Thị Trấn Lam Sơn climate — normals and trends

Q: What is the climate of Thị Trấn Lam Sơn?

Thị Trấn Lam Sơn has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.7 °C and it receives 1,697 mm of precipitation per year.

Q: What is the hottest day ever recorded in Thị Trấn Lam Sơn?

The hottest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 8 April 1973, reaching 43.2 °C.

Q: What is the coldest day in Thị Trấn Lam Sơn?

The coldest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 12 January 1955, at 1.4 °C.

Q: Does it snow in Thị Trấn Lam Sơn?

Almost never: Thị Trấn Lam Sơn sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Thị Trấn Lam Sơn warmed?

Yes: Thị Trấn Lam Sơn warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Thị Trấn Lam Sơn?

The wettest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 23 June 1993, with 237 mm of rain in 24 hours.

Q: What was the windiest day in Thị Trấn Lam Sơn?

The windiest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 27 September 2005, with winds reaching 47.4 km/h.

Q: What is the warmest month in Thị Trấn Lam Sơn?

The warmest month in Thị Trấn Lam Sơn is June (28.9 °C on average); the coldest is January (16.8 °C).

Q: How much does it rain in Thị Trấn Lam Sơn?

Thị Trấn Lam Sơn receives on average 1,697 mm of precipitation per year, spread over about 173 rainy days.

Q: Is it sunny in Thị Trấn Lam Sơn?

Thị Trấn Lam Sơn gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.

Thị Trấn Lam Sơn (Vietnam) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 23.7 °C and it receives 1,697 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 (28.9 °C on average) and the coldest is January (16.8 °C). Rainfall peaks in August.

Thị Trấn Lam Sơn averages 0 frost days, 144 hot days (≥ 30 °C) and 173 rainy days per year.

Thị Trấn Lam Sơn 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 43.2 °C (on 8 April 1973) and the coldest 1.4 °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

Thị Trấn Lam SơnThanh Hóa Province

coords: 19.90°, 105.41°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJuneColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

23.7°C

Average daily high

27.6°C

Average daily low

20.7°C

Annual rainfall

1,697mm

Sunshine / day

7.3h

Mean relative humidity

83%

Average peak wind

10.8km/h

Seasonal range

12.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

144 d/yr

Rainy days (≥ 1 mm)

173 d/yr

Annual snowfall

0.0 cm

Average feels-like high

31.6 °C

Average feels-like low

23.7 °C

Average peak gust

26.2 km/h

Tropical nights (≥ 20 °C)

222 d/yr

Solar radiation

14.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.1 °C

since 1940

+0.1 °C per decade · r² = 0.31 · 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

