Si Sa Ket climate — normals and trends

Q: What is the climate of Si Sa Ket?

Si Sa Ket has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 1,198 mm of precipitation per year.

Q: What is the hottest day ever recorded in Si Sa Ket?

The hottest day measured in Si Sa Ket between 1940 and 2025 was 14 April 1998, reaching 42.3 °C.

Q: What is the coldest day in Si Sa Ket?

The coldest day measured in Si Sa Ket between 1940 and 2025 was 12 January 1955, at 7.9 °C.

Q: Does it snow in Si Sa Ket?

Almost never: Si Sa Ket sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Si Sa Ket warmed?

Yes: Si Sa Ket warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Si Sa Ket?

The wettest day measured in Si Sa Ket between 1940 and 2025 was 14 June 2004, with 193 mm of rain in 24 hours.

Q: What was the windiest day in Si Sa Ket?

The windiest day measured in Si Sa Ket between 1940 and 2025 was 9 November 1992, with winds reaching 39.0 km/h.

Q: What is the warmest month in Si Sa Ket?

The warmest month in Si Sa Ket is April (29.9 °C on average); the coldest is December (23.7 °C).

Q: How much does it rain in Si Sa Ket?

Si Sa Ket receives on average 1,198 mm of precipitation per year, spread over about 160 rainy days.

Q: Is it sunny in Si Sa Ket?

Si Sa Ket gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

Si Sa Ket (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 1,198 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 (29.9 °C on average) and the coldest is December (23.7 °C). Rainfall peaks in September.

Si Sa Ket averages 0 frost days, 298 hot days (≥ 30 °C) and 160 rainy days per year.

Si Sa Ket 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 42.3 °C (on 14 April 1998) and the coldest 7.9 °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

Si Sa KetSi Sa Ket

coords: 15.11°, 104.33°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthJanuary

Mean daily temperature

27.1°C

Average daily high

32.3°C

Average daily low

23.1°C

Annual rainfall

1,198mm

Sunshine / day

10.0h

Mean relative humidity

71%

Average peak wind

13.9km/h

Seasonal range

6.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

298 d/yr

Rainy days (≥ 1 mm)

160 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.4 °C

Average feels-like low

26.0 °C

Average peak gust

31.6 km/h

Tropical nights (≥ 20 °C)

300 d/yr

Solar radiation

18.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.5 °C

since 1940

+0.2 °C per decade · r² = 0.58 · 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

