San Lorenzo climate — normals and trends

Q: What is the climate of San Lorenzo?

San Lorenzo has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.8 °C and it receives 1,487 mm of precipitation per year.

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

The hottest day measured in San Lorenzo between 1940 and 2025 was 30 September 2020, reaching 43.0 °C.

Q: What is the coldest day in San Lorenzo?

The coldest day measured in San Lorenzo between 1940 and 2025 was 2 August 1991, at -2.7 °C.

Q: Does it snow in San Lorenzo?

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

Q: Has the climate of San Lorenzo warmed?

Yes: San Lorenzo warmed by +0.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in San Lorenzo?

The wettest day measured in San Lorenzo between 1940 and 2025 was 12 November 1993, with 177 mm of rain in 24 hours.

Q: What was the windiest day in San Lorenzo?

The windiest day measured in San Lorenzo between 1940 and 2025 was 17 October 1982, with winds reaching 56.5 km/h.

Q: What is the warmest month in San Lorenzo?

The warmest month in San Lorenzo is January (26.7 °C on average); the coldest is July (14.9 °C).

Q: How much does it rain in San Lorenzo?

San Lorenzo receives on average 1,487 mm of precipitation per year, spread over about 111 rainy days.

Q: Is it sunny in San Lorenzo?

San Lorenzo gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

San Lorenzo (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.8 °C and it receives 1,487 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 January (26.7 °C on average) and the coldest is July (14.9 °C). Rainfall peaks in October.

San Lorenzo averages 0 frost days, 103 hot days (≥ 30 °C) and 111 rainy days per year.

San Lorenzo has warmed by +0.4 °C between 1940 and 2025, or +0.05 °C per decade. This trend is statistically significant.

The hottest day of the period reached 43.0 °C (on 30 September 2020) and the coldest -2.7 °C (on 2 August 1991).

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 LorenzoCorrientes

coords: -28.13°, -58.77°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthOctoberDriest monthJuly

Mean daily temperature

20.8°C

Average daily high

26.0°C

Average daily low

16.2°C

Annual rainfall

1,487mm

Sunshine / day

9.4h

Mean relative humidity

73%

Average peak wind

19.0km/h

Seasonal range

11.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

103 d/yr

Rainy days (≥ 1 mm)

111 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.3 °C

Average feels-like low

15.8 °C

Average peak gust

34.8 km/h

Tropical nights (≥ 20 °C)

