Duyên Hải climate — normals and trends

Q: What is the climate of Duyên Hải?

Duyên Hải has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.8 °C and it receives 1,652 mm of precipitation per year.

Q: What is the hottest day ever recorded in Duyên Hải?

The hottest day measured in Duyên Hải between 1940 and 2025 was 22 May 1998, reaching 33.9 °C.

Q: What is the coldest day in Duyên Hải?

The coldest day measured in Duyên Hải between 1940 and 2025 was 17 January 1967, at 18.7 °C.

Q: Does it snow in Duyên Hải?

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

Q: Has the climate of Duyên Hải warmed?

Yes: Duyên Hải warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Duyên Hải?

The wettest day measured in Duyên Hải between 1940 and 2025 was 25 October 1962, with 96 mm of rain in 24 hours.

Q: What was the windiest day in Duyên Hải?

The windiest day measured in Duyên Hải between 1940 and 2025 was 2 December 1972, with winds reaching 52.4 km/h.

Q: What is the warmest month in Duyên Hải?

The warmest month in Duyên Hải is May (28.1 °C on average); the coldest is January (25.3 °C).

Q: How much does it rain in Duyên Hải?

Duyên Hải receives on average 1,652 mm of precipitation per year, spread over about 217 rainy days.

Q: Is it sunny in Duyên Hải?

Duyên Hải gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Duyên Hải (Vietnam) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.8 °C and it receives 1,652 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 May (28.1 °C on average) and the coldest is January (25.3 °C). Rainfall peaks in October.

Duyên Hải averages 0 frost days, 69 hot days (≥ 30 °C) and 217 rainy days per year.

Duyên Hải has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.

The hottest day of the period reached 33.9 °C (on 22 May 1998) and the coldest 18.7 °C (on 17 January 1967).

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

Duyên HảiVinh Long

coords: 9.63°, 106.49°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthMayColdest monthJanuaryWettest monthOctoberDriest monthFebruary

Mean daily temperature

26.8°C

Average daily high

28.7°C

Average daily low

25.5°C

Annual rainfall

1,652mm

Sunshine / day

10.4h

Mean relative humidity

83%

Average peak wind

20.8km/h

Seasonal range

2.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

69 d/yr

Rainy days (≥ 1 mm)

217 d/yr

Annual snowfall

0.0 cm

Average feels-like high

33.3 °C

Average feels-like low

28.8 °C

Average peak gust

36.0 km/h

Tropical nights (≥ 20 °C)

365 d/yr

Solar radiation

19.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.3 °C

since 1940

+0.2 °C per decade · r² = 0.71 · 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

