Climate averages 1991–2020

Sunāmganj weather
in September.

A hot, very wet month: the 2nd warmest and the 8th driest of the year.

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

Average high 29.2°C Daytime mean, September

Average low 23.9°C Night-time mean, September

Rainfall 521 mm 28 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Sunāmganj: daytime highs average 29.2°C and nights cool to about 23.9°C. By daytime temperature it is the 2nd warmest of the 12 months.

Expect about 521 mm of rain on roughly 28 days, which makes September a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 19 min on an average September day.

The nearest other city in this atlas is Sylhet (51 km away). In September its highs average 30.1°C, 0.9°C warmer than Sunāmganj, with 523 mm of rain.

Among the 63 cities listed in Bangladesh, Sunāmganj ranks 61st of 63 for the warmest September highs and 62nd of 63 for the driest September (rainfall, lowest first). The mean September high of those 63 cities is 30.5°C; Sunāmganj is 1.3°C cooler than that mean.

From September to October, average highs fall by 0.5°C to 28.7°C, and monthly rainfall falls from 521 mm to 219 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

Sunāmganj climate table

1991–2020

Monthly climate averages for Sunāmganj, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	22.7°C10.6°C	10.6°C	9.5	1.6	10.811 h
February	24.9°C12.9°C	12.9°C	38	4.5	11.311 h
March	27.9°C16.8°C	16.8°C	155	10.2	12.012 h
April	28.6°C20.3°C	20.3°C	519	21.9	12.713 h
May	29.0°C22.5°C	22.5°C	751	28.1	13.313 h
June	29.0°C24.2°C	24.2°C	918	29.6	13.714 h
July	29.0°C24.5°C	24.5°C	916	30.8	13.514 h
August	29.4°C24.6°C	24.6°C	723	30.6	13.013 h
September, selected	29.2°C23.9°C	23.9°C	521	27.8	12.312 h
October	28.7°C21.1°C	21.1°C	219	15.7	11.612 h
November	26.8°C16.2°C	16.2°C	28	2.8	10.911 h
December	24.0°C12.3°C	12.3°C	11	1.2	10.611 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 Sunāmganj

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 Sunāmganj) is explained once on the Sunāmganj year overview and on the Sources, method and limits page.