43.2 °C

8 April 1973

Coldest day

1.4 °C

12 January 1955

Wettest day

237 mm

23 June 1993

Windiest day

47.4 km/h

27 September 2005

Strongest gust

109.8 km/h

27 September 2005

Hottest feels-like

48.3 °C

11 April 2017

Coldest feels-like

-1.5 °C

12 January 1955

Sunniest day

13.0 h

24 June 1956

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.9 °C1 June 2025	7.2 °C13 January 2025	24.1 °C	2,489 mm	151
2024	39.5 °C27 April 2024	9.0 °C24 January 2024	24.9 °C	2,123 mm	177
2023	39.3 °C17 May 2023	7.1 °C30 January 2023	24.9 °C	1,437 mm	166
2022	37.4 °C21 June 2022	8.7 °C20 February 2022	24.1 °C	1,910 mm	145
2021	40.7 °C3 June 2021	7.1 °C2 January 2021	24.6 °C	1,484 mm	165
2020	39.6 °C21 May 2020	9.9 °C31 December 2020	24.7 °C	1,899 mm	148
2019	39.5 °C19 May 2019	8.5 °C10 December 2019	25.2 °C	1,697 mm	173
2018	38.5 °C5 July 2018	9.6 °C30 January 2018	24.4 °C	2,341 mm	145
2017	40.4 °C4 June 2017	10.0 °C19 December 2017	24.4 °C	1,673 mm	149
2016	38.5 °C13 June 2016	6.1 °C24 January 2016	24.5 °C	1,721 mm	182
2015	40.7 °C29 May 2015	8.2 °C14 January 2015	25.0 °C	1,581 mm	178
2014	39.0 °C22 May 2014	6.0 °C23 January 2014	24.0 °C	1,714 mm	156
2013	38.4 °C15 May 2013	5.9 °C20 December 2013	23.8 °C	2,072 mm	147
2012	38.9 °C3 May 2012	9.1 °C26 January 2012	24.0 °C	1,636 mm	151
2011	38.2 °C7 July 2011	7.5 °C26 December 2011	22.8 °C	1,694 mm	119
2010	40.9 °C7 July 2010	9.3 °C27 December 2010	24.5 °C	1,932 mm	166
2009	38.8 °C19 April 2009	6.0 °C11 January 2009	24.2 °C	1,562 mm	159
2008	37.1 °C8 April 2008	6.5 °C3 January 2008	23.2 °C	1,769 mm	145
2007	38.8 °C9 June 2007	7.1 °C29 January 2007	24.0 °C	1,474 mm	138
2006	37.9 °C7 June 2006	9.0 °C23 December 2006	24.1 °C	1,336 mm	159
2005	38.6 °C27 May 2005	7.2 °C2 January 2005	23.7 °C	1,665 mm	156
2004	38.0 °C3 July 2004	7.4 °C9 February 2004	23.5 °C	1,365 mm	139
2003	39.3 °C7 May 2003	7.7 °C7 January 2003	24.4 °C	1,356 mm	173
2002	37.8 °C21 May 2002	8.5 °C6 January 2002	23.9 °C	1,522 mm	157
2001	37.0 °C20 April 2001	6.9 °C24 December 2001	23.6 °C	1,815 mm	135
2000	36.7 °C26 May 2000	8.0 °C2 February 2000	23.6 °C	1,695 mm	135
1999	36.4 °C21 July 1999	3.8 °C24 December 1999	23.7 °C	1,562 mm	145
1998	38.0 °C16 June 1998	10.6 °C5 February 1998	24.6 °C	1,120 mm	164
1997	38.8 °C8 June 1997	8.6 °C12 January 1997	23.9 °C	1,631 mm	140
1996	37.2 °C10 July 1996	6.4 °C21 February 1996	23.2 °C	2,018 mm	134
1995	37.6 °C23 June 1995	6.7 °C31 December 1995	23.3 °C	1,545 mm	137
1994	39.6 °C3 May 1994	10.2 °C21 January 1994	23.8 °C	2,042 mm	136
1993	37.5 °C4 June 1993	5.3 °C31 January 1993	23.6 °C	2,025 mm	149
1992	39.6 °C8 May 1992	7.3 °C15 January 1992	23.4 °C	1,449 mm	144
1991	37.4 °C7 May 1991	7.7 °C29 December 1991	24.1 °C	1,249 mm	159
1990	38.3 °C22 April 1990	9.1 °C6 December 1990	23.9 °C	1,788 mm	152
1989	36.8 °C18 June 1989	8.2 °C12 February 1989	23.4 °C	2,037 mm	140
1988	39.5 °C24 May 1988	8.8 °C12 December 1988	23.7 °C	1,568 mm	142
1987	38.8 °C21 May 1987	6.2 °C8 December 1987	24.4 °C	1,658 mm	166
1986	38.2 °C2 July 1986	5.8 °C7 January 1986	23.4 °C	1,850 mm	143