33.9 °C

22 May 1998

Coldest day

18.7 °C

17 January 1967

Wettest day

96 mm

25 October 1962

Windiest day

52.4 km/h

2 December 1972

Strongest gust

80.3 km/h

25 December 2017

Hottest feels-like

41.1 °C

4 June 2024

Coldest feels-like

17.6 °C

24 December 1999

Sunniest day

12.1 h

24 May 1949

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.0 °C9 May 2025	22.6 °C13 January 2025	27.4 °C	1,799 mm	117
2024	33.4 °C4 June 2024	22.3 °C23 December 2024	27.9 °C	1,923 mm	155
2023	33.1 °C6 May 2023	22.2 °C8 January 2023	27.5 °C	1,679 mm	137
2022	32.5 °C27 April 2022	23.0 °C28 December 2022	27.3 °C	1,941 mm	92
2021	32.5 °C31 May 2021	22.7 °C18 January 2021	27.2 °C	1,996 mm	97
2020	32.8 °C21 May 2020	21.9 °C22 December 2020	27.5 °C	1,659 mm	133
2019	33.1 °C1 May 2019	22.4 °C7 December 2019	27.6 °C	1,275 mm	128
2018	31.8 °C26 May 2018	23.1 °C7 February 2018	27.3 °C	1,604 mm	98
2017	32.8 °C22 April 2017	20.8 °C21 December 2017	27.4 °C	2,011 mm	119
2016	32.7 °C23 May 2016	22.8 °C8 February 2016	27.5 °C	1,813 mm	127
2015	33.0 °C18 May 2015	22.8 °C26 January 2015	27.4 °C	1,342 mm	142
2014	32.5 °C29 May 2014	21.7 °C20 January 2014	27.2 °C	1,477 mm	117
2013	33.0 °C7 April 2013	23.0 °C26 December 2013	27.2 °C	1,705 mm	95
2012	32.5 °C25 April 2012	23.6 °C7 January 2012	27.3 °C	1,553 mm	90
2011	32.5 °C9 May 2011	22.1 °C12 December 2011	26.9 °C	1,495 mm	80
2010	32.9 °C10 May 2010	22.5 °C20 January 2010	27.4 °C	1,991 mm	130
2009	33.5 °C19 April 2009	20.5 °C11 January 2009	27.0 °C	1,505 mm	98
2008	31.3 °C9 May 2008	22.6 °C4 January 2008	26.7 °C	1,861 mm	66
2007	31.9 °C7 September 2007	22.4 °C31 January 2007	26.9 °C	1,820 mm	74
2006	32.1 °C13 May 2006	22.8 °C25 January 2006	27.1 °C	1,589 mm	71
2005	32.2 °C6 May 2005	20.1 °C23 December 2005	27.0 °C	1,639 mm	90
2004	32.2 °C10 May 2004	23.3 °C15 February 2004	27.0 °C	1,320 mm	66
2003	32.1 °C19 May 2003	21.6 °C21 December 2003	27.1 °C	1,812 mm	102
2002	32.4 °C1 June 2002	22.9 °C3 January 2002	27.2 °C	1,328 mm	106
2001	33.5 °C9 May 2001	21.9 °C22 November 2001	27.0 °C	1,752 mm	96
2000	31.7 °C9 May 2000	23.1 °C4 February 2000	26.9 °C	1,727 mm	58
1999	31.1 °C23 June 1999	18.8 °C26 December 1999	26.7 °C	2,007 mm	59
1998	33.9 °C22 May 1998	20.7 °C16 December 1998	27.6 °C	1,788 mm	142
1997	31.9 °C19 June 1997	22.7 °C12 January 1997	27.0 °C	1,274 mm	85
1996	31.8 °C7 May 1996	22.3 °C4 January 1996	26.6 °C	2,035 mm	67
1995	33.0 °C20 May 1995	21.9 °C14 December 1995	26.9 °C	1,474 mm	102
1994	33.2 °C4 May 1994	21.8 °C26 October 1994	26.7 °C	1,331 mm	58
1993	31.9 °C9 May 1993	21.5 °C29 January 1993	26.7 °C	1,650 mm	71
1992	33.1 °C31 May 1992	22.2 °C20 January 1992	26.9 °C	1,303 mm	92
1991	31.7 °C18 May 1991	23.3 °C15 November 1991	26.9 °C	1,503 mm	61
1990	33.0 °C23 April 1990	22.0 °C13 November 1990	27.1 °C	1,312 mm	95
1989	32.4 °C22 April 1989	22.7 °C14 February 1989	26.7 °C	1,526 mm	55
1988	32.2 °C31 May 1988	21.8 °C7 November 1988	27.0 °C	1,503 mm	75
1987	32.5 °C25 May 1987	21.5 °C8 December 1987	27.2 °C	1,623 mm	109
1986	32.2 °C14 May 1986	22.2 °C4 March 1986	26.6 °C	1,714 mm	43
