Ban Samae Dam climate — normals and trends

Q: What is the climate of Ban Samae Dam?

Ban Samae Dam has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.9 °C and it receives 1,137 mm of precipitation per year.

Q: What is the hottest day ever recorded in Ban Samae Dam?

The hottest day measured in Ban Samae Dam between 1940 and 2025 was 10 May 2010, reaching 35.2 °C.

Q: What is the coldest day in Ban Samae Dam?

The coldest day measured in Ban Samae Dam between 1940 and 2025 was 25 December 1999, at 14.7 °C.

Q: Does it snow in Ban Samae Dam?

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

Q: Has the climate of Ban Samae Dam warmed?

Yes: Ban Samae Dam warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Ban Samae Dam?

The wettest day measured in Ban Samae Dam between 1940 and 2025 was 6 September 2012, with 166 mm of rain in 24 hours.

Q: What was the windiest day in Ban Samae Dam?

The windiest day measured in Ban Samae Dam between 1940 and 2025 was 9 May 1986, with winds reaching 39.9 km/h.

Q: What is the warmest month in Ban Samae Dam?

The warmest month in Ban Samae Dam is April (29.4 °C on average); the coldest is December (25.9 °C).

Q: How much does it rain in Ban Samae Dam?

Ban Samae Dam receives on average 1,137 mm of precipitation per year, spread over about 167 rainy days.

Q: Is it sunny in Ban Samae Dam?

Ban Samae Dam gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Ban Samae Dam (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.9 °C and it receives 1,137 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 (29.4 °C on average) and the coldest is December (25.9 °C). Rainfall peaks in September.

Ban Samae Dam averages 0 frost days, 207 hot days (≥ 30 °C) and 167 rainy days per year.

Ban Samae Dam has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.

The hottest day of the period reached 35.2 °C (on 10 May 2010) and the coldest 14.7 °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

Ban Samae DamBangkok

coords: 13.59°, 100.39°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthDecember

Mean daily temperature

27.9°C

Average daily high

30.2°C

Average daily low

26.0°C

Annual rainfall

1,137mm

Sunshine / day

10.2h

Mean relative humidity

75%

Average peak wind

18.3km/h

Seasonal range

3.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

207 d/yr

Rainy days (≥ 1 mm)

167 d/yr

Annual snowfall

0.0 cm

Average feels-like high

34.8 °C

Average feels-like low

29.5 °C

Average peak gust

31.1 km/h

Tropical nights (≥ 20 °C)

359 d/yr

Solar radiation

19.1 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.5 °C

since 1940

+0.2 °C per decade · r² = 0.70 · 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