42.3 °C

14 April 1998

Coldest day

7.9 °C

12 January 1955

Wettest day

193 mm

14 June 2004

Windiest day

39.0 km/h

9 November 1992

Strongest gust

75.6 km/h

18 November 1979

Hottest feels-like

47.2 °C

8 April 2024

Coldest feels-like

4.5 °C

12 January 1955

Sunniest day

12.5 h

11 July 1951

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	39.1 °C25 April 2025	12.5 °C13 January 2025	27.3 °C	1,396 mm	307
2024	42.2 °C27 April 2024	15.5 °C23 December 2024	28.5 °C	1,050 mm	342
2023	40.2 °C7 May 2023	13.8 °C30 January 2023	27.8 °C	1,396 mm	322
2022	37.7 °C14 March 2022	15.1 °C19 December 2022	27.1 °C	1,796 mm	313
2021	38.6 °C29 March 2021	11.5 °C13 January 2021	27.5 °C	1,279 mm	299
2020	40.4 °C9 May 2020	14.4 °C22 December 2020	28.0 °C	1,317 mm	310
2019	39.5 °C2 May 2019	14.5 °C10 December 2019	28.2 °C	1,173 mm	332
2018	38.7 °C24 April 2018	13.0 °C6 February 2018	27.6 °C	1,080 mm	331
2017	38.3 °C22 April 2017	13.5 °C21 December 2017	27.6 °C	1,262 mm	332
2016	41.7 °C15 April 2016	12.7 °C8 February 2016	28.2 °C	1,207 mm	335
2015	41.2 °C20 April 2015	13.0 °C16 January 2015	28.2 °C	959 mm	328
2014	39.2 °C24 May 2014	11.9 °C24 January 2014	27.6 °C	1,013 mm	328
2013	40.6 °C6 April 2013	13.2 °C21 December 2013	27.5 °C	1,226 mm	315
2012	40.2 °C26 April 2012	16.1 °C20 February 2012	27.8 °C	1,151 mm	346
2011	38.3 °C7 March 2011	14.1 °C12 December 2011	26.7 °C	1,318 mm	285
2010	40.0 °C13 April 2010	15.7 °C18 December 2010	28.0 °C	1,247 mm	322
2009	38.8 °C19 April 2009	11.9 °C11 January 2009	27.3 °C	1,359 mm	313
2008	38.4 °C20 April 2008	14.8 °C2 January 2008	26.9 °C	1,266 mm	290
2007	40.8 °C23 April 2007	14.2 °C29 January 2007	27.6 °C	1,333 mm	300
2006	38.7 °C24 March 2006	14.5 °C10 January 2006	27.8 °C	1,283 mm	328
2005	41.0 °C6 May 2005	12.2 °C2 January 2005	27.9 °C	909 mm	327
2004	40.0 °C17 April 2004	13.7 °C25 January 2004	27.5 °C	1,154 mm	333
2003	40.2 °C13 April 2003	13.3 °C12 January 2003	27.7 °C	996 mm	326
2002	39.1 °C21 April 2002	15.3 °C6 January 2002	27.7 °C	1,380 mm	323
2001	40.6 °C10 April 2001	13.7 °C23 December 2001	27.6 °C	1,139 mm	312
2000	38.7 °C2 April 2000	13.2 °C2 February 2000	27.1 °C	1,412 mm	300
1999	39.2 °C19 March 1999	10.0 °C24 December 1999	27.1 °C	1,140 mm	300
1998	42.3 °C14 April 1998	16.0 °C15 December 1998	28.7 °C	991 mm	325
1997	39.6 °C7 May 1997	13.7 °C13 January 1997	27.6 °C	1,260 mm	326
1996	39.9 °C21 March 1996	12.9 °C1 January 1996	27.1 °C	1,352 mm	295
1995	39.2 °C23 April 1995	12.9 °C8 January 1995	27.4 °C	1,072 mm	308
1994	39.9 °C2 May 1994	13.2 °C24 January 1994	27.3 °C	1,128 mm	323
1993	39.7 °C4 April 1993	12.2 °C30 January 1993	27.0 °C	1,153 mm	294
1992	40.5 °C23 April 1992	12.9 °C17 January 1992	27.3 °C	1,089 mm	283
1991	40.5 °C12 April 1991	16.5 °C30 December 1991	27.5 °C	1,135 mm	303
1990	39.5 °C23 April 1990	15.5 °C5 December 1990	27.4 °C	1,339 mm	312
1989	41.3 °C23 April 1989	14.7 °C5 December 1989	27.2 °C	1,336 mm	301
1988	39.1 °C30 March 1988	14.9 °C20 January 1988	27.3 °C	1,190 mm	293
1987	39.7 °C12 April 1987	14.2 °C7 December 1987	27.6 °C	1,087 mm	301
1986	39.8 °C20 March 1986	13.0 °C3 March 1986	26.9 °C	1,409 mm	276
