Ha Long climate — normals and trends

Q: What is the climate of Ha Long?

Ha Long has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.3 °C and it receives 1,856 mm of precipitation per year.

Q: What is the hottest day ever recorded in Ha Long?

The hottest day measured in Ha Long between 1940 and 2025 was 3 May 1994, reaching 38.9 °C.

Q: What is the coldest day in Ha Long?

The coldest day measured in Ha Long between 1940 and 2025 was 24 January 2016, at 3.9 °C.

Q: Does it snow in Ha Long?

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

Q: Has the climate of Ha Long warmed?

Yes: Ha Long warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Ha Long?

The wettest day measured in Ha Long between 1940 and 2025 was 25 August 1985, with 247 mm of rain in 24 hours.

Q: What was the windiest day in Ha Long?

The windiest day measured in Ha Long between 1940 and 2025 was 29 October 2012, with winds reaching 58.4 km/h.

Q: What is the warmest month in Ha Long?

The warmest month in Ha Long is July (28.5 °C on average); the coldest is January (16.4 °C).

Q: How much does it rain in Ha Long?

Ha Long receives on average 1,856 mm of precipitation per year, spread over about 183 rainy days.

Q: Is it sunny in Ha Long?

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

Ha Long (Vietnam) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 23.3 °C and it receives 1,856 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 (28.5 °C on average) and the coldest is January (16.4 °C). Rainfall peaks in August.

Ha Long averages 0 frost days, 100 hot days (≥ 30 °C) and 183 rainy days per year.

Ha Long has warmed by +1.1 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.9 °C (on 3 May 1994) and the coldest 3.9 °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

Ha LongQuảng Ninh

coords: 20.95°, 107.07°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJulyColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

23.3°C

Average daily high

26.1°C

Average daily low

21.1°C

Annual rainfall

1,856mm

Sunshine / day

8.0h

Mean relative humidity

81%

Average peak wind

15.2km/h

Seasonal range

12.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

100 d/yr

Rainy days (≥ 1 mm)

183 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.3 °C

Average feels-like low

23.3 °C

Average peak gust

32.5 km/h

Tropical nights (≥ 20 °C)

226 d/yr

Solar radiation

14.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.1 °C

since 1940

+0.1 °C per decade · r² = 0.37 · 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

