Sa Dec climate

Name: Sa Dec
Address: VN

Sa Dec is warmest in April, with average highs of 34 °C, and coldest in January, when nights average 22 °C. October is the wettest month (286 mm) and February the driest (11 mm). Figures are 1991–2020 climate normals.

Across a full year Sa Dec averages 1,845 mm of rain and 364 days above 25 °C.

Vietnam · 1 m elevation · population 214,610 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month April 34 °C
Coldest month January 22 °C
Driest month February 11 mm
Wettest month October 286 mm
Least cloud March 51 % cloud
Hottest on record May 38 °C
Coldest on record December 16 °C

What to expectSa Dec through the year

Sa Dec has a clear annual cycle: average daily highs run from 30 °C in January to 34 °C in April, a swing of 3.1 °C in mean temperature across the year.

Counted across a normal year, 364 days a year reach 25 °C, 254 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in May.

Rain is strongly seasonal. October averages 286 mm against 11 mm in February — 27 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	30.1 °C	27 mm	61 %
February	31.6 °C	11 mm	53 %
March	33.2 °C	37 mm	51 %
April	33.6 °C	77 mm	58 %
May	32.2 °C	198 mm	79 %
June	30.6 °C	243 mm	85 %
July	30.1 °C	239 mm	86 %
August	30.2 °C	247 mm	86 %
September	30.2 °C	275 mm	88 %
October	30.2 °C	286 mm	83 %
November	30.2 °C	136 mm	71 %
December	29.7 °C	69 mm	70 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	30.1 °C	22.0 °C	25.7 °C	34.1 °C	16.3 °C	31	16
February	31.6 °C	22.6 °C	26.6 °C	34.8 °C	18.5 °C	28	25
March	33.2 °C	24.0 °C	28.0 °C	36.4 °C	19.8 °C	31	30
April	33.6 °C	25.1 °C	28.7 °C	37.2 °C	22.0 °C	30	29
May	32.2 °C	25.4 °C	28.1 °C	37.7 °C	22.9 °C	31	27
June	30.6 °C	24.9 °C	27.1 °C	35.5 °C	23.1 °C	30	20
July	30.1 °C	24.6 °C	26.6 °C	33.0 °C	23.2 °C	31	17
August	30.2 °C	24.6 °C	26.7 °C	33.2 °C	23.2 °C	31	18
September	30.2 °C	24.4 °C	26.5 °C	33.1 °C	22.6 °C	30	18
October	30.2 °C	23.9 °C	26.3 °C	32.8 °C	20.5 °C	31	20
November	30.2 °C	23.5 °C	26.3 °C	32.5 °C	18.0 °C	30	20
December	29.7 °C	22.5 °C	25.7 °C	33.4 °C	15.6 °C	30	15

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	27 mm	4	12 h/day	61 %	76 %	12 km/h
February	11 mm	2	12 h/day	53 %	72 %	14 km/h
March	37 mm	5	12 h/day	51 %	71 %	15 km/h
April	77 mm	12	12 h/day	58 %	74 %	13 km/h
May	198 mm	25	13 h/day	79 %	82 %	14 km/h
June	243 mm	27	13 h/day	85 %	86 %	16 km/h
July	239 mm	27	13 h/day	86 %	87 %	17 km/h
August	247 mm	28	12 h/day	86 %	86 %	18 km/h
September	275 mm	28	12 h/day	88 %	87 %	16 km/h
October	286 mm	27	12 h/day	83 %	87 %	12 km/h
November	136 mm	17	12 h/day	71 %	83 %	12 km/h
December	69 mm	9	12 h/day	70 %	79 %	13 km/h

How Sa Dec compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Sa Dec	34 °C	22 °C	1,845 mm	364
Cao Lãnh · Vietnam	34 °C	22 °C	1,814 mm	365
Thốt Nốt · Vietnam	34 °C	22 °C	1,820 mm	364
Cần Thơ · Vietnam	33 °C	22 °C	1,858 mm	364
Long Xuyên · Vietnam	34 °C	22 °C	1,732 mm	365
Mỹ Tho · Vietnam	33 °C	22 °C	1,919 mm	364
Trà Vinh · Vietnam	32 °C	23 °C	2,064 mm	364

Planning a trip? See the best time to visit Sa Dec.

QuestionsCommon questions about Sa Dec’s climate

When is the best time to visit Sa Dec?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, November, December sit closest to 20 °C on average, April is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Sa Dec get?

In April, the warmest month, daily highs average 34 °C. About 254 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 22 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Sa Dec?

October, averaging 286 mm over 27 days with rain. The driest month is February with 11 mm. The year as a whole averages 1,845 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Sa Dec rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.