Chũ climate — normals and trends

Q: What is the climate of Chũ?

Chũ has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.2 °C and it receives 1,865 mm of precipitation per year.

Q: What is the hottest day ever recorded in Chũ?

The hottest day measured in Chũ between 1940 and 2025 was 28 July 1946, reaching 40.3 °C.

Q: What is the coldest day in Chũ?

The coldest day measured in Chũ between 1940 and 2025 was 12 January 1955, at 2.0 °C.

Q: Does it snow in Chũ?

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

Q: Has the climate of Chũ warmed?

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

Q: What is the wettest day in Chũ?

The wettest day measured in Chũ between 1940 and 2025 was 31 August 1975, with 296 mm of rain in 24 hours.

Q: What was the windiest day in Chũ?

The windiest day measured in Chũ between 1940 and 2025 was 7 September 2024, with winds reaching 48.4 km/h.

Q: What is the warmest month in Chũ?

The warmest month in Chũ is July (28.6 °C on average); the coldest is January (16.0 °C).

Q: How much does it rain in Chũ?

Chũ receives on average 1,865 mm of precipitation per year, spread over about 185 rainy days.

Q: Is it sunny in Chũ?

Chũ gets on average 7.1 hours of sunshine per day, roughly 2,592 hours per year over 1940-2025.

Chũ (Vietnam) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 23.2 °C and it receives 1,865 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 (28.6 °C on average) and the coldest is January (16.0 °C). Rainfall peaks in August.

Chũ averages 0 frost days, 133 hot days (≥ 30 °C) and 185 rainy days per year.

Chũ has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.3 °C (on 28 July 1946) and the coldest 2.0 °C (on 12 January 1955).

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

ChũBac Ninh

coords: 21.37°, 106.57°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJulyColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

23.2°C

Average daily high

26.9°C

Average daily low

20.4°C

Annual rainfall

1,865mm

Sunshine / day

7.1h

Mean relative humidity

81%

Average peak wind

12.7km/h

Seasonal range

12.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

133 d/yr

Rainy days (≥ 1 mm)

185 d/yr

Annual snowfall

0.0 cm

Average feels-like high

30.4 °C

Average feels-like low

22.8 °C

Average peak gust

30.1 km/h

Tropical nights (≥ 20 °C)

216 d/yr

Solar radiation

13.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.1 °C

since 1940

+0.1 °C per decade · r² = 0.33 · 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

