Sầm Sơn climate — normals and trends

Q: What is the climate of Sầm Sơn?

Sầm Sơn has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 24.2 °C and it receives 1,790 mm of precipitation per year.

Q: What is the hottest day ever recorded in Sầm Sơn?

The hottest day measured in Sầm Sơn between 1940 and 2025 was 7 July 1946, reaching 35.2 °C.

Q: What is the coldest day in Sầm Sơn?

The coldest day measured in Sầm Sơn between 1940 and 2025 was 24 January 2016, at 7.4 °C.

Q: Does it snow in Sầm Sơn?

Almost never: Sầm Sơn sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Sầm Sơn warmed?

Yes: Sầm Sơn warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Sầm Sơn?

The wettest day measured in Sầm Sơn between 1940 and 2025 was 24 October 1971, with 316 mm of rain in 24 hours.

Q: What was the windiest day in Sầm Sơn?

The windiest day measured in Sầm Sơn between 1940 and 2025 was 28 October 2012, with winds reaching 83.6 km/h.

Q: What is the warmest month in Sầm Sơn?

The warmest month in Sầm Sơn is July (29.4 °C on average); the coldest is January (17.9 °C).

Q: How much does it rain in Sầm Sơn?

Sầm Sơn receives on average 1,790 mm of precipitation per year, spread over about 158 rainy days.

Q: Is it sunny in Sầm Sơn?

Sầm Sơn gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

Sầm Sơn (Vietnam) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 24.2 °C and it receives 1,790 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is July (29.4 °C on average) and the coldest is January (17.9 °C). Rainfall peaks in September.

Sầm Sơn averages 0 frost days, 63 hot days (≥ 30 °C) and 158 rainy days per year.

Sầm Sơn has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.

The hottest day of the period reached 35.2 °C (on 7 July 1946) and the coldest 7.4 °C (on 24 January 2016).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

Sầm SơnThanh Hóa Province

coords: 19.73°, 105.90°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthSeptemberDriest monthFebruary

Mean daily temperature

24.2°C

Average daily high

25.3°C

Average daily low

23.0°C

Annual rainfall

1,790mm

Sunshine / day

8.0h

Mean relative humidity

82%

Average peak wind

22.7km/h

Seasonal range

11.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

63 d/yr

Rainy days (≥ 1 mm)

158 d/yr

Annual snowfall

0.0 cm

Average feels-like high

28.6 °C

Average feels-like low

24.6 °C

Average peak gust

32.5 km/h

Tropical nights (≥ 20 °C)

266 d/yr

Solar radiation

15.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.7 °C

since 1940

+0.1 °C per decade · r² = 0.19 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

