Chai Badan climate — normals and trends

Q: What is the climate of Chai Badan?

Chai Badan has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.6 °C and it receives 1,132 mm of precipitation per year.

Q: What is the hottest day ever recorded in Chai Badan?

The hottest day measured in Chai Badan between 1940 and 2025 was 18 April 1983, reaching 42.0 °C.

Q: What is the coldest day in Chai Badan?

The coldest day measured in Chai Badan between 1940 and 2025 was 12 January 1955, at 9.0 °C.

Q: Does it snow in Chai Badan?

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

Q: Has the climate of Chai Badan warmed?

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

Q: What is the wettest day in Chai Badan?

The wettest day measured in Chai Badan between 1940 and 2025 was 13 October 2021, with 156 mm of rain in 24 hours.

Q: What was the windiest day in Chai Badan?

The windiest day measured in Chai Badan between 1940 and 2025 was 23 November 1975, with winds reaching 34.6 km/h.

Q: What is the warmest month in Chai Badan?

The warmest month in Chai Badan is April (30.3 °C on average); the coldest is December (24.6 °C).

Q: How much does it rain in Chai Badan?

Chai Badan receives on average 1,132 mm of precipitation per year, spread over about 155 rainy days.

Q: Is it sunny in Chai Badan?

Chai Badan gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Chai Badan (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.6 °C and it receives 1,132 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 (30.3 °C on average) and the coldest is December (24.6 °C). Rainfall peaks in September.

Chai Badan averages 0 frost days, 316 hot days (≥ 30 °C) and 155 rainy days per year.

Chai Badan 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 42.0 °C (on 18 April 1983) and the coldest 9.0 °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

Chai BadanLopburi

coords: 15.20°, 101.13°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthDecember

Mean daily temperature

27.6°C

Average daily high

32.9°C

Average daily low

23.5°C

Annual rainfall

1,132mm

Sunshine / day

10.2h

Mean relative humidity

69%

Average peak wind

14.4km/h

Seasonal range

5.7°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

316 d/yr

Rainy days (≥ 1 mm)

155 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.7 °C

Average feels-like low

26.4 °C

Average peak gust

34.2 km/h

Tropical nights (≥ 20 °C)

317 d/yr

Solar radiation

19.1 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.67 · 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

