Bac Ninh climate — normals and trends

Q: What is the climate of Bac Ninh?

Bac Ninh has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.9 °C and it receives 1,899 mm of precipitation per year.

Q: What is the hottest day ever recorded in Bac Ninh?

The hottest day measured in Bac Ninh between 1940 and 2025 was 30 July 1946, reaching 41.0 °C.

Q: What is the coldest day in Bac Ninh?

The coldest day measured in Bac Ninh between 1940 and 2025 was 2 January 1974, at 2.9 °C.

Q: Does it snow in Bac Ninh?

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

Q: Has the climate of Bac Ninh warmed?

Yes: Bac Ninh warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Bac Ninh?

The wettest day measured in Bac Ninh between 1940 and 2025 was 31 August 1975, with 208 mm of rain in 24 hours.

Q: What was the windiest day in Bac Ninh?

The windiest day measured in Bac Ninh between 1940 and 2025 was 7 September 2024, with winds reaching 49.1 km/h.

Q: What is the warmest month in Bac Ninh?

The warmest month in Bac Ninh is July (29.4 °C on average); the coldest is January (16.6 °C).

Q: How much does it rain in Bac Ninh?

Bac Ninh receives on average 1,899 mm of precipitation per year, spread over about 178 rainy days.

Q: Is it sunny in Bac Ninh?

Bac Ninh gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.

Bac Ninh (Vietnam) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 23.9 °C and it receives 1,899 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 (16.6 °C). Rainfall peaks in August.

Bac Ninh averages 0 frost days, 157 hot days (≥ 30 °C) and 178 rainy days per year.

Bac Ninh has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.

The hottest day of the period reached 41.0 °C (on 30 July 1946) and the coldest 2.9 °C (on 2 January 1974).

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

Bac NinhBac Ninh

coords: 21.19°, 106.08°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJulyColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

23.9°C

Average daily high

27.7°C

Average daily low

21.0°C

Annual rainfall

1,899mm

Sunshine / day

6.8h

Mean relative humidity

79%

Average peak wind

12.6km/h

Seasonal range

12.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

157 d/yr

Rainy days (≥ 1 mm)

178 d/yr

Annual snowfall

0.0 cm

Average feels-like high

31.3 °C

Average feels-like low

23.6 °C

Average peak gust

27.0 km/h

Tropical nights (≥ 20 °C)

228 d/yr

Solar radiation

13.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.2 °C

since 1940

+0.1 °C per decade · r² = 0.36 · 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