1985	39.9 °C13 April 1985	14.1 °C17 December 1985	27.0 °C	1,251 mm	308
1984	39.7 °C5 April 1984	11.6 °C10 January 1984	26.9 °C	1,147 mm	285
1983	42.1 °C14 April 1983	10.9 °C24 January 1983	27.6 °C	1,238 mm	297
1982	40.3 °C30 April 1982	10.2 °C29 December 1982	27.1 °C	1,153 mm	307
1981	40.6 °C6 April 1981	13.2 °C13 January 1981	27.0 °C	1,296 mm	289
1980	41.8 °C25 April 1980	14.3 °C24 December 1980	27.4 °C	1,613 mm	308
1979	39.3 °C7 April 1979	15.5 °C29 November 1979	27.5 °C	1,294 mm	323
1978	38.4 °C1 April 1978	13.5 °C23 January 1978	27.0 °C	1,662 mm	280
1977	39.1 °C6 June 1977	13.9 °C23 February 1977	26.9 °C	1,224 mm	294
1976	38.9 °C17 April 1976	10.3 °C16 January 1976	26.5 °C	1,386 mm	273
1975	40.0 °C14 April 1975	9.9 °C30 December 1975	26.6 °C	1,417 mm	283
1974	37.5 °C8 May 1974	11.4 °C2 January 1974	26.7 °C	1,196 mm	289
1973	39.5 °C19 May 1973	12.5 °C27 December 1973	27.4 °C	1,070 mm	297
1972	40.0 °C27 May 1972	13.4 °C10 January 1972	27.0 °C	1,502 mm	300
1971	38.3 °C4 April 1971	12.0 °C5 January 1971	26.3 °C	998 mm	266
1970	38.7 °C14 March 1970	14.0 °C20 January 1970	27.2 °C	873 mm	296
1969	39.0 °C21 April 1969	14.0 °C6 February 1969	27.2 °C	986 mm	275
1968	39.2 °C1 April 1968	13.3 °C2 January 1968	27.1 °C	1,031 mm	325
1967	38.3 °C4 April 1967	10.4 °C17 January 1967	26.3 °C	843 mm	249
1966	38.4 °C29 April 1966	14.4 °C1 January 1966	26.8 °C	1,422 mm	260
1965	38.4 °C3 April 1965	12.7 °C2 January 1965	26.7 °C	1,339 mm	299
1964	39.3 °C7 April 1964	12.9 °C19 December 1964	26.8 °C	1,217 mm	283
1963	40.6 °C21 April 1963	9.4 °C15 January 1963	26.2 °C	1,150 mm	277
1962	38.8 °C21 March 1962	10.4 °C28 January 1962	26.3 °C	1,226 mm	259
1961	38.0 °C23 February 1961	12.0 °C17 January 1961	26.8 °C	1,333 mm	291
1960	40.6 °C28 April 1960	11.3 °C3 January 1960	26.9 °C	1,415 mm	283
1959	39.1 °C13 June 1959	13.0 °C3 March 1959	27.2 °C	1,045 mm	307
1958	40.4 °C24 April 1958	13.7 °C6 January 1958	26.9 °C	1,199 mm	280
1957	39.4 °C15 May 1957	13.0 °C3 January 1957	26.9 °C	1,383 mm	284
1956	38.5 °C24 March 1956	10.5 °C30 December 1956	26.4 °C	1,227 mm	276
1955	40.1 °C18 April 1955	7.9 °C12 January 1955	26.5 °C	1,083 mm	289
1954	38.5 °C16 April 1954	11.9 °C17 December 1954	26.8 °C	774 mm	307
1953	35.8 °C15 April 1953	13.1 °C9 January 1953	26.4 °C	1,227 mm	284
1952	38.7 °C24 April 1952	12.2 °C10 December 1952	26.7 °C	1,383 mm	284
1951	38.9 °C10 April 1951	13.3 °C14 January 1951	26.9 °C	876 mm	291
1950	39.8 °C24 April 1950	13.8 °C20 December 1950	26.8 °C	904 mm	279
1949	37.9 °C15 March 1949	10.5 °C10 January 1949	26.8 °C	1,240 mm	272
1948	38.9 °C13 March 1948	12.8 °C2 January 1948	26.5 °C	1,184 mm	265
1947	38.1 °C6 May 1947	13.1 °C21 December 1947	27.3 °C	860 mm	318
1946	38.2 °C5 April 1946	12.7 °C8 January 1946	27.0 °C	713 mm	314
1945	38.1 °C4 March 1945	13.4 °C18 January 1945	26.2 °C	1,062 mm	292
1944	38.0 °C9 April 1944	12.2 °C21 December 1944	26.7 °C	1,061 mm	279
1943	37.3 °C25 March 1943	12.4 °C13 January 1943	25.7 °C	1,144 mm	238
1942	36.5 °C20 April 1942	13.6 °C17 December 1942	26.1 °C	1,066 mm	245
1941	37.2 °C1 March 1941	16.1 °C5 February 1941	26.4 °C	1,247 mm	236
1940	37.7 °C11 March 1940	12.5 °C5 January 1940	25.7 °C	1,304 mm	220

