Phra Nakhon Si Ayutthaya climate — normals and trends

Q: What is the climate of Phra Nakhon Si Ayutthaya?

Phra Nakhon Si Ayutthaya has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.2 °C and it receives 1,322 mm of precipitation per year.

Q: What is the hottest day ever recorded in Phra Nakhon Si Ayutthaya?

The hottest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 4 May 1980, reaching 41.8 °C.

Q: What is the coldest day in Phra Nakhon Si Ayutthaya?

The coldest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 12 January 1955, at 11.8 °C.

Q: Does it snow in Phra Nakhon Si Ayutthaya?

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

Q: Has the climate of Phra Nakhon Si Ayutthaya warmed?

Yes: Phra Nakhon Si Ayutthaya warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Phra Nakhon Si Ayutthaya?

The wettest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 12 September 2006, with 122 mm of rain in 24 hours.

Q: What was the windiest day in Phra Nakhon Si Ayutthaya?

The windiest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 3 November 2009, with winds reaching 29.8 km/h.

Q: What is the warmest month in Phra Nakhon Si Ayutthaya?

The warmest month in Phra Nakhon Si Ayutthaya is April (30.4 °C on average); the coldest is December (25.9 °C).

Q: How much does it rain in Phra Nakhon Si Ayutthaya?

Phra Nakhon Si Ayutthaya receives on average 1,322 mm of precipitation per year, spread over about 180 rainy days.

Q: Is it sunny in Phra Nakhon Si Ayutthaya?

Phra Nakhon Si Ayutthaya gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

Phra Nakhon Si Ayutthaya (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 28.2 °C and it receives 1,322 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 (30.4 °C on average) and the coldest is December (25.9 °C). Rainfall peaks in September.

Phra Nakhon Si Ayutthaya averages 0 frost days, 333 hot days (≥ 30 °C) and 180 rainy days per year.

Phra Nakhon Si Ayutthaya has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.

The hottest day of the period reached 41.8 °C (on 4 May 1980) and the coldest 11.8 °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

Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya

coords: 14.35°, 100.58°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthDecember

Mean daily temperature

28.2°C

Average daily high

33.2°C

Average daily low

24.4°C

Annual rainfall

1,322mm

Sunshine / day

10.1h

Mean relative humidity

72%

Average peak wind

12.8km/h

Seasonal range

4.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

333 d/yr

Rainy days (≥ 1 mm)

180 d/yr

Annual snowfall

0.0 cm

Average feels-like high

37.8 °C

Average feels-like low

28.3 °C

Average peak gust

30.2 km/h

Tropical nights (≥ 20 °C)

341 d/yr

Solar radiation

18.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.1 °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

