Samut Sakhon climate — normals and trends

Q: What is the climate of Samut Sakhon?

Samut Sakhon has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.8 °C and it receives 1,238 mm of precipitation per year.

Q: What is the hottest day ever recorded in Samut Sakhon?

The hottest day measured in Samut Sakhon between 1940 and 2025 was 24 April 2009, reaching 35.7 °C.

Q: What is the coldest day in Samut Sakhon?

The coldest day measured in Samut Sakhon between 1940 and 2025 was 25 December 1999, at 15.0 °C.

Q: Does it snow in Samut Sakhon?

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

Q: Has the climate of Samut Sakhon warmed?

Yes: Samut Sakhon warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Samut Sakhon?

The wettest day measured in Samut Sakhon between 1940 and 2025 was 30 September 2018, with 151 mm of rain in 24 hours.

Q: What was the windiest day in Samut Sakhon?

The windiest day measured in Samut Sakhon between 1940 and 2025 was 9 May 1986, with winds reaching 39.2 km/h.

Q: What is the warmest month in Samut Sakhon?

The warmest month in Samut Sakhon is April (29.3 °C on average); the coldest is January (25.9 °C).

Q: How much does it rain in Samut Sakhon?

Samut Sakhon receives on average 1,238 mm of precipitation per year, spread over about 172 rainy days.

Q: Is it sunny in Samut Sakhon?

Samut Sakhon gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Samut Sakhon (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.8 °C and it receives 1,238 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 April (29.3 °C on average) and the coldest is January (25.9 °C). Rainfall peaks in October.

Samut Sakhon averages 0 frost days, 209 hot days (≥ 30 °C) and 172 rainy days per year.

Samut Sakhon has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.

The hottest day of the period reached 35.7 °C (on 24 April 2009) and the coldest 15.0 °C (on 25 December 1999).

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

Samut SakhonSamut Sakhon

coords: 13.55°, 100.27°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthJanuaryWettest monthOctoberDriest monthDecember

Mean daily temperature

27.8°C

Average daily high

30.2°C

Average daily low

25.7°C

Annual rainfall

1,238mm

Sunshine / day

10.2h

Mean relative humidity

75%

Average peak wind

17.5km/h

Seasonal range

3.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

209 d/yr

Rainy days (≥ 1 mm)

172 d/yr

Annual snowfall

0.0 cm

Average feels-like high

35.0 °C

Average feels-like low

29.2 °C

Average peak gust

31.0 km/h

Tropical nights (≥ 20 °C)

359 d/yr

Solar radiation

19.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.5 °C

since 1940

+0.2 °C per decade · r² = 0.72 · 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

