San Marcos climate — normals and trends

Q: What is the climate of San Marcos?

San Marcos has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 27.2 °C and it receives 2,451 mm of precipitation per year.

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

The hottest day measured in San Marcos between 1940 and 2025 was 26 March 2016, reaching 40.3 °C.

Q: What is the coldest day in San Marcos?

The coldest day measured in San Marcos between 1940 and 2025 was 18 December 1949, at 19.8 °C.

Q: Does it snow in San Marcos?

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

Q: Has the climate of San Marcos warmed?

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

Q: What is the wettest day in San Marcos?

The wettest day measured in San Marcos between 1940 and 2025 was 29 April 1984, with 197 mm of rain in 24 hours.

Q: What was the windiest day in San Marcos?

The windiest day measured in San Marcos between 1940 and 2025 was 10 March 2003, with winds reaching 24.8 km/h.

Q: What is the warmest month in San Marcos?

The warmest month in San Marcos is March (28.4 °C on average); the coldest is October (26.5 °C).

Q: How much does it rain in San Marcos?

San Marcos receives on average 2,451 mm of precipitation per year, spread over about 287 rainy days.

Q: Is it sunny in San Marcos?

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

San Marcos (Colombia) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 27.2 °C and it receives 2,451 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 (28.4 °C on average) and the coldest is October (26.5 °C). Rainfall peaks in May.

San Marcos averages 0 frost days, 285 hot days (≥ 30 °C) and 287 rainy days per year.

San Marcos 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 40.3 °C (on 26 March 2016) and the coldest 19.8 °C (on 18 December 1949).

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

San MarcosSucre Department

coords: 8.66°, -75.13°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthMarchColdest monthOctoberWettest monthMayDriest monthJanuary

Mean daily temperature

27.2°C

Average daily high

31.6°C

Average daily low

24.1°C

Annual rainfall

2,451mm

Sunshine / day

9.6h

Mean relative humidity

83%

Average peak wind

10.2km/h

Seasonal range

1.9°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

285 d/yr

Rainy days (≥ 1 mm)

287 d/yr

Annual snowfall

0.0 cm

Average feels-like high

38.0 °C

Average feels-like low

28.9 °C

Average peak gust

22.4 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

17.7 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.5 °C

since 1940

+0.3 °C per decade · r² = 0.70 · 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