42.0 °C

18 April 1983

Coldest day

9.0 °C

12 January 1955

Wettest day

156 mm

13 October 2021

Windiest day

34.6 km/h

23 November 1975

Strongest gust

76.0 km/h

29 July 1969

Hottest feels-like

47.2 °C

12 May 2016

Coldest feels-like

4.2 °C

12 January 1955

Sunniest day

12.8 h

13 July 1941

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	39.6 °C29 March 2025	13.3 °C29 November 2025	27.8 °C	1,271 mm	329
2024	41.5 °C27 April 2024	17.4 °C23 December 2024	29.0 °C	1,083 mm	349
2023	40.3 °C6 May 2023	15.4 °C23 January 2023	28.6 °C	1,033 mm	337
2022	40.4 °C13 March 2022	15.9 °C19 December 2022	27.8 °C	1,377 mm	320
2021	39.9 °C2 June 2021	13.6 °C14 January 2021	28.1 °C	1,498 mm	329
2020	40.8 °C21 April 2020	16.6 °C22 December 2020	28.7 °C	1,057 mm	327
2019	40.1 °C1 May 2019	15.4 °C7 December 2019	28.8 °C	988 mm	343
2018	38.5 °C24 April 2018	15.1 °C6 February 2018	28.0 °C	1,203 mm	335
2017	39.8 °C22 April 2017	13.8 °C20 December 2017	28.1 °C	1,094 mm	334
2016	40.9 °C11 April 2016	12.5 °C25 January 2016	28.5 °C	1,108 mm	335
2015	40.0 °C1 June 2015	15.6 °C16 January 2015	28.5 °C	908 mm	338
2014	38.9 °C27 April 2014	11.4 °C24 January 2014	28.0 °C	927 mm	338
2013	39.9 °C5 April 2013	14.0 °C28 December 2013	28.1 °C	1,225 mm	316
2012	38.4 °C27 April 2012	17.6 °C31 December 2012	28.5 °C	994 mm	356
2011	37.8 °C16 April 2011	15.2 °C12 December 2011	27.2 °C	1,471 mm	302
2010	39.9 °C14 April 2010	16.5 °C30 December 2010	28.5 °C	1,089 mm	328
2009	38.7 °C8 May 2009	12.8 °C11 January 2009	27.5 °C	1,278 mm	327
2008	39.5 °C12 April 2008	15.1 °C3 January 2008	27.4 °C	1,428 mm	302
2007	39.9 °C1 April 2007	13.8 °C4 February 2007	28.3 °C	1,172 mm	326
2006	38.5 °C12 April 2006	14.7 °C24 December 2006	28.3 °C	1,166 mm	335
2005	39.5 °C1 April 2005	13.6 °C2 January 2005	28.6 °C	930 mm	339
2004	41.1 °C27 March 2004	15.0 °C25 January 2004	28.3 °C	915 mm	348
2003	40.5 °C6 May 2003	15.3 °C14 January 2003	28.1 °C	1,059 mm	337
2002	39.5 °C18 April 2002	16.9 °C4 January 2002	28.3 °C	1,221 mm	340
2001	41.0 °C11 April 2001	15.9 °C23 December 2001	28.2 °C	1,025 mm	337
2000	38.9 °C4 April 2000	13.9 °C4 February 2000	27.7 °C	1,363 mm	323
1999	39.7 °C26 April 1999	10.3 °C25 December 1999	27.6 °C	1,142 mm	318
1998	40.8 °C15 April 1998	16.7 °C13 December 1998	28.9 °C	974 mm	344
1997	40.0 °C4 May 1997	14.7 °C13 January 1997	28.4 °C	935 mm	347
1996	39.5 °C22 March 1996	11.7 °C2 January 1996	27.6 °C	1,210 mm	319
1995	40.2 °C30 April 1995	12.6 °C8 January 1995	28.0 °C	1,049 mm	325
1994	40.2 °C12 April 1994	15.2 °C26 January 1994	28.0 °C	1,056 mm	342
1993	39.9 °C29 March 1993	13.0 °C30 December 1993	27.9 °C	863 mm	335
1992	41.0 °C14 April 1992	15.1 °C2 December 1992	28.0 °C	857 mm	316
1991	40.0 °C18 April 1991	16.6 °C23 December 1991	27.9 °C	1,272 mm	329
1990	40.4 °C17 April 1990	15.4 °C6 December 1990	28.2 °C	1,141 mm	335
1989	39.8 °C23 April 1989	14.1 °C4 December 1989	28.1 °C	893 mm	340
1988	39.9 °C7 April 1988	13.8 °C14 December 1988	27.9 °C	1,104 mm	312
1987	39.9 °C13 April 1987	13.7 °C9 December 1987	28.0 °C	1,068 mm	317
1986	39.2 °C1 April 1986	13.9 °C6 January 1986	27.5 °C	1,048 mm	318
1985	40.2 °C13 April 1985	13.5 °C18 December 1985	27.4 °C	1,190 mm	322
1984	40.7 °C9 April 1984	10.9 °C10 January 1984	27.4 °C	1,021 mm	316
1983	42.0 °C18 April 1983	13.2 °C23 January 1983	28.0 °C	1,019 mm	300
1982	39.2 °C13 March 1982	10.6 °C30 December 1982	27.8 °C	933 mm	327
1981	38.3 °C10 April 1981	13.1 °C19 January 1981	27.5 °C	971 mm	326
1980	41.0 °C24 April 1980	13.8 °C25 December 1980	27.9 °C	1,179 mm	334
1979	39.7 °C8 April 1979	15.0 °C27 December 1979	28.0 °C	1,252 mm	332
1978	40.9 °C23 March 1978	14.3 °C17 December 1978	27.9 °C	1,299 mm	329
1977	41.3 °C18 April 1977	14.8 °C23 February 1977	27.6 °C	1,003 mm	328
1976	40.1 °C17 April 1976	10.2 °C16 January 1976	27.1 °C	1,350 mm	308
1975	41.1 °C29 April 1975	10.8 °C31 December 1975	27.2 °C	1,334 mm	302
1974	38.5 °C8 May 1974	11.4 °C2 January 1974	27.1 °C	1,309 mm	307
1973	40.1 °C17 April 1973	11.4 °C27 December 1973	27.7 °C	1,091 mm	314
1972	41.4 °C11 May 1972	13.2 °C16 January 1972	27.6 °C	1,430 mm	325
1971	38.8 °C30 March 1971	11.9 °C11 January 1971	26.9 °C	993 mm	302
1970	39.6 °C12 May 1970	16.0 °C2 January 1970	27.7 °C	940 mm	324
1969	40.0 °C4 April 1969	13.8 °C6 December 1969	27.7 °C	1,140 mm	295
1968	39.8 °C27 May 1968	10.8 °C6 January 1968	27.7 °C	833 mm	343
1967	39.2 °C31 March 1967	10.8 °C17 January 1967	26.7 °C	1,070 mm	285
1966	38.3 °C10 April 1966	15.7 °C1 January 1966	26.9 °C	1,496 mm	263
1965	40.0 °C1 May 1965	11.9 °C23 January 1965	27.3 °C	1,134 mm	334
1964	40.2 °C7 April 1964	13.2 °C19 December 1964	27.1 °C	1,264 mm	293
1963	41.1 °C23 April 1963	10.4 °C16 January 1963	27.0 °C	1,229 mm	293
1962	40.1 °C23 March 1962	12.7 °C28 January 1962	27.0 °C	1,014 mm	293
1961	39.8 °C12 April 1961	11.1 °C19 January 1961	27.3 °C	1,119 mm	311
1960	40.3 °C28 April 1960	9.8 °C4 January 1960	27.9 °C	915 mm	333
1959	40.6 °C18 June 1959	14.7 °C12 January 1959	27.6 °C	933 mm	321
1958	40.1 °C25 April 1958	15.1 °C5 January 1958	27.3 °C	1,143 mm	282
1957	40.4 °C15 May 1957	14.4 °C6 February 1957	27.3 °C	1,502 mm	317
1956	38.8 °C18 March 1956	11.0 °C17 January 1956	26.8 °C	1,126 mm	285
1955	39.5 °C18 April 1955	9.0 °C12 January 1955	26.8 °C	1,016 mm	311
1954	39.2 °C18 April 1954	12.5 °C17 December 1954	26.9 °C	968 mm	318
1953	36.5 °C15 April 1953	13.1 °C13 December 1953	25.8 °C	2,111 mm	247
1952	40.6 °C24 April 1952	12.7 °C15 December 1952	27.0 °C	1,363 mm	303
1951	39.8 °C9 April 1951	12.6 °C2 January 1951	27.3 °C	887 mm	297
1950	40.0 °C24 April 1950	13.7 °C26 December 1950	26.8 °C	1,103 mm	291
1949	37.8 °C26 February 1949	11.7 °C17 January 1949	26.8 °C	963 mm	303
1948	37.9 °C22 March 1948	12.6 °C2 January 1948	26.8 °C	1,082 mm	289
1947	38.1 °C8 March 1947	13.5 °C30 December 1947	27.3 °C	980 mm	325
1946	39.5 °C12 March 1946	13.3 °C8 January 1946	26.8 °C	984 mm	316
1945	38.4 °C6 March 1945	14.7 °C18 January 1945	26.8 °C	959 mm	312
1944	40.3 °C4 May 1944	12.7 °C21 December 1944	26.8 °C	1,280 mm	292
1943	38.1 °C7 April 1943	13.6 °C13 January 1943	26.2 °C	1,166 mm	266
1942	37.0 °C24 March 1942	12.6 °C17 December 1942	26.1 °C	1,192 mm	245
1941	38.1 °C2 March 1941	17.2 °C25 December 1941	26.7 °C	1,149 mm	235
1940	38.3 °C11 March 1940	13.1 °C5 January 1940	26.2 °C	1,457 mm	223