105 d/yr

Solar radiation

17.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.4 °C

since 1940

+0.1 °C per decade · r² = 0.05 · p = 0.047

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

43.0 °C

30 September 2020

Coldest day

-2.7 °C

2 August 1991

Wettest day

177 mm

12 November 1993

Windiest day

56.5 km/h

17 October 1982

Strongest gust

93.6 km/h

17 October 1982

Hottest feels-like

45.3 °C

21 January 1961

Coldest feels-like

-6.4 °C

2 August 1991

Sunniest day

13.8 h

17 December 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	41.4 °C3 March 2025	-1.5 °C1 July 2025	21.2 °C	1,278 mm	122	2
2024	39.7 °C3 February 2024	-2.0 °C10 July 2024	21.6 °C	1,264 mm	134	2
2023	39.6 °C1 January 2023	2.3 °C19 July 2023	22.2 °C	1,260 mm	137	0
2022	42.7 °C13 January 2022	0.7 °C11 June 2022	21.2 °C	776 mm	134	0
2021	39.0 °C11 January 2021	-0.4 °C29 July 2021	21.0 °C	1,055 mm	137	3
2020	43.0 °C30 September 2020	-0.8 °C21 August 2020	21.9 °C	783 mm	181	3
2019	39.4 °C12 October 2019	-0.8 °C6 July 2019	21.3 °C	1,407 mm	102	1
2018	38.8 °C11 December 2018	1.0 °C16 June 2018	21.2 °C	1,161 mm	129	0
2017	39.7 °C16 December 2017	0.9 °C19 July 2017	21.5 °C	1,674 mm	121	0
2016	37.5 °C26 November 2016	0.6 °C11 June 2016	20.5 °C	1,583 mm	105	0
2015	36.2 °C31 August 2015	2.1 °C19 June 2015	21.5 °C	1,822 mm	103	0
2014	38.7 °C16 October 2014	2.2 °C25 July 2014	21.5 °C	1,830 mm	106	0
2013	38.8 °C25 December 2013	-1.5 °C27 August 2013	20.6 °C	1,490 mm	105	1
2012	38.2 °C9 January 2012	-2.2 °C8 June 2012	21.6 °C	1,280 mm	142	2
2011	40.1 °C21 December 2011	-0.3 °C5 July 2011	20.6 °C	1,402 mm	98	1
2010	37.9 °C3 February 2010	1.5 °C5 August 2010	20.3 °C	1,406 mm	111	0
2009	40.0 °C2 November 2009	-0.5 °C24 July 2009	21.0 °C	1,380 mm	137	1
2008	39.3 °C8 December 2008	-0.1 °C30 May 2008	20.8 °C	1,239 mm	116	1
2007	37.9 °C23 December 2007	-0.7 °C11 July 2007	20.3 °C	1,458 mm	122	3
2006	39.7 °C15 January 2006	0.4 °C31 July 2006	21.6 °C	1,132 mm	135	0
2005	38.8 °C14 January 2005	2.1 °C19 July 2005	21.0 °C	1,433 mm	127	0
2004	38.5 °C31 January 2004	0.8 °C11 July 2004	20.9 °C	941 mm	125	0
2003	39.0 °C18 October 2003	0.8 °C10 July 2003	20.8 °C	1,461 mm	104	0
2002	36.5 °C10 January 2002	0.7 °C2 September 2002	21.0 °C	2,189 mm	106	0
2001	36.8 °C11 February 2001	-0.9 °C28 July 2001	21.1 °C	1,754 mm	111	1
2000	37.4 °C8 January 2000	-0.9 °C17 July 2000	20.1 °C	1,897 mm	96	1
1999	37.5 °C30 November 1999	0.2 °C15 August 1999	20.4 °C	1,419 mm	117	0
1998	38.2 °C21 January 1998	2.6 °C21 September 1998	20.2 °C	2,155 mm	66	0
1997	36.3 °C7 January 1997	2.4 °C28 June 1997	21.4 °C	1,638 mm	111	0
1996	38.1 °C10 January 1996	-1.1 °C29 June 1996	20.3 °C	1,909 mm	93	2
1995	38.2 °C6 November 1995	-0.8 °C5 August 1995	20.6 °C	1,376 mm	105	1
1994	38.3 °C20 January 1994	-2.5 °C10 July 1994	21.1 °C	1,734 mm	107	1
1993	36.2 °C3 December 1993	0.8 °C14 July 1993	20.3 °C	2,225 mm	102	0
1992	38.1 °C8 February 1992	0.9 °C23 July 1992	20.2 °C	1,642 mm	94	0
1991	38.1 °C20 January 1991	-2.7 °C2 August 1991	20.7 °C	1,686 mm	100	2
1990	37.0 °C12 March 1990	-0.2 °C28 July 1990	20.4 °C	1,839 mm	95	2
1989	38.4 °C18 January 1989	-0.8 °C3 July 1989	20.4 °C	1,462 mm	102	1
1988	37.9 °C11 November 1988	-0.5 °C1 June 1988	20.1 °C	1,198 mm	123	1
1987	38.1 °C1 December 1987	1.1 °C24 June 1987	20.3 °C	1,574 mm	95	0
