San Marcos climate — normals and trends

Q: What is the climate of San Marcos?

San Marcos has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 14.8 °C and it receives 2,356 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 6 May 2024, reaching 27.2 °C.

Q: What is the coldest day in San Marcos?

The coldest day measured in San Marcos between 1940 and 2025 was 13 January 1956, at 2.1 °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 +2.3 °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 13 May 1997, with 163 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 2 February 1998, with winds reaching 22.4 km/h.

Q: What is the warmest month in San Marcos?

The warmest month in San Marcos is May (15.8 °C on average); the coldest is January (13.4 °C).

Q: How much does it rain in San Marcos?

San Marcos receives on average 2,356 mm of precipitation per year, spread over about 272 rainy days.

Q: Is it sunny in San Marcos?

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

San Marcos (Guatemala) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 14.8 °C and it receives 2,356 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 May (15.8 °C on average) and the coldest is January (13.4 °C). Rainfall peaks in June.

San Marcos averages 0 frost days, 0 hot days (≥ 30 °C) and 272 rainy days per year.

San Marcos has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.

The hottest day of the period reached 27.2 °C (on 6 May 2024) and the coldest 2.1 °C (on 13 January 1956).

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 MarcosSan Marcos

coords: 14.96°, -91.79°
period: 1940–2025 · 86 yrs

CwbSubtropical highland, dry winterWarmest monthMayColdest monthJanuaryWettest monthJuneDriest monthJanuary

Mean daily temperature

14.8°C

Average daily high

19.6°C

Average daily low

11.1°C

Annual rainfall

2,356mm

Sunshine / day

10.1h

Mean relative humidity

81%

Average peak wind

7.4km/h

Seasonal range

2.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

0 d/yr

Rainy days (≥ 1 mm)

272 d/yr

Annual snowfall

0.0 cm

Average feels-like high

20.9 °C

Average feels-like low

10.3 °C

Average peak gust

28.5 km/h

Tropical nights (≥ 20 °C)

0 d/yr

Solar radiation

19.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.3 °C

since 1940

+0.3 °C per decade · r² = 0.84 · 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