40.3 °C

28 July 1946

Coldest day

2.0 °C

12 January 1955

Wettest day

296 mm

31 August 1975

Windiest day

48.4 km/h

7 September 2024

Strongest gust

121.7 km/h

7 September 2024

Hottest feels-like

46.9 °C

30 May 2015

Coldest feels-like

-1.5 °C

12 January 1955

Sunniest day

13.1 h

24 June 1956

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	37.9 °C1 June 2025	6.7 °C13 January 2025	23.8 °C	2,148 mm	150
2024	38.0 °C30 April 2024	7.3 °C24 January 2024	24.6 °C	2,233 mm	175
2023	37.4 °C6 May 2023	6.5 °C30 January 2023	24.4 °C	1,589 mm	158
2022	36.1 °C21 June 2022	6.8 °C20 February 2022	23.5 °C	2,053 mm	145
2021	38.1 °C20 June 2021	6.8 °C2 January 2021	24.1 °C	1,625 mm	153
2020	37.6 °C21 May 2020	9.3 °C31 January 2020	24.2 °C	1,694 mm	137
2019	37.5 °C19 May 2019	8.4 °C10 December 2019	24.5 °C	1,681 mm	156
2018	37.5 °C6 July 2018	6.4 °C30 December 2018	23.8 °C	2,078 mm	143
2017	39.1 °C3 June 2017	9.9 °C18 December 2017	23.8 °C	2,164 mm	140
2016	37.1 °C3 June 2016	4.0 °C24 January 2016	23.9 °C	1,724 mm	166
2015	38.2 °C30 May 2015	8.0 °C14 January 2015	24.4 °C	1,879 mm	167
2014	36.9 °C24 May 2014	4.7 °C23 January 2014	23.5 °C	2,086 mm	154
2013	38.1 °C16 May 2013	4.9 °C20 December 2013	23.2 °C	2,096 mm	138
2012	37.9 °C4 May 2012	7.5 °C5 January 2012	23.3 °C	2,010 mm	150
2011	36.6 °C7 July 2011	6.1 °C26 December 2011	22.3 °C	1,618 mm	125
2010	37.1 °C20 May 2010	7.9 °C27 December 2010	23.8 °C	1,973 mm	150
2009	36.5 °C21 June 2009	5.6 °C11 January 2009	23.8 °C	1,498 mm	155
2008	35.7 °C23 June 2008	5.3 °C2 February 2008	22.7 °C	2,080 mm	137
2007	37.2 °C9 June 2007	6.8 °C29 January 2007	23.5 °C	1,547 mm	136
2006	35.6 °C6 June 2006	7.6 °C23 December 2006	23.7 °C	1,487 mm	161
2005	36.3 °C13 June 2005	7.3 °C2 January 2005	23.3 °C	1,505 mm	151
2004	37.0 °C3 July 2004	5.4 °C9 February 2004	23.1 °C	1,481 mm	135
2003	37.6 °C6 May 2003	6.2 °C7 January 2003	24.0 °C	1,673 mm	165
2002	35.9 °C21 May 2002	5.8 °C27 December 2002	23.5 °C	1,947 mm	152
2001	36.7 °C21 April 2001	4.4 °C24 December 2001	23.2 °C	2,086 mm	131
2000	35.6 °C23 August 2000	6.2 °C2 February 2000	23.3 °C	1,792 mm	137
1999	35.3 °C6 June 1999	2.9 °C24 December 1999	23.4 °C	1,617 mm	150
1998	36.8 °C15 June 1998	8.9 °C20 January 1998	24.2 °C	1,441 mm	154
1997	37.3 °C9 June 1997	7.4 °C12 January 1997	23.4 °C	2,409 mm	126
1996	37.1 °C6 May 1996	4.8 °C21 February 1996	22.9 °C	2,019 mm	137
1995	36.2 °C22 June 1995	5.6 °C31 December 1995	23.0 °C	1,820 mm	123
1994	38.2 °C3 May 1994	8.7 °C23 January 1994	23.4 °C	2,264 mm	113
1993	36.9 °C4 June 1993	4.4 °C31 January 1993	23.2 °C	1,809 mm	146
1992	36.8 °C8 May 1992	7.1 °C17 January 1992	22.9 °C	1,681 mm	125
1991	36.2 °C24 May 1991	4.7 °C28 December 1991	23.7 °C	1,378 mm	146
1990	37.6 °C22 April 1990	7.8 °C1 February 1990	23.4 °C	2,065 mm	128
1989	35.8 °C18 June 1989	7.2 °C13 January 1989	22.9 °C	1,807 mm	125
1988	37.9 °C24 May 1988	7.2 °C19 February 1988	22.9 °C	1,813 mm	127
1987	37.0 °C21 May 1987	5.5 °C8 December 1987	24.0 °C	1,880 mm	154
1986	37.2 °C2 July 1986	4.8 °C3 March 1986	23.1 °C	2,198 mm	126
1985	36.7 °C27 May 1985	6.6 °C24 December 1985	22.6 °C	2,000 mm	144
1984	36.1 °C19 March 1984	5.3 °C9 January 1984	22.7 °C	1,693 mm	125
1983	37.7 °C18 June 1983	4.5 °C23 January 1983	22.9 °C	1,597 mm	149
1982	36.0 °C1 June 1982	2.4 °C27 December 1982	23.2 °C	2,131 mm	120
1981	36.5 °C25 August 1981	6.5 °C14 January 1981	23.4 °C	2,665 mm	143
1980	36.6 °C31 May 1980	6.5 °C8 February 1980	23.3 °C	2,062 mm	139
1979	36.1 °C15 July 1979	9.2 °C26 December 1979	23.4 °C	2,015 mm	147
1978	35.5 °C25 June 1978	6.7 °C22 January 1978	22.9 °C	2,829 mm	115
1977	36.5 °C9 June 1977	4.9 °C31 January 1977	22.9 °C	1,754 mm	132
1976	35.8 °C17 June 1976	5.9 °C13 January 1976	22.4 °C	1,750 mm	123
1975	35.6 °C30 July 1975	2.4 °C31 December 1975	22.9 °C	2,533 mm	135
1974	37.1 °C2 June 1974	2.4 °C2 January 1974	23.0 °C	1,798 mm	150
1973	38.3 °C8 April 1973	3.6 °C27 December 1973	23.8 °C	2,664 mm	138
1972	37.1 °C10 May 1972	5.5 °C16 January 1972	23.1 °C	2,198 mm	149
1971	36.9 °C18 June 1971	4.2 °C10 January 1971	22.7 °C	1,810 mm	126
1970	36.7 °C12 May 1970	6.1 °C31 January 1970	22.9 °C	1,616 mm	137
1969	39.0 °C13 May 1969	6.2 °C11 December 1969	23.3 °C	1,307 mm	165
1968	36.7 °C24 May 1968	5.1 °C14 February 1968	23.2 °C	1,827 mm	128
1967	38.1 °C6 July 1967	3.2 °C18 January 1967	22.7 °C	1,458 mm	130
1966	36.3 °C12 May 1966	6.3 °C27 December 1966	23.0 °C	1,968 mm	112
1965	35.4 °C20 July 1965	4.8 °C17 December 1965	22.7 °C	1,922 mm	104
1964	35.8 °C8 August 1964	4.7 °C19 December 1964	22.9 °C	1,902 mm	129
1963	35.0 °C6 September 1963	2.9 °C16 January 1963	22.8 °C	1,981 mm	129
1962	36.3 °C28 May 1962	5.3 °C28 January 1962	22.8 °C	1,641 mm	139
1961	36.3 °C1 June 1961	3.1 °C18 January 1961	23.3 °C	1,744 mm	130
1960	36.2 °C27 April 1960	5.1 °C3 January 1960	23.3 °C	1,834 mm	134
1959	36.2 °C12 June 1959	6.8 °C14 January 1959	23.0 °C	1,653 mm	128
1958	38.8 °C2 June 1958	4.5 °C2 February 1958	23.2 °C	1,606 mm	141
1957	37.4 °C12 May 1957	4.4 °C14 February 1957	23.2 °C	1,624 mm	141
1956	36.9 °C19 April 1956	6.4 °C8 January 1956	22.8 °C	1,614 mm	125
1955	35.9 °C15 April 1955	2.0 °C12 January 1955	22.9 °C	1,468 mm	115
1954	36.9 °C18 June 1954	5.8 °C17 December 1954	23.5 °C	1,356 mm	121
1953	35.7 °C15 July 1953	6.0 °C13 December 1953	23.3 °C	1,931 mm	117
1952	35.9 °C11 July 1952	5.1 °C19 February 1952	23.5 °C	2,318 mm	116
1951	34.6 °C10 April 1951	4.9 °C13 January 1951	23.0 °C	2,179 mm	96
1950	35.6 °C21 April 1950	8.5 °C7 January 1950	23.2 °C	1,911 mm	110
1949	39.2 °C14 June 1949	4.8 °C10 January 1949	23.6 °C	1,437 mm	122
1948	35.2 °C16 July 1948	5.3 °C4 January 1948	23.0 °C	1,811 mm	108
1947	35.1 °C13 June 1947	5.9 °C21 December 1947	22.6 °C	1,608 mm	93
1946	40.3 °C28 July 1946	5.6 °C8 January 1946	24.4 °C	920 mm	157
1945	33.9 °C21 May 1945	4.6 °C18 January 1945	21.7 °C	2,069 mm	84
1944	37.1 °C8 April 1944	3.9 °C22 December 1944	22.5 °C	2,145 mm	88
1943	35.9 °C29 May 1943	5.1 °C13 January 1943	22.3 °C	1,832 mm	83
1942	34.0 °C6 August 1942	7.0 °C14 December 1942	22.5 °C	2,368 mm	77
1941	35.0 °C26 April 1941	7.6 °C4 February 1941	22.7 °C	1,871 mm	97
1940	34.3 °C16 May 1940	6.2 °C25 January 1940	22.3 °C	2,027 mm	82