35.2 °C

10 May 2010

Coldest day

14.7 °C

25 December 1999

Wettest day

166 mm

6 September 2012

Windiest day

39.9 km/h

9 May 1986

Strongest gust

73.1 km/h

9 August 2007

Hottest feels-like

42.8 °C

11 April 2024

Coldest feels-like

11.0 °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 °C25 April 2025	18.2 °C13 January 2025	28.2 °C	1,061 mm	251
2024	34.4 °C21 April 2024	20.6 °C23 December 2024	29.1 °C	992 mm	319
2023	35.0 °C18 May 2023	19.4 °C30 January 2023	28.8 °C	886 mm	298
2022	33.7 °C27 April 2022	19.8 °C19 December 2022	28.3 °C	1,382 mm	263
2021	33.9 °C20 June 2021	17.5 °C13 January 2021	28.2 °C	1,176 mm	249
2020	33.9 °C28 May 2020	20.1 °C21 December 2020	28.7 °C	1,007 mm	297
2019	34.9 °C6 May 2019	19.0 °C7 December 2019	28.8 °C	754 mm	295
2018	32.7 °C7 September 2018	19.4 °C13 January 2018	28.3 °C	1,477 mm	261
2017	33.5 °C25 April 2017	17.1 °C20 December 2017	28.3 °C	1,380 mm	267
2016	34.1 °C11 May 2016	16.5 °C26 January 2016	28.7 °C	1,040 mm	294
2015	34.2 °C11 July 2015	19.4 °C16 January 2015	28.6 °C	854 mm	285
2014	34.4 °C3 June 2014	17.0 °C24 January 2014	28.3 °C	902 mm	251
2013	34.5 °C16 May 2013	17.9 °C28 December 2013	28.2 °C	1,081 mm	252
2012	34.6 °C25 April 2012	22.0 °C9 January 2012	28.7 °C	1,104 mm	275
2011	33.2 °C24 August 2011	18.8 °C17 March 2011	27.8 °C	1,163 mm	226
2010	35.2 °C10 May 2010	20.7 °C18 December 2010	28.7 °C	997 mm	266
2009	34.8 °C23 April 2009	17.4 °C11 January 2009	28.2 °C	1,019 mm	260
2008	32.7 °C10 May 2008	19.9 °C2 January 2008	28.0 °C	1,030 mm	233
2007	33.9 °C16 June 2007	19.5 °C4 February 2007	28.4 °C	1,045 mm	254
2006	33.9 °C3 May 2006	19.0 °C24 December 2006	28.6 °C	1,157 mm	281
2005	34.4 °C6 May 2005	19.1 °C19 December 2005	28.4 °C	945 mm	246
2004	34.3 °C18 April 2004	20.3 °C25 January 2004	28.5 °C	886 mm	267
2003	34.6 °C28 May 2003	19.3 °C21 December 2003	28.5 °C	928 mm	282
2002	33.8 °C12 July 2002	20.3 °C3 January 2002	28.5 °C	1,040 mm	277
2001	34.8 °C20 April 2001	19.5 °C24 December 2001	28.3 °C	1,208 mm	260
2000	33.8 °C9 May 2000	19.5 °C2 February 2000	28.1 °C	1,037 mm	238
1999	33.6 °C25 April 1999	14.7 °C25 December 1999	27.7 °C	1,274 mm	197
1998	34.5 °C24 April 1998	19.4 °C17 December 1998	28.9 °C	1,064 mm	303
1997	34.3 °C28 May 1997	19.4 °C13 January 1997	28.5 °C	823 mm	285
1996	33.7 °C10 April 1996	17.7 °C1 January 1996	27.9 °C	1,420 mm	225
1995	34.3 °C23 April 1995	17.9 °C30 December 1995	28.1 °C	1,262 mm	227
1994	34.2 °C5 May 1994	20.8 °C30 December 1994	28.2 °C	980 mm	257
1993	34.3 °C1 May 1993	18.1 °C30 January 1993	28.1 °C	875 mm	233
1992	34.2 °C10 May 1992	18.8 °C2 December 1992	28.0 °C	876 mm	212
1991	33.9 °C19 May 1991	20.6 °C31 December 1991	28.4 °C	869 mm	266
1990	35.0 °C23 April 1990	18.8 °C6 December 1990	28.5 °C	739 mm	279
1989	34.1 °C21 April 1989	19.9 °C4 December 1989	28.1 °C	836 mm	232
1988	33.6 °C23 April 1988	19.4 °C13 December 1988	28.0 °C	1,232 mm	200
1987	34.1 °C11 April 1987	17.7 °C8 December 1987	28.2 °C	1,100 mm	247
1986	33.2 °C21 April 1986	17.7 °C7 January 1986	27.7 °C	1,092 mm	184
1985	34.0 °C12 April 1985	18.6 °C17 December 1985	27.8 °C	1,192 mm	183