40.3 °C

26 March 2016

Coldest day

19.8 °C

18 December 1949

Wettest day

197 mm

29 April 1984

Windiest day

24.8 km/h

10 March 2003

Strongest gust

56.2 km/h

1 October 2016

Hottest feels-like

45.6 °C

24 March 2025

Coldest feels-like

22.3 °C

10 January 1951

Sunniest day

12.0 h

29 March 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	37.9 °C23 March 2025	23.5 °C29 November 2025	28.3 °C	2,169 mm	327
2024	38.9 °C10 April 2024	23.4 °C8 December 2024	28.9 °C	1,884 mm	347
2023	39.1 °C2 April 2023	22.9 °C2 February 2023	28.8 °C	1,792 mm	358
2022	38.1 °C24 March 2022	22.0 °C30 October 2022	27.9 °C	2,054 mm	344
2021	39.1 °C26 February 2021	23.4 °C6 January 2021	28.1 °C	2,046 mm	335
2020	39.2 °C19 February 2020	22.9 °C7 January 2020	28.6 °C	1,711 mm	351
2019	39.0 °C28 February 2019	22.7 °C3 January 2019	28.9 °C	1,384 mm	355
2018	38.5 °C11 March 2018	23.1 °C28 December 2018	28.3 °C	1,708 mm	345
2017	39.3 °C4 March 2017	22.1 °C25 January 2017	28.6 °C	1,638 mm	350
2016	40.3 °C26 March 2016	23.1 °C22 November 2016	28.9 °C	2,169 mm	355
2015	39.5 °C12 March 2015	23.5 °C7 January 2015	29.0 °C	1,987 mm	359
2014	38.7 °C21 February 2014	23.4 °C15 November 2014	28.6 °C	2,010 mm	354
2013	38.2 °C25 February 2013	22.4 °C2 November 2013	28.3 °C	2,271 mm	353
2012	38.2 °C25 February 2012	23.3 °C21 January 2012	28.2 °C	2,294 mm	359
2011	35.2 °C26 February 2011	22.1 °C21 October 2011	27.6 °C	2,758 mm	335
2010	38.8 °C2 February 2010	22.5 °C21 December 2010	28.1 °C	2,832 mm	340
2009	37.1 °C15 March 2009	23.1 °C26 January 2009	28.1 °C	2,309 mm	353
2008	36.3 °C16 March 2008	22.0 °C3 January 2008	27.5 °C	2,389 mm	319
2007	39.2 °C26 February 2007	22.6 °C5 December 2007	27.7 °C	2,618 mm	320
2006	38.6 °C18 February 2006	22.7 °C3 December 2006	27.7 °C	2,459 mm	338
2005	37.8 °C25 February 2005	22.8 °C20 January 2005	28.1 °C	2,263 mm	350
2004	38.2 °C24 March 2004	22.0 °C1 January 2004	27.9 °C	2,150 mm	345
2003	39.0 °C7 February 2003	22.7 °C31 October 2003	27.9 °C	2,480 mm	344
2002	38.5 °C9 March 2002	22.6 °C10 January 2002	27.9 °C	1,936 mm	357
2001	35.7 °C13 February 2001	22.3 °C6 January 2001	27.2 °C	2,061 mm	333
2000	36.4 °C29 March 2000	21.4 °C15 January 2000	27.0 °C	2,256 mm	322
1999	34.1 °C24 May 1999	20.9 °C26 November 1999	26.5 °C	2,477 mm	270
1998	39.1 °C20 March 1998	22.3 °C23 December 1998	27.8 °C	2,366 mm	314
1997	37.0 °C6 March 1997	22.5 °C5 January 1997	27.8 °C	1,793 mm	338
1996	34.2 °C9 June 1996	21.5 °C28 January 1996	26.6 °C	2,596 mm	268
1995	38.1 °C13 February 1995	22.5 °C19 August 1995	27.4 °C	2,303 mm	293
1994	35.6 °C10 February 1994	21.6 °C29 December 1994	27.0 °C	2,549 mm	301
1993	37.4 °C13 March 1993	22.5 °C10 January 1993	27.0 °C	2,768 mm	305
1992	37.3 °C9 April 1992	22.1 °C20 December 1992	27.1 °C	2,387 mm	290
1991	37.7 °C25 February 1991	21.6 °C22 December 1991	27.4 °C	2,291 mm	308
1990	36.2 °C14 March 1990	22.3 °C2 January 1990	26.9 °C	2,409 mm	300
1989	36.3 °C14 February 1989	21.5 °C16 February 1989	26.7 °C	2,601 mm	279
1988	38.2 °C21 March 1988	21.8 °C20 December 1988	27.1 °C	2,561 mm	294
1987	36.6 °C24 February 1987	21.7 °C8 January 1987	27.5 °C	2,599 mm	325
1986	35.1 °C27 March 1986	22.3 °C8 February 1986	26.7 °C	2,419 mm	291
1985	38.3 °C25 March 1985	21.7 °C30 December 1985	26.7 °C	2,415 mm	259
1984	33.8 °C28 March 1984	21.0 °C8 November 1984	26.1 °C	2,699 mm	222
1983	35.1 °C20 March 1983	22.1 °C9 December 1983	27.2 °C	2,398 mm	268
1982	34.2 °C13 March 1982	21.7 °C19 January 1982	27.0 °C	2,269 mm	309
1981	37.2 °C2 April 1981	21.5 °C3 January 1981	27.1 °C	2,858 mm	331
1980	37.3 °C28 February 1980	22.0 °C9 November 1980	27.8 °C	2,187 mm	339
1979	36.8 °C31 March 1979	21.2 °C7 January 1979	27.5 °C	2,607 mm	320
1978	36.6 °C2 February 1978	22.5 °C2 January 1978	27.2 °C	2,786 mm	322
1977	37.5 °C6 March 1977	22.4 °C13 January 1977	27.7 °C	2,528 mm	329
1976	35.7 °C19 March 1976	20.8 °C31 January 1976	27.2 °C	2,161 mm	336
1975	35.4 °C11 February 1975	21.1 °C25 December 1975	26.9 °C	2,837 mm	292
1974	35.0 °C24 February 1974	21.8 °C23 January 1974	26.8 °C	2,979 mm	300
1973	37.4 °C6 March 1973	22.0 °C15 December 1973	27.5 °C	2,939 mm	320
1972	35.4 °C4 April 1972	22.1 °C13 March 1972	27.4 °C	2,715 mm	335
1971	34.7 °C26 April 1971	21.9 °C24 November 1971	26.6 °C	2,922 mm	294
1970	36.9 °C21 March 1970	22.1 °C27 November 1970	27.2 °C	3,177 mm	330
1969	37.6 °C20 March 1969	22.1 °C2 February 1969	27.7 °C	2,651 mm	335
1968	36.3 °C24 February 1968	21.6 °C9 January 1968	27.3 °C	2,566 mm	337
1967	36.2 °C6 March 1967	22.2 °C24 November 1967	27.3 °C	2,348 mm	331
1966	35.5 °C24 March 1966	22.0 °C13 February 1966	27.2 °C	2,782 mm	328
1965	34.5 °C15 February 1965	21.5 °C3 January 1965	27.1 °C	2,512 mm	328
1964	35.8 °C3 February 1964	21.5 °C29 December 1964	26.9 °C	2,497 mm	292
1963	35.2 °C29 January 1963	21.9 °C16 January 1963	26.9 °C	2,634 mm	316
1962	36.2 °C24 February 1962	22.0 °C12 January 1962	26.8 °C	2,411 mm	303
1961	35.4 °C5 March 1961	22.2 °C24 September 1961	27.0 °C	2,237 mm	311
1960	34.2 °C3 March 1960	21.9 °C22 December 1960	26.6 °C	2,541 mm	285
1959	35.6 °C15 February 1959	22.0 °C19 November 1959	26.8 °C	2,595 mm	295
1958	37.4 °C11 March 1958	22.4 °C8 November 1958	27.7 °C	2,617 mm	347
1957	34.2 °C9 July 1957	21.4 °C13 January 1957	27.1 °C	2,355 mm	307
1956	31.6 °C5 August 1956	20.2 °C9 January 1956	25.5 °C	3,004 mm	95
1955	32.3 °C13 March 1955	21.1 °C22 January 1955	25.6 °C	2,652 mm	115
1954	32.4 °C5 March 1954	21.5 °C31 January 1954	25.8 °C	2,682 mm	138
1953	34.4 °C15 March 1953	22.3 °C20 January 1953	26.5 °C	2,363 mm	215
1952	35.0 °C23 March 1952	21.2 °C5 January 1952	26.3 °C	2,672 mm	186
1951	32.8 °C19 March 1951	20.3 °C9 January 1951	26.1 °C	2,636 mm	177
1950	31.8 °C27 January 1950	20.3 °C9 January 1950	25.5 °C	3,088 mm	104
1949	35.2 °C19 March 1949	19.8 °C18 December 1949	26.3 °C	2,426 mm	175
1948	33.3 °C4 March 1948	21.1 °C19 April 1948	25.9 °C	2,959 mm	117
1947	31.6 °C15 March 1947	21.0 °C3 January 1947	25.6 °C	2,916 mm	64
1946	33.0 °C9 February 1946	21.6 °C10 January 1946	25.8 °C	2,749 mm	119
1945	32.8 °C28 February 1945	21.0 °C13 January 1945	25.7 °C	2,734 mm	93
1944	33.4 °C3 April 1944	21.7 °C1 January 1944	26.2 °C	2,655 mm	169
1943	31.8 °C27 May 1943	20.9 °C9 February 1943	25.6 °C	2,856 mm	80
1942	32.7 °C16 March 1942	21.4 °C9 January 1942	25.8 °C	2,829 mm	151
1941	36.3 °C20 April 1941	21.0 °C12 January 1941	26.7 °C	2,049 mm	243
1940	33.5 °C14 March 1940	21.5 °C18 January 1940	25.8 °C	2,576 mm	124

