Ban Na San climate — normals and trends

Q: What is the climate of Ban Na San?

Ban Na San has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 2,022 mm of precipitation per year.

Q: What is the hottest day ever recorded in Ban Na San?

The hottest day measured in Ban Na San between 1940 and 2025 was 11 April 2016, reaching 40.9 °C.

Q: What is the coldest day in Ban Na San?

The coldest day measured in Ban Na San between 1940 and 2025 was 2 January 1957, at 13.2 °C.

Q: Does it snow in Ban Na San?

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

Q: Has the climate of Ban Na San warmed?

Yes: Ban Na San warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Ban Na San?

The wettest day measured in Ban Na San between 1940 and 2025 was 25 November 2005, with 179 mm of rain in 24 hours.

Q: What was the windiest day in Ban Na San?

The windiest day measured in Ban Na San between 1940 and 2025 was 4 January 2019, with winds reaching 27.1 km/h.

Q: What is the warmest month in Ban Na San?

The warmest month in Ban Na San is March (28.1 °C on average); the coldest is December (25.1 °C).

Q: How much does it rain in Ban Na San?

Ban Na San receives on average 2,022 mm of precipitation per year, spread over about 240 rainy days.

Q: Is it sunny in Ban Na San?

Ban Na San gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.

Ban Na San (Thailand) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.4 °C and it receives 2,022 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 March (28.1 °C on average) and the coldest is December (25.1 °C). Rainfall peaks in October.

Ban Na San averages 0 frost days, 252 hot days (≥ 30 °C) and 240 rainy days per year.

Ban Na San has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.9 °C (on 11 April 2016) and the coldest 13.2 °C (on 2 January 1957).

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

Ban Na SanSurat Thani

coords: 8.80°, 99.36°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthMarchColdest monthDecemberWettest monthOctoberDriest monthFebruary

Mean daily temperature

26.4°C

Average daily high

31.4°C

Average daily low

22.9°C

Annual rainfall

2,022mm

Sunshine / day

9.6h

Mean relative humidity

83%

Average peak wind

11.4km/h

Seasonal range

3.0°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

252 d/yr

Rainy days (≥ 1 mm)

240 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.8 °C

Average feels-like low

27.3 °C

Average peak gust

30.1 km/h

Tropical nights (≥ 20 °C)

351 d/yr

Solar radiation

18.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.5 °C

since 1940

+0.3 °C per decade · r² = 0.76 · 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