35.2 °C

7 July 1946

Coldest day

7.4 °C

24 January 2016

Wettest day

316 mm

24 October 1971

Windiest day

83.6 km/h

28 October 2012

Strongest gust

128.9 km/h

28 October 2012

Hottest feels-like

43.8 °C

4 July 2015

Coldest feels-like

0.0 °C

24 January 2016

Sunniest day

13.0 h

25 June 1956

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.3 °C3 August 2025	13.1 °C8 February 2025	24.3 °C	2,722 mm	70
2024	33.4 °C27 April 2024	10.4 °C24 January 2024	25.2 °C	1,980 mm	96
2023	33.5 °C16 July 2023	11.6 °C22 December 2023	25.1 °C	1,426 mm	101
2022	32.9 °C19 June 2022	9.9 °C20 February 2022	24.4 °C	2,045 mm	80
2021	33.8 °C7 August 2021	10.0 °C8 January 2021	24.7 °C	1,713 mm	86
2020	33.8 °C21 May 2020	13.3 °C18 December 2020	24.9 °C	1,729 mm	102
2019	34.2 °C28 June 2019	12.6 °C1 January 2019	25.5 °C	2,021 mm	98
2018	33.5 °C3 July 2018	10.2 °C30 January 2018	24.4 °C	2,008 mm	69
2017	33.4 °C4 June 2017	13.1 °C18 December 2017	24.5 °C	2,033 mm	73
2016	33.9 °C14 June 2016	7.4 °C24 January 2016	24.6 °C	1,829 mm	82
2015	34.0 °C30 June 2015	12.7 °C6 February 2015	25.1 °C	1,820 mm	96
2014	33.0 °C22 May 2014	10.4 °C13 February 2014	24.5 °C	1,658 mm	92
2013	32.8 °C9 June 2013	11.6 °C20 December 2013	24.3 °C	2,419 mm	69
2012	33.2 °C22 July 2012	10.8 °C5 January 2012	24.4 °C	1,802 mm	79
2011	33.0 °C1 September 2011	9.3 °C11 January 2011	23.3 °C	2,166 mm	47
2010	33.2 °C15 June 2010	11.4 °C16 December 2010	24.6 °C	2,109 mm	71
2009	32.9 °C20 June 2009	11.6 °C24 January 2009	24.5 °C	1,666 mm	82
2008	32.4 °C22 August 2008	9.0 °C2 February 2008	23.8 °C	1,665 mm	59
2007	33.1 °C29 June 2007	13.1 °C19 January 2007	24.3 °C	1,504 mm	77
2006	33.1 °C15 July 2006	11.6 °C7 January 2006	24.5 °C	1,361 mm	58
2005	33.1 °C19 July 2005	10.5 °C1 January 2005	24.2 °C	1,878 mm	59
2004	33.2 °C5 July 2004	11.0 °C8 February 2004	24.1 °C	1,520 mm	49
2003	33.0 °C26 June 2003	10.7 °C6 January 2003	24.7 °C	1,370 mm	67
2002	32.3 °C11 July 2002	9.5 °C27 December 2002	24.3 °C	1,562 mm	64
2001	32.8 °C24 August 2001	12.8 °C14 December 2001	24.1 °C	1,949 mm	44
2000	33.2 °C13 August 2000	10.5 °C1 February 2000	24.0 °C	1,728 mm	47
1999	33.3 °C20 July 1999	10.7 °C23 December 1999	24.2 °C	1,498 mm	76
1998	32.8 °C20 July 1998	11.7 °C5 February 1998	25.1 °C	1,076 mm	77
1997	33.4 °C7 August 1997	12.6 °C24 January 1997	24.5 °C	1,633 mm	60
1996	32.7 °C8 August 1996	8.3 °C21 February 1996	23.8 °C	2,624 mm	47
1995	32.8 °C12 July 1995	12.5 °C31 January 1995	24.1 °C	1,437 mm	65
1994	32.0 °C22 July 1994	11.8 °C21 January 1994	24.2 °C	2,025 mm	36
1993	33.8 °C11 August 1993	10.2 °C16 January 1993	24.2 °C	1,530 mm	78
1992	33.5 °C5 September 1992	13.0 °C8 January 1992	24.1 °C	1,593 mm	59
1991	33.0 °C10 August 1991	8.6 °C28 December 1991	24.6 °C	1,460 mm	54
1990	33.3 °C20 August 1990	10.5 °C31 January 1990	24.4 °C	2,058 mm	72
1989	32.1 °C17 July 1989	9.9 °C13 January 1989	23.7 °C	2,084 mm	45
1988	32.8 °C3 September 1988	10.6 °C19 February 1988	24.0 °C	1,552 mm	74
1987	33.9 °C24 June 1987	12.5 °C26 January 1987	24.8 °C	1,523 mm	71
1986	32.8 °C30 June 1986	8.8 °C1 March 1986	24.0 °C	1,505 mm	53