41.0 °C

30 July 1946

Coldest day

2.9 °C

2 January 1974

Wettest day

208 mm

31 August 1975

Windiest day

49.1 km/h

7 September 2024

Strongest gust

109.8 km/h

23 July 1980

Hottest feels-like

48.2 °C

30 May 2015

Coldest feels-like

-0.5 °C

12 January 1955

Sunniest day

13.1 h

14 June 1981

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	39.2 °C1 June 2025	7.6 °C13 January 2025	24.6 °C	2,182 mm	166
2024	38.9 °C27 April 2024	8.7 °C24 January 2024	25.3 °C	2,417 mm	198
2023	38.6 °C17 May 2023	7.5 °C30 January 2023	25.2 °C	1,761 mm	175
2022	37.5 °C4 June 2022	8.5 °C20 February 2022	24.3 °C	2,069 mm	164
2021	39.3 °C3 June 2021	7.4 °C2 January 2021	24.9 °C	1,695 mm	172
2020	38.9 °C21 May 2020	10.0 °C31 January 2020	24.8 °C	1,922 mm	154
2019	38.7 °C19 May 2019	8.5 °C10 December 2019	25.1 °C	1,819 mm	175
2018	38.8 °C6 July 2018	8.4 °C30 December 2018	24.6 °C	2,115 mm	169
2017	40.2 °C3 June 2017	9.8 °C20 December 2017	24.5 °C	2,136 mm	159
2016	38.0 °C2 June 2016	5.8 °C24 January 2016	24.7 °C	1,776 mm	186
2015	38.6 °C29 May 2015	8.9 °C14 January 2015	25.1 °C	1,936 mm	187
2014	38.7 °C22 May 2014	5.7 °C23 January 2014	24.3 °C	1,922 mm	175
2013	38.6 °C16 May 2013	6.5 °C20 December 2013	24.0 °C	2,052 mm	164
2012	38.2 °C2 May 2012	8.6 °C5 January 2012	24.1 °C	1,742 mm	177
2011	37.6 °C7 July 2011	7.5 °C26 December 2011	23.1 °C	1,706 mm	144
2010	38.0 °C20 May 2010	8.9 °C27 December 2010	24.6 °C	2,015 mm	174
2009	37.7 °C8 June 2009	6.7 °C11 January 2009	24.6 °C	1,533 mm	181
2008	36.7 °C8 April 2008	6.6 °C1 February 2008	23.4 °C	2,035 mm	159
2007	37.9 °C9 June 2007	7.6 °C29 January 2007	24.2 °C	1,649 mm	155
2006	37.1 °C11 April 2006	7.9 °C23 December 2006	24.4 °C	1,534 mm	186
2005	37.5 °C13 June 2005	8.3 °C2 January 2005	24.0 °C	1,608 mm	168
2004	38.2 °C3 July 2004	7.0 °C9 February 2004	24.0 °C	1,469 mm	165
2003	39.0 °C6 May 2003	6.8 °C7 January 2003	24.8 °C	1,569 mm	194
2002	37.4 °C21 May 2002	8.1 °C27 December 2002	24.3 °C	1,899 mm	181
2001	37.7 °C21 April 2001	6.1 °C25 December 2001	24.0 °C	1,969 mm	151
2000	36.8 °C18 July 2000	7.2 °C2 February 2000	24.0 °C	1,961 mm	152
1999	36.1 °C6 June 1999	3.8 °C24 December 1999	24.1 °C	1,683 mm	163
1998	38.1 °C15 June 1998	9.8 °C20 January 1998	24.9 °C	1,648 mm	180
1997	38.5 °C9 June 1997	8.7 °C12 January 1997	24.1 °C	2,187 mm	157
1996	38.7 °C6 May 1996	6.6 °C21 February 1996	23.6 °C	2,053 mm	160
1995	37.9 °C23 June 1995	6.4 °C31 December 1995	23.7 °C	1,923 mm	163
1994	39.1 °C3 May 1994	9.8 °C24 January 1994	24.1 °C	2,324 mm	149
1993	37.5 °C4 June 1993	5.5 °C31 January 1993	23.9 °C	1,826 mm	162
1992	37.1 °C21 April 1992	8.3 °C17 January 1992	23.7 °C	1,795 mm	147
1991	37.0 °C24 May 1991	8.2 °C28 December 1991	24.4 °C	1,435 mm	161
1990	38.8 °C22 April 1990	9.1 °C6 December 1990	24.2 °C	2,138 mm	159
1989	37.1 °C18 June 1989	8.6 °C29 January 1989	23.6 °C	2,005 mm	150
1988	38.7 °C24 May 1988	8.3 °C20 February 1988	23.6 °C	1,757 mm	151
1987	38.3 °C21 May 1987	6.7 °C8 December 1987	24.8 °C	1,844 mm	184
1986	38.3 °C2 July 1986	6.0 °C3 March 1986	23.8 °C	2,311 mm	148
1985	38.2 °C27 May 1985	7.6 °C25 December 1985	23.4 °C	1,948 mm	170
