Sam Roi Yot climate — normals and trends

Q: What is the climate of Sam Roi Yot?

Sam Roi Yot has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.9 °C and it receives 1,504 mm of precipitation per year.

Q: What is the hottest day ever recorded in Sam Roi Yot?

The hottest day measured in Sam Roi Yot between 1940 and 2025 was 3 May 2024, reaching 38.6 °C.

Q: What is the coldest day in Sam Roi Yot?

The coldest day measured in Sam Roi Yot between 1940 and 2025 was 25 December 1999, at 12.6 °C.

Q: Does it snow in Sam Roi Yot?

Almost never: Sam Roi Yot sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Sam Roi Yot warmed?

Yes: Sam Roi Yot warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Sam Roi Yot?

The wettest day measured in Sam Roi Yot between 1940 and 2025 was 4 October 1959, with 131 mm of rain in 24 hours.

Q: What was the windiest day in Sam Roi Yot?

The windiest day measured in Sam Roi Yot between 1940 and 2025 was 4 November 1997, with winds reaching 35.6 km/h.

Q: What is the warmest month in Sam Roi Yot?

The warmest month in Sam Roi Yot is April (27.9 °C on average); the coldest is December (23.9 °C).

Q: How much does it rain in Sam Roi Yot?

Sam Roi Yot receives on average 1,504 mm of precipitation per year, spread over about 207 rainy days.

Q: Is it sunny in Sam Roi Yot?

Sam Roi Yot gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.

Sam Roi Yot (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.9 °C and it receives 1,504 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 (27.9 °C on average) and the coldest is December (23.9 °C). Rainfall peaks in September.

Sam Roi Yot averages 0 frost days, 216 hot days (≥ 30 °C) and 207 rainy days per year.

Sam Roi Yot has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.6 °C (on 3 May 2024) and the coldest 12.6 °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

Sam Roi YotPrachuap Khiri Khan

coords: 12.27°, 99.87°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthDecember

Mean daily temperature

25.9°C

Average daily high

30.5°C

Average daily low

22.6°C

Annual rainfall

1,504mm

Sunshine / day

9.6h

Mean relative humidity

79%

Average peak wind

13.5km/h

Seasonal range

4.0°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

216 d/yr

Rainy days (≥ 1 mm)

207 d/yr

Annual snowfall

0.0 cm

Average feels-like high

35.0 °C

Average feels-like low

25.9 °C

Average peak gust

35.4 km/h

Tropical nights (≥ 20 °C)

325 d/yr

Solar radiation

18.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.5 °C

since 1940

+0.3 °C per decade · r² = 0.85 · 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