35.7 °C

24 April 2009

Coldest day

15.0 °C

25 December 1999

Wettest day

151 mm

30 September 2018

Windiest day

39.2 km/h

9 May 1986

Strongest gust

67.7 km/h

9 August 2007

Hottest feels-like

43.1 °C

6 May 2023

Coldest feels-like

10.9 °C

25 December 1999

Sunniest day

12.8 h

25 June 1942

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.5 °C10 June 2025	18.6 °C29 November 2025	28.1 °C	1,216 mm	239
2024	34.6 °C5 May 2024	21.0 °C23 December 2024	29.1 °C	1,028 mm	324
2023	35.0 °C6 May 2023	19.2 °C30 January 2023	28.6 °C	1,051 mm	290
2022	34.2 °C27 April 2022	19.6 °C19 December 2022	28.1 °C	1,483 mm	263
2021	34.1 °C20 June 2021	17.7 °C13 January 2021	28.1 °C	1,230 mm	240
2020	33.7 °C16 May 2020	20.1 °C21 December 2020	28.6 °C	1,068 mm	294
2019	35.3 °C3 May 2019	18.9 °C7 December 2019	28.6 °C	883 mm	290
2018	33.0 °C26 July 2018	19.5 °C13 January 2018	28.2 °C	1,529 mm	257
2017	33.4 °C26 April 2017	17.2 °C20 December 2017	28.2 °C	1,469 mm	267
2016	34.7 °C13 May 2016	16.4 °C26 January 2016	28.6 °C	1,061 mm	296
2015	34.7 °C11 July 2015	19.3 °C16 January 2015	28.5 °C	884 mm	286
2014	34.4 °C5 July 2014	16.4 °C24 January 2014	28.1 °C	1,046 mm	248
2013	34.7 °C2 May 2013	17.8 °C28 December 2013	28.1 °C	1,193 mm	247
2012	34.6 °C25 April 2012	22.0 °C9 January 2012	28.4 °C	1,243 mm	265
2011	33.1 °C18 April 2011	18.8 °C17 March 2011	27.7 °C	1,238 mm	208
2010	35.6 °C10 May 2010	20.5 °C18 December 2010	28.6 °C	1,074 mm	274
2009	35.7 °C24 April 2009	17.7 °C11 January 2009	28.2 °C	1,030 mm	268
2008	33.6 °C17 April 2008	19.9 °C2 January 2008	27.9 °C	1,110 mm	239
2007	34.1 °C16 June 2007	19.1 °C4 February 2007	28.3 °C	1,124 mm	259
2006	33.5 °C3 May 2006	19.0 °C24 December 2006	28.5 °C	1,236 mm	284
2005	34.4 °C6 May 2005	19.3 °C2 January 2005	28.3 °C	1,066 mm	248
2004	34.3 °C18 April 2004	20.7 °C25 January 2004	28.4 °C	914 mm	285
2003	34.7 °C24 May 2003	19.9 °C13 January 2003	28.4 °C	1,006 mm	267
2002	34.0 °C12 July 2002	20.4 °C3 January 2002	28.3 °C	1,168 mm	264
2001	35.5 °C20 April 2001	19.8 °C24 December 2001	28.2 °C	1,289 mm	262
2000	34.1 °C10 May 2000	19.5 °C2 February 2000	28.1 °C	1,098 mm	253
1999	33.1 °C20 March 1999	15.0 °C25 December 1999	27.6 °C	1,367 mm	210
1998	34.8 °C24 April 1998	19.4 °C17 December 1998	28.7 °C	1,233 mm	301
1997	34.1 °C28 May 1997	19.4 °C13 January 1997	28.4 °C	915 mm	284
1996	34.1 °C10 April 1996	17.6 °C2 January 1996	27.8 °C	1,560 mm	226
1995	34.9 °C15 April 1995	18.1 °C30 December 1995	28.1 °C	1,339 mm	242
1994	33.8 °C5 May 1994	21.4 °C26 January 1994	28.2 °C	992 mm	271
1993	34.3 °C1 May 1993	18.4 °C30 January 1993	27.9 °C	1,018 mm	239
1992	34.6 °C27 April 1992	18.7 °C25 December 1992	27.9 °C	982 mm	210
1991	34.4 °C19 May 1991	20.4 °C31 December 1991	28.3 °C	978 mm	270
1990	34.8 °C23 April 1990	19.2 °C6 December 1990	28.3 °C	841 mm	285
1989	34.4 °C21 April 1989	19.5 °C4 December 1989	28.0 °C	988 mm	224
1988	34.2 °C23 April 1988	19.6 °C13 December 1988	27.9 °C	1,307 mm	206
1987	34.5 °C13 July 1987	17.9 °C8 December 1987	28.2 °C	1,122 mm	246
1986	33.2 °C21 April 1986	17.7 °C7 January 1986	27.6 °C	1,217 mm	186
1985	34.3 °C11 April 1985	18.7 °C17 December 1985	27.7 °C	1,302 mm	182
