Lao Cai climate — normals and trends

Q: What is the climate of Lao Cai?

Lao Cai has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,994 mm of precipitation per year.

Q: What is the hottest day ever recorded in Lao Cai?

The hottest day measured in Lao Cai between 1940 and 2025 was 22 May 2023, reaching 38.2 °C.

Q: What is the coldest day in Lao Cai?

The coldest day measured in Lao Cai between 1940 and 2025 was 2 January 1974, at -0.4 °C.

Q: Does it snow in Lao Cai?

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

Q: Has the climate of Lao Cai warmed?

Yes: Lao Cai warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Lao Cai?

The wettest day measured in Lao Cai between 1940 and 2025 was 13 August 1989, with 185 mm of rain in 24 hours.

Q: What was the windiest day in Lao Cai?

The windiest day measured in Lao Cai between 1940 and 2025 was 3 July 1964, with winds reaching 15.5 km/h.

Q: What is the warmest month in Lao Cai?

The warmest month in Lao Cai is June (25.7 °C on average); the coldest is January (13.4 °C).

Q: How much does it rain in Lao Cai?

Lao Cai receives on average 1,994 mm of precipitation per year, spread over about 237 rainy days.

Q: Is it sunny in Lao Cai?

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

Lao Cai (Vietnam) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.7 °C and it receives 1,994 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 (25.7 °C on average) and the coldest is January (13.4 °C). Rainfall peaks in August.

Lao Cai averages 0 frost days, 68 hot days (≥ 30 °C) and 237 rainy days per year.

Lao Cai has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.2 °C (on 22 May 2023) and the coldest -0.4 °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

Lao CaiLao Cai

coords: 22.49°, 103.97°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJuneColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

20.7°C

Average daily high

24.8°C

Average daily low

17.5°C

Annual rainfall

1,994mm

Sunshine / day

8.0h

Mean relative humidity

83%

Average peak wind

6.6km/h

Seasonal range

12.3°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

68 d/yr

Rainy days (≥ 1 mm)

237 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.7 °C

Average feels-like low

19.5 °C

Average peak gust

25.6 km/h

Tropical nights (≥ 20 °C)

158 d/yr

Solar radiation

13.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.68 · 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