40.9 °C

11 April 2016

Coldest day

13.2 °C

2 January 1957

Wettest day

179 mm

25 November 2005

Windiest day

27.1 km/h

4 January 2019

Strongest gust

69.5 km/h

9 August 2007

Hottest feels-like

47.9 °C

2 May 2024

Coldest feels-like

13.6 °C

2 January 1957

Sunniest day

12.5 h

13 June 2024

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.3 °C7 March 2025	19.2 °C2 February 2025	27.2 °C	2,241 mm	309
2024	39.8 °C18 April 2024	21.2 °C25 December 2024	28.3 °C	2,026 mm	328
2023	39.0 °C12 April 2023	18.5 °C17 January 2023	27.6 °C	2,031 mm	316
2022	36.9 °C28 April 2022	19.2 °C30 December 2022	27.1 °C	2,553 mm	312
2021	37.5 °C26 February 2021	18.5 °C23 February 2021	27.1 °C	2,162 mm	306
2020	39.9 °C13 April 2020	19.0 °C5 February 2020	27.8 °C	2,066 mm	326
2019	38.8 °C22 March 2019	19.7 °C27 January 2019	27.5 °C	1,688 mm	330
2018	37.0 °C14 April 2018	18.8 °C7 February 2018	27.0 °C	2,287 mm	312
2017	36.8 °C14 March 2017	18.0 °C8 February 2017	26.9 °C	2,471 mm	298
2016	40.9 °C11 April 2016	20.0 °C22 February 2016	27.7 °C	2,094 mm	304
2015	38.8 °C2 April 2015	19.0 °C8 February 2015	27.3 °C	1,695 mm	327
2014	38.1 °C20 March 2014	16.3 °C3 February 2014	27.2 °C	1,776 mm	308
2013	38.3 °C21 March 2013	19.8 °C23 December 2013	27.1 °C	1,966 mm	308
2012	37.3 °C13 August 2012	20.6 °C7 December 2012	26.8 °C	2,247 mm	305
2011	34.6 °C1 March 2011	17.4 °C21 January 2011	26.7 °C	2,715 mm	278
2010	38.6 °C16 April 2010	20.8 °C16 February 2010	27.5 °C	2,398 mm	302
2009	36.4 °C26 February 2009	18.5 °C11 January 2009	27.0 °C	1,672 mm	317
2008	37.4 °C16 April 2008	19.9 °C22 February 2008	26.9 °C	2,032 mm	288
2007	38.6 °C17 March 2007	18.3 °C2 December 2007	27.0 °C	2,458 mm	302
2006	37.2 °C13 March 2006	18.8 °C22 January 2006	26.9 °C	1,956 mm	290
2005	39.5 °C26 April 2005	19.3 °C25 January 2005	27.5 °C	2,026 mm	299
2004	37.8 °C20 April 2004	18.6 °C22 December 2004	27.3 °C	1,476 mm	325
2003	38.6 °C17 April 2003	19.2 °C17 December 2003	27.4 °C	1,662 mm	302
2002	38.4 °C17 March 2002	18.9 °C2 January 2002	27.7 °C	1,428 mm	328
2001	34.8 °C22 April 2001	18.6 °C4 January 2001	26.4 °C	2,462 mm	255
2000	35.0 °C12 February 2000	18.3 °C5 February 2000	26.4 °C	2,637 mm	267
1999	36.2 °C22 March 1999	16.7 °C26 December 1999	26.1 °C	2,647 mm	226
1998	40.2 °C6 May 1998	21.1 °C22 December 1998	27.9 °C	2,209 mm	280
1997	37.7 °C23 April 1997	17.1 °C4 January 1997	27.1 °C	1,623 mm	315
1996	37.9 °C16 March 1996	17.5 °C28 December 1996	26.7 °C	2,384 mm	273
1995	38.7 °C7 May 1995	18.4 °C14 December 1995	27.2 °C	1,955 mm	288
1994	38.5 °C11 April 1994	18.7 °C17 January 1994	26.6 °C	1,837 mm	278
1993	37.2 °C5 May 1993	17.9 °C1 February 1993	26.6 °C	1,978 mm	266
1992	40.6 °C12 April 1992	18.0 °C19 January 1992	27.0 °C	1,822 mm	276
1991	37.5 °C16 February 1991	19.7 °C6 December 1991	27.0 °C	1,983 mm	286
1990	38.4 °C10 April 1990	18.8 °C25 December 1990	27.4 °C	1,309 mm	308
1989	36.8 °C21 March 1989	18.1 °C17 February 1989	26.7 °C	1,676 mm	301
1988	38.3 °C18 March 1988	19.1 °C17 December 1988	26.7 °C	2,043 mm	273
1987	39.7 °C12 April 1987	19.5 °C15 January 1987	27.1 °C	1,914 mm	295
1986	38.1 °C31 March 1986	18.1 °C15 January 1986	26.4 °C	2,064 mm	253