1984	33.6 °C5 May 1984	17.0 °C10 January 1984	27.8 °C	823 mm	187
1983	33.8 °C20 May 1983	17.3 °C25 January 1983	27.8 °C	1,187 mm	175
1982	34.1 °C2 May 1982	16.8 °C29 December 1982	27.9 °C	874 mm	204
1981	33.1 °C17 May 1981	18.0 °C14 January 1981	27.7 °C	1,087 mm	204
1980	34.6 °C25 April 1980	20.0 °C25 December 1980	28.2 °C	973 mm	239
1979	35.1 °C20 April 1979	19.6 °C27 December 1979	28.3 °C	803 mm	268
1978	33.8 °C29 April 1978	19.4 °C16 December 1978	27.9 °C	1,213 mm	201
1977	33.6 °C8 June 1977	20.1 °C23 February 1977	27.9 °C	705 mm	212
1976	33.4 °C13 April 1976	15.4 °C1 January 1976	27.2 °C	1,349 mm	142
1975	34.1 °C29 April 1975	15.4 °C31 December 1975	27.3 °C	1,486 mm	163
1974	34.0 °C22 April 1974	16.6 °C2 January 1974	27.3 °C	1,620 mm	154
1973	33.3 °C23 April 1973	16.0 °C27 December 1973	27.8 °C	1,063 mm	239
1972	33.8 °C4 May 1972	17.4 °C16 January 1972	27.7 °C	1,523 mm	189
1971	32.5 °C30 April 1971	17.3 °C5 January 1971	27.0 °C	1,180 mm	124
1970	34.2 °C10 May 1970	20.8 °C21 December 1970	27.7 °C	1,330 mm	173
1969	33.8 °C13 May 1969	18.6 °C5 December 1969	27.9 °C	1,107 mm	206
1968	33.2 °C28 May 1968	18.2 °C6 January 1968	27.7 °C	1,027 mm	198
1967	34.7 °C2 May 1967	16.1 °C17 January 1967	27.5 °C	990 mm	194
1966	33.6 °C26 April 1966	19.5 °C1 January 1966	27.7 °C	1,352 mm	119
1965	33.5 °C2 May 1965	18.5 °C22 January 1965	27.5 °C	1,257 mm	176
1964	32.7 °C6 April 1964	17.5 °C19 December 1964	27.5 °C	1,137 mm	190
1963	33.3 °C3 May 1963	15.6 °C16 January 1963	27.3 °C	1,184 mm	151
1962	32.9 °C11 July 1962	17.4 °C6 December 1962	27.4 °C	1,221 mm	175
1961	33.1 °C22 April 1961	16.3 °C19 January 1961	27.5 °C	1,058 mm	154
1960	33.9 °C25 March 1960	16.7 °C3 January 1960	27.9 °C	1,087 mm	200
1959	33.2 °C27 April 1959	19.6 °C3 March 1959	27.8 °C	1,119 mm	160
1958	33.4 °C5 April 1958	19.8 °C6 January 1958	27.7 °C	963 mm	171
1957	34.0 °C18 May 1957	20.2 °C12 February 1957	27.7 °C	1,556 mm	166
1956	32.1 °C20 April 1956	18.1 °C27 November 1956	27.2 °C	1,173 mm	123
1955	33.0 °C17 April 1955	14.9 °C12 January 1955	27.2 °C	1,495 mm	145
1954	33.6 °C16 April 1954	17.6 °C17 December 1954	27.7 °C	929 mm	183
1953	32.7 °C18 April 1953	17.4 °C12 December 1953	26.9 °C	2,593 mm	113
1952	32.6 °C30 April 1952	17.3 °C12 December 1952	27.4 °C	1,544 mm	154
1951	32.8 °C11 April 1951	19.5 °C2 January 1951	27.7 °C	953 mm	164
1950	33.6 °C23 April 1950	19.5 °C26 December 1950	27.5 °C	1,096 mm	167
1949	33.1 °C8 July 1949	17.9 °C17 January 1949	27.4 °C	918 mm	152
1948	32.1 °C25 March 1948	17.1 °C3 January 1948	27.3 °C	1,119 mm	127
1947	33.4 °C7 May 1947	18.2 °C30 December 1947	27.7 °C	1,076 mm	165
1946	32.6 °C10 March 1946	18.4 °C9 January 1946	27.4 °C	1,269 mm	132
1945	32.0 °C1 April 1945	18.8 °C18 January 1945	27.2 °C	1,346 mm	96
1944	32.8 °C4 May 1944	16.3 °C21 December 1944	27.2 °C	1,433 mm	102
1943	32.3 °C27 April 1943	18.4 °C13 January 1943	26.7 °C	1,382 mm	46
1942	32.5 °C23 March 1942	18.3 °C7 December 1942	27.1 °C	1,128 mm	102
1941	34.7 °C26 April 1941	22.5 °C25 December 1941	27.5 °C	1,479 mm	118
1940	33.2 °C27 April 1940	16.6 °C3 January 1940	27.1 °C	1,431 mm	72