38.2 °C

22 May 2023

Coldest day

-0.4 °C

2 January 1974

Wettest day

185 mm

13 August 1989

Windiest day

15.5 km/h

3 July 1964

Strongest gust

79.2 km/h

17 September 2014

Hottest feels-like

43.1 °C

1 June 2023

Coldest feels-like

-3.4 °C

2 January 1974

Snowiest day

1.7 cm

24 January 2016

Sunniest day

13.3 h

13 June 2013

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.2 °C1 June 2025	5.4 °C28 November 2025	21.2 °C	2,369 mm	82	0
2024	37.8 °C28 April 2024	6.2 °C24 January 2024	22.0 °C	2,467 mm	101	0
2023	38.2 °C22 May 2023	5.6 °C30 January 2023	21.8 °C	1,563 mm	97	0
2022	35.4 °C17 July 2022	6.7 °C21 February 2022	21.2 °C	1,875 mm	85	0
2021	36.4 °C22 May 2021	3.6 °C10 January 2021	21.4 °C	1,869 mm	96	0
2020	36.1 °C21 May 2020	7.5 °C22 December 2020	21.4 °C	1,946 mm	106	0
2019	37.2 °C19 May 2019	3.2 °C8 December 2019	22.0 °C	1,766 mm	116	0
2018	34.6 °C6 July 2018	5.5 °C30 January 2018	21.4 °C	2,039 mm	76	0
2017	35.8 °C3 June 2017	4.8 °C20 December 2017	21.4 °C	2,310 mm	72	0
2016	35.0 °C10 July 2016	3.7 °C25 January 2016	21.8 °C	1,635 mm	105	0
2015	37.1 °C8 May 2015	6.1 °C15 January 2015	22.1 °C	1,767 mm	118	0
2014	36.0 °C24 May 2014	3.5 °C21 January 2014	21.4 °C	1,961 mm	99	0
2013	36.1 °C16 May 2013	5.4 °C17 December 2013	21.2 °C	1,650 mm	98	0
2012	36.9 °C4 May 2012	6.2 °C26 January 2012	21.3 °C	1,807 mm	86	0
2011	34.1 °C31 August 2011	6.6 °C12 January 2011	20.2 °C	1,533 mm	68	0
2010	36.3 °C6 May 2010	7.3 °C17 December 2010	21.8 °C	1,515 mm	109	0
2009	34.3 °C23 March 2009	6.3 °C30 January 2009	21.5 °C	1,461 mm	86	0
2008	35.9 °C24 September 2008	5.2 °C14 February 2008	20.7 °C	2,124 mm	74	0
2007	34.4 °C1 April 2007	4.8 °C29 January 2007	21.1 °C	1,706 mm	77	0
2006	34.1 °C6 May 2006	6.0 °C23 December 2006	21.3 °C	1,875 mm	75	0
2005	34.7 °C19 May 2005	5.9 °C1 January 2005	21.1 °C	1,691 mm	96	0
2004	34.8 °C1 July 2004	4.5 °C10 February 2004	20.8 °C	1,727 mm	73	0
2003	36.8 °C7 May 2003	5.9 °C7 January 2003	21.6 °C	1,591 mm	88	0
2002	34.6 °C1 June 2002	7.3 °C27 December 2002	21.4 °C	1,968 mm	85	0
2001	34.5 °C6 July 2001	5.9 °C27 November 2001	21.2 °C	1,907 mm	79	0
2000	33.6 °C27 July 2000	6.1 °C2 February 2000	20.9 °C	1,925 mm	61	0
1999	34.3 °C6 June 1999	1.0 °C24 December 1999	21.1 °C	1,683 mm	71	0
1998	34.3 °C2 May 1998	6.5 °C16 December 1998	21.7 °C	1,681 mm	87	0
1997	34.5 °C8 June 1997	7.9 °C1 January 1997	21.0 °C	2,295 mm	65	0
1996	34.5 °C6 May 1996	2.8 °C1 January 1996	20.5 °C	2,034 mm	59	0
1995	35.0 °C20 May 1995	3.3 °C31 December 1995	20.7 °C	2,089 mm	61	0
1994	35.3 °C2 May 1994	5.4 °C22 January 1994	21.1 °C	2,432 mm	67	0
1993	33.9 °C1 June 1993	1.9 °C28 December 1993	20.7 °C	1,729 mm	77	0
1992	34.9 °C1 September 1992	7.7 °C16 January 1992	20.5 °C	1,981 mm	88	0
1991	35.0 °C10 April 1991	6.8 °C29 December 1991	21.1 °C	2,282 mm	69	0
1990	35.8 °C22 August 1990	5.7 °C1 February 1990	21.0 °C	1,982 mm	75	0
1989	34.5 °C21 April 1989	6.0 °C3 December 1989	20.5 °C	2,142 mm	68	0
1988	35.1 °C21 May 1988	5.7 °C12 December 1988	20.6 °C	2,204 mm	75	0
1987	34.6 °C25 May 1987	3.5 °C24 December 1987	21.3 °C	1,740 mm	83	0
1986	34.9 °C2 July 1986	2.7 °C11 January 1986	20.6 °C	2,395 mm	74	0
1985	34.5 °C6 May 1985	3.7 °C24 December 1985	20.3 °C	2,174 mm	60	0
