Bản Na Hỷ climate — normals and trends

Q: What is the climate of Bản Na Hỷ?

Bản Na Hỷ has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 21.3 °C and it receives 1,426 mm of precipitation per year.

Q: What is the hottest day ever recorded in Bản Na Hỷ?

The hottest day measured in Bản Na Hỷ between 1940 and 2025 was 8 April 1973, reaching 38.0 °C.

Q: What is the coldest day in Bản Na Hỷ?

The coldest day measured in Bản Na Hỷ between 1940 and 2025 was 2 January 1974, at -1.3 °C.

Q: Does it snow in Bản Na Hỷ?

Almost never: Bản Na Hỷ sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Bản Na Hỷ warmed?

Yes: Bản Na Hỷ warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Bản Na Hỷ?

The wettest day measured in Bản Na Hỷ between 1940 and 2025 was 25 July 1963, with 213 mm of rain in 24 hours.

Q: What was the windiest day in Bản Na Hỷ?

The windiest day measured in Bản Na Hỷ between 1940 and 2025 was 23 August 1987, with winds reaching 20.6 km/h.

Q: What is the warmest month in Bản Na Hỷ?

The warmest month in Bản Na Hỷ is June (25.6 °C on average); the coldest is January (15.2 °C).

Q: How much does it rain in Bản Na Hỷ?

Bản Na Hỷ receives on average 1,426 mm of precipitation per year, spread over about 186 rainy days.

Q: Is it sunny in Bản Na Hỷ?

Bản Na Hỷ gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.

Bản Na Hỷ (Vietnam) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 21.3 °C and it receives 1,426 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 June (25.6 °C on average) and the coldest is January (15.2 °C). Rainfall peaks in August.

Bản Na Hỷ averages 0 frost days, 95 hot days (≥ 30 °C) and 186 rainy days per year.

Bản Na Hỷ 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 38.0 °C (on 8 April 1973) and the coldest -1.3 °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

Bản Na HỷNghệ An Province

coords: 19.56°, 104.53°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJuneColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

21.3°C

Average daily high

26.0°C

Average daily low

18.0°C

Annual rainfall

1,426mm

Sunshine / day

7.8h

Mean relative humidity

85%

Average peak wind

7.2km/h

Seasonal range

10.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

95 d/yr

Rainy days (≥ 1 mm)

186 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.3 °C

Average feels-like low

20.2 °C

Average peak gust

28.3 km/h

Tropical nights (≥ 20 °C)

168 d/yr

Solar radiation

15.1 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.2 °C

since 1940

+0.1 °C per decade · r² = 0.38 · 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

