Chachoengsao climate — normals and trends

Q: What is the climate of Chachoengsao?

Chachoengsao has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.8 °C and it receives 1,566 mm of precipitation per year.

Q: What is the hottest day ever recorded in Chachoengsao?

The hottest day measured in Chachoengsao between 1940 and 2025 was 23 April 1990, reaching 40.4 °C.

Q: What is the coldest day in Chachoengsao?

The coldest day measured in Chachoengsao between 1940 and 2025 was 25 December 1999, at 10.2 °C.

Q: Does it snow in Chachoengsao?

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

Q: Has the climate of Chachoengsao warmed?

Yes: Chachoengsao warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Chachoengsao?

The wettest day measured in Chachoengsao between 1940 and 2025 was 11 September 2008, with 179 mm of rain in 24 hours.

Q: What was the windiest day in Chachoengsao?

The windiest day measured in Chachoengsao between 1940 and 2025 was 6 February 2016, with winds reaching 28.0 km/h.

Q: What is the warmest month in Chachoengsao?

The warmest month in Chachoengsao is April (29.7 °C on average); the coldest is December (25.6 °C).

Q: How much does it rain in Chachoengsao?

Chachoengsao receives on average 1,566 mm of precipitation per year, spread over about 197 rainy days.

Q: Is it sunny in Chachoengsao?

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

Chachoengsao (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.8 °C and it receives 1,566 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 (29.7 °C on average) and the coldest is December (25.6 °C). Rainfall peaks in September.

Chachoengsao averages 0 frost days, 328 hot days (≥ 30 °C) and 197 rainy days per year.

Chachoengsao has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.4 °C (on 23 April 1990) and the coldest 10.2 °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

ChachoengsaoChachoengsao

coords: 13.69°, 101.07°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthDecember

Mean daily temperature

27.8°C

Average daily high

32.5°C

Average daily low

24.2°C

Annual rainfall

1,566mm

Sunshine / day

10.0h

Mean relative humidity

76%

Average peak wind

12.8km/h

Seasonal range

4.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

328 d/yr

Rainy days (≥ 1 mm)

197 d/yr

Annual snowfall

0.0 cm

Average feels-like high

37.5 °C

Average feels-like low

28.4 °C

Average peak gust

30.8 km/h

Tropical nights (≥ 20 °C)

336 d/yr

Solar radiation

18.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.73 · 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