27.2 °C

6 May 2024

Coldest day

2.1 °C

13 January 1956

Wettest day

163 mm

13 May 1997

Windiest day

22.4 km/h

2 February 1998

Strongest gust

82.4 km/h

17 June 2024

Hottest feels-like

29.1 °C

6 May 2024

Coldest feels-like

-1.3 °C

13 January 1956

Sunniest day

12.6 h

14 July 2019

Year	Hottest day	Coldest day	Annual mean	Rainfall
2025	24.3 °C21 May 2025	7.0 °C17 January 2025	16.0 °C	2,445 mm
2024	27.2 °C6 May 2024	6.9 °C29 November 2024	16.7 °C	2,791 mm
2023	24.8 °C9 May 2023	6.2 °C19 December 2023	16.2 °C	2,415 mm
2022	24.0 °C10 May 2022	6.7 °C6 December 2022	15.6 °C	2,939 mm
2021	24.7 °C10 May 2021	6.0 °C14 February 2021	15.8 °C	2,285 mm
2020	24.8 °C2 March 2020	6.3 °C20 December 2020	16.1 °C	2,955 mm
2019	24.4 °C10 March 2019	6.8 °C25 March 2019	16.0 °C	2,299 mm
2018	24.6 °C4 May 2018	6.3 °C12 January 2018	15.6 °C	2,260 mm
2017	23.8 °C6 April 2017	6.1 °C11 January 2017	15.8 °C	2,422 mm
2016	25.1 °C10 April 2016	6.0 °C23 December 2016	16.1 °C	2,062 mm
2015	24.7 °C5 March 2015	6.5 °C29 January 2015	16.1 °C	2,236 mm
2014	24.4 °C29 March 2014	5.4 °C16 January 2014	15.7 °C	2,495 mm
2013	25.2 °C1 April 2013	5.8 °C4 March 2013	15.8 °C	2,396 mm
2012	23.5 °C9 June 2012	6.7 °C20 January 2012	15.3 °C	2,490 mm
2011	23.4 °C26 May 2011	5.4 °C3 March 2011	15.5 °C	2,726 mm
2010	24.0 °C12 March 2010	5.4 °C10 December 2010	15.8 °C	3,011 mm
2009	24.6 °C6 April 2009	5.6 °C7 February 2009	15.5 °C	2,119 mm
2008	22.8 °C17 May 2008	5.7 °C4 January 2008	15.1 °C	2,556 mm
2007	24.5 °C3 March 2007	6.2 °C8 November 2007	15.4 °C	2,504 mm
2006	23.5 °C28 April 2006	6.1 °C8 March 2006	15.4 °C	2,362 mm
2005	23.9 °C9 February 2005	6.4 °C18 January 2005	15.5 °C	2,714 mm
2004	22.7 °C7 April 2004	6.5 °C24 January 2004	15.1 °C	2,160 mm
2003	25.2 °C8 March 2003	6.6 °C22 February 2003	15.5 °C	2,371 mm
2002	24.9 °C9 May 2002	5.9 °C11 January 2002	15.4 °C	2,167 mm
2001	23.6 °C13 March 2001	6.3 °C3 December 2001	15.0 °C	2,089 mm
2000	23.2 °C30 March 2000	4.6 °C1 January 2000	15.0 °C	2,083 mm
1999	25.1 °C6 April 1999	3.9 °C1 December 1999	14.8 °C	2,319 mm
1998	25.9 °C15 May 1998	5.2 °C6 February 1998	15.8 °C	2,676 mm
1997	23.1 °C27 October 1997	7.4 °C12 January 1997	15.2 °C	2,470 mm
1996	22.6 °C16 February 1996	4.7 °C6 February 1996	14.9 °C	2,445 mm
1995	22.7 °C15 February 1995	6.6 °C26 November 1995	15.0 °C	3,185 mm
1994	23.9 °C25 March 1994	6.6 °C16 February 1994	14.9 °C	1,838 mm
1993	23.1 °C5 May 1993	6.3 °C9 January 1993	14.9 °C	2,156 mm
1992	23.9 °C19 March 1992	5.8 °C9 February 1992	14.9 °C	2,194 mm
1991	25.4 °C17 March 1991	6.4 °C12 November 1991	14.9 °C	2,083 mm
1990	23.3 °C11 April 1990	6.9 °C24 January 1990	14.7 °C	2,228 mm
1989	23.7 °C9 June 1989	4.2 °C26 February 1989	14.4 °C	2,383 mm
1988	24.7 °C8 May 1988	5.8 °C28 January 1988	15.0 °C	2,163 mm
1987	24.6 °C25 March 1987	3.0 °C28 January 1987	15.1 °C	2,277 mm
1986	25.5 °C13 April 1986	5.6 °C23 March 1986	14.4 °C	1,837 mm
1985	22.9 °C14 May 1985	4.6 °C26 January 1985	14.3 °C	2,100 mm
1984	23.3 °C5 May 1984	5.8 °C1 January 1984	14.4 °C	2,493 mm
1983	24.2 °C9 May 1983	4.2 °C17 March 1983	15.0 °C	2,045 mm
1982	23.9 °C31 March 1982	6.7 °C17 January 1982	14.7 °C	2,090 mm
1981	23.7 °C19 May 1981	5.4 °C26 January 1981	14.6 °C	2,539 mm
1980	23.8 °C11 May 1980	5.2 °C30 December 1980	14.8 °C	2,256 mm
1979	22.8 °C13 April 1979	4.2 °C6 January 1979	14.8 °C	2,380 mm
1978	23.5 °C9 May 1978	5.4 °C10 February 1978	14.7 °C	2,411 mm
1977	24.5 °C15 March 1977	6.1 °C23 December 1977	14.8 °C	1,982 mm
1976	22.9 °C12 March 1976	4.9 °C8 February 1976	14.5 °C	2,173 mm
1975	23.7 °C1 April 1975	4.8 °C2 February 1975	14.4 °C	2,460 mm
1974	23.0 °C12 May 1974	4.6 °C17 February 1974	14.2 °C	2,117 mm
1973	23.4 °C24 January 1973	4.3 °C11 December 1973	14.9 °C	2,393 mm
1972	23.3 °C29 April 1972	4.4 °C20 February 1972	14.6 °C	2,102 mm
1971	23.7 °C1 May 1971	5.8 °C2 February 1971	14.2 °C	2,129 mm
1970	22.8 °C12 March 1970	5.1 °C17 January 1970	14.6 °C	2,299 mm
1969	24.0 °C8 May 1969	5.8 °C21 January 1969	14.9 °C	2,841 mm
1968	21.8 °C5 May 1968	4.5 °C13 November 1968	14.2 °C	2,098 mm
1967	22.9 °C11 May 1967	3.1 °C18 March 1967	14.1 °C	1,918 mm
1966	22.4 °C23 May 1966	5.5 °C30 December 1966	14.2 °C	2,587 mm
1965	22.1 °C5 June 1965	5.0 °C19 January 1965	14.1 °C	2,241 mm
1964	23.0 °C6 May 1964	5.8 °C2 January 1964	14.2 °C	2,275 mm
1963	23.3 °C7 June 1963	4.8 °C25 December 1963	14.3 °C	2,269 mm
1962	21.5 °C11 April 1962	5.3 °C17 February 1962	14.0 °C	2,155 mm
1961	22.4 °C7 March 1961	5.5 °C3 December 1961	13.9 °C	2,419 mm
1960	22.8 °C28 March 1960	4.8 °C11 February 1960	14.0 °C	2,570 mm
1959	22.3 °C22 May 1959	6.8 °C30 November 1959	14.0 °C	2,400 mm
1958	23.8 °C8 April 1958	6.6 °C6 February 1958	14.6 °C	2,588 mm
1957	22.0 °C12 June 1957	5.3 °C6 March 1957	14.1 °C	2,133 mm
1956	22.8 °C18 April 1956	2.1 °C13 January 1956	13.5 °C	2,346 mm
1955	22.7 °C26 April 1955	5.3 °C14 January 1955	13.9 °C	2,547 mm
1954	22.0 °C22 March 1954	4.6 °C1 February 1954	13.9 °C	2,735 mm
1953	23.1 °C19 April 1953	3.4 °C12 January 1953	14.4 °C	2,410 mm
1952	23.2 °C2 April 1952	5.9 °C12 December 1952	14.3 °C	2,311 mm
1951	22.6 °C5 March 1951	4.9 °C25 February 1951	14.5 °C	2,189 mm
1950	21.7 °C30 April 1950	4.9 °C21 December 1950	13.7 °C	2,505 mm
1949	21.5 °C8 March 1949	3.6 °C19 November 1949	13.9 °C	2,426 mm
1948	22.3 °C1 April 1948	5.1 °C15 January 1948	14.0 °C	2,636 mm
1947	21.7 °C21 February 1947	6.6 °C2 December 1947	14.2 °C	2,844 mm
1946	23.1 °C30 March 1946	5.7 °C11 February 1946	14.0 °C	2,040 mm
1945	21.6 °C15 March 1945	3.6 °C8 December 1945	13.9 °C	2,724 mm
1944	22.6 °C16 April 1944	4.9 °C21 January 1944	13.9 °C	2,070 mm
1943	22.0 °C14 April 1943	4.9 °C21 December 1943	13.5 °C	2,245 mm
1942	22.5 °C14 May 1942	5.6 °C18 December 1942	14.0 °C	2,325 mm
1941	24.9 °C20 April 1941	4.8 °C12 January 1941	14.3 °C	2,129 mm
1940	21.9 °C24 February 1940	3.7 °C25 December 1940	14.0 °C	2,036 mm

