Thanh Hóa climate

Name: Thanh Hóa
Address: VN

Thanh Hóa is warmest in June, with average highs of 33 °C, and coldest in January, when nights average 15 °C. August is the wettest month (314 mm) and February the driest (18 mm). Figures are 1991–2020 climate normals.

Across a full year Thanh Hóa averages 1,583 mm of rain and 246 days above 25 °C.

Vietnam · population 850,000 · 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 August 314 mm
Least cloud November 60 % cloud
Hottest on record July 40 °C
Coldest on record January 5.5 °C
Warmest sea August 30 °C

What to expectThanh Hóa through the year

Thanh Hóa 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, 246 days a year reach 25 °C, 125 of them reach 30 °C. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is strongly seasonal. August averages 314 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 Thanh Hóa 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	20.1 °C	27 mm	78 %
February	21.7 °C	18 mm	77 %
March	24.6 °C	36 mm	75 %
April	28.4 °C	63 mm	69 %
May	31.2 °C	166 mm	76 %
June	32.8 °C	171 mm	87 %
July	32.4 °C	211 mm	83 %
August	31.3 °C	314 mm	83 %
September	29.8 °C	298 mm	74 %
October	27.6 °C	187 mm	61 %
November	24.9 °C	61 mm	60 %
December	21.2 °C	30 mm	68 %

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	14.6 °C	17.4 °C	30.6 °C	5.5 °C	2	0
February	21.7 °C	16.1 °C	18.8 °C	33.3 °C	5.9 °C	6	1
March	24.6 °C	18.9 °C	21.5 °C	35.0 °C	9.8 °C	14	2
April	28.4 °C	22.4 °C	25.0 °C	37.9 °C	13.4 °C	24	10
May	31.2 °C	25.3 °C	27.9 °C	38.9 °C	18.3 °C	30	20
June	32.8 °C	27.1 °C	29.7 °C	38.9 °C	21.7 °C	30	26
July	32.4 °C	26.9 °C	29.3 °C	40.1 °C	23.6 °C	31	25
August	31.3 °C	26.0 °C	28.3 °C	36.6 °C	22.6 °C	31	22
September	29.8 °C	24.6 °C	27.0 °C	35.5 °C	17.9 °C	29	15
October	27.6 °C	22.2 °C	24.8 °C	32.9 °C	15.0 °C	27	3
November	24.9 °C	19.1 °C	21.9 °C	32.4 °C	10.7 °C	16	0
December	21.2 °C	15.4 °C	18.3 °C	29.3 °C	6.4 °C	4	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	27 mm	6	11 h/day	78 %	79 %	15 km/h	21.0 °C
February	18 mm	4	11 h/day	77 %	81 %	15 km/h	20.6 °C
March	36 mm	6	12 h/day	75 %	84 %	16 km/h	21.4 °C
April	63 mm	7	13 h/day	69 %	83 %	16 km/h	23.9 °C
May	166 mm	14	13 h/day	76 %	80 %	15 km/h	27.6 °C
June	171 mm	14	13 h/day	87 %	76 %	15 km/h	29.4 °C
July	211 mm	16	13 h/day	83 %	78 %	14 km/h	29.7 °C
August	314 mm	21	13 h/day	83 %	84 %	12 km/h	30.0 °C
September	298 mm	20	12 h/day	74 %	84 %	13 km/h	29.5 °C
October	187 mm	15	12 h/day	61 %	80 %	15 km/h	27.9 °C
November	61 mm	8	11 h/day	60 %	78 %	15 km/h	25.6 °C
December	30 mm	5	11 h/day	68 %	75 %	15 km/h	22.8 °C

How Thanh Hóa 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
Thanh Hóa	33 °C	15 °C	1,583 mm	246
Nghi Sơn · Vietnam	33 °C	15 °C	1,467 mm	237
Nam Định · Vietnam	33 °C	14 °C	1,650 mm	252
Vinh · Vietnam	34 °C	16 °C	1,594 mm	249

Where Thanh Hóa ranks

Ranking	Position	Value
Best beach destinations in Asia in April	15th of 50	89/100
Warmest sea temperatures in Asia in August	32nd of 50	30 °C
Warmest sea temperatures in the world in August	42nd of 50	30 °C
Places with the best weather in Asia in December	43rd of 50	95/100

Planning a trip? See the best time to visit Thanh Hóa.

QuestionsCommon questions about Thanh Hóa’s climate

When is the best time to visit Thanh Hóa?

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 Thanh Hóa get?

In June, the warmest month, daily highs average 33 °C. About 125 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 Thanh Hóa?

August, averaging 314 mm over 21 days with rain. The driest month is February with 18 mm. The year as a whole averages 1,583 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 Thanh Hóa 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: 19.800°, 105.767° (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.