41.8 °C

4 May 1980

Coldest day

11.8 °C

12 January 1955

Wettest day

122 mm

12 September 2006

Windiest day

29.8 km/h

3 November 2009

Strongest gust

71.6 km/h

19 July 1962

Hottest feels-like

47.8 °C

18 April 1953

Coldest feels-like

8.6 °C

12 January 1955

Sunniest day

12.8 h

13 July 1941

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.6 °C26 April 2025	16.9 °C29 November 2025	28.5 °C	1,514 mm	341
2024	40.1 °C27 April 2024	19.3 °C21 December 2024	29.6 °C	1,183 mm	358
2023	40.4 °C7 May 2023	17.7 °C31 January 2023	29.5 °C	990 mm	352
2022	38.0 °C16 April 2022	18.6 °C19 December 2022	28.6 °C	1,462 mm	344
2021	40.1 °C19 May 2021	16.1 °C20 January 2021	28.6 °C	1,537 mm	341
2020	39.5 °C22 April 2020	19.0 °C21 December 2020	29.3 °C	1,147 mm	341
2019	40.1 °C3 May 2019	17.4 °C7 December 2019	29.4 °C	1,135 mm	347
2018	38.8 °C23 April 2018	18.2 °C13 January 2018	28.7 °C	1,360 mm	346
2017	39.3 °C21 April 2017	15.5 °C20 December 2017	28.8 °C	1,562 mm	341
2016	40.2 °C11 May 2016	14.3 °C26 January 2016	29.3 °C	1,056 mm	354
2015	39.7 °C1 June 2015	17.7 °C16 January 2015	29.2 °C	1,070 mm	351
2014	38.6 °C22 April 2014	13.7 °C24 January 2014	28.8 °C	1,099 mm	346
2013	40.6 °C2 May 2013	16.1 °C28 December 2013	28.6 °C	1,323 mm	334
2012	39.5 °C30 April 2012	20.5 °C9 January 2012	29.0 °C	1,241 mm	361
2011	37.4 °C18 April 2011	17.2 °C17 March 2011	28.0 °C	1,552 mm	332
2010	40.6 °C10 May 2010	19.5 °C18 December 2010	29.1 °C	1,400 mm	343
2009	40.5 °C16 April 2009	15.4 °C12 January 2009	28.5 °C	1,289 mm	345
2008	38.2 °C15 April 2008	17.5 °C10 December 2008	28.3 °C	1,323 mm	343
2007	39.9 °C1 April 2007	16.1 °C4 February 2007	28.8 °C	1,299 mm	347
2006	39.0 °C3 May 2006	16.3 °C24 December 2006	29.0 °C	1,286 mm	348
2005	40.4 °C6 May 2005	15.4 °C3 January 2005	29.0 °C	1,230 mm	340
2004	40.8 °C15 April 2004	17.3 °C15 February 2004	29.0 °C	993 mm	357
2003	40.6 °C6 May 2003	16.6 °C14 January 2003	28.9 °C	1,080 mm	353
2002	39.1 °C9 April 2002	18.7 °C1 January 2002	29.0 °C	1,318 mm	352
2001	40.8 °C21 April 2001	17.8 °C31 December 2001	28.8 °C	1,222 mm	349
2000	40.1 °C4 April 2000	15.5 °C4 February 2000	28.5 °C	1,344 mm	350
1999	39.0 °C18 March 1999	12.6 °C25 December 1999	28.2 °C	1,505 mm	336
1998	40.5 °C24 April 1998	18.7 °C17 December 1998	29.5 °C	1,102 mm	351
1997	41.1 °C20 June 1997	15.9 °C13 January 1997	29.1 °C	1,012 mm	358
1996	39.6 °C31 March 1996	14.4 °C2 January 1996	28.2 °C	1,521 mm	345
1995	40.9 °C15 April 1995	14.2 °C8 January 1995	28.5 °C	1,617 mm	344
1994	39.3 °C11 April 1994	17.4 °C25 January 1994	28.5 °C	1,320 mm	352
1993	40.6 °C28 April 1993	15.7 °C31 January 1993	28.6 °C	1,009 mm	346
1992	40.7 °C21 April 1992	16.4 °C18 January 1992	28.4 °C	1,054 mm	337
1991	39.0 °C19 May 1991	18.3 °C6 February 1991	28.7 °C	1,063 mm	354
1990	40.3 °C11 April 1990	16.6 °C6 December 1990	28.8 °C	1,144 mm	349
1989	39.8 °C19 April 1989	17.0 °C4 December 1989	28.5 °C	1,085 mm	352
1988	38.1 °C23 April 1988	16.9 °C20 January 1988	28.3 °C	1,444 mm	337
1987	39.6 °C11 April 1987	15.8 °C9 December 1987	28.5 °C	1,210 mm	338
1986	38.9 °C21 April 1986	15.9 °C6 January 1986	27.9 °C	1,298 mm	334