1984	33.2 °C19 April 1984	17.2 °C10 January 1984	27.7 °C	895 mm	195
1983	33.6 °C21 May 1983	17.7 °C25 January 1983	27.7 °C	1,260 mm	183
1982	34.2 °C2 May 1982	17.4 °C21 December 1982	27.7 °C	939 mm	209
1981	33.2 °C2 May 1981	18.3 °C14 January 1981	27.5 °C	1,254 mm	201
1980	35.2 °C4 May 1980	20.0 °C25 December 1980	28.1 °C	1,022 mm	246
1979	35.3 °C20 April 1979	19.9 °C27 December 1979	28.2 °C	824 mm	274
1978	33.9 °C29 April 1978	19.3 °C16 December 1978	27.7 °C	1,385 mm	173
1977	33.5 °C8 June 1977	20.1 °C23 February 1977	27.7 °C	846 mm	208
1976	33.7 °C13 April 1976	15.5 °C1 January 1976	27.1 °C	1,470 mm	156
1975	34.0 °C30 April 1975	15.5 °C31 December 1975	27.1 °C	1,699 mm	168
1974	34.1 °C22 April 1974	16.9 °C2 January 1974	27.2 °C	1,756 mm	149
1973	34.1 °C23 April 1973	16.3 °C27 December 1973	27.7 °C	1,182 mm	225
1972	34.4 °C4 May 1972	17.7 °C16 January 1972	27.5 °C	1,713 mm	196
1971	33.2 °C30 April 1971	17.5 °C10 January 1971	27.0 °C	1,204 mm	152
1970	34.3 °C10 May 1970	21.0 °C30 October 1970	27.6 °C	1,395 mm	183
1969	34.6 °C13 May 1969	18.7 °C5 December 1969	27.9 °C	1,163 mm	221
1968	33.4 °C28 May 1968	18.3 °C6 January 1968	27.6 °C	1,123 mm	196
1967	35.1 °C2 May 1967	16.4 °C17 January 1967	27.4 °C	1,057 mm	187
1966	33.9 °C26 April 1966	19.1 °C3 December 1966	27.5 °C	1,543 mm	120
1965	33.7 °C24 April 1965	18.2 °C22 January 1965	27.4 °C	1,416 mm	175
1964	32.7 °C6 April 1964	17.5 °C19 December 1964	27.3 °C	1,246 mm	196
1963	33.2 °C17 May 1963	15.9 °C16 January 1963	27.1 °C	1,279 mm	137
1962	33.0 °C29 May 1962	17.7 °C6 December 1962	27.3 °C	1,311 mm	177
1961	33.1 °C22 April 1961	16.4 °C19 January 1961	27.4 °C	1,146 mm	157
1960	34.3 °C25 April 1960	16.6 °C4 January 1960	27.7 °C	1,146 mm	206
1959	33.1 °C27 April 1959	19.8 °C3 March 1959	27.6 °C	1,186 mm	173
1958	34.3 °C27 May 1958	19.8 °C6 January 1958	27.6 °C	1,025 mm	173
1957	33.9 °C18 May 1957	19.3 °C6 February 1957	27.5 °C	1,684 mm	157
1956	32.4 °C29 April 1956	18.4 °C28 November 1956	27.0 °C	1,215 mm	143
1955	33.5 °C9 May 1955	15.3 °C12 January 1955	27.1 °C	1,667 mm	155
1954	33.8 °C16 April 1954	17.8 °C17 December 1954	27.6 °C	1,002 mm	194
1953	32.8 °C17 April 1953	17.5 °C12 December 1953	26.7 °C	2,705 mm	113
1952	32.9 °C30 April 1952	17.3 °C12 December 1952	27.2 °C	1,727 mm	161
1951	33.3 °C10 April 1951	19.2 °C2 January 1951	27.5 °C	1,057 mm	172
1950	33.9 °C23 April 1950	19.4 °C26 December 1950	27.3 °C	1,250 mm	174
1949	32.9 °C13 April 1949	18.1 °C17 January 1949	27.3 °C	981 mm	163
1948	32.5 °C12 March 1948	17.4 °C3 January 1948	27.2 °C	1,197 mm	137
1947	33.5 °C7 May 1947	18.2 °C21 December 1947	27.5 °C	1,141 mm	166
1946	32.7 °C10 March 1946	18.6 °C9 January 1946	27.2 °C	1,390 mm	150
1945	32.4 °C1 April 1945	18.7 °C31 December 1945	27.0 °C	1,500 mm	86
1944	32.7 °C7 April 1944	16.5 °C21 December 1944	27.1 °C	1,551 mm	116
1943	32.1 °C27 April 1943	18.4 °C13 January 1943	26.5 °C	1,522 mm	63
1942	32.7 °C24 March 1942	18.3 °C7 December 1942	26.9 °C	1,260 mm	103
1941	35.0 °C26 April 1941	21.8 °C24 January 1941	27.3 °C	1,651 mm	115
1940	33.3 °C11 March 1940	17.1 °C3 January 1940	26.9 °C	1,548 mm	86