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

21.0 °C

+1.4 °C

Hot days (≥ 30 °C)

0 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2445 mm

+89 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	20.5 °C	+1.8 °C	31 mm	+3 mm
Feb	20.5 °C	+0.9 °C	55 mm	+23 mm
Mar	22.2 °C	+1.8 °C	49 mm	-19 mm
Apr	21.1 °C	+0.4 °C	165 mm	+29 mm
May	22.4 °C	+1.9 °C	235 mm	-59 mm
Jun	21.2 °C	+1.6 °C	532 mm	+124 mm
Jul	21.3 °C	+1.8 °C	184 mm	-94 mm
Aug	21.2 °C	+1.6 °C	293 mm	-20 mm
Sep	21.2 °C	+1.8 °C	461 mm	+59 mm
Oct	21.0 °C	+1.9 °C	271 mm	-1 mm
Nov	19.7 °C	+0.8 °C	80 mm	-9 mm
Dec	19.4 °C	+0.8 °C	90 mm	+52 mm

The year's extremes

Hottest day

24.3 °C

21 May 2025

Coldest day

7.0 °C

17 Jan 2025

Wettest day

39.1 mm

17 Sep 2025

Windiest day

13.6 km/h

22 Jan 2025

Strongest gust

56.2 km/h

10 Nov 2025

Hottest feels-like

27.2 °C

14 Aug 2025

Coldest feels-like

5.0 °C

17 Jan 2025

Sunniest day

12.5 h

20 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 San Marcos?

San Marcos has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 14.8 °C and it receives 2,356 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 6 May 2024, reaching 27.2 °C.

What is the coldest day in San Marcos?

The coldest day measured in San Marcos between 1940 and 2025 was 13 January 1956, at 2.1 °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 +2.3 °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 13 May 1997, with 163 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 2 February 1998, with winds reaching 22.4 km/h.

What is the warmest month in San Marcos?

The warmest month in San Marcos is May (15.8 °C on average); the coldest is January (13.4 °C).

How much does it rain in San Marcos?

San Marcos receives on average 2,356 mm of precipitation per year, spread over about 272 rainy days.

Is it sunny in San Marcos?

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

Are there tropical nights in San Marcos?

Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in San Marcos.

What was the most extreme apparent temperature in San Marcos?

In San Marcos, between 1940 and 2025, the highest apparent temperature reached 29.1 °C on 6 May 2024, and the lowest was -1.3 °C on 13 January 1956.

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