Lai Chau climate — normals and trends

Q: What is the climate of Lai Chau?

Lai Chau has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 19.3 °C and it receives 2,174 mm of precipitation per year.

Q: What is the hottest day ever recorded in Lai Chau?

The hottest day measured in Lai Chau between 1940 and 2025 was 28 April 2024, reaching 35.8 °C.

Q: What is the coldest day in Lai Chau?

The coldest day measured in Lai Chau between 1940 and 2025 was 2 January 1974, at -0.8 °C.

Q: Does it snow in Lai Chau?

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

Q: Has the climate of Lai Chau warmed?

Yes: Lai Chau warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Lai Chau?

The wettest day measured in Lai Chau between 1940 and 2025 was 13 August 1989, with 174 mm of rain in 24 hours.

Q: What was the windiest day in Lai Chau?

The windiest day measured in Lai Chau between 1940 and 2025 was 16 March 1996, with winds reaching 16.8 km/h.

Q: What is the warmest month in Lai Chau?

The warmest month in Lai Chau is June (23.3 °C on average); the coldest is January (12.9 °C).

Q: How much does it rain in Lai Chau?

Lai Chau receives on average 2,174 mm of precipitation per year, spread over about 227 rainy days.

Q: Is it sunny in Lai Chau?

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

Lai Chau (Vietnam) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 19.3 °C and it receives 2,174 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 (23.3 °C on average) and the coldest is January (12.9 °C). Rainfall peaks in August.

Lai Chau averages 0 frost days, 15 hot days (≥ 30 °C) and 227 rainy days per year.

Lai Chau has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.

The hottest day of the period reached 35.8 °C (on 28 April 2024) and the coldest -0.8 °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

Lai ChauLai Châu Province

coords: 22.40°, 103.46°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJuneColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

19.3°C

Average daily high

23.7°C

Average daily low

15.9°C

Annual rainfall

2,174mm

Sunshine / day

8.0h

Mean relative humidity

83%

Average peak wind

5.4km/h

Seasonal range

10.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

15 d/yr

Rainy days (≥ 1 mm)

227 d/yr

Annual snowfall

0.1 cm

Average feels-like high

26.0 °C

Average feels-like low

17.5 °C

Average peak gust

29.3 km/h

Tropical nights (≥ 20 °C)

97 d/yr

Solar radiation

14.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.0 °C

since 1940

+0.2 °C per decade · r² = 0.73 · 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