1984	37.4 °C14 June 1984	6.7 °C9 January 1984	23.3 °C	1,712 mm	148
1983	39.0 °C5 July 1983	5.9 °C23 January 1983	23.6 °C	1,700 mm	167
1982	37.6 °C21 June 1982	3.7 °C27 December 1982	23.8 °C	2,159 mm	152
1981	37.5 °C25 August 1981	7.5 °C21 December 1981	24.1 °C	2,474 mm	168
1980	38.1 °C31 May 1980	7.7 °C8 February 1980	24.0 °C	2,217 mm	160
1979	37.4 °C15 July 1979	9.8 °C26 December 1979	24.1 °C	2,018 mm	179
1978	36.9 °C25 June 1978	8.0 °C21 January 1978	23.6 °C	2,713 mm	144
1977	38.0 °C9 June 1977	5.9 °C31 January 1977	23.6 °C	1,630 mm	157
1976	36.7 °C16 June 1976	7.2 °C13 January 1976	23.2 °C	1,774 mm	143
1975	37.0 °C30 July 1975	3.6 °C31 December 1975	23.6 °C	2,608 mm	152
1974	37.7 °C2 June 1974	2.9 °C2 January 1974	23.7 °C	1,892 mm	168
1973	39.5 °C20 May 1973	4.8 °C27 December 1973	24.5 °C	2,565 mm	166
1972	39.4 °C10 May 1972	6.5 °C16 January 1972	23.9 °C	2,274 mm	176
1971	37.2 °C4 June 1971	5.3 °C10 January 1971	23.3 °C	1,913 mm	147
1970	37.7 °C9 May 1970	7.4 °C31 January 1970	23.7 °C	1,633 mm	152
1969	39.0 °C13 May 1969	7.1 °C11 December 1969	24.0 °C	1,405 mm	186
1968	38.5 °C24 May 1968	4.6 °C14 February 1968	24.0 °C	1,837 mm	149
1967	39.7 °C6 July 1967	4.7 °C18 January 1967	23.5 °C	1,352 mm	153
1966	37.0 °C12 May 1966	6.8 °C1 January 1966	23.6 °C	2,055 mm	131
1965	36.6 °C14 May 1965	7.0 °C17 December 1965	23.3 °C	1,829 mm	138
1964	37.6 °C18 June 1964	5.9 °C19 December 1964	23.5 °C	2,337 mm	151
1963	35.8 °C6 September 1963	3.9 °C16 January 1963	23.5 °C	2,012 mm	150
1962	37.7 °C28 May 1962	6.2 °C28 January 1962	23.5 °C	1,514 mm	152
1961	37.8 °C1 June 1961	3.8 °C19 January 1961	23.9 °C	1,953 mm	154
1960	38.5 °C5 May 1960	5.6 °C2 January 1960	24.0 °C	1,990 mm	156
1959	38.0 °C12 June 1959	7.3 °C14 January 1959	23.8 °C	1,679 mm	168
1958	39.7 °C10 May 1958	5.8 °C2 February 1958	23.9 °C	1,517 mm	167
1957	38.4 °C12 May 1957	4.8 °C14 February 1957	23.8 °C	1,686 mm	158
1956	36.9 °C4 September 1956	7.4 °C28 November 1956	23.5 °C	1,781 mm	151
1955	37.5 °C16 April 1955	3.0 °C12 January 1955	23.5 °C	1,666 mm	150
1954	38.8 °C23 July 1954	6.3 °C17 December 1954	24.2 °C	1,435 mm	145
1953	37.9 °C26 June 1953	7.4 °C13 December 1953	23.9 °C	1,954 mm	152
1952	37.6 °C11 July 1952	6.4 °C19 February 1952	24.2 °C	2,482 mm	146
1951	35.4 °C17 May 1951	7.2 °C13 January 1951	23.6 °C	2,139 mm	137
1950	37.2 °C21 April 1950	8.9 °C14 February 1950	23.9 °C	2,109 mm	147
1949	40.5 °C14 June 1949	4.9 °C10 January 1949	24.3 °C	1,543 mm	146
1948	36.5 °C1 July 1948	6.9 °C4 January 1948	23.7 °C	1,759 mm	132
1947	36.6 °C14 June 1947	6.9 °C21 December 1947	23.3 °C	1,612 mm	126
1946	41.0 °C30 July 1946	6.6 °C8 January 1946	25.2 °C	919 mm	171
1945	35.1 °C22 June 1945	5.5 °C18 January 1945	22.3 °C	1,924 mm	104
1944	37.2 °C8 April 1944	3.8 °C21 December 1944	23.2 °C	2,038 mm	126
1943	35.7 °C28 May 1943	5.8 °C13 January 1943	22.9 °C	1,763 mm	110
1942	35.5 °C24 May 1942	7.9 °C7 December 1942	23.1 °C	2,370 mm	110
1941	34.8 °C26 April 1941	8.2 °C4 February 1941	23.4 °C	1,944 mm	124
1940	35.3 °C15 May 1940	7.0 °C25 January 1940	23.0 °C	2,081 mm	111