1984	34.7 °C14 June 1984	4.5 °C23 January 1984	20.4 °C	1,613 mm	73	0
1983	36.3 °C24 May 1983	3.8 °C2 December 1983	20.5 °C	2,149 mm	88	0
1982	34.0 °C12 May 1982	2.4 °C27 December 1982	20.8 °C	2,149 mm	63	0
1981	33.9 °C9 August 1981	6.3 °C27 December 1981	21.0 °C	2,440 mm	85	0
1980	35.1 °C3 May 1980	4.7 °C9 February 1980	20.9 °C	2,123 mm	66	0
1979	34.0 °C13 May 1979	6.8 °C12 January 1979	20.7 °C	1,658 mm	60	0
1978	34.6 °C27 August 1978	5.0 °C18 December 1978	20.6 °C	2,528 mm	59	0
1977	34.5 °C31 May 1977	3.2 °C31 January 1977	20.4 °C	2,017 mm	74	0
1976	34.0 °C17 June 1976	3.9 °C1 January 1976	20.1 °C	2,214 mm	66	0
1975	33.9 °C17 August 1975	0.0 °C24 December 1975	20.5 °C	1,950 mm	72	0
1974	34.2 °C8 April 1974	-0.4 °C2 January 1974	20.3 °C	2,137 mm	54	4
1973	35.7 °C8 April 1973	1.1 °C31 December 1973	21.1 °C	2,362 mm	86	0
1972	34.8 °C10 July 1972	4.6 °C8 February 1972	20.7 °C	2,261 mm	85	0
1971	34.2 °C18 June 1971	1.6 °C10 January 1971	20.0 °C	2,494 mm	49	0
1970	35.2 °C12 May 1970	6.6 °C31 January 1970	20.5 °C	2,203 mm	63	0
1969	36.3 °C15 May 1969	5.4 °C6 February 1969	20.7 °C	1,888 mm	80	0
1968	34.2 °C27 July 1968	3.1 °C14 February 1968	20.6 °C	2,191 mm	63	0
1967	34.7 °C30 August 1967	4.0 °C4 January 1967	20.3 °C	2,053 mm	82	0
1966	34.2 °C12 May 1966	5.6 °C30 December 1966	20.0 °C	2,143 mm	32	0
1965	33.9 °C15 July 1965	3.9 °C17 January 1965	19.9 °C	2,147 mm	36	0
1964	33.9 °C19 May 1964	3.5 °C21 December 1964	20.4 °C	2,023 mm	54	0
1963	35.4 °C31 May 1963	4.8 °C27 January 1963	20.6 °C	2,118 mm	79	0
1962	34.8 °C8 May 1962	5.2 °C27 January 1962	20.4 °C	2,180 mm	74	0
1961	34.4 °C11 May 1961	4.3 °C18 January 1961	20.8 °C	2,379 mm	72	0
1960	36.9 °C27 April 1960	5.5 °C26 January 1960	20.8 °C	2,025 mm	74	0
1959	34.5 °C11 April 1959	4.5 °C11 January 1959	20.4 °C	1,948 mm	53	0
1958	36.5 °C22 May 1958	4.5 °C1 February 1958	20.6 °C	2,034 mm	70	0
1957	35.9 °C14 May 1957	3.4 °C12 February 1957	20.6 °C	2,057 mm	77	0
1956	34.4 °C19 April 1956	2.7 °C10 January 1956	19.9 °C	1,897 mm	42	0
1955	34.0 °C16 April 1955	2.9 °C12 January 1955	19.6 °C	2,065 mm	26	0
1954	35.1 °C17 April 1954	2.9 °C17 December 1954	20.3 °C	1,718 mm	49	0
1953	33.7 °C13 August 1953	6.1 °C13 December 1953	20.6 °C	1,889 mm	58	0
1952	33.7 °C3 May 1952	5.1 °C19 February 1952	20.7 °C	1,859 mm	51	0
1951	33.8 °C10 April 1951	5.6 °C14 January 1951	20.2 °C	2,116 mm	24	0
1950	33.7 °C21 April 1950	5.1 °C19 February 1950	20.1 °C	1,875 mm	29	0
1949	33.9 °C7 June 1949	4.6 °C10 January 1949	20.4 °C	1,755 mm	56	0
1948	33.9 °C14 March 1948	4.3 °C4 January 1948	19.8 °C	1,856 mm	32	0
1947	32.8 °C17 July 1947	3.5 °C20 December 1947	19.7 °C	1,729 mm	31	0
1946	33.4 °C19 August 1946	2.8 °C8 January 1946	20.1 °C	1,479 mm	66	0
1945	31.1 °C21 June 1945	3.9 °C9 February 1945	18.8 °C	2,059 mm	10	0
1944	32.1 °C8 April 1944	2.1 °C21 December 1944	19.5 °C	2,206 mm	22	0
1943	31.9 °C27 April 1943	3.9 °C10 December 1943	19.2 °C	2,094 mm	26	0
1942	33.1 °C14 April 1942	5.1 °C14 February 1942	19.6 °C	2,647 mm	19	0
1941	33.2 °C26 April 1941	4.6 °C4 February 1941	19.9 °C	2,107 mm	24	0
1940	32.1 °C15 May 1940	3.0 °C1 January 1940	19.5 °C	1,752 mm	21	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

