Climate averages 1991–2020

Cox’s Bāzār weather
in September.

A hot, very wet month: the 6th warmest and the 9th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 28.8°C Daytime mean, September

Average low 25.1°C Night-time mean, September

Rainfall 341 mm 27 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Cox’s Bāzār: daytime highs average 28.8°C and nights cool to about 25.1°C. By daytime temperature it is the 6th warmest of the 12 months.

Expect about 341 mm of rain on roughly 27 days, which makes September a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average September day.

The nearest other city in this atlas is Chattogram (102 km away). In September its highs average 29.0°C, about as warm as Cox’s Bāzār, with 340 mm of rain.

Among the 63 cities listed in Bangladesh, Cox’s Bāzār ranks 63rd of 63 for the warmest September highs and joint 59th of 63 for the driest September (rainfall, lowest first). The mean September high of those 63 cities is 30.5°C; Cox’s Bāzār is 1.7°C cooler than that mean.

From September to October, average highs rise by 0.2°C to 29.0°C, and monthly rainfall falls from 341 mm to 196 mm.

The annual picture

September in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Cox’s Bāzār climate table

1991–2020

Monthly climate averages for Cox’s Bāzār, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	24.3°C16.6°C	16.6°C	5.0	0.6	11.011 h
February	26.7°C18.4°C	18.4°C	10	1.2	11.411 h
March	29.8°C21.9°C	21.9°C	27	2.6	12.012 h
April	31.3°C24.8°C	24.8°C	53	6.4	12.613 h
May	30.8°C25.8°C	25.8°C	221	18.3	13.113 h
June	29.0°C25.7°C	25.7°C	584	27.3	13.413 h
July	28.1°C25.3°C	25.3°C	658	30.0	13.313 h
August	28.3°C25.2°C	25.2°C	466	29.8	12.913 h
September, selected	28.8°C25.1°C	25.1°C	341	26.5	12.312 h
October	29.0°C24.3°C	24.3°C	196	17.1	11.712 h
November	27.6°C21.4°C	21.4°C	42	4.3	11.111 h
December	25.2°C18.0°C	18.0°C	15	1.3	10.911 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

September in nearby cities

Distance from Cox’s Bāzār

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Cox’s Bāzār) is explained once on the Cox’s Bāzār year overview and on the Sources, method and limits page.