40.4 °C

23 April 1990

Coldest day

10.2 °C

25 December 1999

Wettest day

179 mm

11 September 2008

Windiest day

28.0 km/h

6 February 2016

Strongest gust

73.4 km/h

19 July 1962

Hottest feels-like

47.6 °C

27 April 2024

Coldest feels-like

8.3 °C

12 January 1955

Sunniest day

12.7 h

6 July 2023

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	36.3 °C28 March 2025	14.9 °C29 November 2025	28.2 °C	1,562 mm	344
2024	39.7 °C30 April 2024	17.6 °C23 December 2024	29.3 °C	1,362 mm	358
2023	39.5 °C7 May 2023	17.5 °C30 January 2023	29.2 °C	1,242 mm	348
2022	37.0 °C16 April 2022	18.2 °C19 December 2022	28.3 °C	1,788 mm	342
2021	36.9 °C31 March 2021	14.7 °C13 January 2021	28.3 °C	1,682 mm	342
2020	38.2 °C8 May 2020	17.4 °C22 December 2020	28.9 °C	1,529 mm	344
2019	38.3 °C2 May 2019	16.3 °C10 December 2019	28.9 °C	1,187 mm	344
2018	36.1 °C15 April 2018	16.2 °C14 January 2018	28.3 °C	1,700 mm	344
2017	37.1 °C23 April 2017	14.5 °C20 December 2017	28.4 °C	1,650 mm	342
2016	38.7 °C11 April 2016	14.2 °C8 February 2016	28.9 °C	1,327 mm	351
2015	39.1 °C1 June 2015	16.3 °C16 January 2015	28.8 °C	1,383 mm	343
2014	37.5 °C27 April 2014	13.9 °C25 January 2014	28.5 °C	1,179 mm	345
2013	39.1 °C16 May 2013	14.7 °C28 December 2013	28.3 °C	1,599 mm	333
2012	37.9 °C25 April 2012	19.5 °C9 January 2012	28.8 °C	1,340 mm	360
2011	35.4 °C4 May 2011	16.5 °C13 December 2011	27.8 °C	1,649 mm	329
2010	38.4 °C22 April 2010	18.0 °C19 January 2010	28.8 °C	1,496 mm	344
2009	38.1 °C24 April 2009	12.4 °C12 January 2009	28.1 °C	1,462 mm	346
2008	36.8 °C30 March 2008	17.3 °C10 December 2008	27.8 °C	1,686 mm	327
2007	37.8 °C1 April 2007	16.0 °C4 February 2007	28.3 °C	1,558 mm	338
2006	36.7 °C18 March 2006	14.9 °C24 December 2006	28.5 °C	1,607 mm	346
2005	38.2 °C3 May 2005	15.6 °C3 January 2005	28.6 °C	1,387 mm	337
2004	38.8 °C15 April 2004	17.2 °C15 December 2004	28.2 °C	1,331 mm	350
2003	37.5 °C15 April 2003	16.3 °C13 January 2003	28.3 °C	1,414 mm	347
2002	38.0 °C9 April 2002	17.5 °C4 January 2002	28.6 °C	1,530 mm	348
2001	38.2 °C22 April 2001	15.4 °C24 December 2001	28.2 °C	1,523 mm	328
2000	37.4 °C4 April 2000	15.8 °C5 February 2000	27.9 °C	1,684 mm	348
1999	37.5 °C20 March 1999	10.2 °C25 December 1999	27.6 °C	1,852 mm	319
1998	39.3 °C14 April 1998	18.5 °C17 December 1998	28.9 °C	1,360 mm	348
1997	39.0 °C20 June 1997	16.3 °C12 January 1997	28.6 °C	1,214 mm	351
1996	38.3 °C10 April 1996	13.5 °C2 January 1996	27.9 °C	1,810 mm	340
1995	39.2 °C23 April 1995	12.5 °C7 January 1995	28.1 °C	1,815 mm	338
1994	38.4 °C5 May 1994	16.5 °C29 December 1994	28.1 °C	1,469 mm	343
1993	38.6 °C1 May 1993	12.8 °C31 January 1993	27.8 °C	1,340 mm	333
1992	38.9 °C14 April 1992	15.2 °C2 December 1992	28.1 °C	1,151 mm	329
1991	38.4 °C13 April 1991	17.5 °C20 November 1991	28.2 °C	1,336 mm	348
1990	40.4 °C23 April 1990	13.9 °C6 December 1990	28.3 °C	1,362 mm	343
1989	38.4 °C23 April 1989	16.1 °C4 December 1989	28.1 °C	1,238 mm	343
1988	37.6 °C6 April 1988	15.2 °C14 December 1988	27.9 °C	1,857 mm	330
1987	39.2 °C11 April 1987	13.8 °C9 December 1987	28.1 °C	1,380 mm	334
1986	37.7 °C30 March 1986	13.6 °C8 January 1986	27.6 °C	1,591 mm	332
