Si Satchanalai climate — normals and trends

Q: What is the climate of Si Satchanalai?

Si Satchanalai has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.2 °C and it receives 1,422 mm of precipitation per year.

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

The hottest day measured in Si Satchanalai between 1940 and 2025 was 16 May 1963, reaching 43.8 °C.

Q: What is the coldest day in Si Satchanalai?

The coldest day measured in Si Satchanalai between 1940 and 2025 was 31 December 1975, at 7.0 °C.

Q: Does it snow in Si Satchanalai?

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

Q: Has the climate of Si Satchanalai warmed?

Yes: Si Satchanalai warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Si Satchanalai?

The wettest day measured in Si Satchanalai between 1940 and 2025 was 19 October 2010, with 172 mm of rain in 24 hours.

Q: What was the windiest day in Si Satchanalai?

The windiest day measured in Si Satchanalai between 1940 and 2025 was 31 March 1976, with winds reaching 25.0 km/h.

Q: What is the warmest month in Si Satchanalai?

The warmest month in Si Satchanalai is April (30.8 °C on average); the coldest is December (23.4 °C).

Q: How much does it rain in Si Satchanalai?

Si Satchanalai receives on average 1,422 mm of precipitation per year, spread over about 154 rainy days.

Q: Is it sunny in Si Satchanalai?

Si Satchanalai gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.

Si Satchanalai (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.2 °C and it receives 1,422 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 (30.8 °C on average) and the coldest is December (23.4 °C). Rainfall peaks in September.

Si Satchanalai averages 0 frost days, 302 hot days (≥ 30 °C) and 154 rainy days per year.

Si Satchanalai has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.

The hottest day of the period reached 43.8 °C (on 16 May 1963) and the coldest 7.0 °C (on 31 December 1975).

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 SatchanalaiSukhothai

coords: 17.52°, 99.76°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthDecember

Mean daily temperature

27.2°C

Average daily high

32.8°C

Average daily low

22.9°C

Annual rainfall

1,422mm

Sunshine / day

9.7h

Mean relative humidity

73%

Average peak wind

9.0km/h

Seasonal range

7.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

302 d/yr

Rainy days (≥ 1 mm)

154 d/yr

Annual snowfall

0.0 cm

Average feels-like high

37.4 °C

Average feels-like low

26.6 °C

Average peak gust

26.1 km/h

Tropical nights (≥ 20 °C)

292 d/yr

Solar radiation

17.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.2 °C

since 1940

+0.3 °C per decade · r² = 0.74 · 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