38.0 °C

8 April 1973

Coldest day

-1.3 °C

2 January 1974

Wettest day

213 mm

25 July 1963

Windiest day

20.6 km/h

23 August 1987

Strongest gust

106.6 km/h

1 September 1956

Hottest feels-like

43.8 °C

20 May 2019

Coldest feels-like

-4.5 °C

2 January 1974

Sunniest day

13.0 h

13 June 2013

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	34.8 °C4 August 2025	4.9 °C13 January 2025	21.7 °C	1,943 mm	113	0
2024	38.0 °C27 April 2024	8.2 °C24 January 2024	22.7 °C	1,703 mm	120	0
2023	37.0 °C6 May 2023	5.4 °C30 January 2023	22.6 °C	1,326 mm	131	0
2022	34.9 °C28 June 2022	6.3 °C19 December 2022	21.9 °C	1,494 mm	101	0
2021	35.7 °C3 June 2021	5.1 °C3 January 2021	22.1 °C	1,360 mm	121	0
2020	35.9 °C24 June 2020	8.3 °C31 December 2020	22.5 °C	1,342 mm	131	0
2019	37.6 °C20 May 2019	4.1 °C8 December 2019	23.0 °C	1,283 mm	143	0
2018	34.7 °C6 July 2018	5.7 °C4 February 2018	22.1 °C	1,695 mm	101	0
2017	36.3 °C4 June 2017	4.8 °C20 December 2017	22.0 °C	1,516 mm	104	0
2016	34.8 °C2 June 2016	3.3 °C25 January 2016	22.3 °C	1,347 mm	139	0
2015	37.4 °C3 July 2015	4.6 °C14 January 2015	22.6 °C	1,284 mm	138	0
2014	35.5 °C3 June 2014	3.5 °C23 January 2014	21.8 °C	1,302 mm	103	0
2013	35.9 °C16 May 2013	3.8 °C20 December 2013	21.4 °C	1,683 mm	95	0
2012	35.9 °C4 May 2012	6.8 °C26 January 2012	21.8 °C	1,379 mm	110	0
2011	34.2 °C7 July 2011	5.6 °C26 December 2011	20.3 °C	1,664 mm	63	0
2010	35.5 °C5 July 2010	7.3 °C27 December 2010	22.0 °C	1,555 mm	114	0
2009	35.0 °C19 April 2009	3.6 °C11 January 2009	21.8 °C	1,194 mm	105	0
2008	32.9 °C23 September 2008	4.0 °C3 January 2008	20.7 °C	1,541 mm	71	0
2007	36.4 °C2 April 2007	5.4 °C29 January 2007	21.8 °C	1,200 mm	113	0
2006	34.5 °C17 June 2006	4.1 °C23 December 2006	21.7 °C	1,147 mm	85	0
2005	35.2 °C27 May 2005	4.9 °C2 January 2005	21.5 °C	1,745 mm	99	0
2004	33.6 °C3 July 2004	5.4 °C25 January 2004	21.1 °C	1,289 mm	70	0
2003	36.9 °C7 May 2003	5.5 °C22 December 2003	21.9 °C	1,261 mm	127	0
2002	34.0 °C22 May 2002	7.3 °C5 January 2002	21.7 °C	1,512 mm	91	0
2001	35.5 °C10 April 2001	5.8 °C24 December 2001	21.3 °C	1,643 mm	68	0
2000	34.0 °C9 May 2000	6.0 °C2 February 2000	21.2 °C	1,359 mm	70	0
1999	33.6 °C10 March 1999	-0.8 °C24 December 1999	21.3 °C	1,296 mm	96	1
1998	35.5 °C16 June 1998	7.3 °C13 December 1998	22.3 °C	930 mm	110	0
1997	35.2 °C9 June 1997	7.8 °C12 January 1997	21.5 °C	1,409 mm	76	0
1996	34.0 °C7 May 1996	3.5 °C1 January 1996	20.9 °C	1,713 mm	84	0
1995	35.6 °C21 May 1995	4.5 °C30 December 1995	21.1 °C	1,287 mm	79	0
1994	36.0 °C3 May 1994	7.6 °C22 January 1994	21.5 °C	1,576 mm	64	0
1993	35.3 °C5 June 1993	3.3 °C30 January 1993	21.3 °C	1,279 mm	105	0
1992	36.2 °C8 May 1992	6.0 °C3 December 1992	21.1 °C	1,214 mm	97	0
1991	34.6 °C1 May 1991	6.1 °C29 December 1991	21.8 °C	1,248 mm	111	0
1990	37.0 °C22 April 1990	6.3 °C3 December 1990	21.4 °C	1,337 mm	89	0
1989	35.6 °C21 April 1989	6.1 °C2 December 1989	21.0 °C	1,704 mm	88	0
1988	36.4 °C25 May 1988	7.0 °C12 December 1988	21.3 °C	1,306 mm	105	0
1987	35.6 °C21 May 1987	2.8 °C8 December 1987	21.7 °C	1,405 mm	103	0
1986	35.6 °C18 March 1986	4.2 °C7 January 1986	21.1 °C	1,467 mm	91	0
1985	34.8 °C8 June 1985	4.9 °C24 December 1985	20.9 °C	1,364 mm	80	0