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

30.5 °C

+0.3 °C

Hot days (≥ 30 °C)

239 d/yr

+30

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1216 mm

-22 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.5 °C	-0.5 °C	1 mm	-16 mm
Feb	30.0 °C	+0.2 °C	31 mm	+3 mm
Mar	31.3 °C	+0.6 °C	37 mm	-8 mm
Apr	31.7 °C	+0.1 °C	73 mm	-3 mm
May	31.1 °C	-0.3 °C	223 mm	+71 mm
Jun	32.0 °C	+1.1 °C	71 mm	-46 mm
Jul	31.2 °C	+0.7 °C	117 mm	-7 mm
Aug	31.4 °C	+1.1 °C	117 mm	-12 mm
Sep	30.3 °C	+0.4 °C	239 mm	+14 mm
Oct	30.3 °C	+0.7 °C	175 mm	-62 mm
Nov	28.6 °C	-0.9 °C	128 mm	+53 mm
Dec	29.6 °C	+0.6 °C	5 mm	-8 mm

The year's extremes

Hottest day

33.5 °C

10 Jun 2025

Coldest day

18.6 °C

29 Nov 2025

Wettest day

56.9 mm

7 Sep 2025

Windiest day

28.5 km/h

27 Jan 2025

Strongest gust

62.3 km/h

23 Jul 2025

Hottest feels-like

41.5 °C

25 Apr 2025

Coldest feels-like

16.5 °C

12 Jan 2025

Sunniest day

12.6 h

24 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 Samut Sakhon?

Samut Sakhon has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.8 °C and it receives 1,238 mm of precipitation per year.

What is the hottest day ever recorded in Samut Sakhon?

The hottest day measured in Samut Sakhon between 1940 and 2025 was 24 April 2009, reaching 35.7 °C.

What is the coldest day in Samut Sakhon?

The coldest day measured in Samut Sakhon between 1940 and 2025 was 25 December 1999, at 15.0 °C.

Does it snow in Samut Sakhon?

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

Has the climate of Samut Sakhon warmed?

Yes: Samut Sakhon warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Samut Sakhon?

The wettest day measured in Samut Sakhon between 1940 and 2025 was 30 September 2018, with 151 mm of rain in 24 hours.

What was the windiest day in Samut Sakhon?

The windiest day measured in Samut Sakhon between 1940 and 2025 was 9 May 1986, with winds reaching 39.2 km/h.

What is the warmest month in Samut Sakhon?

The warmest month in Samut Sakhon is April (29.3 °C on average); the coldest is January (25.9 °C).

How much does it rain in Samut Sakhon?

Samut Sakhon receives on average 1,238 mm of precipitation per year, spread over about 172 rainy days.

Is it sunny in Samut Sakhon?

Samut Sakhon gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Are there tropical nights in Samut Sakhon?

Yes: Samut Sakhon has on average 359 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Samut Sakhon?

In Samut Sakhon, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 6 May 2023, and the lowest was 10.9 °C on 25 December 1999.

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