1985	33.1 °C5 August 1985	11.6 °C10 January 1985	23.7 °C	2,043 mm	56
1984	32.8 °C24 July 1984	10.8 °C21 January 1984	23.6 °C	1,550 mm	56
1983	33.6 °C19 June 1983	9.4 °C22 January 1983	24.0 °C	1,888 mm	76
1982	33.1 °C24 July 1982	11.4 °C11 February 1982	24.0 °C	2,160 mm	58
1981	33.3 °C25 August 1981	13.2 °C20 December 1981	24.2 °C	1,844 mm	55
1980	32.2 °C7 July 1980	9.7 °C8 February 1980	24.2 °C	2,060 mm	37
1979	32.5 °C5 July 1979	11.1 °C1 February 1979	24.5 °C	1,528 mm	52
1978	32.6 °C25 June 1978	10.7 °C18 January 1978	24.0 °C	2,392 mm	45
1977	32.9 °C30 May 1977	8.5 °C30 January 1977	23.9 °C	1,481 mm	74
1976	32.2 °C10 July 1976	9.6 °C28 December 1976	23.5 °C	1,495 mm	48
1975	32.7 °C3 July 1975	8.8 °C14 December 1975	23.7 °C	1,778 mm	54
1974	32.7 °C12 July 1974	10.1 °C25 February 1974	23.7 °C	1,916 mm	60
1973	33.4 °C19 July 1973	12.3 °C3 January 1973	24.4 °C	2,301 mm	60
1972	33.4 °C11 July 1972	9.7 °C9 February 1972	23.7 °C	1,987 mm	45
1971	32.4 °C22 July 1971	9.8 °C30 January 1971	23.3 °C	2,198 mm	41
1970	32.3 °C4 August 1970	11.7 °C19 January 1970	23.8 °C	1,744 mm	62
1969	33.4 °C23 May 1969	11.6 °C31 January 1969	24.1 °C	1,151 mm	59
1968	33.2 °C7 July 1968	10.0 °C14 February 1968	23.9 °C	1,620 mm	73
1967	34.0 °C13 August 1967	10.0 °C1 February 1967	23.4 °C	1,664 mm	76
1966	33.0 °C18 August 1966	10.8 °C27 December 1966	24.6 °C	1,918 mm	51
1965	32.1 °C21 July 1965	9.4 °C18 December 1965	24.0 °C	1,736 mm	36
1964	34.1 °C1 August 1964	9.7 °C25 February 1964	23.8 °C	2,391 mm	60
1963	32.1 °C11 July 1963	11.6 °C9 February 1963	23.7 °C	1,978 mm	35
1962	32.5 °C21 July 1962	11.6 °C3 January 1962	23.7 °C	1,711 mm	48
1961	33.7 °C13 July 1961	11.3 °C13 January 1961	24.1 °C	1,887 mm	59
1960	32.3 °C14 June 1960	9.5 °C25 January 1960	24.0 °C	1,725 mm	56
1959	34.1 °C13 June 1959	10.8 °C10 January 1959	24.1 °C	1,856 mm	63
1958	33.0 °C12 July 1958	9.0 °C1 February 1958	24.0 °C	1,481 mm	44
1957	33.4 °C14 May 1957	9.4 °C11 February 1957	23.9 °C	1,897 mm	69
1956	32.0 °C4 September 1956	10.3 °C8 January 1956	23.7 °C	1,881 mm	49
1955	32.2 °C14 July 1955	10.0 °C11 January 1955	23.8 °C	1,529 mm	50
1954	34.0 °C18 June 1954	12.1 °C26 January 1954	24.5 °C	1,726 mm	64
1953	32.1 °C13 August 1953	13.4 °C19 February 1953	24.4 °C	2,351 mm	57
1952	33.0 °C10 July 1952	9.3 °C19 February 1952	24.7 °C	2,364 mm	76
1951	32.8 °C31 July 1951	9.4 °C13 January 1951	24.2 °C	2,022 mm	50
1950	33.5 °C23 July 1950	12.2 °C17 February 1950	24.7 °C	1,782 mm	74
1949	33.2 °C9 June 1949	10.6 °C8 January 1949	24.6 °C	1,267 mm	71
1948	33.0 °C17 June 1948	10.4 °C26 January 1948	24.3 °C	1,515 mm	60
1947	33.1 °C18 July 1947	10.9 °C19 December 1947	23.8 °C	1,353 mm	52
1946	35.2 °C7 July 1946	13.0 °C6 January 1946	24.7 °C	1,254 mm	99
1945	32.1 °C31 July 1945	9.5 °C4 February 1945	23.4 °C	1,316 mm	54
1944	32.7 °C20 July 1944	10.9 °C20 December 1944	23.8 °C	1,651 mm	54
1943	32.6 °C18 June 1943	11.7 °C8 February 1943	23.6 °C	1,574 mm	60
1942	32.8 °C7 August 1942	10.5 °C13 February 1942	24.0 °C	1,641 mm	42
1941	31.9 °C16 June 1941	11.5 °C1 February 1941	24.2 °C	2,131 mm	52
1940	32.3 °C1 July 1940	10.4 °C23 January 1940	23.9 °C	1,944 mm	48