1984	35.2 °C4 April 1984	4.4 °C9 January 1984	21.0 °C	1,354 mm	94	0
1983	36.3 °C15 April 1983	3.4 °C25 January 1983	21.0 °C	1,319 mm	108	0
1982	36.0 °C12 May 1982	3.0 °C29 December 1982	21.3 °C	1,772 mm	86	0
1981	34.0 °C11 May 1981	5.5 °C21 December 1981	21.5 °C	1,622 mm	92	0
1980	35.4 °C24 April 1980	4.9 °C1 February 1980	21.4 °C	1,663 mm	86	0
1979	35.4 °C13 May 1979	7.2 °C2 February 1979	21.5 °C	1,211 mm	95	0
1978	33.5 °C14 June 1978	6.3 °C16 December 1978	21.1 °C	1,849 mm	78	0
1977	35.0 °C21 May 1977	5.6 °C1 February 1977	20.7 °C	1,308 mm	89	0
1976	33.8 °C18 June 1976	3.4 °C1 January 1976	20.6 °C	1,370 mm	79	0
1975	34.6 °C28 April 1975	-0.4 °C31 December 1975	20.8 °C	1,784 mm	69	1
1974	34.4 °C23 February 1974	-1.3 °C2 January 1974	21.0 °C	1,651 mm	99	2
1973	38.0 °C8 April 1973	1.2 °C31 December 1973	21.8 °C	1,729 mm	125	0
1972	36.4 °C12 May 1972	5.0 °C17 January 1972	21.5 °C	1,540 mm	105	0
1971	35.9 °C18 May 1971	2.8 °C6 January 1971	20.4 °C	1,723 mm	66	0
1970	35.6 °C11 May 1970	7.0 °C20 January 1970	21.1 °C	1,620 mm	95	0
1969	36.8 °C20 May 1969	4.7 °C6 February 1969	21.5 °C	1,245 mm	133	0
1968	35.5 °C19 July 1968	4.9 °C5 January 1968	21.3 °C	1,358 mm	99	0
1967	36.2 °C31 March 1967	0.9 °C18 January 1967	20.8 °C	1,263 mm	118	0
1966	36.9 °C12 May 1966	4.8 °C3 December 1966	21.5 °C	1,288 mm	77	0
1965	36.3 °C13 May 1965	5.6 °C19 January 1965	21.3 °C	1,345 mm	81	0
1964	34.0 °C31 July 1964	3.1 °C19 December 1964	20.8 °C	1,601 mm	85	0
1963	33.1 °C22 April 1963	2.3 °C16 January 1963	20.7 °C	1,763 mm	84	0
1962	34.1 °C8 May 1962	3.8 °C6 December 1962	20.6 °C	1,499 mm	74	0
1961	34.4 °C25 April 1961	1.2 °C19 January 1961	21.2 °C	1,744 mm	78	0
1960	35.3 °C15 June 1960	3.3 °C3 January 1960	21.3 °C	1,518 mm	93	0
1959	34.7 °C10 June 1959	4.3 °C12 January 1959	21.2 °C	1,357 mm	96	0
1958	36.9 °C24 April 1958	4.7 °C5 December 1958	20.9 °C	1,352 mm	98	0
1957	36.8 °C13 May 1957	3.1 °C14 February 1957	21.3 °C	1,543 mm	108	0
1956	36.5 °C19 April 1956	3.3 °C28 November 1956	20.7 °C	1,466 mm	81	0
1955	37.5 °C18 April 1955	-0.7 °C12 January 1955	20.8 °C	1,164 mm	106	1
1954	37.3 °C18 June 1954	2.7 °C17 December 1954	21.6 °C	1,030 mm	127	0
1953	35.7 °C22 July 1953	4.2 °C13 December 1953	21.4 °C	1,789 mm	88	0
1952	35.3 °C30 May 1952	4.2 °C14 December 1952	21.6 °C	1,577 mm	100	0
1951	36.2 °C10 April 1951	6.8 °C14 January 1951	21.2 °C	1,606 mm	89	0
1950	37.0 °C21 April 1950	6.7 °C11 December 1950	21.2 °C	1,273 mm	99	0
1949	37.1 °C5 June 1949	3.6 °C16 January 1949	21.6 °C	1,206 mm	114	0
1948	36.9 °C13 March 1948	2.5 °C3 January 1948	21.1 °C	1,150 mm	92	0
1947	35.5 °C6 May 1947	4.5 °C30 December 1947	20.9 °C	1,063 mm	83	0
1946	36.6 °C2 August 1946	3.5 °C10 January 1946	21.7 °C	739 mm	151	0
1945	33.1 °C13 July 1945	3.3 °C18 January 1945	19.9 °C	1,155 mm	48	0
1944	35.1 °C8 April 1944	1.7 °C21 December 1944	20.7 °C	1,318 mm	62	0
1943	35.7 °C24 March 1943	5.1 °C14 January 1943	20.5 °C	1,257 mm	83	0
1942	34.3 °C15 April 1942	5.2 °C16 December 1942	20.6 °C	1,357 mm	50	0
1941	36.5 °C23 March 1941	6.8 °C3 February 1941	21.1 °C	1,388 mm	72	0
1940	33.9 °C16 May 1940	4.7 °C3 January 1940	20.6 °C	1,412 mm	60	0