43.8 °C

16 May 1963

Coldest day

7.0 °C

31 December 1975

Wettest day

172 mm

19 October 2010

Windiest day

25.0 km/h

31 March 1976

Strongest gust

70.2 km/h

22 October 1952

Hottest feels-like

48.5 °C

7 May 2023

Coldest feels-like

4.8 °C

25 December 1999

Sunniest day

12.9 h

28 June 2024

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	41.1 °C25 April 2025	11.8 °C14 January 2025	27.6 °C	1,423 mm	316
2024	42.3 °C29 April 2024	15.7 °C6 February 2024	28.6 °C	1,352 mm	331
2023	42.8 °C7 May 2023	13.5 °C31 January 2023	28.7 °C	1,095 mm	341
2022	40.5 °C27 April 2022	14.7 °C31 January 2022	28.0 °C	1,589 mm	332
2021	40.2 °C5 July 2021	13.3 °C2 January 2021	28.0 °C	1,451 mm	331
2020	42.3 °C21 April 2020	11.7 °C27 January 2020	28.8 °C	1,107 mm	340
2019	42.8 °C20 April 2019	11.9 °C8 December 2019	28.7 °C	1,363 mm	344
2018	39.8 °C15 April 2018	15.8 °C16 January 2018	27.9 °C	1,227 mm	328
2017	40.1 °C3 May 2017	11.7 °C21 December 2017	27.8 °C	1,610 mm	321
2016	43.6 °C11 May 2016	10.9 °C9 February 2016	28.4 °C	1,274 mm	338
2015	42.1 °C20 April 2015	13.1 °C15 February 2015	28.5 °C	1,216 mm	331
2014	41.6 °C23 April 2014	10.0 °C23 January 2014	27.8 °C	1,309 mm	328
2013	41.3 °C30 April 2013	12.7 °C22 December 2013	27.7 °C	1,617 mm	319
2012	41.3 °C26 April 2012	12.9 °C17 January 2012	28.1 °C	1,327 mm	346
2011	38.1 °C7 March 2011	14.5 °C9 February 2011	26.9 °C	1,920 mm	302
2010	41.9 °C9 May 2010	15.7 °C30 December 2010	28.5 °C	1,478 mm	328
2009	40.9 °C24 April 2009	10.1 °C14 January 2009	27.5 °C	1,363 mm	331
2008	40.4 °C13 April 2008	12.6 °C3 January 2008	27.5 °C	1,524 mm	314
2007	42.8 °C24 April 2007	12.2 °C2 February 2007	27.7 °C	1,540 mm	330
2006	41.5 °C10 April 2006	11.0 °C23 December 2006	27.7 °C	1,731 mm	331
2005	42.0 °C31 March 2005	13.0 °C3 January 2005	28.0 °C	1,417 mm	318
2004	43.1 °C13 April 2004	13.8 °C21 December 2004	27.7 °C	1,257 mm	341
2003	42.5 °C7 May 2003	13.4 °C22 December 2003	27.7 °C	1,144 mm	335
2002	41.6 °C17 April 2002	14.2 °C9 January 2002	27.7 °C	1,630 mm	319
2001	39.7 °C28 April 2001	13.9 °C28 November 2001	27.1 °C	1,990 mm	309
2000	41.4 °C4 April 2000	13.7 °C3 February 2000	27.0 °C	1,703 mm	319
1999	39.9 °C13 March 1999	7.2 °C26 December 1999	27.2 °C	1,654 mm	311
1998	42.6 °C14 April 1998	13.4 °C15 January 1998	28.6 °C	998 mm	343
1997	41.6 °C15 May 1997	13.5 °C10 February 1997	27.9 °C	1,139 mm	332
1996	40.1 °C9 April 1996	10.3 °C2 January 1996	27.0 °C	1,561 mm	305
1995	42.8 °C23 April 1995	11.7 °C31 December 1995	27.6 °C	1,655 mm	309
1994	40.8 °C24 April 1994	14.1 °C1 January 1994	27.4 °C	1,840 mm	325
1993	42.3 °C5 May 1993	10.0 °C27 December 1993	27.4 °C	1,085 mm	304
1992	43.2 °C21 April 1992	12.7 °C13 February 1992	27.3 °C	1,320 mm	301
1991	42.8 °C17 April 1991	15.7 °C21 January 1991	27.9 °C	1,239 mm	335
1990	42.5 °C23 April 1990	14.4 °C6 December 1990	27.6 °C	1,403 mm	341
1989	42.0 °C16 April 1989	13.1 °C4 December 1989	27.6 °C	1,201 mm	322
1988	42.1 °C3 April 1988	13.4 °C15 December 1988	27.5 °C	1,621 mm	318
1987	42.3 °C14 April 1987	12.5 °C9 December 1987	27.9 °C	1,301 mm	317
1986	40.2 °C25 March 1986	11.2 °C9 January 1986	27.1 °C	1,428 mm	310