38.6 °C

3 May 2024

Coldest day

12.6 °C

25 December 1999

Wettest day

131 mm

4 October 1959

Windiest day

35.6 km/h

4 November 1997

Strongest gust

90.7 km/h

4 November 1997

Hottest feels-like

46.3 °C

30 April 2024

Coldest feels-like

9.0 °C

25 December 1999

Sunniest day

12.7 h

15 June 2024

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	36.0 °C27 March 2025	16.6 °C30 November 2025	26.8 °C	1,594 mm	274
2024	38.6 °C3 May 2024	19.9 °C21 December 2024	27.8 °C	1,188 mm	309
2023	37.4 °C21 May 2023	18.7 °C2 January 2023	27.3 °C	1,293 mm	278
2022	37.3 °C15 April 2022	17.1 °C29 December 2022	26.5 °C	1,938 mm	241
2021	36.4 °C17 May 2021	16.3 °C22 January 2021	26.6 °C	1,649 mm	244
2020	37.0 °C27 May 2020	18.2 °C16 February 2020	27.1 °C	1,486 mm	301
2019	38.1 °C3 May 2019	18.1 °C25 January 2019	27.3 °C	1,249 mm	293
2018	36.3 °C25 April 2018	18.2 °C14 January 2018	26.7 °C	1,692 mm	277
2017	37.1 °C4 May 2017	16.9 °C21 December 2017	26.7 °C	1,747 mm	244
2016	38.2 °C12 May 2016	15.7 °C10 February 2016	27.2 °C	1,651 mm	290
2015	38.4 °C21 April 2015	17.6 °C22 January 2015	27.0 °C	1,289 mm	298
2014	36.6 °C23 April 2014	13.7 °C24 January 2014	26.6 °C	1,393 mm	265
2013	37.6 °C5 April 2013	15.5 °C29 December 2013	26.7 °C	1,537 mm	265
2012	37.2 °C28 April 2012	20.6 °C22 February 2012	27.0 °C	1,378 mm	296
2011	35.8 °C4 May 2011	16.8 °C30 March 2011	26.5 °C	1,350 mm	261
2010	37.0 °C13 April 2010	19.0 °C18 December 2010	27.1 °C	1,416 mm	277
2009	36.1 °C6 May 2009	15.2 °C12 January 2009	26.6 °C	1,342 mm	287
2008	36.4 °C17 April 2008	17.8 °C21 December 2008	26.4 °C	1,267 mm	231
2007	37.1 °C22 April 2007	17.2 °C2 December 2007	26.5 °C	1,698 mm	229
2006	36.3 °C4 May 2006	17.4 °C24 December 2006	26.7 °C	1,580 mm	260
2005	36.8 °C5 May 2005	17.4 °C4 January 2005	26.8 °C	1,354 mm	255
2004	38.3 °C15 April 2004	17.2 °C23 December 2004	26.8 °C	987 mm	284
2003	37.1 °C6 May 2003	17.9 °C18 December 2003	26.5 °C	1,506 mm	249
2002	36.5 °C10 April 2002	18.1 °C1 January 2002	26.6 °C	1,241 mm	265
2001	36.8 °C7 March 2001	17.8 °C3 January 2001	26.2 °C	1,849 mm	212
2000	36.4 °C4 April 2000	15.4 °C5 February 2000	26.3 °C	1,341 mm	257
1999	37.9 °C18 March 1999	12.6 °C25 December 1999	25.9 °C	1,892 mm	219
1998	38.1 °C2 May 1998	17.4 °C17 January 1998	27.0 °C	1,457 mm	264
1997	37.5 °C12 May 1997	15.0 °C4 January 1997	26.5 °C	1,290 mm	270
1996	36.4 °C17 March 1996	14.8 °C1 January 1996	26.1 °C	1,911 mm	235
1995	37.6 °C22 May 1995	15.9 °C8 January 1995	26.5 °C	1,503 mm	246
1994	37.6 °C11 April 1994	17.4 °C29 January 1994	26.7 °C	1,127 mm	285
1993	37.2 °C5 May 1993	16.1 °C31 January 1993	26.4 °C	1,156 mm	257
1992	37.3 °C11 May 1992	15.8 °C19 January 1992	26.3 °C	1,177 mm	232
1991	36.9 °C8 April 1991	18.4 °C2 December 1991	26.5 °C	1,236 mm	243
1990	37.7 °C23 April 1990	18.0 °C31 January 1990	26.7 °C	870 mm	300
1989	36.9 °C26 April 1989	16.6 °C5 December 1989	26.1 °C	1,304 mm	223
1988	36.6 °C23 April 1988	16.6 °C22 January 1988	26.3 °C	1,390 mm	233
1987	37.1 °C11 April 1987	16.3 °C7 February 1987	26.5 °C	1,221 mm	257
1986	36.0 °C21 April 1986	15.5 °C30 January 1986	25.7 °C	1,273 mm	185