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

25.5 °C

+0.2 °C

Hot days (≥ 30 °C)

70 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2722 mm

+932 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	19.6 °C	+0.5 °C	22 mm	-31 mm
Feb	19.0 °C	-0.5 °C	54 mm	+7 mm
Mar	20.9 °C	-0.6 °C	48 mm	-6 mm
Apr	24.5 °C	0.0 °C	82 mm	+23 mm
May	28.1 °C	+0.1 °C	211 mm	+83 mm
Jun	30.6 °C	+0.4 °C	123 mm	-27 mm
Jul	30.8 °C	+0.3 °C	461 mm	+293 mm
Aug	30.1 °C	+0.1 °C	691 mm	+386 mm
Sep	29.4 °C	+0.7 °C	650 mm	+256 mm
Oct	27.3 °C	+0.7 °C	182 mm	-108 mm
Nov	23.1 °C	-0.8 °C	131 mm	+34 mm
Dec	22.0 °C	+1.3 °C	68 mm	+21 mm

The year's extremes

Hottest day

33.3 °C

3 Aug 2025

Coldest day

13.1 °C

8 Feb 2025

Wettest day

236.4 mm

22 Jul 2025

Windiest day

78.7 km/h

29 Sep 2025

Strongest gust

116.6 km/h

29 Sep 2025

Hottest feels-like

40.7 °C

10 Aug 2025

Coldest feels-like

7.7 °C

26 Jan 2025

Sunniest day

12.6 h

1 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Sầm Sơn?

Sầm Sơn has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 24.2 °C and it receives 1,790 mm of precipitation per year.

What is the hottest day ever recorded in Sầm Sơn?

The hottest day measured in Sầm Sơn between 1940 and 2025 was 7 July 1946, reaching 35.2 °C.

What is the coldest day in Sầm Sơn?

The coldest day measured in Sầm Sơn between 1940 and 2025 was 24 January 2016, at 7.4 °C.

Does it snow in Sầm Sơn?

Almost never: Sầm Sơn sees virtually no snow, with about 0 frost days per year.

Has the climate of Sầm Sơn warmed?

Yes: Sầm Sơn warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Sầm Sơn?

The wettest day measured in Sầm Sơn between 1940 and 2025 was 24 October 1971, with 316 mm of rain in 24 hours.

What was the windiest day in Sầm Sơn?

The windiest day measured in Sầm Sơn between 1940 and 2025 was 28 October 2012, with winds reaching 83.6 km/h.

What is the warmest month in Sầm Sơn?

The warmest month in Sầm Sơn is July (29.4 °C on average); the coldest is January (17.9 °C).

How much does it rain in Sầm Sơn?

Sầm Sơn receives on average 1,790 mm of precipitation per year, spread over about 158 rainy days.

Is it sunny in Sầm Sơn?

Sầm Sơn gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

Are there tropical nights in Sầm Sơn?

Yes: Sầm Sơn has on average 266 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Sầm Sơn?

In Sầm Sơn, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 4 July 2015, and the lowest was 0.0 °C on 24 January 2016.

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