Chittagong Weather in September
Chittagong in September averages 31°C (88°F) during the day and 26°C (79°F) at night. September is part of the rainy season, so frequent rainfall is typical.
Rainfall in Chittagong in September
Chittagong is in the rainy season in September, with rain on around 14 days and an average of 348 mm (14 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Chittagong in September
Daytime temperatures in Chittagong reach 31°C (88°F) in September, dropping to 26°C (79°F) at night. Sunshine and humidity can make it feel even warmer than the raw temperature suggests. Nights remain warm at around 26°C (79°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.
Sunshine in Chittagong in September
The month brings about 169 hours of sunlight, offering a comfortable mix of sun and rainy moments.
Wind Speed in Chittagong in September
Wind speeds average () during September. This means conditions are typically very calm, with barely any noticeable air movement. While this is an average, some days may bring a light breeze, but many remain entirely still.September in Chittagong can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bangladesh, check out our Chittagong's climate page.
Chittagong Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
31°C (88°F)
Chance of Rain
47%
Precipitation
348 mm (14 in)
Rainy days
14 days
Humidity
83%
Windspeed
()
Sunshine
169 hours
Percentage Sunshine
Daily Historical Temperatures
38-year average (1983-2025)
Based on our historical records, temperatures in Chittagong typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Historical weather for Chittagong in September
Browse day-by-day weather records for Chittagong spanning 50 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Chittagong historical weather extremes in September
Based on 20 years of weather observations (2005-2025), these are the most extreme conditions recorded in Chittagong.
- On September 30, 2025, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
- The coldest September day was on September 24, 2005, with a maximum of 26°C (79°F).
- The lowest overnight temperature recorded in September was 23°C (73°F) (September 4, 2015).
Best Places in Bangladesh in September
Find out more about the weather in Bangladesh and which places have the best travel conditions in this month. See all of Bangladesh in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Chittagong in September
Warm but pleasant conditions in Chittagong in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Chittagong in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bangladesh, check out our Chittagong's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Chittagong climate overview or explore weather in Bangladesh.
