is relatively calm, with an average annual wind speed of 4km/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 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.Sylhet is relatively calm, with an average annual wind speed of 3mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is July, averaging 3mph, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 2mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1mph gap between the calmest and windiest months.

The best time to visit Sylhet is during January, February, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 25 mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 32°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.The best time to visit Sylhet is during January, February, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 67°F with modest rainfall averaging 1 in per month. By contrast, September can be uncomfortably hot with temperatures reaching 90°F. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

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