35.8 °C

28 April 2024

Coldest day

-0.8 °C

2 January 1974

Wettest day

174 mm

13 August 1989

Windiest day

16.8 km/h

16 March 1996

Strongest gust

92.2 km/h

8 June 1946

Hottest feels-like

39.8 °C

26 July 2024

Coldest feels-like

-3.4 °C

2 January 1974

Snowiest day

5.8 cm

28 December 1983

Sunniest day

13.2 h

14 June 1970

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	32.1 °C8 May 2025	4.5 °C12 January 2025	20.0 °C	2,346 mm	32	0
2024	35.8 °C28 April 2024	6.0 °C24 January 2024	20.9 °C	2,484 mm	44	0
2023	35.1 °C19 April 2023	4.1 °C30 January 2023	20.8 °C	1,652 mm	55	0
2022	32.5 °C25 July 2022	5.3 °C19 December 2022	19.9 °C	1,944 mm	28	0
2021	32.3 °C22 May 2021	2.4 °C10 January 2021	20.0 °C	2,082 mm	40	0
2020	32.3 °C27 August 2020	6.1 °C26 January 2020	20.0 °C	1,977 mm	32	0
2019	34.2 °C19 May 2019	1.8 °C8 December 2019	20.6 °C	1,867 mm	58	0
2018	31.9 °C22 July 2018	4.5 °C4 February 2018	19.9 °C	2,201 mm	20	0
2017	32.8 °C30 July 2017	2.7 °C21 December 2017	20.1 °C	2,316 mm	27	0
2016	32.7 °C25 August 2016	1.7 °C25 January 2016	20.3 °C	1,831 mm	37	0
2015	33.6 °C8 May 2015	5.4 °C15 January 2015	20.6 °C	2,019 mm	47	0
2014	32.4 °C24 May 2014	2.4 °C22 January 2014	20.3 °C	1,966 mm	45	0
2013	32.2 °C16 May 2013	3.2 °C18 December 2013	19.9 °C	2,157 mm	35	0
2012	33.7 °C4 May 2012	5.2 °C31 December 2012	20.3 °C	1,950 mm	33	0
2011	31.7 °C29 July 2011	5.8 °C12 January 2011	19.1 °C	1,603 mm	13	0
2010	33.6 °C12 April 2010	6.3 °C19 February 2010	20.7 °C	1,687 mm	45	0
2009	31.4 °C13 August 2009	5.8 °C17 January 2009	20.3 °C	1,633 mm	31	0
2008	32.8 °C23 September 2008	3.6 °C14 February 2008	19.4 °C	2,405 mm	17	0
2007	32.2 °C2 April 2007	4.2 °C29 January 2007	19.8 °C	1,719 mm	18	0
2006	31.3 °C26 July 2006	3.6 °C23 December 2006	20.0 °C	1,975 mm	23	0
2005	31.7 °C30 July 2005	5.0 °C1 January 2005	19.7 °C	2,050 mm	19	0
2004	32.6 °C1 July 2004	4.1 °C9 February 2004	19.4 °C	2,087 mm	15	0
2003	32.7 °C7 May 2003	4.5 °C7 January 2003	20.1 °C	1,745 mm	19	0
2002	31.3 °C28 March 2002	6.1 °C5 January 2002	20.0 °C	2,429 mm	16	0
2001	31.2 °C10 April 2001	3.8 °C26 December 2001	19.9 °C	1,954 mm	14	0
2000	30.4 °C24 August 2000	4.4 °C31 January 2000	19.7 °C	1,933 mm	7	0
1999	31.5 °C6 June 1999	-0.4 °C27 December 1999	19.8 °C	1,892 mm	4	1
1998	31.9 °C18 March 1998	4.1 °C16 December 1998	20.2 °C	2,044 mm	21	0
1997	32.0 °C8 May 1997	7.0 °C25 January 1997	19.5 °C	2,326 mm	9	0
1996	30.5 °C8 September 1996	1.3 °C1 January 1996	19.3 °C	2,177 mm	7	0
1995	31.2 °C25 May 1995	1.6 °C31 December 1995	19.3 °C	2,341 mm	10	0
1994	31.6 °C26 May 1994	5.1 °C22 January 1994	19.7 °C	2,562 mm	9	0
1993	30.9 °C5 June 1993	1.6 °C30 January 1993	19.1 °C	2,211 mm	5	0
1992	32.3 °C8 May 1992	6.0 °C8 December 1992	19.1 °C	2,281 mm	22	0
1991	31.5 °C10 April 1991	5.6 °C29 December 1991	19.7 °C	2,524 mm	10	0
1990	31.7 °C22 April 1990	5.1 °C1 February 1990	19.3 °C	2,303 mm	18	0
1989	32.3 °C21 April 1989	5.1 °C15 January 1989	19.1 °C	2,521 mm	16	0
1988	31.5 °C13 June 1988	5.8 °C20 February 1988	19.5 °C	1,882 mm	18	0
1987	31.4 °C13 May 1987	3.5 °C26 December 1987	19.7 °C	1,821 mm	17	0
1986	31.6 °C2 April 1986	2.3 °C11 January 1986	19.2 °C	2,500 mm	21	0