1986	40.0 °C27 January 1986	4.1 °C18 August 1986	21.5 °C	2,222 mm	105	0
1985	40.5 °C15 November 1985	2.0 °C12 July 1985	21.3 °C	1,451 mm	116	0
1984	39.1 °C7 January 1984	0.3 °C25 August 1984	20.5 °C	1,747 mm	94	0
1983	38.3 °C30 December 1983	1.8 °C9 September 1983	20.4 °C	1,402 mm	109	0
1982	37.9 °C16 January 1982	1.5 °C29 June 1982	21.1 °C	1,684 mm	103	0
1981	36.8 °C24 October 1981	0.5 °C18 June 1981	20.8 °C	1,349 mm	106	0
1980	37.1 °C9 February 1980	-1.3 °C31 July 1980	20.8 °C	1,637 mm	122	2
1979	38.9 °C16 January 1979	0.6 °C15 June 1979	20.3 °C	1,436 mm	89	0
1978	37.2 °C23 December 1978	0.3 °C9 June 1978	20.6 °C	1,310 mm	110	0
1977	36.7 °C31 October 1977	1.6 °C23 June 1977	20.9 °C	1,492 mm	106	0
1976	37.5 °C14 December 1976	-1.7 °C10 July 1976	19.8 °C	1,229 mm	88	1
1975	38.5 °C14 February 1975	0.7 °C18 July 1975	20.2 °C	1,474 mm	82	0
1974	37.6 °C18 November 1974	1.0 °C13 June 1974	20.2 °C	1,277 mm	92	0
1973	36.8 °C12 December 1973	2.2 °C18 July 1973	20.1 °C	1,963 mm	91	0
1972	38.0 °C6 March 1972	0.9 °C4 August 1972	20.4 °C	1,838 mm	85	0
1971	39.1 °C10 December 1971	0.2 °C12 June 1971	20.1 °C	1,442 mm	99	0
1970	38.3 °C7 January 1970	-0.4 °C2 July 1970	20.8 °C	1,817 mm	120	1
1969	37.4 °C7 February 1969	-0.1 °C19 June 1969	20.5 °C	1,896 mm	99	1
1968	40.7 °C12 December 1968	3.1 °C6 July 1968	20.7 °C	1,537 mm	112	0
1967	38.1 °C29 December 1967	0.2 °C14 June 1967	20.7 °C	1,834 mm	102	0
1966	36.0 °C8 December 1966	0.3 °C5 August 1966	20.2 °C	1,429 mm	78	0
1965	37.0 °C19 February 1965	0.5 °C11 July 1965	20.5 °C	1,228 mm	90	0
1964	38.5 °C26 January 1964	1.2 °C29 June 1964	19.9 °C	999 mm	101	0
1963	40.0 °C4 January 1963	0.8 °C6 August 1963	21.2 °C	1,420 mm	109	0
1962	39.1 °C28 November 1962	0.7 °C17 July 1962	19.7 °C	1,046 mm	107	0
1961	39.4 °C17 January 1961	0.1 °C16 June 1961	21.1 °C	1,475 mm	105	0
1960	37.3 °C24 December 1960	1.1 °C9 July 1960	20.5 °C	968 mm	112	0
1959	35.9 °C25 January 1959	3.7 °C12 June 1959	20.3 °C	2,283 mm	76	0
1958	39.7 °C13 February 1958	2.6 °C29 August 1958	20.5 °C	1,448 mm	82	0
1957	35.3 °C2 April 1957	0.9 °C2 August 1957	20.6 °C	1,493 mm	104	0
1956	34.4 °C27 December 1956	1.9 °C11 June 1956	19.6 °C	1,805 mm	44	0
1955	36.3 °C28 November 1955	1.0 °C8 July 1955	20.2 °C	1,480 mm	81	0
1954	34.6 °C1 December 1954	5.1 °C21 August 1954	20.4 °C	1,605 mm	69	0
1953	38.4 °C5 January 1953	2.8 °C20 July 1953	21.4 °C	1,513 mm	81	0
1952	37.5 °C27 December 1952	3.6 °C19 June 1952	20.9 °C	1,234 mm	87	0
1951	34.4 °C14 January 1951	5.1 °C29 June 1951	21.0 °C	1,490 mm	52	0
1950	38.3 °C12 December 1950	2.0 °C11 July 1950	20.7 °C	1,184 mm	87	0
1949	37.2 °C21 December 1949	3.6 °C17 July 1949	20.6 °C	1,383 mm	94	0
1948	34.5 °C12 December 1948	4.0 °C8 August 1948	20.7 °C	1,623 mm	54	0
1947	35.3 °C23 January 1947	1.1 °C10 July 1947	20.8 °C	1,296 mm	75	0
1946	37.0 °C25 January 1946	2.4 °C21 July 1946	20.6 °C	1,645 mm	65	0
1945	39.8 °C15 January 1945	1.1 °C24 June 1945	21.9 °C	1,090 mm	120	0
1944	38.3 °C20 December 1944	1.8 °C27 June 1944	22.1 °C	1,453 mm	111	0
1943	40.7 °C17 January 1943	4.2 °C23 August 1943	22.4 °C	840 mm	137	0
1942	39.5 °C29 December 1942	1.1 °C5 July 1942	21.1 °C	1,022 mm	119	0
1941	35.0 °C17 February 1941	3.0 °C25 June 1941	20.7 °C	1,652 mm	74	0
1940	35.3 °C28 November 1940	4.3 °C27 August 1940	20.6 °C	1,498 mm	86	0

