Nakhon Sawan climate — normals and trends

Q: What is the climate of Nakhon Sawan?

Nakhon Sawan has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.4 °C and it receives 1,261 mm of precipitation per year.

Q: What is the hottest day ever recorded in Nakhon Sawan?

The hottest day measured in Nakhon Sawan between 1940 and 2025 was 17 April 2016, reaching 43.7 °C.

Q: What is the coldest day in Nakhon Sawan?

The coldest day measured in Nakhon Sawan between 1940 and 2025 was 25 December 1999, at 7.7 °C.

Q: Does it snow in Nakhon Sawan?

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

Q: Has the climate of Nakhon Sawan warmed?

Yes: Nakhon Sawan warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Nakhon Sawan?

The wettest day measured in Nakhon Sawan between 1940 and 2025 was 19 September 1978, with 133 mm of rain in 24 hours.

Q: What was the windiest day in Nakhon Sawan?

The windiest day measured in Nakhon Sawan between 1940 and 2025 was 10 May 1986, with winds reaching 30.4 km/h.

Q: What is the warmest month in Nakhon Sawan?

The warmest month in Nakhon Sawan is April (31.5 °C on average); the coldest is December (24.8 °C).

Q: How much does it rain in Nakhon Sawan?

Nakhon Sawan receives on average 1,261 mm of precipitation per year, spread over about 166 rainy days.

Q: Is it sunny in Nakhon Sawan?

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

Nakhon Sawan (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 28.4 °C and it receives 1,261 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 (31.5 °C on average) and the coldest is December (24.8 °C). Rainfall peaks in September.

Nakhon Sawan averages 0 frost days, 330 hot days (≥ 30 °C) and 166 rainy days per year.

Nakhon Sawan has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.

The hottest day of the period reached 43.7 °C (on 17 April 2016) and the coldest 7.7 °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

Nakhon SawanNakhon Sawan

coords: 15.70°, 100.14°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthDecemberWettest monthSeptemberDriest monthDecember

Mean daily temperature

28.4°C

Average daily high

33.8°C

Average daily low

24.2°C

Annual rainfall

1,261mm

Sunshine / day

10.1h

Mean relative humidity

69%

Average peak wind

11.6km/h

Seasonal range

6.7°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

330 d/yr

Rainy days (≥ 1 mm)

166 d/yr

Annual snowfall

0.0 cm

Average feels-like high

38.3 °C

Average feels-like low

27.8 °C

Average peak gust

28.2 km/h

Tropical nights (≥ 20 °C)

326 d/yr

Solar radiation

18.7 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.0 °C

since 1940

+0.2 °C per decade · r² = 0.66 · 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