1985	42.3 °C6 April 1985	12.2 °C26 December 1985	27.4 °C	1,277 mm	316
1984	41.5 °C5 April 1984	12.6 °C10 January 1984	27.2 °C	1,333 mm	315
1983	43.5 °C16 April 1983	11.7 °C27 January 1983	27.8 °C	1,298 mm	296
1982	40.6 °C2 May 1982	11.3 °C23 December 1982	27.1 °C	1,249 mm	305
1981	41.8 °C6 April 1981	12.1 °C21 January 1981	27.2 °C	1,470 mm	296
1980	43.4 °C30 April 1980	13.1 °C30 January 1980	27.8 °C	1,605 mm	333
1979	42.4 °C6 May 1979	13.7 °C28 December 1979	27.4 °C	1,436 mm	311
1978	41.5 °C7 April 1978	11.9 °C19 December 1978	27.4 °C	1,655 mm	319
1977	40.6 °C17 April 1977	14.4 °C9 January 1977	27.3 °C	1,345 mm	321
1976	41.8 °C31 March 1976	8.2 °C1 January 1976	26.6 °C	1,714 mm	285
1975	43.1 °C29 April 1975	7.0 °C31 December 1975	26.7 °C	1,781 mm	294
1974	40.1 °C21 April 1974	7.3 °C5 January 1974	26.5 °C	1,515 mm	300
1973	41.5 °C25 April 1973	8.2 °C27 December 1973	26.8 °C	1,617 mm	311
1972	41.4 °C5 May 1972	11.2 °C23 January 1972	27.1 °C	1,399 mm	293
1971	41.1 °C26 April 1971	9.6 °C10 January 1971	26.3 °C	1,442 mm	270
1970	40.9 °C10 May 1970	13.3 °C28 January 1970	26.9 °C	1,812 mm	297
1969	43.4 °C5 May 1969	12.7 °C6 December 1969	27.4 °C	1,395 mm	293
1968	40.3 °C3 April 1968	12.7 °C3 February 1968	27.1 °C	1,199 mm	344
1967	39.7 °C11 April 1967	9.8 °C19 January 1967	26.9 °C	1,130 mm	303
1966	40.7 °C26 April 1966	13.4 °C3 January 1966	26.9 °C	1,431 mm	252
1965	42.2 °C29 April 1965	11.4 °C20 January 1965	26.9 °C	1,693 mm	311
1964	41.0 °C6 April 1964	10.9 °C29 January 1964	26.7 °C	1,305 mm	291
1963	43.8 °C16 May 1963	8.1 °C28 January 1963	26.8 °C	1,474 mm	275
1962	41.4 °C13 April 1962	10.6 °C7 December 1962	26.8 °C	1,281 mm	295
1961	40.6 °C25 April 1961	7.7 °C19 January 1961	26.7 °C	1,463 mm	283
1960	43.0 °C28 April 1960	11.8 °C3 January 1960	27.3 °C	1,406 mm	295
1959	42.1 °C11 April 1959	12.6 °C1 January 1959	27.1 °C	1,357 mm	310
1958	41.8 °C25 April 1958	11.5 °C24 December 1958	27.0 °C	1,074 mm	290
1957	40.8 °C13 May 1957	10.4 °C5 February 1957	26.8 °C	1,821 mm	303
1956	39.3 °C11 April 1956	12.2 °C29 November 1956	26.3 °C	1,504 mm	289
1955	40.1 °C18 April 1955	7.4 °C12 January 1955	26.1 °C	1,250 mm	295
1954	38.9 °C18 April 1954	11.0 °C17 December 1954	26.4 °C	1,049 mm	307
1953	36.3 °C15 April 1953	13.1 °C13 December 1953	25.2 °C	2,029 mm	197
1952	38.8 °C1 May 1952	12.5 °C11 December 1952	26.2 °C	1,673 mm	260
1951	39.6 °C7 April 1951	14.1 °C4 January 1951	26.4 °C	1,320 mm	250
1950	41.7 °C24 April 1950	12.8 °C18 January 1950	26.4 °C	1,195 mm	256
1949	38.0 °C26 February 1949	10.8 °C3 January 1949	26.3 °C	1,060 mm	287
1948	38.3 °C22 March 1948	10.5 °C3 January 1948	26.1 °C	1,352 mm	274
1947	38.9 °C8 May 1947	11.3 °C31 December 1947	26.6 °C	1,036 mm	278
1946	39.8 °C12 March 1946	11.5 °C10 January 1946	26.3 °C	1,091 mm	277
1945	39.7 °C1 April 1945	12.9 °C24 December 1945	26.2 °C	1,816 mm	245
1944	40.3 °C4 May 1944	11.1 °C22 December 1944	26.4 °C	1,395 mm	227
1943	39.3 °C7 April 1943	11.9 °C6 February 1943	26.1 °C	1,318 mm	261
1942	38.7 °C25 April 1942	13.3 °C8 December 1942	25.7 °C	1,509 mm	182
1941	40.2 °C4 April 1941	14.0 °C29 January 1941	26.1 °C	1,321 mm	193
1940	38.3 °C11 March 1940	10.8 °C1 January 1940	25.7 °C	1,307 mm	181