38.9 °C

3 May 1994

Coldest day

3.9 °C

24 January 2016

Wettest day

247 mm

25 August 1985

Windiest day

58.4 km/h

29 October 2012

Strongest gust

133.2 km/h

11 November 2013

Hottest feels-like

46.4 °C

14 May 1957

Coldest feels-like

-1.5 °C

24 January 2016

Sunniest day

13.1 h

24 June 1956

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	37.1 °C2 June 2025	9.7 °C12 January 2025	23.9 °C	2,023 mm	123
2024	37.7 °C30 April 2024	7.5 °C23 January 2024	24.6 °C	2,149 mm	151
2023	36.2 °C22 May 2023	8.8 °C22 December 2023	24.5 °C	1,502 mm	131
2022	35.2 °C24 August 2022	7.0 °C20 February 2022	23.7 °C	2,023 mm	120
2021	37.7 °C21 June 2021	8.4 °C8 January 2021	24.2 °C	1,599 mm	134
2020	36.5 °C21 May 2020	10.7 °C18 December 2020	24.4 °C	1,669 mm	123
2019	35.9 °C29 June 2019	9.4 °C1 January 2019	24.7 °C	1,752 mm	132
2018	36.4 °C5 July 2018	7.6 °C31 December 2018	23.9 °C	2,106 mm	114
2017	37.6 °C4 June 2017	10.2 °C20 December 2017	23.8 °C	2,335 mm	105
2016	36.1 °C3 June 2016	3.9 °C24 January 2016	23.8 °C	1,869 mm	135
2015	37.4 °C30 May 2015	9.4 °C13 January 2015	24.4 °C	1,754 mm	140
2014	35.1 °C20 June 2014	7.6 °C20 February 2014	23.5 °C	2,040 mm	128
2013	36.5 °C16 May 2013	6.9 °C20 December 2013	23.3 °C	2,072 mm	108
2012	35.6 °C4 May 2012	8.5 °C5 January 2012	23.4 °C	2,145 mm	125
2011	36.0 °C31 August 2011	6.7 °C11 January 2011	22.5 °C	1,521 mm	109
2010	35.9 °C22 May 2010	8.6 °C16 December 2010	23.8 °C	1,859 mm	106
2009	35.3 °C20 June 2009	8.3 °C11 January 2009	23.7 °C	1,976 mm	122
2008	34.9 °C23 September 2008	6.1 °C2 February 2008	22.9 °C	1,919 mm	105
2007	36.8 °C9 June 2007	10.1 °C10 January 2007	23.6 °C	1,359 mm	122
2006	35.0 °C6 June 2006	10.0 °C7 January 2006	23.9 °C	1,350 mm	129
2005	35.7 °C19 July 2005	8.1 °C1 January 2005	23.3 °C	1,531 mm	122
2004	35.2 °C23 June 2004	7.3 °C9 February 2004	23.2 °C	1,403 mm	94
2003	35.6 °C6 May 2003	6.9 °C7 January 2003	24.0 °C	1,693 mm	123
2002	35.0 °C21 May 2002	5.8 °C27 December 2002	23.6 °C	1,884 mm	113
2001	35.5 °C6 July 2001	8.0 °C24 December 2001	23.3 °C	1,864 mm	97
2000	34.3 °C13 August 2000	8.7 °C1 February 2000	23.4 °C	1,443 mm	107
1999	35.1 °C6 June 1999	4.8 °C24 December 1999	23.4 °C	1,526 mm	113
1998	35.9 °C22 May 1998	9.9 °C5 February 1998	24.2 °C	1,351 mm	132
1997	35.5 °C9 June 1997	9.9 °C24 January 1997	23.4 °C	2,094 mm	77
1996	36.0 °C2 August 1996	5.1 °C21 February 1996	23.0 °C	1,839 mm	103
1995	34.3 °C16 June 1995	8.7 °C31 December 1995	23.1 °C	1,694 mm	95
1994	38.9 °C3 May 1994	9.3 °C21 January 1994	23.4 °C	2,263 mm	76
1993	36.5 °C4 June 1993	6.8 °C30 January 1993	23.3 °C	1,597 mm	109
1992	36.2 °C31 August 1992	8.9 °C15 January 1992	22.9 °C	1,742 mm	89
1991	35.2 °C25 May 1991	4.8 °C28 December 1991	23.9 °C	1,334 mm	114
1990	36.5 °C21 August 1990	7.8 °C1 February 1990	23.4 °C	1,956 mm	93
1989	34.6 °C18 June 1989	7.3 °C14 January 1989	23.0 °C	1,664 mm	96
1988	34.7 °C21 May 1988	8.2 °C19 February 1988	23.1 °C	1,579 mm	102
1987	35.8 °C25 June 1987	8.0 °C8 December 1987	23.9 °C	2,070 mm	107
1986	35.5 °C2 July 1986	5.8 °C1 March 1986	23.2 °C	2,077 mm	100
1985	35.3 °C28 May 1985	9.2 °C24 December 1985	22.8 °C	2,017 mm	103
1984	35.0 °C26 July 1984	7.4 °C9 January 1984	22.8 °C	1,586 mm	87
1983	35.6 °C19 June 1983	6.2 °C21 January 1983	22.9 °C	1,579 mm	121
1982	34.2 °C21 June 1982	5.7 °C27 December 1982	23.2 °C	2,117 mm	93
1981	35.4 °C25 August 1981	9.0 °C14 January 1981	23.5 °C	2,476 mm	103
1980	35.0 °C31 May 1980	7.7 °C8 February 1980	23.4 °C	2,032 mm	103
1979	35.4 °C30 July 1979	8.5 °C31 January 1979	23.5 °C	1,912 mm	106
1978	34.8 °C26 August 1978	8.3 °C18 January 1978	23.1 °C	2,838 mm	91
1977	36.9 °C31 May 1977	5.3 °C30 January 1977	23.1 °C	1,622 mm	111
1976	34.3 °C27 May 1976	7.2 °C28 December 1976	22.6 °C	1,558 mm	88
1975	34.5 °C30 July 1975	4.5 °C14 December 1975	23.0 °C	2,287 mm	105
1974	35.1 °C11 July 1974	5.6 °C2 January 1974	23.1 °C	1,753 mm	107
1973	36.4 °C20 July 1973	7.3 °C27 December 1973	23.8 °C	2,959 mm	102
1972	36.0 °C11 July 1972	7.2 °C8 February 1972	23.0 °C	2,435 mm	94
1971	34.7 °C17 June 1971	7.4 °C10 January 1971	22.7 °C	1,894 mm	82
1970	33.9 °C9 May 1970	10.1 °C18 January 1970	23.1 °C	1,641 mm	114
1969	35.9 °C13 May 1969	8.1 °C4 February 1969	23.3 °C	1,239 mm	124
1968	36.0 °C26 July 1968	6.4 °C13 February 1968	23.2 °C	2,109 mm	103
1967	36.9 °C6 July 1967	5.6 °C17 January 1967	22.8 °C	1,641 mm	104
1966	34.3 °C12 May 1966	7.5 °C27 December 1966	23.3 °C	2,056 mm	66
1965	33.8 °C20 July 1965	5.1 °C17 December 1965	22.9 °C	1,955 mm	59
1964	35.7 °C8 August 1964	7.0 °C25 February 1964	23.0 °C	1,813 mm	101
1963	34.4 °C18 July 1963	6.9 °C14 January 1963	22.8 °C	2,153 mm	82
1962	34.4 °C29 May 1962	7.9 °C27 January 1962	22.8 °C	1,755 mm	107
1961	35.3 °C13 July 1961	6.5 °C18 January 1961	23.3 °C	1,801 mm	98
1960	34.9 °C14 June 1960	6.4 °C25 January 1960	23.3 °C	1,939 mm	100
1959	34.7 °C12 June 1959	8.3 °C10 January 1959	23.1 °C	1,793 mm	91
1958	35.9 °C2 June 1958	5.4 °C1 February 1958	23.3 °C	1,583 mm	101
1957	37.6 °C14 May 1957	6.7 °C11 February 1957	23.2 °C	1,683 mm	111
1956	34.0 °C4 September 1956	7.2 °C9 January 1956	22.9 °C	1,524 mm	82
1955	32.6 °C14 July 1955	5.8 °C12 January 1955	23.0 °C	1,473 mm	65
1954	35.6 °C30 June 1954	9.2 °C26 January 1954	23.5 °C	1,408 mm	88
1953	34.2 °C13 August 1953	9.0 °C13 December 1953	23.3 °C	1,866 mm	84
1952	35.1 °C11 July 1952	6.2 °C19 February 1952	23.5 °C	2,352 mm	81
1951	33.4 °C10 April 1951	5.3 °C13 January 1951	23.2 °C	2,358 mm	65
1950	33.2 °C22 July 1950	9.9 °C17 December 1950	23.4 °C	2,137 mm	76
1949	37.0 °C9 June 1949	7.5 °C8 January 1949	23.6 °C	1,432 mm	85
1948	34.5 °C11 July 1948	7.3 °C26 January 1948	23.2 °C	1,783 mm	74
1947	33.7 °C13 June 1947	7.1 °C20 December 1947	22.7 °C	1,527 mm	53
1946	37.6 °C28 July 1946	7.9 °C8 January 1946	24.0 °C	1,217 mm	119
1945	32.8 °C31 July 1945	6.1 °C4 February 1945	22.1 °C	2,489 mm	46
1944	35.0 °C7 April 1944	6.3 °C21 December 1944	22.7 °C	2,115 mm	56
1943	35.4 °C4 June 1943	8.1 °C21 November 1943	22.5 °C	1,744 mm	58
1942	32.7 °C6 August 1942	8.4 °C13 February 1942	22.7 °C	2,336 mm	46
1941	32.1 °C27 June 1941	9.5 °C1 February 1941	22.8 °C	2,053 mm	52
1940	33.5 °C16 May 1940	7.2 °C23 January 1940	22.5 °C	1,996 mm	53