43.7 °C

17 April 2016

Coldest day

7.7 °C

25 December 1999

Wettest day

133 mm

19 September 1978

Windiest day

30.4 km/h

10 May 1986

Strongest gust

67.3 km/h

3 August 2020

Hottest feels-like

49.6 °C

26 April 2016

Coldest feels-like

5.9 °C

13 January 1955

Sunniest day

12.9 h

5 July 1943

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	40.5 °C6 April 2025	14.0 °C28 November 2025	28.7 °C	1,353 mm	336
2024	43.3 °C29 April 2024	17.3 °C21 December 2024	29.7 °C	1,161 mm	352
2023	42.1 °C7 May 2023	14.8 °C31 January 2023	29.5 °C	1,098 mm	349
2022	40.3 °C16 April 2022	17.2 °C19 December 2022	28.8 °C	1,372 mm	339
2021	40.5 °C23 May 2021	14.5 °C14 January 2021	28.8 °C	1,533 mm	338
2020	42.4 °C21 April 2020	16.4 °C23 December 2020	29.6 °C	1,136 mm	339
2019	42.3 °C1 May 2019	14.2 °C10 December 2019	29.7 °C	1,141 mm	352
2018	40.4 °C15 April 2018	16.8 °C14 January 2018	28.9 °C	1,064 mm	346
2017	40.0 °C22 April 2017	12.5 °C21 December 2017	28.8 °C	1,485 mm	341
2016	43.7 °C17 April 2016	12.5 °C9 February 2016	29.5 °C	1,252 mm	344
2015	41.8 °C20 April 2015	16.0 °C3 January 2015	29.5 °C	999 mm	345
2014	40.3 °C22 April 2014	11.9 °C24 January 2014	29.0 °C	991 mm	345
2013	41.0 °C1 May 2013	14.3 °C30 December 2013	28.8 °C	1,214 mm	335
2012	40.5 °C26 April 2012	19.5 °C10 January 2012	29.2 °C	1,214 mm	362
2011	38.4 °C18 April 2011	16.0 °C27 December 2011	28.0 °C	1,606 mm	329
2010	42.4 °C9 May 2010	17.1 °C30 December 2010	29.4 °C	1,259 mm	345
2009	40.9 °C24 April 2009	12.1 °C12 January 2009	28.5 °C	1,353 mm	342
2008	39.5 °C10 April 2008	14.9 °C3 January 2008	28.4 °C	1,430 mm	331
2007	41.7 °C1 April 2007	14.3 °C4 February 2007	29.0 °C	1,412 mm	342
2006	40.9 °C13 April 2006	12.8 °C24 December 2006	29.2 °C	1,370 mm	348
2005	42.0 °C28 April 2005	14.6 °C3 January 2005	29.5 °C	1,130 mm	343
2004	42.8 °C15 April 2004	15.8 °C15 December 2004	29.1 °C	960 mm	354
2003	42.2 °C7 May 2003	15.8 °C22 December 2003	28.9 °C	1,121 mm	356
2002	41.5 °C22 April 2002	16.4 °C4 January 2002	29.2 °C	1,230 mm	349
2001	41.3 °C23 April 2001	15.6 °C27 November 2001	28.8 °C	1,261 mm	332
2000	40.9 °C4 April 2000	15.0 °C3 February 2000	28.3 °C	1,374 mm	337
1999	40.6 °C4 April 1999	7.7 °C25 December 1999	28.2 °C	1,544 mm	324
1998	42.9 °C16 April 1998	16.4 °C13 December 1998	29.9 °C	978 mm	349
1997	40.6 °C4 May 1997	15.8 °C13 January 1997	29.3 °C	962 mm	355
1996	39.8 °C22 March 1996	12.6 °C2 January 1996	28.1 °C	1,487 mm	330
1995	42.5 °C23 April 1995	13.3 °C7 January 1995	28.7 °C	1,460 mm	335
1994	41.1 °C12 April 1994	15.3 °C27 December 1994	28.4 °C	1,414 mm	345
1993	41.4 °C4 May 1993	11.6 °C28 December 1993	28.6 °C	1,051 mm	339
1992	42.9 °C21 April 1992	12.2 °C3 December 1992	28.5 °C	1,313 mm	322
1991	42.1 °C1 May 1991	16.4 °C17 November 1991	29.0 °C	1,194 mm	353
1990	42.6 °C23 April 1990	14.8 °C7 December 1990	29.1 °C	1,156 mm	347
1989	40.9 °C16 April 1989	14.3 °C4 December 1989	28.6 °C	1,158 mm	346
1988	40.4 °C17 March 1988	14.2 °C14 December 1988	28.5 °C	1,419 mm	326
1987	41.5 °C26 April 1987	12.3 °C9 December 1987	29.0 °C	1,084 mm	331
1986	40.6 °C27 March 1986	12.1 °C8 January 1986	28.3 °C	1,113 mm	339