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

+0.7 °C

Hot days (≥ 30 °C)

327 d/yr

+42

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2169 mm

-282 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	33.1 °C	+1.2 °C	22 mm	-20 mm
Feb	34.0 °C	+0.6 °C	38 mm	-9 mm
Mar	34.4 °C	+0.9 °C	81 mm	-6 mm
Apr	31.9 °C	-0.2 °C	249 mm	+25 mm
May	31.6 °C	+0.4 °C	297 mm	-38 mm
Jun	31.7 °C	+0.6 °C	254 mm	-34 mm
Jul	32.6 °C	+1.2 °C	209 mm	-54 mm
Aug	32.0 °C	+0.8 °C	244 mm	-37 mm
Sep	31.7 °C	+0.8 °C	202 mm	-76 mm
Oct	31.1 °C	+0.5 °C	269 mm	-25 mm
Nov	31.4 °C	+0.8 °C	216 mm	+5 mm
Dec	31.8 °C	+0.9 °C	87 mm	-12 mm

The year's extremes

Hottest day

37.9 °C

23 Mar 2025

Coldest day

23.5 °C

29 Nov 2025

Wettest day

27.4 mm

23 Jun 2025

Windiest day

18.7 km/h

11 Mar 2025

Strongest gust

33.5 km/h

27 Oct 2025

Hottest feels-like

45.6 °C

24 Mar 2025

Coldest feels-like

27.5 °C

26 Apr 2025

Sunniest day

12.0 h

31 Mar 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 San Marcos?

San Marcos has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 27.2 °C and it receives 2,451 mm of precipitation per year.

What is the hottest day ever recorded in San Marcos?

The hottest day measured in San Marcos between 1940 and 2025 was 26 March 2016, reaching 40.3 °C.

What is the coldest day in San Marcos?

The coldest day measured in San Marcos between 1940 and 2025 was 18 December 1949, at 19.8 °C.

Does it snow in San Marcos?

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

Has the climate of San Marcos warmed?

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

What is the wettest day in San Marcos?

The wettest day measured in San Marcos between 1940 and 2025 was 29 April 1984, with 197 mm of rain in 24 hours.

What was the windiest day in San Marcos?

The windiest day measured in San Marcos between 1940 and 2025 was 10 March 2003, with winds reaching 24.8 km/h.

What is the warmest month in San Marcos?

The warmest month in San Marcos is March (28.4 °C on average); the coldest is October (26.5 °C).

How much does it rain in San Marcos?

San Marcos receives on average 2,451 mm of precipitation per year, spread over about 287 rainy days.

Is it sunny in San Marcos?

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

Are there tropical nights in San Marcos?

Yes: San Marcos has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in San Marcos?

In San Marcos, between 1940 and 2025, the highest apparent temperature reached 45.6 °C on 24 March 2025, and the lowest was 22.3 °C on 10 January 1951.

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