1985	37.3 °C27 May 1985	7.6 °C24 December 1985	23.1 °C	1,927 mm	134
1984	38.6 °C4 April 1984	6.5 °C9 January 1984	23.2 °C	1,525 mm	133
1983	39.2 °C24 May 1983	5.2 °C23 January 1983	23.4 °C	1,809 mm	161
1982	39.5 °C12 May 1982	4.0 °C28 December 1982	23.6 °C	1,922 mm	141
1981	36.8 °C25 August 1981	6.4 °C21 December 1981	23.8 °C	2,071 mm	153
1980	37.6 °C24 April 1980	7.6 °C9 February 1980	23.7 °C	1,892 mm	139
1979	37.4 °C30 July 1979	9.4 °C2 February 1979	23.8 °C	1,549 mm	147
1978	37.8 °C25 June 1978	7.9 °C22 January 1978	23.3 °C	2,219 mm	122
1977	38.3 °C9 June 1977	7.2 °C31 January 1977	23.2 °C	1,508 mm	146
1976	37.0 °C11 July 1976	6.5 °C13 January 1976	22.9 °C	1,627 mm	134
1975	37.6 °C30 July 1975	3.2 °C31 December 1975	23.2 °C	1,864 mm	136
1974	40.0 °C16 July 1974	2.1 °C2 January 1974	23.5 °C	1,813 mm	147
1973	43.2 °C8 April 1973	5.2 °C27 December 1973	24.3 °C	2,221 mm	156
1972	41.5 °C23 June 1972	7.4 °C16 January 1972	23.8 °C	1,919 mm	154
1971	40.0 °C18 June 1971	5.3 °C10 January 1971	23.0 °C	2,037 mm	133
1970	38.4 °C9 May 1970	7.5 °C31 January 1970	23.4 °C	1,731 mm	135
1969	40.6 °C23 May 1969	7.0 °C11 December 1969	23.9 °C	1,292 mm	171
1968	41.9 °C19 July 1968	6.6 °C5 January 1968	23.8 °C	1,333 mm	141
1967	40.4 °C13 July 1967	3.5 °C18 January 1967	23.2 °C	1,341 mm	133
1966	39.6 °C12 May 1966	7.3 °C1 January 1966	23.7 °C	1,761 mm	126
1965	38.3 °C2 April 1965	7.4 °C19 January 1965	23.4 °C	1,553 mm	128
1964	38.6 °C31 July 1964	5.5 °C19 December 1964	23.1 °C	2,046 mm	136
1963	36.2 °C18 July 1963	3.7 °C16 January 1963	23.0 °C	2,117 mm	137
1962	37.8 °C8 May 1962	5.2 °C28 January 1962	23.0 °C	1,622 mm	141
1961	37.5 °C13 July 1961	3.8 °C18 January 1961	23.6 °C	1,794 mm	132
1960	37.9 °C27 April 1960	5.1 °C2 January 1960	23.7 °C	1,542 mm	146
1959	38.2 °C10 June 1959	6.8 °C14 January 1959	23.5 °C	1,428 mm	136
1958	39.8 °C23 April 1958	6.9 °C1 February 1958	23.4 °C	1,427 mm	158
1957	41.7 °C14 May 1957	6.0 °C14 February 1957	23.5 °C	1,646 mm	137
1956	38.6 °C19 April 1956	6.4 °C10 January 1956	23.1 °C	1,763 mm	138
1955	39.5 °C16 April 1955	1.4 °C12 January 1955	23.1 °C	1,605 mm	131
1954	41.0 °C18 June 1954	5.6 °C17 December 1954	24.1 °C	1,295 mm	151
1953	39.6 °C14 July 1953	7.1 °C13 December 1953	23.9 °C	2,158 mm	144
1952	38.3 °C11 July 1952	7.0 °C19 February 1952	24.1 °C	2,063 mm	151
1951	39.1 °C10 April 1951	8.1 °C13 January 1951	23.6 °C	1,688 mm	151
1950	40.2 °C21 April 1950	9.2 °C7 January 1950	23.9 °C	1,599 mm	148
1949	41.5 °C6 June 1949	5.5 °C16 January 1949	24.1 °C	1,387 mm	146
1948	38.6 °C16 July 1948	6.4 °C7 January 1948	23.6 °C	1,341 mm	131
1947	37.8 °C6 May 1947	7.0 °C30 December 1947	23.2 °C	1,280 mm	121
1946	41.1 °C23 June 1946	6.0 °C8 January 1946	24.6 °C	972 mm	173
1945	35.5 °C13 July 1945	5.0 °C18 January 1945	22.2 °C	1,452 mm	98
1944	38.2 °C8 April 1944	3.8 °C21 December 1944	23.0 °C	1,626 mm	121
1943	38.2 °C27 April 1943	5.7 °C13 January 1943	22.9 °C	1,435 mm	118
1942	37.4 °C19 April 1942	7.6 °C16 December 1942	23.1 °C	1,641 mm	104
1941	36.8 °C26 April 1941	9.6 °C18 December 1941	23.5 °C	1,822 mm	131
1940	36.7 °C15 May 1940	7.8 °C1 January 1940	22.9 °C	1,727 mm	104