1985	42.2 °C13 April 1985	13.1 °C25 December 1985	28.3 °C	1,210 mm	334
1984	41.2 °C9 April 1984	12.2 °C10 January 1984	28.3 °C	1,081 mm	343
1983	43.6 °C14 April 1983	13.0 °C2 December 1983	28.8 °C	1,262 mm	309
1982	41.0 °C3 May 1982	11.5 °C22 December 1982	28.6 °C	1,014 mm	340
1981	40.6 °C6 April 1981	13.2 °C15 January 1981	28.2 °C	1,072 mm	324
1980	42.6 °C2 May 1980	15.9 °C25 December 1980	28.9 °C	1,287 mm	347
1979	40.5 °C9 April 1979	15.8 °C29 December 1979	28.7 °C	1,254 mm	347
1978	42.1 °C23 March 1978	12.7 °C16 December 1978	28.7 °C	1,514 mm	341
1977	42.3 °C18 April 1977	15.1 °C19 November 1977	28.4 °C	1,150 mm	340
1976	42.5 °C17 April 1976	9.4 °C1 January 1976	27.8 °C	1,564 mm	324
1975	42.3 °C29 April 1975	9.0 °C31 December 1975	27.8 °C	1,594 mm	316
1974	41.2 °C21 April 1974	8.7 °C2 January 1974	27.9 °C	1,478 mm	326
1973	42.2 °C15 April 1973	9.4 °C27 December 1973	28.4 °C	1,186 mm	334
1972	43.4 °C5 May 1972	13.6 °C16 January 1972	28.7 °C	1,484 mm	330
1971	41.5 °C8 April 1971	11.5 °C11 January 1971	27.8 °C	1,127 mm	316
1970	43.1 °C12 May 1970	16.9 °C4 January 1970	28.3 °C	1,228 mm	335
1969	42.0 °C22 April 1969	13.4 °C6 December 1969	28.7 °C	1,375 mm	316
1968	42.5 °C27 May 1968	13.1 °C6 January 1968	28.5 °C	1,076 mm	356
1967	41.0 °C31 March 1967	12.5 °C17 January 1967	28.0 °C	1,155 mm	328
1966	39.8 °C10 April 1966	15.2 °C2 January 1966	27.7 °C	1,545 mm	298
1965	41.2 °C18 April 1965	13.5 °C20 January 1965	28.1 °C	1,262 mm	344
1964	41.9 °C7 April 1964	12.0 °C21 December 1964	27.9 °C	1,339 mm	307
1963	42.6 °C17 May 1963	10.2 °C29 January 1963	27.8 °C	1,380 mm	311
1962	41.8 °C15 April 1962	11.7 °C7 December 1962	27.9 °C	1,166 mm	321
1961	40.6 °C14 April 1961	10.5 °C19 January 1961	28.0 °C	1,119 mm	332
1960	42.7 °C28 April 1960	10.5 °C4 January 1960	28.7 °C	1,103 mm	338
1959	41.0 °C18 June 1959	15.7 °C21 January 1959	28.4 °C	1,104 mm	338
1958	41.3 °C25 April 1958	14.9 °C16 December 1958	28.1 °C	1,085 mm	309
1957	41.1 °C15 May 1957	13.2 °C6 February 1957	27.9 °C	1,521 mm	343
1956	40.2 °C26 March 1956	13.0 °C17 January 1956	27.3 °C	1,357 mm	309
1955	40.4 °C18 April 1955	8.9 °C13 January 1955	27.2 °C	1,308 mm	317
1954	40.7 °C18 April 1954	13.0 °C17 December 1954	27.7 °C	1,065 mm	338
1953	37.2 °C15 April 1953	12.4 °C13 December 1953	26.3 °C	2,149 mm	259
1952	40.7 °C1 May 1952	12.8 °C12 December 1952	27.6 °C	1,539 mm	307
1951	40.6 °C9 April 1951	13.8 °C2 January 1951	27.8 °C	1,018 mm	306
1950	41.3 °C24 April 1950	13.3 °C2 January 1950	27.6 °C	1,330 mm	301
1949	38.6 °C26 February 1949	12.9 °C18 January 1949	27.7 °C	979 mm	326
1948	39.0 °C22 March 1948	12.1 °C3 January 1948	27.3 °C	1,416 mm	313
1947	39.4 °C7 March 1947	14.5 °C30 December 1947	28.2 °C	984 mm	339
1946	40.4 °C28 March 1946	13.7 °C10 January 1946	27.8 °C	944 mm	337
1945	38.9 °C1 April 1945	14.8 °C19 January 1945	27.3 °C	1,157 mm	316
1944	42.1 °C4 May 1944	12.9 °C22 December 1944	27.6 °C	1,407 mm	307
1943	39.0 °C5 April 1943	14.1 °C15 January 1943	26.9 °C	1,345 mm	296
1942	38.7 °C25 April 1942	13.0 °C17 December 1942	26.8 °C	1,342 mm	262
1941	39.3 °C5 April 1941	17.5 °C24 January 1941	27.3 °C	1,179 mm	276
1940	39.1 °C11 March 1940	12.5 °C1 January 1940	26.9 °C	1,356 mm	272