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

32.6 °C

+0.3 °C

Hot days (≥ 30 °C)

307 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1396 mm

+198 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.3 °C	-0.5 °C	0 mm	-5 mm
Feb	33.7 °C	+0.8 °C	0 mm	-11 mm
Mar	35.1 °C	+0.2 °C	14 mm	-22 mm
Apr	36.8 °C	+1.3 °C	32 mm	-40 mm
May	34.2 °C	-0.1 °C	191 mm	+61 mm
Jun	33.1 °C	-0.2 °C	158 mm	+14 mm
Jul	32.3 °C	-0.1 °C	180 mm	+12 mm
Aug	32.6 °C	+0.8 °C	179 mm	-27 mm
Sep	31.4 °C	+0.4 °C	330 mm	+68 mm
Oct	31.4 °C	+0.7 °C	169 mm	+44 mm
Nov	29.7 °C	-0.7 °C	141 mm	+107 mm
Dec	30.8 °C	+1.1 °C	3 mm	-3 mm

The year's extremes

Hottest day

39.1 °C

25 Apr 2025

Coldest day

12.5 °C

13 Jan 2025

Wettest day

74.1 mm

7 Nov 2025

Windiest day

34.0 km/h

19 Nov 2025

Strongest gust

65.5 km/h

11 Jan 2025

Hottest feels-like

45.3 °C

9 May 2025

Coldest feels-like

10.7 °C

13 Jan 2025

Sunniest day

12.0 h

12 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 Si Sa Ket?

Si Sa Ket has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 1,198 mm of precipitation per year.

What is the hottest day ever recorded in Si Sa Ket?

The hottest day measured in Si Sa Ket between 1940 and 2025 was 14 April 1998, reaching 42.3 °C.

What is the coldest day in Si Sa Ket?

The coldest day measured in Si Sa Ket between 1940 and 2025 was 12 January 1955, at 7.9 °C.

Does it snow in Si Sa Ket?

Almost never: Si Sa Ket sees virtually no snow, with about 0 frost days per year.

Has the climate of Si Sa Ket warmed?

Yes: Si Sa Ket warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Si Sa Ket?

The wettest day measured in Si Sa Ket between 1940 and 2025 was 14 June 2004, with 193 mm of rain in 24 hours.

What was the windiest day in Si Sa Ket?

The windiest day measured in Si Sa Ket between 1940 and 2025 was 9 November 1992, with winds reaching 39.0 km/h.

What is the warmest month in Si Sa Ket?

The warmest month in Si Sa Ket is April (29.9 °C on average); the coldest is December (23.7 °C).

How much does it rain in Si Sa Ket?

Si Sa Ket receives on average 1,198 mm of precipitation per year, spread over about 160 rainy days.

Is it sunny in Si Sa Ket?

Si Sa Ket gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

Are there tropical nights in Si Sa Ket?

Yes: Si Sa Ket has on average 300 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Si Sa Ket?

In Si Sa Ket, between 1940 and 2025, the highest apparent temperature reached 47.2 °C on 8 April 2024, and the lowest was 4.5 °C on 12 January 1955.

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