1985	32.2 °C2 June 1985	20.7 °C17 December 1985	26.7 °C	1,968 mm	47
1984	31.4 °C2 May 1984	22.4 °C10 January 1984	26.5 °C	1,630 mm	28
1983	33.3 °C21 May 1983	20.9 °C28 November 1983	26.8 °C	1,577 mm	75
1982	31.5 °C3 May 1982	21.4 °C21 December 1982	26.7 °C	1,736 mm	45
1981	32.0 °C31 May 1981	20.7 °C8 December 1981	26.7 °C	1,735 mm	84
1980	31.8 °C14 May 1980	23.0 °C24 December 1980	26.9 °C	1,773 mm	68
1979	32.6 °C14 May 1979	22.6 °C27 December 1979	26.9 °C	1,503 mm	81
1978	31.8 °C13 June 1978	22.3 °C15 December 1978	26.8 °C	1,781 mm	67
1977	32.1 °C31 May 1977	22.1 °C18 February 1977	26.6 °C	1,618 mm	51
1976	31.4 °C16 June 1976	20.7 °C1 January 1976	26.3 °C	1,794 mm	36
1975	33.6 °C28 April 1975	19.3 °C30 December 1975	26.4 °C	2,215 mm	27
1974	31.3 °C7 May 1974	20.7 °C1 January 1974	26.5 °C	1,817 mm	53
1973	31.7 °C19 May 1973	19.7 °C27 December 1973	26.8 °C	1,954 mm	72
1972	32.8 °C27 May 1972	20.8 °C15 January 1972	26.7 °C	2,378 mm	57
1971	31.9 °C11 May 1971	20.2 °C23 November 1971	26.2 °C	1,939 mm	38
1970	31.5 °C16 June 1970	22.2 °C2 February 1970	26.6 °C	1,767 mm	58
1969	32.1 °C3 June 1969	22.0 °C28 November 1969	26.8 °C	1,523 mm	67
1968	31.4 °C28 May 1968	22.2 °C4 January 1968	26.5 °C	1,133 mm	40
1967	32.2 °C22 May 1967	18.7 °C17 January 1967	26.5 °C	1,295 mm	43
1966	31.4 °C17 April 1966	22.9 °C31 December 1966	26.8 °C	1,920 mm	45
1965	32.3 °C30 April 1965	20.9 °C12 January 1965	26.4 °C	1,915 mm	38
1964	31.1 °C30 April 1964	20.7 °C17 November 1964	26.6 °C	1,849 mm	41
1963	32.1 °C8 June 1963	19.9 °C15 January 1963	26.4 °C	1,495 mm	53
1962	31.3 °C25 May 1962	20.7 °C3 December 1962	26.4 °C	1,609 mm	35
1961	31.4 °C26 March 1961	19.7 °C17 January 1961	26.5 °C	1,477 mm	38
1960	32.0 °C25 April 1960	19.6 °C2 January 1960	26.7 °C	1,516 mm	57
1959	32.0 °C26 April 1959	21.8 °C21 December 1959	26.8 °C	1,346 mm	57
1958	32.0 °C6 May 1958	21.9 °C7 January 1958	26.7 °C	1,400 mm	75
1957	32.1 °C16 May 1957	21.1 °C2 January 1957	26.6 °C	1,602 mm	61
1956	30.7 °C24 April 1956	21.0 °C20 November 1956	26.1 °C	1,881 mm	17
1955	31.5 °C31 May 1955	20.3 °C3 December 1955	26.2 °C	1,764 mm	25
1954	32.3 °C9 May 1954	21.7 °C16 December 1954	26.5 °C	1,359 mm	38
1953	31.5 °C29 March 1953	21.4 °C12 December 1953	26.8 °C	1,473 mm	54
1952	31.4 °C24 May 1952	21.0 °C11 December 1952	26.7 °C	1,320 mm	66
1951	32.3 °C7 May 1951	21.3 °C16 December 1951	26.7 °C	1,068 mm	70
1950	32.3 °C22 April 1950	22.9 °C31 December 1950	26.6 °C	1,169 mm	45
1949	33.2 °C3 June 1949	22.0 °C15 January 1949	26.4 °C	1,471 mm	63
1948	30.9 °C13 May 1948	21.2 °C3 January 1948	26.3 °C	1,234 mm	25
1947	32.2 °C24 April 1947	21.5 °C30 December 1947	26.5 °C	1,478 mm	29
1946	30.8 °C16 June 1946	20.1 °C7 January 1946	26.2 °C	1,970 mm	19
1945	30.6 °C30 June 1945	20.8 °C29 December 1945	25.9 °C	2,000 mm	5
1944	32.4 °C3 June 1944	19.3 °C21 December 1944	26.0 °C	1,697 mm	55
1943	30.0 °C30 May 1943	21.6 °C13 January 1943	25.5 °C	1,820 mm	3
1942	30.6 °C24 April 1942	21.1 °C22 November 1942	26.2 °C	1,475 mm	19
1941	30.8 °C29 April 1941	22.8 °C17 December 1941	26.3 °C	2,002 mm	14
1940	30.7 °C26 April 1940	20.9 °C4 January 1940	25.9 °C	2,011 mm	11