1985	36.9 °C12 April 1985	15.4 °C18 December 1985	25.8 °C	1,432 mm	199
1984	35.6 °C16 April 1984	14.8 °C10 January 1984	25.8 °C	1,174 mm	205
1983	36.7 °C17 May 1983	15.6 °C29 November 1983	26.0 °C	1,376 mm	217
1982	36.8 °C12 May 1982	14.5 °C30 December 1982	25.7 °C	1,289 mm	184
1981	36.2 °C7 April 1981	15.2 °C19 January 1981	25.8 °C	1,317 mm	232
1980	38.2 °C4 May 1980	15.4 °C25 January 1980	26.2 °C	1,225 mm	237
1979	37.3 °C18 April 1979	17.4 °C27 December 1979	26.4 °C	1,063 mm	269
1978	36.5 °C7 April 1978	17.5 °C24 January 1978	26.0 °C	1,485 mm	218
1977	36.5 °C28 April 1977	16.9 °C7 March 1977	25.9 °C	930 mm	226
1976	35.8 °C18 April 1976	13.1 °C17 January 1976	25.1 °C	1,680 mm	180
1975	36.3 °C30 April 1975	13.8 °C31 December 1975	25.2 °C	1,774 mm	170
1974	34.7 °C22 April 1974	15.1 °C4 January 1974	25.0 °C	1,957 mm	177
1973	36.7 °C2 April 1973	14.4 °C27 December 1973	25.5 °C	1,679 mm	195
1972	35.3 °C5 May 1972	15.3 °C13 January 1972	25.4 °C	1,745 mm	204
1971	35.4 °C4 April 1971	14.9 °C14 January 1971	24.8 °C	1,724 mm	164
1970	36.7 °C21 April 1970	16.0 °C18 December 1970	25.6 °C	1,598 mm	201
1969	36.4 °C12 May 1969	16.6 °C6 December 1969	25.8 °C	1,384 mm	216
1968	35.3 °C27 May 1968	15.2 °C6 January 1968	25.4 °C	1,342 mm	185
1967	36.7 °C2 May 1967	14.8 °C20 December 1967	25.3 °C	1,307 mm	181
1966	35.5 °C27 April 1966	16.7 °C3 January 1966	25.1 °C	1,620 mm	143
1965	35.9 °C1 May 1965	13.3 °C23 January 1965	25.2 °C	2,012 mm	175
1964	35.0 °C17 April 1964	16.2 °C9 December 1964	25.2 °C	1,559 mm	202
1963	34.6 °C8 May 1963	14.1 °C17 January 1963	25.1 °C	1,604 mm	150
1962	34.9 °C7 April 1962	15.8 °C22 February 1962	25.1 °C	1,681 mm	162
1961	35.3 °C9 April 1961	15.0 °C20 January 1961	25.2 °C	1,490 mm	146
1960	36.4 °C25 April 1960	13.7 °C4 January 1960	25.6 °C	1,395 mm	188
1959	35.6 °C27 April 1959	16.3 °C20 January 1959	25.5 °C	1,494 mm	172
1958	36.6 °C9 May 1958	16.1 °C12 December 1958	25.8 °C	1,181 mm	187
1957	35.7 °C24 April 1957	13.4 °C6 February 1957	25.5 °C	1,601 mm	185
1956	35.2 °C30 March 1956	13.7 °C17 January 1956	25.0 °C	1,640 mm	157
1955	36.1 °C9 May 1955	14.3 °C12 January 1955	25.2 °C	1,599 mm	201
1954	37.3 °C13 April 1954	15.3 °C17 December 1954	25.4 °C	1,296 mm	209
1953	33.5 °C18 April 1953	15.7 °C10 January 1953	24.7 °C	2,628 mm	125
1952	35.3 °C25 April 1952	14.7 °C23 January 1952	25.2 °C	1,802 mm	165
1951	35.7 °C9 April 1951	15.2 °C2 January 1951	25.4 °C	1,373 mm	199
1950	36.3 °C22 April 1950	15.3 °C4 January 1950	25.2 °C	1,483 mm	177
1949	35.8 °C14 March 1949	14.9 °C11 January 1949	25.1 °C	1,595 mm	175
1948	36.5 °C12 March 1948	16.2 °C31 January 1948	24.9 °C	1,605 mm	165
1947	36.0 °C8 May 1947	16.2 °C8 December 1947	25.1 °C	1,527 mm	172
1946	35.4 °C7 March 1946	15.4 °C11 February 1946	24.8 °C	1,511 mm	139
1945	34.3 °C3 April 1945	15.0 °C26 December 1945	24.6 °C	1,897 mm	101
1944	35.8 °C27 March 1944	15.0 °C21 December 1944	25.0 °C	1,859 mm	169
1943	35.6 °C26 March 1943	14.2 °C24 January 1943	24.2 °C	1,693 mm	102
1942	35.0 °C18 April 1942	15.1 °C18 December 1942	24.6 °C	1,550 mm	150
1941	36.6 °C1 March 1941	16.0 °C25 December 1941	24.8 °C	2,347 mm	125
1940	37.2 °C11 March 1940	13.5 °C8 January 1940	24.4 °C	1,980 mm	119