1985	31.7 °C7 May 1985	2.2 °C25 December 1985	18.8 °C	2,543 mm	3	0
1984	32.0 °C4 April 1984	4.2 °C9 January 1984	19.1 °C	2,078 mm	11	0
1983	32.4 °C24 May 1983	2.3 °C28 December 1983	19.0 °C	2,620 mm	25	0
1982	30.9 °C17 July 1982	0.7 °C27 December 1982	19.3 °C	2,332 mm	4	0
1981	31.0 °C19 August 1981	5.0 °C12 January 1981	19.4 °C	2,900 mm	7	0
1980	31.7 °C3 May 1980	4.9 °C9 February 1980	19.6 °C	2,315 mm	14	0
1979	31.1 °C13 May 1979	6.2 °C14 January 1979	19.3 °C	1,864 mm	7	0
1978	32.2 °C27 August 1978	4.1 °C17 December 1978	19.1 °C	2,537 mm	8	0
1977	31.0 °C17 April 1977	4.9 °C31 January 1977	18.7 °C	2,458 mm	7	0
1976	30.3 °C25 August 1976	1.7 °C1 January 1976	18.6 °C	2,485 mm	4	0
1975	30.8 °C28 April 1975	-0.5 °C31 December 1975	19.0 °C	2,307 mm	5	3
1974	30.3 °C21 August 1974	-0.8 °C2 January 1974	18.8 °C	2,155 mm	3	4
1973	32.0 °C9 April 1973	1.3 °C31 December 1973	19.4 °C	2,444 mm	7	0
1972	31.1 °C9 July 1972	3.6 °C10 February 1972	19.0 °C	2,798 mm	10	0
1971	30.5 °C18 June 1971	1.5 °C6 January 1971	18.4 °C	2,761 mm	2	0
1970	31.8 °C12 May 1970	5.4 °C31 January 1970	19.1 °C	2,288 mm	10	0
1969	33.6 °C15 May 1969	3.6 °C30 November 1969	19.2 °C	2,112 mm	16	0
1968	31.4 °C26 July 1968	2.2 °C14 February 1968	18.9 °C	2,459 mm	9	0
1967	31.4 °C30 August 1967	2.3 °C17 January 1967	18.8 °C	2,168 mm	12	0
1966	31.0 °C29 April 1966	6.0 °C28 December 1966	18.8 °C	2,081 mm	3	0
1965	30.6 °C15 July 1965	3.8 °C31 December 1965	18.4 °C	2,371 mm	3	0
1964	31.1 °C28 May 1964	2.7 °C26 February 1964	18.9 °C	2,103 mm	4	0
1963	31.9 °C6 September 1963	3.0 °C28 January 1963	19.0 °C	2,518 mm	19	0
1962	30.9 °C30 May 1962	4.0 °C4 January 1962	19.0 °C	2,160 mm	14	0
1961	31.6 °C22 June 1961	0.1 °C17 January 1961	19.2 °C	2,810 mm	14	0
1960	33.0 °C27 April 1960	3.5 °C3 January 1960	19.5 °C	2,346 mm	20	0
1959	31.4 °C11 April 1959	3.4 °C11 January 1959	19.1 °C	2,296 mm	10	0
1958	34.9 °C25 April 1958	3.6 °C1 February 1958	19.4 °C	2,331 mm	26	0
1957	33.5 °C14 May 1957	2.9 °C13 February 1957	19.4 °C	1,956 mm	30	0
1956	33.5 °C19 April 1956	2.9 °C10 January 1956	18.8 °C	1,832 mm	9	0
1955	31.2 °C17 April 1955	2.3 °C13 January 1955	18.5 °C	1,919 mm	4	0
1954	32.2 °C17 April 1954	2.7 °C17 December 1954	19.0 °C	1,785 mm	5	0
1953	31.1 °C13 August 1953	4.8 °C13 December 1953	19.1 °C	1,812 mm	3	0
1952	31.1 °C7 May 1952	4.8 °C13 December 1952	19.1 °C	2,149 mm	4	0
1951	30.8 °C10 April 1951	6.5 °C14 January 1951	18.7 °C	2,293 mm	1	0
1950	31.0 °C22 April 1950	5.7 °C7 January 1950	18.7 °C	2,137 mm	8	0
1949	30.1 °C9 July 1949	4.3 °C10 January 1949	18.9 °C	2,016 mm	1	0
1948	30.5 °C14 March 1948	2.5 °C4 January 1948	18.3 °C	2,140 mm	3	0
1947	30.2 °C17 May 1947	2.7 °C21 December 1947	18.3 °C	1,901 mm	1	0
1946	32.2 °C18 March 1946	1.9 °C11 January 1946	18.6 °C	2,020 mm	6	0
1945	28.4 °C28 May 1945	3.8 °C9 February 1945	17.7 °C	2,031 mm	0	0
1944	30.3 °C9 April 1944	3.2 °C21 December 1944	18.2 °C	2,118 mm	1	0
1943	31.3 °C24 March 1943	4.1 °C11 December 1943	18.0 °C	2,249 mm	3	0
1942	32.4 °C18 April 1942	4.7 °C8 December 1942	18.2 °C	2,635 mm	5	0
1941	30.8 °C23 March 1941	4.5 °C4 February 1941	18.6 °C	2,147 mm	3	0
1940	28.9 °C1 September 1940	2.6 °C1 January 1940	18.2 °C	1,814 mm	0	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