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

29.1 °C

+0.4 °C

Hot days (≥ 30 °C)

117 d/yr

+48

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1799 mm

+147 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	27.0 °C	+0.1 °C	29 mm	+11 mm
Feb	27.7 °C	+0.3 °C	9 mm	+3 mm
Mar	28.4 °C	-0.1 °C	11 mm	-8 mm
Apr	30.1 °C	+0.3 °C	34 mm	-31 mm
May	30.7 °C	+0.5 °C	213 mm	+37 mm
Jun	30.0 °C	+0.2 °C	254 mm	+57 mm
Jul	30.1 °C	+0.9 °C	169 mm	-30 mm
Aug	29.8 °C	+0.7 °C	181 mm	-15 mm
Sep	29.5 °C	+0.5 °C	274 mm	+43 mm
Oct	29.4 °C	+0.9 °C	284 mm	+1 mm
Nov	28.6 °C	+0.5 °C	290 mm	+102 mm
Dec	28.1 °C	+0.8 °C	51 mm	-24 mm

The year's extremes

Hottest day

33.0 °C

9 May 2025

Coldest day

22.6 °C

13 Jan 2025

Wettest day

36.7 mm

19 Nov 2025

Windiest day

38.7 km/h

2 Apr 2025

Strongest gust

62.6 km/h

2 Apr 2025

Hottest feels-like

39.5 °C

21 May 2025

Coldest feels-like

22.0 °C

28 Nov 2025

Sunniest day

12.0 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 Duyên Hải?

Duyên Hải has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.8 °C and it receives 1,652 mm of precipitation per year.

What is the hottest day ever recorded in Duyên Hải?

The hottest day measured in Duyên Hải between 1940 and 2025 was 22 May 1998, reaching 33.9 °C.

What is the coldest day in Duyên Hải?

The coldest day measured in Duyên Hải between 1940 and 2025 was 17 January 1967, at 18.7 °C.

Does it snow in Duyên Hải?

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

Has the climate of Duyên Hải warmed?

Yes: Duyên Hải warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Duyên Hải?

The wettest day measured in Duyên Hải between 1940 and 2025 was 25 October 1962, with 96 mm of rain in 24 hours.

What was the windiest day in Duyên Hải?

The windiest day measured in Duyên Hải between 1940 and 2025 was 2 December 1972, with winds reaching 52.4 km/h.

What is the warmest month in Duyên Hải?

The warmest month in Duyên Hải is May (28.1 °C on average); the coldest is January (25.3 °C).

How much does it rain in Duyên Hải?

Duyên Hải receives on average 1,652 mm of precipitation per year, spread over about 217 rainy days.

Is it sunny in Duyên Hải?

Duyên Hải gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Are there tropical nights in Duyên Hải?

Yes: Duyên Hải has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Duyên Hải?

In Duyên Hải, between 1940 and 2025, the highest apparent temperature reached 41.1 °C on 4 June 2024, and the lowest was 17.6 °C on 24 December 1999.

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