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

+0.1 °C

Hot days (≥ 30 °C)

329 d/yr

+13

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1271 mm

+139 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.9 °C	-0.8 °C	0 mm	-9 mm
Feb	34.3 °C	+0.4 °C	6 mm	-10 mm
Mar	36.0 °C	+0.2 °C	22 mm	-16 mm
Apr	36.7 °C	+0.4 °C	76 mm	+8 mm
May	33.5 °C	-1.2 °C	212 mm	+90 mm
Jun	34.0 °C	+0.3 °C	111 mm	-12 mm
Jul	32.2 °C	-0.6 °C	204 mm	+61 mm
Aug	33.0 °C	+0.9 °C	135 mm	-44 mm
Sep	31.8 °C	+0.4 °C	305 mm	+44 mm
Oct	32.1 °C	+0.8 °C	113 mm	-26 mm
Nov	29.5 °C	-1.6 °C	76 mm	+45 mm
Dec	31.6 °C	+1.1 °C	11 mm	+7 mm

The year's extremes

Hottest day

39.6 °C

29 Mar 2025

Coldest day

13.3 °C

29 Nov 2025

Wettest day

74.1 mm

8 Sep 2025

Windiest day

30.7 km/h

27 Jan 2025

Strongest gust

68.0 km/h

23 Jul 2025

Hottest feels-like

45.2 °C

25 Apr 2025

Coldest feels-like

11.9 °C

12 Jan 2025

Sunniest day

12.5 h

2 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 Chai Badan?

Chai Badan has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.6 °C and it receives 1,132 mm of precipitation per year.

What is the hottest day ever recorded in Chai Badan?

The hottest day measured in Chai Badan between 1940 and 2025 was 18 April 1983, reaching 42.0 °C.

What is the coldest day in Chai Badan?

The coldest day measured in Chai Badan between 1940 and 2025 was 12 January 1955, at 9.0 °C.

Does it snow in Chai Badan?

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

Has the climate of Chai Badan warmed?

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

What is the wettest day in Chai Badan?

The wettest day measured in Chai Badan between 1940 and 2025 was 13 October 2021, with 156 mm of rain in 24 hours.

What was the windiest day in Chai Badan?

The windiest day measured in Chai Badan between 1940 and 2025 was 23 November 1975, with winds reaching 34.6 km/h.

What is the warmest month in Chai Badan?

The warmest month in Chai Badan is April (30.3 °C on average); the coldest is December (24.6 °C).

How much does it rain in Chai Badan?

Chai Badan receives on average 1,132 mm of precipitation per year, spread over about 155 rainy days.

Is it sunny in Chai Badan?

Chai Badan gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Are there tropical nights in Chai Badan?

Yes: Chai Badan has on average 317 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Chai Badan?

In Chai Badan, between 1940 and 2025, the highest apparent temperature reached 47.2 °C on 12 May 2016, and the lowest was 4.2 °C on 12 January 1955.

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