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

31.3 °C

+0.8 °C

Hot days (≥ 30 °C)

274 d/yr

+58

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1594 mm

+90 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.8 °C	+0.4 °C	1 mm	-22 mm
Feb	31.4 °C	+0.3 °C	58 mm	+28 mm
Mar	33.3 °C	+0.7 °C	46 mm	-12 mm
Apr	33.5 °C	+0.1 °C	129 mm	+35 mm
May	32.4 °C	+0.1 °C	293 mm	+106 mm
Jun	31.3 °C	+0.3 °C	159 mm	+2 mm
Jul	31.1 °C	+0.7 °C	178 mm	-10 mm
Aug	31.7 °C	+1.5 °C	182 mm	-14 mm
Sep	31.1 °C	+1.0 °C	271 mm	+37 mm
Oct	30.3 °C	+1.1 °C	151 mm	-73 mm
Nov	29.0 °C	+0.5 °C	121 mm	+30 mm
Dec	30.4 °C	+2.1 °C	5 mm	-16 mm

The year's extremes

Hottest day

36.0 °C

27 Mar 2025

Coldest day

16.6 °C

30 Nov 2025

Wettest day

50.6 mm

20 Jul 2025

Windiest day

25.1 km/h

12 Jan 2025

Strongest gust

58.7 km/h

12 Jan 2025

Hottest feels-like

43.0 °C

25 Apr 2025

Coldest feels-like

15.3 °C

29 Nov 2025

Sunniest day

12.6 h

25 Jul 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 Sam Roi Yot?

Sam Roi Yot has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.9 °C and it receives 1,504 mm of precipitation per year.

What is the hottest day ever recorded in Sam Roi Yot?

The hottest day measured in Sam Roi Yot between 1940 and 2025 was 3 May 2024, reaching 38.6 °C.

What is the coldest day in Sam Roi Yot?

The coldest day measured in Sam Roi Yot between 1940 and 2025 was 25 December 1999, at 12.6 °C.

Does it snow in Sam Roi Yot?

Almost never: Sam Roi Yot sees virtually no snow, with about 0 frost days per year.

Has the climate of Sam Roi Yot warmed?

Yes: Sam Roi Yot warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Sam Roi Yot?

The wettest day measured in Sam Roi Yot between 1940 and 2025 was 4 October 1959, with 131 mm of rain in 24 hours.

What was the windiest day in Sam Roi Yot?

The windiest day measured in Sam Roi Yot between 1940 and 2025 was 4 November 1997, with winds reaching 35.6 km/h.

What is the warmest month in Sam Roi Yot?

The warmest month in Sam Roi Yot is April (27.9 °C on average); the coldest is December (23.9 °C).

How much does it rain in Sam Roi Yot?

Sam Roi Yot receives on average 1,504 mm of precipitation per year, spread over about 207 rainy days.

Is it sunny in Sam Roi Yot?

Sam Roi Yot gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.

Are there tropical nights in Sam Roi Yot?

Yes: Sam Roi Yot has on average 325 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Sam Roi Yot?

In Sam Roi Yot, between 1940 and 2025, the highest apparent temperature reached 46.3 °C on 30 April 2024, and the lowest was 9.0 °C on 25 December 1999.

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