24.5 °C

+0.8 °C

Hot days (≥ 30 °C)

32 d/yr

+17

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2346 mm

+172 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	18.1 °C	+0.4 °C	15 mm	-39 mm
Feb	19.4 °C	-0.2 °C	59 mm	-9 mm
Mar	23.4 °C	0.0 °C	44 mm	-68 mm
Apr	25.9 °C	+0.1 °C	110 mm	-40 mm
May	27.7 °C	+0.8 °C	171 mm	-59 mm
Jun	27.1 °C	+0.3 °C	452 mm	+99 mm
Jul	28.4 °C	+1.6 °C	529 mm	+148 mm
Aug	27.8 °C	+0.8 °C	359 mm	-33 mm
Sep	27.8 °C	+1.2 °C	323 mm	+98 mm
Oct	25.8 °C	+1.4 °C	187 mm	+74 mm
Nov	21.4 °C	0.0 °C	85 mm	+29 mm
Dec	20.5 °C	+2.2 °C	12 mm	-27 mm

The year's extremes

Hottest day

32.1 °C

8 May 2025

Coldest day

4.5 °C

12 Jan 2025

Wettest day

94.8 mm

1 Jul 2025

Windiest day

12.8 km/h

4 Mar 2025

Strongest gust

66.6 km/h

29 Sep 2025

Hottest feels-like

38.1 °C

14 Jun 2025

Coldest feels-like

2.8 °C

12 Jan 2025

Sunniest day

12.9 h

13 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 Lai Chau?

Lai Chau has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 19.3 °C and it receives 2,174 mm of precipitation per year.

What is the hottest day ever recorded in Lai Chau?

The hottest day measured in Lai Chau between 1940 and 2025 was 28 April 2024, reaching 35.8 °C.

What is the coldest day in Lai Chau?

The coldest day measured in Lai Chau between 1940 and 2025 was 2 January 1974, at -0.8 °C.

Does it snow in Lai Chau?

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

Has the climate of Lai Chau warmed?

Yes: Lai Chau warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Lai Chau?

The wettest day measured in Lai Chau between 1940 and 2025 was 13 August 1989, with 174 mm of rain in 24 hours.

What was the windiest day in Lai Chau?

The windiest day measured in Lai Chau between 1940 and 2025 was 16 March 1996, with winds reaching 16.8 km/h.

What is the warmest month in Lai Chau?

The warmest month in Lai Chau is June (23.3 °C on average); the coldest is January (12.9 °C).

How much does it rain in Lai Chau?

Lai Chau receives on average 2,174 mm of precipitation per year, spread over about 227 rainy days.

Is it sunny in Lai Chau?

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

What is the biggest single-day snowfall in Lai Chau?

The heaviest 24-hour snowfall measured in Lai Chau between 1940 and 2025 was 28 December 1983, with 5.8 cm.

Are there tropical nights in Lai Chau?

Yes: Lai Chau has on average 97 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Lai Chau?

In Lai Chau, between 1940 and 2025, the highest apparent temperature reached 39.8 °C on 26 July 2024, and the lowest was -3.4 °C on 2 January 1974.

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