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

33.9 °C

+0.1 °C

Hot days (≥ 30 °C)

336 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1353 mm

+92 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	31.5 °C	-0.6 °C	0 mm	-10 mm
Feb	34.4 °C	-0.2 °C	37 mm	+21 mm
Mar	36.9 °C	+0.1 °C	19 mm	-19 mm
Apr	37.7 °C	+0.2 °C	64 mm	-2 mm
May	34.9 °C	-0.8 °C	208 mm	+58 mm
Jun	35.3 °C	+0.8 °C	127 mm	-21 mm
Jul	34.0 °C	+0.2 °C	148 mm	-5 mm
Aug	34.8 °C	+1.6 °C	173 mm	-19 mm
Sep	33.3 °C	+0.8 °C	285 mm	-1 mm
Oct	33.0 °C	+1.0 °C	130 mm	-29 mm
Nov	30.2 °C	-1.3 °C	149 mm	+112 mm
Dec	31.2 °C	+0.3 °C	14 mm	+8 mm

The year's extremes

Hottest day

40.5 °C

6 Apr 2025

Coldest day

14.0 °C

28 Nov 2025

Wettest day

41.4 mm

2 Nov 2025

Windiest day

26.3 km/h

27 Jan 2025

Strongest gust

53.3 km/h

27 Jan 2025

Hottest feels-like

46.8 °C

25 Apr 2025

Coldest feels-like

13.7 °C

28 Nov 2025

Sunniest day

12.7 h

24 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 Nakhon Sawan?

Nakhon Sawan has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.4 °C and it receives 1,261 mm of precipitation per year.

What is the hottest day ever recorded in Nakhon Sawan?

The hottest day measured in Nakhon Sawan between 1940 and 2025 was 17 April 2016, reaching 43.7 °C.

What is the coldest day in Nakhon Sawan?

The coldest day measured in Nakhon Sawan between 1940 and 2025 was 25 December 1999, at 7.7 °C.

Does it snow in Nakhon Sawan?

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

Has the climate of Nakhon Sawan warmed?

Yes: Nakhon Sawan warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Nakhon Sawan?

The wettest day measured in Nakhon Sawan between 1940 and 2025 was 19 September 1978, with 133 mm of rain in 24 hours.

What was the windiest day in Nakhon Sawan?

The windiest day measured in Nakhon Sawan between 1940 and 2025 was 10 May 1986, with winds reaching 30.4 km/h.

What is the warmest month in Nakhon Sawan?

The warmest month in Nakhon Sawan is April (31.5 °C on average); the coldest is December (24.8 °C).

How much does it rain in Nakhon Sawan?

Nakhon Sawan receives on average 1,261 mm of precipitation per year, spread over about 166 rainy days.

Is it sunny in Nakhon Sawan?

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

Are there tropical nights in Nakhon Sawan?

Yes: Nakhon Sawan has on average 326 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Nakhon Sawan?

In Nakhon Sawan, between 1940 and 2025, the highest apparent temperature reached 49.6 °C on 26 April 2016, and the lowest was 5.9 °C on 13 January 1955.

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