1985	40.0 °C13 April 1985	15.8 °C24 December 1985	27.9 °C	1,425 mm	337
1984	39.5 °C5 May 1984	13.7 °C10 January 1984	28.0 °C	872 mm	345
1983	40.7 °C22 May 1983	14.9 °C25 January 1983	28.3 °C	1,311 mm	316
1982	38.6 °C2 May 1982	13.3 °C29 December 1982	27.9 °C	1,154 mm	328
1981	38.7 °C24 March 1981	14.6 °C19 January 1981	27.9 °C	1,304 mm	327
1980	41.8 °C4 May 1980	16.3 °C25 December 1980	28.6 °C	1,142 mm	348
1979	40.5 °C20 April 1979	17.1 °C27 December 1979	28.8 °C	1,049 mm	357
1978	39.9 °C29 April 1978	16.4 °C16 December 1978	28.2 °C	1,438 mm	340
1977	38.9 °C29 April 1977	17.6 °C23 February 1977	28.3 °C	1,005 mm	351
1976	39.7 °C17 April 1976	12.6 °C16 January 1976	27.6 °C	1,643 mm	324
1975	39.1 °C30 April 1975	13.2 °C30 December 1975	27.4 °C	1,667 mm	318
1974	37.5 °C8 May 1974	13.9 °C5 January 1974	27.5 °C	1,544 mm	327
1973	40.4 °C23 April 1973	13.6 °C27 December 1973	28.2 °C	1,173 mm	335
1972	41.1 °C8 May 1972	14.4 °C16 January 1972	27.9 °C	1,723 mm	332
1971	38.1 °C8 April 1971	15.1 °C5 January 1971	27.3 °C	1,368 mm	311
1970	39.4 °C12 May 1970	17.3 °C2 January 1970	27.9 °C	1,305 mm	334
1969	39.5 °C3 April 1969	15.8 °C23 December 1969	28.2 °C	1,340 mm	325
1968	39.3 °C28 May 1968	13.9 °C6 January 1968	28.0 °C	1,120 mm	347
1967	39.9 °C2 May 1967	13.9 °C17 January 1967	27.6 °C	1,186 mm	330
1966	38.8 °C27 April 1966	17.2 °C1 January 1966	27.4 °C	1,643 mm	294
1965	39.7 °C1 May 1965	14.2 °C19 January 1965	27.6 °C	1,515 mm	331
1964	38.9 °C6 April 1964	15.0 °C19 December 1964	27.5 °C	1,420 mm	310
1963	39.8 °C16 May 1963	12.7 °C16 January 1963	27.5 °C	1,475 mm	315
1962	38.7 °C6 April 1962	14.8 °C28 January 1962	27.7 °C	1,290 mm	324
1961	38.6 °C8 April 1961	13.6 °C19 January 1961	27.8 °C	1,113 mm	332
1960	41.4 °C25 April 1960	12.0 °C4 January 1960	28.3 °C	1,153 mm	336
1959	38.4 °C15 June 1959	16.9 °C19 January 1959	28.1 °C	1,166 mm	340
1958	39.0 °C26 March 1958	16.4 °C25 November 1958	27.8 °C	1,126 mm	306
1957	40.4 °C15 May 1957	14.8 °C6 February 1957	27.8 °C	1,621 mm	332
1956	37.6 °C22 March 1956	12.7 °C17 January 1956	27.2 °C	1,295 mm	312
1955	39.3 °C18 April 1955	11.8 °C12 January 1955	27.1 °C	1,596 mm	317
1954	39.1 °C17 April 1954	14.1 °C17 December 1954	27.8 °C	1,087 mm	336
1953	36.2 °C17 April 1953	15.2 °C12 December 1953	26.4 °C	2,781 mm	276
1952	38.0 °C30 April 1952	14.7 °C12 December 1952	27.3 °C	1,782 mm	316
1951	40.2 °C10 April 1951	15.3 °C2 January 1951	27.8 °C	1,159 mm	320
1950	39.4 °C23 April 1950	15.7 °C3 January 1950	27.4 °C	1,342 mm	304
1949	37.8 °C14 May 1949	14.5 °C17 January 1949	27.6 °C	960 mm	327
1948	37.6 °C13 March 1948	14.7 °C2 January 1948	27.3 °C	1,364 mm	313
1947	38.4 °C7 March 1947	15.2 °C30 December 1947	27.8 °C	1,191 mm	340
1946	37.9 °C12 March 1946	15.4 °C8 January 1946	27.2 °C	1,385 mm	327
1945	37.3 °C3 March 1945	15.6 °C31 December 1945	27.2 °C	1,514 mm	313
1944	39.6 °C4 May 1944	14.6 °C21 December 1944	27.4 °C	1,491 mm	298
1943	37.8 °C7 April 1943	15.8 °C13 January 1943	26.8 °C	1,502 mm	292
1942	37.1 °C25 April 1942	15.1 °C17 December 1942	26.8 °C	1,352 mm	278
1941	38.6 °C1 March 1941	18.9 °C31 December 1941	27.3 °C	1,521 mm	271
1940	39.0 °C11 March 1940	13.2 °C5 January 1940	26.9 °C	1,652 mm	278