1985	37.8 °C14 April 1985	17.1 °C19 December 1985	26.3 °C	1,910 mm	268
1984	37.7 °C5 April 1984	19.7 °C19 November 1984	26.3 °C	1,950 mm	265
1983	39.5 °C12 April 1983	18.1 °C7 February 1983	27.0 °C	1,682 mm	267
1982	38.1 °C16 March 1982	17.6 °C11 January 1982	26.4 °C	1,814 mm	273
1981	39.1 °C27 March 1981	17.3 °C14 January 1981	26.7 °C	1,661 mm	284
1980	39.0 °C16 April 1980	16.5 °C31 January 1980	26.8 °C	2,006 mm	274
1979	39.5 °C26 March 1979	18.7 °C20 December 1979	26.8 °C	1,731 mm	291
1978	37.6 °C11 March 1978	17.6 °C27 November 1978	26.4 °C	1,903 mm	258
1977	37.8 °C8 April 1977	19.3 °C13 January 1977	26.6 °C	1,759 mm	269
1976	37.4 °C1 April 1976	15.4 °C19 January 1976	25.9 °C	2,000 mm	241
1975	36.8 °C26 April 1975	17.3 °C9 February 1975	25.6 °C	2,411 mm	221
1974	36.4 °C15 April 1974	16.9 °C13 January 1974	25.8 °C	1,889 mm	241
1973	38.0 °C10 April 1973	18.2 °C29 December 1973	26.3 °C	2,106 mm	238
1972	35.4 °C5 May 1972	15.9 °C15 January 1972	25.9 °C	1,999 mm	252
1971	36.5 °C23 April 1971	16.8 °C17 January 1971	25.6 °C	2,196 mm	218
1970	36.6 °C20 April 1970	17.5 °C19 December 1970	26.2 °C	1,994 mm	244
1969	36.8 °C11 March 1969	16.9 °C6 March 1969	26.3 °C	1,907 mm	252
1968	38.0 °C20 March 1968	17.1 °C25 February 1968	26.1 °C	1,488 mm	240
1967	37.7 °C3 April 1967	16.5 °C18 January 1967	25.8 °C	1,622 mm	241
1966	33.3 °C16 April 1966	18.2 °C19 January 1966	25.1 °C	2,498 mm	128
1965	37.0 °C22 March 1965	16.7 °C26 January 1965	25.8 °C	2,125 mm	234
1964	37.6 °C7 April 1964	18.5 °C27 December 1964	26.2 °C	1,749 mm	255
1963	39.4 °C30 April 1963	16.5 °C17 January 1963	26.5 °C	1,616 mm	246
1962	37.6 °C20 March 1962	16.6 °C7 February 1962	26.0 °C	1,769 mm	251
1961	38.4 °C9 April 1961	16.3 °C5 February 1961	26.0 °C	1,662 mm	237
1960	37.4 °C27 March 1960	16.0 °C6 January 1960	25.8 °C	1,925 mm	222
1959	37.0 °C13 March 1959	18.6 °C20 January 1959	26.2 °C	1,899 mm	226
1958	39.0 °C28 March 1958	17.4 °C28 November 1958	26.6 °C	1,496 mm	240
1957	35.9 °C9 March 1957	13.2 °C2 January 1957	25.7 °C	1,818 mm	226
1956	38.0 °C24 March 1956	15.6 °C23 November 1956	25.6 °C	2,427 mm	197
1955	37.2 °C22 March 1955	16.7 °C30 November 1955	25.8 °C	2,272 mm	220
1954	35.9 °C8 March 1954	16.7 °C22 November 1954	25.4 °C	2,208 mm	212
1953	32.9 °C16 April 1953	18.3 °C10 January 1953	25.3 °C	2,700 mm	179
1952	34.7 °C25 April 1952	17.6 °C15 December 1952	25.6 °C	2,201 mm	223
1951	36.8 °C3 April 1951	18.8 °C4 January 1951	26.0 °C	1,436 mm	249
1950	33.9 °C22 March 1950	17.4 °C23 January 1950	25.3 °C	2,092 mm	181
1949	36.4 °C24 March 1949	17.4 °C12 January 1949	26.1 °C	1,164 mm	231
1948	35.8 °C12 March 1948	17.5 °C4 December 1948	25.3 °C	2,091 mm	152
1947	31.7 °C8 May 1947	17.9 °C26 December 1947	24.9 °C	2,456 mm	84
1946	32.7 °C9 March 1946	15.9 °C25 January 1946	24.7 °C	2,155 mm	98
1945	31.9 °C2 April 1945	18.0 °C25 December 1945	24.4 °C	2,955 mm	39
1944	35.6 °C28 March 1944	16.8 °C29 January 1944	25.3 °C	2,222 mm	170
1943	36.3 °C24 March 1943	17.9 °C9 January 1943	24.9 °C	2,258 mm	119
1942	33.6 °C23 April 1942	17.8 °C20 February 1942	24.8 °C	1,879 mm	125
1941	34.9 °C2 March 1941	16.0 °C29 December 1941	24.8 °C	2,784 mm	102
1940	36.3 °C10 March 1940	16.0 °C5 January 1940	24.9 °C	2,321 mm	119

