Nghi Sơn climate

Name: Nghi Sơn
Address: VN

Nghi Sơn is warmest in June, with average highs of 33 °C, and coldest in January, when nights average 15 °C. September is the wettest month (313 mm) and February the driest (18 mm). Figures are 1991–2020 climate normals.

Across a full year Nghi Sơn averages 1,467 mm of rain and 237 days above 25 °C.

Vietnam · population 302,210 · 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 15 °C
Driest month February 18 mm
Wettest month September 313 mm
Least cloud November 61 % cloud
Hottest on record July 40 °C
Coldest on record January 5.7 °C
Warmest sea August 30 °C

What to expectNghi Sơn through the year

Nghi Sơn 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, 237 days a year reach 25 °C, 118 of them reach 30 °C. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is strongly seasonal. September averages 313 mm against 18 mm in February — 18 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Nghi Sơn is warmest in August at 30 °C and coldest in February at 21 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	19.9 °C	26 mm	77 %
February	21.6 °C	18 mm	75 %
March	24.7 °C	36 mm	71 %
April	28.7 °C	53 mm	65 %
May	31.2 °C	117 mm	74 %
June	32.9 °C	125 mm	85 %
July	32.6 °C	182 mm	82 %
August	31.1 °C	267 mm	83 %
September	29.3 °C	313 mm	74 %
October	26.9 °C	227 mm	62 %
November	24.2 °C	64 mm	61 %
December	20.7 °C	40 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	19.9 °C	15.0 °C	17.5 °C	30.6 °C	5.7 °C	2	0
February	21.6 °C	16.4 °C	18.9 °C	34.0 °C	5.9 °C	5	1
March	24.7 °C	19.1 °C	21.6 °C	35.6 °C	10.4 °C	14	3
April	28.7 °C	22.6 °C	25.1 °C	38.0 °C	14.6 °C	24	11
May	31.2 °C	25.4 °C	27.9 °C	39.5 °C	18.1 °C	30	19
June	32.9 °C	27.2 °C	29.7 °C	38.8 °C	21.1 °C	30	26
July	32.6 °C	27.0 °C	29.4 °C	39.8 °C	22.9 °C	31	25
August	31.1 °C	25.9 °C	28.2 °C	38.1 °C	21.4 °C	31	21
September	29.3 °C	24.5 °C	26.7 °C	35.0 °C	17.1 °C	29	11
October	26.9 °C	22.3 °C	24.5 °C	32.4 °C	16.8 °C	25	1
November	24.2 °C	19.4 °C	21.8 °C	32.2 °C	12.6 °C	13	0
December	20.7 °C	15.9 °C	18.3 °C	28.7 °C	6.1 °C	3	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	26 mm	6	11 h/day	77 %	80 %	17 km/h	21.1 °C
February	18 mm	4	12 h/day	75 %	82 %	17 km/h	20.7 °C
March	36 mm	6	12 h/day	71 %	84 %	17 km/h	21.5 °C
April	53 mm	7	13 h/day	65 %	82 %	17 km/h	24.0 °C
May	117 mm	12	13 h/day	74 %	78 %	17 km/h	27.6 °C
June	125 mm	12	13 h/day	85 %	72 %	18 km/h	29.5 °C
July	182 mm	14	13 h/day	82 %	73 %	18 km/h	29.7 °C
August	267 mm	20	13 h/day	83 %	81 %	15 km/h	30.0 °C
September	313 mm	20	12 h/day	74 %	84 %	15 km/h	29.5 °C
October	227 mm	16	12 h/day	62 %	82 %	18 km/h	27.9 °C
November	64 mm	9	11 h/day	61 %	79 %	18 km/h	25.6 °C
December	40 mm	6	11 h/day	70 %	77 %	18 km/h	22.9 °C

How Nghi Sơn 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
Nghi Sơn	33 °C	15 °C	1,467 mm	237
Thanh Hóa · Vietnam	33 °C	15 °C	1,583 mm	246
Vinh · Vietnam	34 °C	16 °C	1,594 mm	249
Hà Tĩnh · Vietnam	33 °C	16 °C	2,255 mm	246
Nam Định · Vietnam	33 °C	14 °C	1,650 mm	252
Kỳ Anh · Vietnam	34 °C	17 °C	1,995 mm	258

Where Nghi Sơn ranks

Ranking	Position	Value
Best beach destinations in Asia in April	10th of 50	90/100
Warmest sea temperatures in Asia in August	31st of 50	30 °C
Best beach destinations in the world in April	41st of 50	90/100
Warmest sea temperatures in the world in August	41st of 50	30 °C
Warmest sea temperatures in Asia in September	49th of 50	30 °C

Planning a trip? See the best time to visit Nghi Sơn.

QuestionsCommon questions about Nghi Sơn’s climate

When is the best time to visit Nghi Sơn?

That depends on what you want, so the honest answer is a comparison rather than a single month. February, March, December 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 Nghi Sơn get?

In June, the warmest month, daily highs average 33 °C. About 118 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 15 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Nghi Sơn?

September, averaging 313 mm over 20 days with rain. The driest month is February with 18 mm. The year as a whole averages 1,467 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 Nghi Sơn 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: 19.327°, 105.821° (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.