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

27.8 °C

+0.2 °C

Hot days (≥ 30 °C)

151 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2489 mm

+792 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	22.0 °C	+1.5 °C	15 mm	-23 mm
Feb	20.3 °C	-1.4 °C	62 mm	+24 mm
Mar	24.6 °C	-0.6 °C	45 mm	-11 mm
Apr	29.0 °C	-0.3 °C	180 mm	+93 mm
May	31.3 °C	-0.8 °C	280 mm	+88 mm
Jun	33.3 °C	+0.3 °C	190 mm	-10 mm
Jul	32.6 °C	-0.4 °C	415 mm	+214 mm
Aug	32.3 °C	+0.5 °C	549 mm	+240 mm
Sep	31.5 °C	+1.3 °C	463 mm	+180 mm
Oct	28.7 °C	+0.9 °C	115 mm	-82 mm
Nov	23.8 °C	-1.1 °C	131 mm	+65 mm
Dec	23.3 °C	+1.7 °C	43 mm	+14 mm

The year's extremes

Hottest day

38.9 °C

1 Jun 2025

Coldest day

7.2 °C

13 Jan 2025

Wettest day

194.7 mm

29 Sep 2025

Windiest day

41.6 km/h

29 Sep 2025

Strongest gust

103.7 km/h

29 Sep 2025

Hottest feels-like

46.3 °C

2 Jun 2025

Coldest feels-like

5.2 °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 Thị Trấn Lam Sơn?

Thị Trấn Lam Sơn has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.7 °C and it receives 1,697 mm of precipitation per year.

What is the hottest day ever recorded in Thị Trấn Lam Sơn?

The hottest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 8 April 1973, reaching 43.2 °C.

What is the coldest day in Thị Trấn Lam Sơn?

The coldest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 12 January 1955, at 1.4 °C.

Does it snow in Thị Trấn Lam Sơn?

Almost never: Thị Trấn Lam Sơn sees virtually no snow, with about 0 frost days per year.

Has the climate of Thị Trấn Lam Sơn warmed?

Yes: Thị Trấn Lam Sơn warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Thị Trấn Lam Sơn?

The wettest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 23 June 1993, with 237 mm of rain in 24 hours.

What was the windiest day in Thị Trấn Lam Sơn?

The windiest day measured in Thị Trấn Lam Sơn between 1940 and 2025 was 27 September 2005, with winds reaching 47.4 km/h.

What is the warmest month in Thị Trấn Lam Sơn?

The warmest month in Thị Trấn Lam Sơn is June (28.9 °C on average); the coldest is January (16.8 °C).

How much does it rain in Thị Trấn Lam Sơn?

Thị Trấn Lam Sơn receives on average 1,697 mm of precipitation per year, spread over about 173 rainy days.

Is it sunny in Thị Trấn Lam Sơn?

Thị Trấn Lam Sơn gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.

Are there tropical nights in Thị Trấn Lam Sơn?

Yes: Thị Trấn Lam Sơn has on average 222 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Thị Trấn Lam Sơn?

In Thị Trấn Lam Sơn, between 1940 and 2025, the highest apparent temperature reached 48.3 °C on 11 April 2017, and the lowest was -1.5 °C on 12 January 1955.

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