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

28.2 °C

+0.5 °C

Hot days (≥ 30 °C)

166 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2182 mm

+283 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	22.8 °C	+2.6 °C	12 mm	-25 mm
Feb	19.6 °C	-1.8 °C	38 mm	+1 mm
Mar	24.7 °C	0.0 °C	35 mm	-23 mm
Apr	29.5 °C	+0.8 °C	82 mm	-22 mm
May	31.3 °C	-0.4 °C	300 mm	+56 mm
Jun	33.5 °C	+0.5 °C	377 mm	+89 mm
Jul	33.6 °C	+0.4 °C	307 mm	+23 mm
Aug	32.6 °C	+0.3 °C	352 mm	-11 mm
Sep	32.6 °C	+1.3 °C	370 mm	+112 mm
Oct	29.6 °C	+0.7 °C	193 mm	+47 mm
Nov	24.6 °C	-1.0 °C	69 mm	+15 mm
Dec	23.7 °C	+1.8 °C	49 mm	+22 mm

The year's extremes

Hottest day

39.2 °C

1 Jun 2025

Coldest day

7.6 °C

13 Jan 2025

Wettest day

81.0 mm

29 Sep 2025

Windiest day

36.9 km/h

22 Jul 2025

Strongest gust

72.4 km/h

22 Jul 2025

Hottest feels-like

46.6 °C

2 Jun 2025

Coldest feels-like

5.7 °C

13 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 Bac Ninh?

Bac Ninh has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.9 °C and it receives 1,899 mm of precipitation per year.

What is the hottest day ever recorded in Bac Ninh?

The hottest day measured in Bac Ninh between 1940 and 2025 was 30 July 1946, reaching 41.0 °C.

What is the coldest day in Bac Ninh?

The coldest day measured in Bac Ninh between 1940 and 2025 was 2 January 1974, at 2.9 °C.

Does it snow in Bac Ninh?

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

Has the climate of Bac Ninh warmed?

Yes: Bac Ninh warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Bac Ninh?

The wettest day measured in Bac Ninh between 1940 and 2025 was 31 August 1975, with 208 mm of rain in 24 hours.

What was the windiest day in Bac Ninh?

The windiest day measured in Bac Ninh between 1940 and 2025 was 7 September 2024, with winds reaching 49.1 km/h.

What is the warmest month in Bac Ninh?

The warmest month in Bac Ninh is July (29.4 °C on average); the coldest is January (16.6 °C).

How much does it rain in Bac Ninh?

Bac Ninh receives on average 1,899 mm of precipitation per year, spread over about 178 rainy days.

Is it sunny in Bac Ninh?

Bac Ninh gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.

Are there tropical nights in Bac Ninh?

Yes: Bac Ninh has on average 228 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Bac Ninh?

In Bac Ninh, between 1940 and 2025, the highest apparent temperature reached 48.2 °C on 30 May 2015, and the lowest was -0.5 °C on 12 January 1955.

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