1985	38.5 °C12 April 1985	15.1 °C17 December 1985	27.6 °C	1,607 mm	329
1984	38.2 °C5 May 1984	12.1 °C10 January 1984	27.6 °C	1,243 mm	331
1983	38.7 °C14 April 1983	12.7 °C25 January 1983	27.8 °C	1,593 mm	310
1982	38.0 °C24 March 1982	11.0 °C21 December 1982	27.5 °C	1,393 mm	317
1981	36.7 °C9 April 1981	13.3 °C14 January 1981	27.4 °C	1,540 mm	316
1980	39.8 °C25 April 1980	16.6 °C25 December 1980	28.1 °C	1,455 mm	344
1979	39.6 °C20 April 1979	15.5 °C27 December 1979	28.2 °C	1,328 mm	349
1978	37.7 °C29 April 1978	15.4 °C16 December 1978	28.0 °C	1,765 mm	345
1977	38.3 °C30 April 1977	16.4 °C6 December 1977	27.9 °C	1,099 mm	341
1976	38.0 °C13 April 1976	11.4 °C1 January 1976	27.2 °C	1,909 mm	322
1975	38.3 °C29 April 1975	11.4 °C30 December 1975	27.2 °C	2,004 mm	316
1974	35.5 °C24 February 1974	12.7 °C2 January 1974	27.0 °C	1,931 mm	322
1973	38.1 °C25 April 1973	11.6 °C27 December 1973	27.8 °C	1,450 mm	332
1972	37.9 °C26 May 1972	13.1 °C16 January 1972	27.6 °C	1,777 mm	326
1971	36.2 °C8 April 1971	13.0 °C17 November 1971	26.7 °C	1,561 mm	304
1970	37.1 °C10 May 1970	15.7 °C21 December 1970	27.4 °C	1,612 mm	325
1969	37.7 °C22 April 1969	14.2 °C5 December 1969	27.7 °C	1,493 mm	318
1968	37.1 °C3 April 1968	13.6 °C6 January 1968	27.4 °C	1,374 mm	336
1967	38.0 °C2 May 1967	12.3 °C17 January 1967	27.3 °C	1,548 mm	319
1966	37.0 °C25 March 1966	15.5 °C2 January 1966	27.2 °C	1,937 mm	303
1965	37.8 °C1 May 1965	14.3 °C22 January 1965	27.4 °C	1,807 mm	336
1964	38.1 °C6 April 1964	14.6 °C19 December 1964	27.3 °C	1,723 mm	319
1963	37.6 °C23 April 1963	10.7 °C16 January 1963	27.3 °C	1,665 mm	312
1962	36.7 °C22 March 1962	13.7 °C6 December 1962	27.2 °C	1,570 mm	318
1961	37.1 °C2 April 1961	13.1 °C19 January 1961	27.5 °C	1,287 mm	325
1960	39.3 °C25 March 1960	12.7 °C4 January 1960	27.9 °C	1,500 mm	327
1959	37.3 °C18 June 1959	16.5 °C3 March 1959	27.6 °C	1,475 mm	334
1958	38.8 °C5 April 1958	16.0 °C7 January 1958	27.7 °C	1,266 mm	305
1957	38.7 °C18 May 1957	15.5 °C1 January 1957	27.6 °C	1,930 mm	328
1956	36.8 °C23 March 1956	13.5 °C17 January 1956	27.0 °C	1,674 mm	309
1955	37.4 °C18 April 1955	10.7 °C12 January 1955	27.0 °C	1,984 mm	312
1954	38.6 °C16 April 1954	13.0 °C17 December 1954	27.5 °C	1,205 mm	333
1953	36.1 °C19 April 1953	13.1 °C13 December 1953	26.4 °C	2,771 mm	279
1952	35.9 °C3 February 1952	13.0 °C12 December 1952	27.1 °C	2,033 mm	318
1951	37.9 °C3 April 1951	15.7 °C2 January 1951	27.5 °C	1,330 mm	320
1950	38.4 °C23 April 1950	15.8 °C20 December 1950	27.1 °C	1,552 mm	308
1949	37.2 °C24 February 1949	14.0 °C17 January 1949	27.2 °C	1,337 mm	313
1948	35.8 °C22 March 1948	13.5 °C3 January 1948	27.1 °C	1,572 mm	308
1947	36.0 °C7 May 1947	15.4 °C30 December 1947	27.3 °C	1,486 mm	331
1946	38.4 °C10 March 1946	14.8 °C9 January 1946	27.1 °C	1,532 mm	324
1945	36.7 °C1 April 1945	15.3 °C31 December 1945	27.0 °C	1,860 mm	314
1944	37.2 °C8 April 1944	13.1 °C21 December 1944	27.2 °C	1,679 mm	295
1943	36.9 °C7 April 1943	15.3 °C14 January 1943	26.5 °C	1,810 mm	279
1942	36.7 °C24 February 1942	14.6 °C16 December 1942	26.5 °C	1,606 mm	275
1941	37.8 °C2 March 1941	18.3 °C25 December 1941	27.2 °C	1,754 mm	267
1940	38.6 °C11 March 1940	12.7 °C4 January 1940	26.7 °C	1,997 mm	275