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

33.0 °C

+0.2 °C

Hot days (≥ 30 °C)

316 d/yr

+14

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1423 mm

+1 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.3 °C	-0.7 °C	0 mm	-12 mm
Feb	33.5 °C	-0.2 °C	11 mm	+1 mm
Mar	36.8 °C	+0.5 °C	2 mm	-27 mm
Apr	37.4 °C	0.0 °C	55 mm	+0 mm
May	34.5 °C	-0.4 °C	242 mm	+41 mm
Jun	33.3 °C	+0.6 °C	208 mm	+2 mm
Jul	31.7 °C	-0.4 °C	273 mm	+73 mm
Aug	33.1 °C	+1.5 °C	173 mm	-76 mm
Sep	32.3 °C	+0.8 °C	263 mm	-13 mm
Oct	32.8 °C	+1.3 °C	63 mm	-77 mm
Nov	29.7 °C	-1.3 °C	112 mm	+79 mm
Dec	30.4 °C	+0.3 °C	19 mm	+9 mm

The year's extremes

Hottest day

41.1 °C

25 Apr 2025

Coldest day

11.8 °C

14 Jan 2025

Wettest day

57.2 mm

23 Jul 2025

Windiest day

16.3 km/h

13 Mar 2025

Strongest gust

49.3 km/h

2 Jun 2025

Hottest feels-like

45.8 °C

23 Apr 2025

Coldest feels-like

11.2 °C

14 Jan 2025

Sunniest day

12.8 h

6 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 Si Satchanalai?

Si Satchanalai has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.2 °C and it receives 1,422 mm of precipitation per year.

What is the hottest day ever recorded in Si Satchanalai?

The hottest day measured in Si Satchanalai between 1940 and 2025 was 16 May 1963, reaching 43.8 °C.

What is the coldest day in Si Satchanalai?

The coldest day measured in Si Satchanalai between 1940 and 2025 was 31 December 1975, at 7.0 °C.

Does it snow in Si Satchanalai?

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

Has the climate of Si Satchanalai warmed?

Yes: Si Satchanalai warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Si Satchanalai?

The wettest day measured in Si Satchanalai between 1940 and 2025 was 19 October 2010, with 172 mm of rain in 24 hours.

What was the windiest day in Si Satchanalai?

The windiest day measured in Si Satchanalai between 1940 and 2025 was 31 March 1976, with winds reaching 25.0 km/h.

What is the warmest month in Si Satchanalai?

The warmest month in Si Satchanalai is April (30.8 °C on average); the coldest is December (23.4 °C).

How much does it rain in Si Satchanalai?

Si Satchanalai receives on average 1,422 mm of precipitation per year, spread over about 154 rainy days.

Is it sunny in Si Satchanalai?

Si Satchanalai gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.

Are there tropical nights in Si Satchanalai?

Yes: Si Satchanalai has on average 292 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Si Satchanalai?

In Si Satchanalai, between 1940 and 2025, the highest apparent temperature reached 48.5 °C on 7 May 2023, and the lowest was 4.8 °C on 25 December 1999.

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