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)

251 d/yr

+44

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1061 mm

-76 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.5 °C	-0.6 °C	1 mm	-15 mm
Feb	29.9 °C	+0.2 °C	32 mm	+4 mm
Mar	31.1 °C	+0.5 °C	27 mm	-14 mm
Apr	31.9 °C	+0.4 °C	51 mm	-20 mm
May	31.1 °C	-0.1 °C	206 mm	+63 mm
Jun	31.6 °C	+0.8 °C	63 mm	-40 mm
Jul	31.1 °C	+0.7 °C	105 mm	-6 mm
Aug	31.4 °C	+1.2 °C	87 mm	-29 mm
Sep	30.3 °C	+0.5 °C	235 mm	+17 mm
Oct	30.5 °C	+0.8 °C	143 mm	-75 mm
Nov	28.8 °C	-0.9 °C	109 mm	+46 mm
Dec	29.8 °C	+0.7 °C	3 mm	-8 mm

The year's extremes

Hottest day

33.5 °C

25 Apr 2025

Coldest day

18.2 °C

13 Jan 2025

Wettest day

52.9 mm

7 Sep 2025

Windiest day

31.9 km/h

27 Jan 2025

Strongest gust

63.4 km/h

23 Jul 2025

Hottest feels-like

41.9 °C

25 Apr 2025

Coldest feels-like

16.5 °C

13 Jan 2025

Sunniest day

12.4 h

1 Aug 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 Ban Samae Dam?

Ban Samae Dam has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.9 °C and it receives 1,137 mm of precipitation per year.

What is the hottest day ever recorded in Ban Samae Dam?

The hottest day measured in Ban Samae Dam between 1940 and 2025 was 10 May 2010, reaching 35.2 °C.

What is the coldest day in Ban Samae Dam?

The coldest day measured in Ban Samae Dam between 1940 and 2025 was 25 December 1999, at 14.7 °C.

Does it snow in Ban Samae Dam?

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

Has the climate of Ban Samae Dam warmed?

Yes: Ban Samae Dam warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Ban Samae Dam?

The wettest day measured in Ban Samae Dam between 1940 and 2025 was 6 September 2012, with 166 mm of rain in 24 hours.

What was the windiest day in Ban Samae Dam?

The windiest day measured in Ban Samae Dam between 1940 and 2025 was 9 May 1986, with winds reaching 39.9 km/h.

What is the warmest month in Ban Samae Dam?

The warmest month in Ban Samae Dam is April (29.4 °C on average); the coldest is December (25.9 °C).

How much does it rain in Ban Samae Dam?

Ban Samae Dam receives on average 1,137 mm of precipitation per year, spread over about 167 rainy days.

Is it sunny in Ban Samae Dam?

Ban Samae Dam gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Are there tropical nights in Ban Samae Dam?

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

What was the most extreme apparent temperature in Ban Samae Dam?

In Ban Samae Dam, between 1940 and 2025, the highest apparent temperature reached 42.8 °C on 11 April 2024, and the lowest was 11.0 °C on 25 December 1999.

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