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

32.7 °C

+0.2 °C

Hot days (≥ 30 °C)

344 d/yr

+16

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1562 mm

-4 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	31.0 °C	-0.9 °C	0 mm	-17 mm
Feb	33.5 °C	+0.4 °C	30 mm	-4 mm
Mar	34.2 °C	-0.2 °C	63 mm	-1 mm
Apr	34.7 °C	-0.2 °C	101 mm	-1 mm
May	33.2 °C	-0.4 °C	330 mm	+134 mm
Jun	33.4 °C	+0.7 °C	126 mm	-58 mm
Jul	32.5 °C	+0.4 °C	185 mm	-16 mm
Aug	33.3 °C	+1.4 °C	145 mm	-71 mm
Sep	32.2 °C	+0.6 °C	331 mm	+29 mm
Oct	32.4 °C	+0.9 °C	145 mm	-49 mm
Nov	30.5 °C	-0.9 °C	97 mm	+49 mm
Dec	31.7 °C	+0.6 °C	11 mm	+2 mm

The year's extremes

Hottest day

36.3 °C

28 Mar 2025

Coldest day

14.9 °C

29 Nov 2025

Wettest day

45.7 mm

7 Sep 2025

Windiest day

24.7 km/h

11 Jan 2025

Strongest gust

70.2 km/h

22 Jul 2025

Hottest feels-like

45.5 °C

25 Apr 2025

Coldest feels-like

14.4 °C

29 Nov 2025

Sunniest day

12.6 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 Chachoengsao?

Chachoengsao has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.8 °C and it receives 1,566 mm of precipitation per year.

What is the hottest day ever recorded in Chachoengsao?

The hottest day measured in Chachoengsao between 1940 and 2025 was 23 April 1990, reaching 40.4 °C.

What is the coldest day in Chachoengsao?

The coldest day measured in Chachoengsao between 1940 and 2025 was 25 December 1999, at 10.2 °C.

Does it snow in Chachoengsao?

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

Has the climate of Chachoengsao warmed?

Yes: Chachoengsao warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Chachoengsao?

The wettest day measured in Chachoengsao between 1940 and 2025 was 11 September 2008, with 179 mm of rain in 24 hours.

What was the windiest day in Chachoengsao?

The windiest day measured in Chachoengsao between 1940 and 2025 was 6 February 2016, with winds reaching 28.0 km/h.

What is the warmest month in Chachoengsao?

The warmest month in Chachoengsao is April (29.7 °C on average); the coldest is December (25.6 °C).

How much does it rain in Chachoengsao?

Chachoengsao receives on average 1,566 mm of precipitation per year, spread over about 197 rainy days.

Is it sunny in Chachoengsao?

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

Are there tropical nights in Chachoengsao?

Yes: Chachoengsao has on average 336 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Chachoengsao?

In Chachoengsao, between 1940 and 2025, the highest apparent temperature reached 47.6 °C on 27 April 2024, and the lowest was 8.3 °C on 12 January 1955.

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