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

33.2 °C

0.0 °C

Hot days (≥ 30 °C)

341 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1514 mm

+192 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	31.6 °C	-0.6 °C	0 mm	-15 mm
Feb	33.9 °C	+0.3 °C	24 mm	-3 mm
Mar	35.5 °C	+0.3 °C	53 mm	+6 mm
Apr	36.0 °C	0.0 °C	72 mm	-8 mm
May	33.7 °C	-0.9 °C	257 mm	+98 mm
Jun	33.7 °C	+0.2 °C	137 mm	-17 mm
Jul	32.9 °C	0.0 °C	191 mm	+34 mm
Aug	33.8 °C	+1.0 °C	159 mm	-15 mm
Sep	32.4 °C	+0.2 °C	367 mm	+97 mm
Oct	32.7 °C	+0.9 °C	138 mm	-46 mm
Nov	30.3 °C	-1.4 °C	106 mm	+59 mm
Dec	31.9 °C	+0.5 °C	10 mm	+2 mm

The year's extremes

Hottest day

38.6 °C

26 Apr 2025

Coldest day

16.9 °C

29 Nov 2025

Wettest day

65.2 mm

7 Sep 2025

Windiest day

22.6 km/h

22 Jul 2025

Strongest gust

67.3 km/h

23 Jul 2025

Hottest feels-like

44.6 °C

25 Apr 2025

Coldest feels-like

15.2 °C

28 Nov 2025

Sunniest day

12.7 h

17 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 Phra Nakhon Si Ayutthaya?

Phra Nakhon Si Ayutthaya has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.2 °C and it receives 1,322 mm of precipitation per year.

What is the hottest day ever recorded in Phra Nakhon Si Ayutthaya?

The hottest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 4 May 1980, reaching 41.8 °C.

What is the coldest day in Phra Nakhon Si Ayutthaya?

The coldest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 12 January 1955, at 11.8 °C.

Does it snow in Phra Nakhon Si Ayutthaya?

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

Has the climate of Phra Nakhon Si Ayutthaya warmed?

Yes: Phra Nakhon Si Ayutthaya warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Phra Nakhon Si Ayutthaya?

The wettest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 12 September 2006, with 122 mm of rain in 24 hours.

What was the windiest day in Phra Nakhon Si Ayutthaya?

The windiest day measured in Phra Nakhon Si Ayutthaya between 1940 and 2025 was 3 November 2009, with winds reaching 29.8 km/h.

What is the warmest month in Phra Nakhon Si Ayutthaya?

The warmest month in Phra Nakhon Si Ayutthaya is April (30.4 °C on average); the coldest is December (25.9 °C).

How much does it rain in Phra Nakhon Si Ayutthaya?

Phra Nakhon Si Ayutthaya receives on average 1,322 mm of precipitation per year, spread over about 180 rainy days.

Is it sunny in Phra Nakhon Si Ayutthaya?

Phra Nakhon Si Ayutthaya gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

Are there tropical nights in Phra Nakhon Si Ayutthaya?

Yes: Phra Nakhon Si Ayutthaya has on average 341 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Phra Nakhon Si Ayutthaya?

In Phra Nakhon Si Ayutthaya, between 1940 and 2025, the highest apparent temperature reached 47.8 °C on 18 April 1953, and the lowest was 8.6 °C on 12 January 1955.

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