Climate averages 1991–2020

Sa Dec weather
in September.

A hot, very wet month: the joint 6th warmest and the 11th driest of the year.

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

Average high 30.2°C Daytime mean, September

Average low 24.4°C Night-time mean, September

Rainfall 267 mm 28 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Sa Dec: daytime highs average 30.2°C and nights cool to about 24.4°C. By daytime temperature it is the joint 6th warmest of the 12 months.

Expect about 267 mm of rain on roughly 28 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 11 min on an average September day.

The nearest other city in this atlas is Quận Đức Thịnh (3 km away). In September its highs average 30.3°C, about as warm as Sa Dec, with 267 mm of rain.

Among the 136 cities listed in Vietnam, Sa Dec ranks joint 42nd of 136 for the warmest September highs and joint 68th of 136 for the driest September (rainfall, lowest first). The mean September high of those 136 cities is 29.7°C; Sa Dec is 0.5°C warmer than that mean.

From September to October, average highs stay level at 30.2°C, and monthly rainfall rises from 267 mm to 278 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

Sa Dec climate table

1991–2020

Monthly climate averages for Sa Dec, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	30.1°C22.2°C	22.2°C	28	4.3	11.612 h
February	31.6°C22.7°C	22.7°C	10	2.1	11.812 h
March	33.2°C24.1°C	24.1°C	33	5.2	12.112 h
April	33.6°C25.1°C	25.1°C	76	11.6	12.312 h
May	32.2°C25.4°C	25.4°C	196	24.7	12.613 h
June	30.6°C24.9°C	24.9°C	239	26.3	12.713 h
July	30.1°C24.6°C	24.6°C	235	27.8	12.713 h
August	30.2°C24.6°C	24.6°C	242	28.3	12.512 h
September, selected	30.2°C24.4°C	24.4°C	267	28.2	12.212 h
October	30.2°C23.9°C	23.9°C	278	27.3	11.912 h
November	30.2°C23.5°C	23.5°C	135	17.2	11.712 h
December	29.7°C22.6°C	22.6°C	66	9.3	11.512 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 Sa Dec

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

Quận Đức Thịnh lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.