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

32.3 °C

+0.9 °C

Hot days (≥ 30 °C)

309 d/yr

+57

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2241 mm

+219 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	31.4 °C	+0.6 °C	26 mm	-31 mm
Feb	34.2 °C	+1.1 °C	40 mm	-1 mm
Mar	36.1 °C	+1.7 °C	52 mm	-33 mm
Apr	34.1 °C	+0.1 °C	259 mm	+105 mm
May	32.6 °C	+0.4 °C	328 mm	+126 mm
Jun	31.7 °C	+0.6 °C	148 mm	-11 mm
Jul	32.3 °C	+1.6 °C	149 mm	-23 mm
Aug	31.7 °C	+1.2 °C	164 mm	-28 mm
Sep	31.3 °C	+1.1 °C	309 mm	+61 mm
Oct	31.0 °C	+0.9 °C	350 mm	+30 mm
Nov	30.0 °C	+0.4 °C	281 mm	+18 mm
Dec	30.8 °C	+1.3 °C	135 mm	+6 mm

The year's extremes

Hottest day

38.3 °C

7 Mar 2025

Coldest day

19.2 °C

2 Feb 2025

Wettest day

61.4 mm

20 Nov 2025

Windiest day

21.9 km/h

27 Nov 2025

Strongest gust

49.7 km/h

12 Jan 2025

Hottest feels-like

44.4 °C

13 Apr 2025

Coldest feels-like

21.6 °C

2 Feb 2025

Sunniest day

12.5 h

10 Jul 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 Ban Na San?

Ban Na San has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 2,022 mm of precipitation per year.

What is the hottest day ever recorded in Ban Na San?

The hottest day measured in Ban Na San between 1940 and 2025 was 11 April 2016, reaching 40.9 °C.

What is the coldest day in Ban Na San?

The coldest day measured in Ban Na San between 1940 and 2025 was 2 January 1957, at 13.2 °C.

Does it snow in Ban Na San?

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

Has the climate of Ban Na San warmed?

Yes: Ban Na San warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Ban Na San?

The wettest day measured in Ban Na San between 1940 and 2025 was 25 November 2005, with 179 mm of rain in 24 hours.

What was the windiest day in Ban Na San?

The windiest day measured in Ban Na San between 1940 and 2025 was 4 January 2019, with winds reaching 27.1 km/h.

What is the warmest month in Ban Na San?

The warmest month in Ban Na San is March (28.1 °C on average); the coldest is December (25.1 °C).

How much does it rain in Ban Na San?

Ban Na San receives on average 2,022 mm of precipitation per year, spread over about 240 rainy days.

Is it sunny in Ban Na San?

Ban Na San gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.

Are there tropical nights in Ban Na San?

Yes: Ban Na San has on average 351 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Ban Na San?

In Ban Na San, between 1940 and 2025, the highest apparent temperature reached 47.9 °C on 2 May 2024, and the lowest was 13.6 °C on 2 January 1957.

Compare Ban Na San with another city

Pick a second city: its normals will be set against these, indicator by indicator.

Nearby cities

The climate around Ban Na San

Other cities — Thailand

All cities in Thailand →