Nam Định climate

Name: Nam Định
Address: VN

Nam Định is warmest in June, with average highs of 33 °C, and coldest in January, when nights average 14 °C. August is the wettest month (340 mm) and February the driest (18 mm). Figures are 1991–2020 climate normals.

Across a full year Nam Định averages 1,650 mm of rain and 252 days above 25 °C.

Vietnam · population 448,225 · 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 June 33 °C
Coldest month January 14 °C
Driest month February 18 mm
Wettest month August 340 mm
Least cloud November 57 % cloud
Hottest on record July 40 °C
Coldest on record January 4.7 °C

What to expectNam Định through the year

Nam Định has a clear annual cycle: average daily highs run from 20 °C in January to 33 °C in June, a swing of 12 °C in mean temperature across the year.

Counted across a normal year, 252 days a year reach 25 °C, 127 of them reach 30 °C. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is strongly seasonal. August averages 340 mm against 18 mm in February — 19 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	20.1 °C	28 mm	77 %
February	21.8 °C	18 mm	78 %
March	24.6 °C	38 mm	77 %
April	28.2 °C	69 mm	69 %
May	30.8 °C	198 mm	75 %
June	32.6 °C	192 mm	87 %
July	32.4 °C	254 mm	83 %
August	31.2 °C	340 mm	82 %
September	29.9 °C	279 mm	72 %
October	28.0 °C	139 mm	57 %
November	25.2 °C	63 mm	57 %
December	21.3 °C	33 mm	66 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	20.1 °C	14.1 °C	17.0 °C	30.3 °C	4.7 °C	3	0
February	21.8 °C	15.7 °C	18.5 °C	34.2 °C	5.1 °C	7	1
March	24.6 °C	18.5 °C	21.3 °C	34.6 °C	8.9 °C	15	2
April	28.2 °C	22.2 °C	24.7 °C	36.5 °C	12.9 °C	25	9
May	30.8 °C	25.1 °C	27.5 °C	38.6 °C	16.4 °C	30	19
June	32.6 °C	26.9 °C	29.4 °C	37.7 °C	21.2 °C	30	26
July	32.4 °C	26.9 °C	29.3 °C	39.9 °C	23.1 °C	31	26
August	31.2 °C	25.9 °C	28.2 °C	36.3 °C	22.2 °C	31	23
September	29.9 °C	24.4 °C	26.9 °C	35.1 °C	16.7 °C	29	16
October	28.0 °C	21.9 °C	24.7 °C	33.0 °C	13.7 °C	27	5
November	25.2 °C	18.6 °C	21.7 °C	32.8 °C	9.4 °C	18	1
December	21.3 °C	14.7 °C	18.0 °C	29.4 °C	5.6 °C	5	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	28 mm	6	11 h/day	77 %	77 %	15 km/h
February	18 mm	5	11 h/day	78 %	79 %	15 km/h
March	38 mm	7	12 h/day	77 %	82 %	16 km/h
April	69 mm	9	13 h/day	69 %	83 %	16 km/h
May	198 mm	16	13 h/day	75 %	82 %	16 km/h
June	192 mm	16	13 h/day	87 %	78 %	16 km/h
July	254 mm	18	13 h/day	83 %	79 %	15 km/h
August	340 mm	24	13 h/day	82 %	85 %	13 km/h
September	279 mm	21	12 h/day	72 %	85 %	13 km/h
October	139 mm	13	12 h/day	57 %	79 %	14 km/h
November	63 mm	8	11 h/day	57 %	76 %	14 km/h
December	33 mm	6	11 h/day	66 %	73 %	14 km/h

How Nam Định 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
Nam Định	33 °C	14 °C	1,650 mm	252
Hải Dương · Vietnam	33 °C	13 °C	1,784 mm	252
Haiphong · Vietnam	32 °C	14 °C	1,773 mm	245
Long Bien · Vietnam	32 °C	13 °C	1,824 mm	251
Hanoi · Vietnam	33 °C	13 °C	1,730 mm	251

Planning a trip? See the best time to visit Nam Định.

QuestionsCommon questions about Nam Định’s climate

When is the best time to visit Nam Định?

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

How hot does Nam Định get?

In June, the warmest month, daily highs average 33 °C. About 127 days a year pass 30 °C. The highest value in the 1991–2020 record is 40 °C.

How cold does it get in winter?

Nights average 14 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Nam Định?

August, averaging 340 mm over 24 days with rain. The driest month is February with 18 mm. The year as a whole averages 1,650 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 Nam Định 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
Data point: 20.434°, 106.177° (the coordinates the reanalysis values are taken for)
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.