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

27.4 °C

+0.5 °C

Hot days (≥ 30 °C)

150 d/yr

+17

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2148 mm

+283 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	22.1 °C	+2.5 °C	9 mm	-26 mm
Feb	19.2 °C	-1.4 °C	32 mm	-1 mm
Mar	23.6 °C	-0.3 °C	35 mm	-20 mm
Apr	28.8 °C	+1.0 °C	87 mm	-6 mm
May	30.5 °C	-0.2 °C	238 mm	0 mm
Jun	32.5 °C	+0.5 °C	351 mm	+57 mm
Jul	32.6 °C	+0.5 °C	357 mm	+74 mm
Aug	31.6 °C	+0.2 °C	400 mm	+37 mm
Sep	31.6 °C	+1.1 °C	327 mm	+74 mm
Oct	28.7 °C	+0.5 °C	195 mm	+58 mm
Nov	23.8 °C	-1.2 °C	67 mm	+13 mm
Dec	23.3 °C	+2.0 °C	51 mm	+24 mm

The year's extremes

Hottest day

37.9 °C

1 Jun 2025

Coldest day

6.7 °C

13 Jan 2025

Wettest day

80.1 mm

6 Oct 2025

Windiest day

34.1 km/h

22 Jul 2025

Strongest gust

77.0 km/h

22 Jul 2025

Hottest feels-like

46.0 °C

2 Jun 2025

Coldest feels-like

4.4 °C

13 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 Chũ?

Chũ has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.2 °C and it receives 1,865 mm of precipitation per year.

What is the hottest day ever recorded in Chũ?

The hottest day measured in Chũ between 1940 and 2025 was 28 July 1946, reaching 40.3 °C.

What is the coldest day in Chũ?

The coldest day measured in Chũ between 1940 and 2025 was 12 January 1955, at 2.0 °C.

Does it snow in Chũ?

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

Has the climate of Chũ warmed?

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

What is the wettest day in Chũ?

The wettest day measured in Chũ between 1940 and 2025 was 31 August 1975, with 296 mm of rain in 24 hours.

What was the windiest day in Chũ?

The windiest day measured in Chũ between 1940 and 2025 was 7 September 2024, with winds reaching 48.4 km/h.

What is the warmest month in Chũ?

The warmest month in Chũ is July (28.6 °C on average); the coldest is January (16.0 °C).

How much does it rain in Chũ?

Chũ receives on average 1,865 mm of precipitation per year, spread over about 185 rainy days.

Is it sunny in Chũ?

Chũ gets on average 7.1 hours of sunshine per day, roughly 2,592 hours per year over 1940-2025.

Are there tropical nights in Chũ?

Yes: Chũ has on average 216 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Chũ?

In Chũ, between 1940 and 2025, the highest apparent temperature reached 46.9 °C on 30 May 2015, and the lowest was -1.5 °C on 12 January 1955.

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