25.2 °C

+0.4 °C

Hot days (≥ 30 °C)

82 d/yr

+14

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2369 mm

+375 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	17.5 °C	-0.1 °C	48 mm	-46 mm
Feb	18.3 °C	-1.2 °C	126 mm	+24 mm
Mar	23.4 °C	0.0 °C	104 mm	-33 mm
Apr	26.8 °C	-0.2 °C	128 mm	-15 mm
May	28.7 °C	-0.2 °C	250 mm	+42 mm
Jun	29.1 °C	-0.2 °C	406 mm	+143 mm
Jul	30.7 °C	+1.4 °C	338 mm	+85 mm
Aug	29.6 °C	+0.6 °C	234 mm	-50 mm
Sep	29.0 °C	+1.2 °C	321 mm	+132 mm
Oct	26.4 °C	+1.3 °C	191 mm	+54 mm
Nov	21.7 °C	-0.2 °C	164 mm	+63 mm
Dec	20.4 °C	+1.9 °C	61 mm	-24 mm

The year's extremes

Hottest day

35.2 °C

1 Jun 2025

Coldest day

5.4 °C

28 Nov 2025

Wettest day

96.2 mm

21 Jun 2025

Windiest day

10.6 km/h

15 Mar 2025

Strongest gust

68.0 km/h

29 Sep 2025

Hottest feels-like

41.7 °C

14 Jun 2025

Coldest feels-like

3.2 °C

28 Nov 2025

Sunniest day

12.8 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 Lao Cai?

Lao Cai has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,994 mm of precipitation per year.

What is the hottest day ever recorded in Lao Cai?

The hottest day measured in Lao Cai between 1940 and 2025 was 22 May 2023, reaching 38.2 °C.

What is the coldest day in Lao Cai?

The coldest day measured in Lao Cai between 1940 and 2025 was 2 January 1974, at -0.4 °C.

Does it snow in Lao Cai?

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

Has the climate of Lao Cai warmed?

Yes: Lao Cai warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Lao Cai?

The wettest day measured in Lao Cai between 1940 and 2025 was 13 August 1989, with 185 mm of rain in 24 hours.

What was the windiest day in Lao Cai?

The windiest day measured in Lao Cai between 1940 and 2025 was 3 July 1964, with winds reaching 15.5 km/h.

What is the warmest month in Lao Cai?

The warmest month in Lao Cai is June (25.7 °C on average); the coldest is January (13.4 °C).

How much does it rain in Lao Cai?

Lao Cai receives on average 1,994 mm of precipitation per year, spread over about 237 rainy days.

Is it sunny in Lao Cai?

Lao Cai 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 Lao Cai?

The heaviest 24-hour snowfall measured in Lao Cai between 1940 and 2025 was 24 January 2016, with 1.7 cm.

Are there tropical nights in Lao Cai?

Yes: Lao Cai has on average 158 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Lao Cai?

In Lao Cai, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 1 June 2023, and the lowest was -3.4 °C on 2 January 1974.

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