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

26.7 °C

+0.6 °C

Hot days (≥ 30 °C)

123 d/yr

+23

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2023 mm

+167 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	20.9 °C	+1.8 °C	11 mm	-22 mm
Feb	18.9 °C	-0.9 °C	17 mm	-13 mm
Mar	22.6 °C	0.0 °C	21 mm	-27 mm
Apr	26.9 °C	+0.7 °C	67 mm	-18 mm
May	29.6 °C	+0.1 °C	196 mm	-12 mm
Jun	31.7 °C	+0.7 °C	302 mm	+18 mm
Jul	31.7 °C	+0.5 °C	404 mm	+117 mm
Aug	30.8 °C	+0.2 °C	414 mm	+33 mm
Sep	30.9 °C	+1.0 °C	328 mm	+56 mm
Oct	28.5 °C	+0.6 °C	190 mm	+43 mm
Nov	24.3 °C	-0.5 °C	34 mm	-19 mm
Dec	23.0 °C	+1.9 °C	38 mm	+11 mm

The year's extremes

Hottest day

37.1 °C

2 Jun 2025

Coldest day

9.7 °C

12 Jan 2025

Wettest day

102.6 mm

21 Jul 2025

Windiest day

42.4 km/h

22 Jul 2025

Strongest gust

77.0 km/h

22 Jul 2025

Hottest feels-like

46.0 °C

30 Jul 2025

Coldest feels-like

6.4 °C

12 Jan 2025

Sunniest day

12.7 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 Ha Long?

Ha Long has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.3 °C and it receives 1,856 mm of precipitation per year.

What is the hottest day ever recorded in Ha Long?

The hottest day measured in Ha Long between 1940 and 2025 was 3 May 1994, reaching 38.9 °C.

What is the coldest day in Ha Long?

The coldest day measured in Ha Long between 1940 and 2025 was 24 January 2016, at 3.9 °C.

Does it snow in Ha Long?

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

Has the climate of Ha Long warmed?

Yes: Ha Long warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Ha Long?

The wettest day measured in Ha Long between 1940 and 2025 was 25 August 1985, with 247 mm of rain in 24 hours.

What was the windiest day in Ha Long?

The windiest day measured in Ha Long between 1940 and 2025 was 29 October 2012, with winds reaching 58.4 km/h.

What is the warmest month in Ha Long?

The warmest month in Ha Long is July (28.5 °C on average); the coldest is January (16.4 °C).

How much does it rain in Ha Long?

Ha Long receives on average 1,856 mm of precipitation per year, spread over about 183 rainy days.

Is it sunny in Ha Long?

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

Are there tropical nights in Ha Long?

Yes: Ha Long has on average 226 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Ha Long?

In Ha Long, between 1940 and 2025, the highest apparent temperature reached 46.4 °C on 14 May 1957, and the lowest was -1.5 °C on 24 January 2016.

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