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

26.1 °C

+0.1 °C

Hot days (≥ 30 °C)

113 d/yr

+18

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1943 mm

+517 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	20.6 °C	+0.9 °C	8 mm	-15 mm
Feb	20.5 °C	-1.2 °C	50 mm	+28 mm
Mar	25.2 °C	-0.5 °C	33 mm	-10 mm
Apr	28.7 °C	0.0 °C	76 mm	-5 mm
May	29.6 °C	-0.5 °C	155 mm	-3 mm
Jun	30.6 °C	+0.2 °C	194 mm	+21 mm
Jul	29.0 °C	-1.0 °C	467 mm	+269 mm
Aug	29.5 °C	+0.5 °C	351 mm	+78 mm
Sep	29.4 °C	+1.7 °C	420 mm	+164 mm
Oct	26.5 °C	+1.0 °C	84 mm	-55 mm
Nov	21.8 °C	-1.1 °C	70 mm	+30 mm
Dec	21.3 °C	+1.3 °C	33 mm	+14 mm

The year's extremes

Hottest day

34.8 °C

4 Aug 2025

Coldest day

4.9 °C

13 Jan 2025

Wettest day

152.7 mm

22 Jul 2025

Windiest day

17.8 km/h

29 Sep 2025

Strongest gust

87.5 km/h

29 Sep 2025

Hottest feels-like

40.5 °C

7 Jun 2025

Coldest feels-like

2.9 °C

13 Jan 2025

Sunniest day

12.5 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 Bản Na Hỷ?

Bản Na Hỷ has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 21.3 °C and it receives 1,426 mm of precipitation per year.

What is the hottest day ever recorded in Bản Na Hỷ?

The hottest day measured in Bản Na Hỷ between 1940 and 2025 was 8 April 1973, reaching 38.0 °C.

What is the coldest day in Bản Na Hỷ?

The coldest day measured in Bản Na Hỷ between 1940 and 2025 was 2 January 1974, at -1.3 °C.

Does it snow in Bản Na Hỷ?

Almost never: Bản Na Hỷ sees virtually no snow, with about 0 frost days per year.

Has the climate of Bản Na Hỷ warmed?

Yes: Bản Na Hỷ warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Bản Na Hỷ?

The wettest day measured in Bản Na Hỷ between 1940 and 2025 was 25 July 1963, with 213 mm of rain in 24 hours.

What was the windiest day in Bản Na Hỷ?

The windiest day measured in Bản Na Hỷ between 1940 and 2025 was 23 August 1987, with winds reaching 20.6 km/h.

What is the warmest month in Bản Na Hỷ?

The warmest month in Bản Na Hỷ is June (25.6 °C on average); the coldest is January (15.2 °C).

How much does it rain in Bản Na Hỷ?

Bản Na Hỷ receives on average 1,426 mm of precipitation per year, spread over about 186 rainy days.

Is it sunny in Bản Na Hỷ?

Bản Na Hỷ gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.

Are there tropical nights in Bản Na Hỷ?

Yes: Bản Na Hỷ has on average 168 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Bản Na Hỷ?

In Bản Na Hỷ, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 20 May 2019, and the lowest was -4.5 °C on 2 January 1974.

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