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

26.9 °C

+0.9 °C

Hot days (≥ 30 °C)

122 d/yr

+19

Frost days (< 0 °C)

2 d/yr

Annual rainfall

1278 mm

-210 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	34.6 °C	+2.6 °C	26 mm	-124 mm
Feb	36.8 °C	+5.8 °C	61 mm	-77 mm
Mar	33.0 °C	+3.7 °C	110 mm	-36 mm
Apr	25.5 °C	-0.2 °C	42 mm	-113 mm
May	23.9 °C	+1.5 °C	274 mm	+168 mm
Jun	17.4 °C	-2.6 °C	99 mm	+16 mm
Jul	21.4 °C	+1.3 °C	62 mm	-4 mm
Aug	22.2 °C	+0.2 °C	65 mm	-10 mm
Sep	23.7 °C	-0.2 °C	155 mm	+36 mm
Oct	26.4 °C	+0.1 °C	113 mm	-55 mm
Nov	28.1 °C	-0.6 °C	97 mm	-50 mm
Dec	30.5 °C	-0.6 °C	175 mm	+40 mm

The year's extremes

Hottest day

41.4 °C

3 Mar 2025

Coldest day

-1.5 °C

1 Jul 2025

Wettest day

79.0 mm

8 May 2025

Windiest day

39.8 km/h

31 Aug 2025

Strongest gust

72.0 km/h

21 Sep 2025

Hottest feels-like

44.3 °C

4 Feb 2025

Coldest feels-like

-5.2 °C

1 Jul 2025

Sunniest day

13.8 h

18 Dec 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 Lorenzo?

San Lorenzo has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.8 °C and it receives 1,487 mm of precipitation per year.

What is the hottest day ever recorded in San Lorenzo?

The hottest day measured in San Lorenzo between 1940 and 2025 was 30 September 2020, reaching 43.0 °C.

What is the coldest day in San Lorenzo?

The coldest day measured in San Lorenzo between 1940 and 2025 was 2 August 1991, at -2.7 °C.

Does it snow in San Lorenzo?

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

Has the climate of San Lorenzo warmed?

Yes: San Lorenzo warmed by +0.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in San Lorenzo?

The wettest day measured in San Lorenzo between 1940 and 2025 was 12 November 1993, with 177 mm of rain in 24 hours.

What was the windiest day in San Lorenzo?

The windiest day measured in San Lorenzo between 1940 and 2025 was 17 October 1982, with winds reaching 56.5 km/h.

What is the warmest month in San Lorenzo?

The warmest month in San Lorenzo is January (26.7 °C on average); the coldest is July (14.9 °C).

How much does it rain in San Lorenzo?

San Lorenzo receives on average 1,487 mm of precipitation per year, spread over about 111 rainy days.

Is it sunny in San Lorenzo?

San Lorenzo gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

Are there tropical nights in San Lorenzo?

Yes: San Lorenzo has on average 105 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in San Lorenzo?

In San Lorenzo, between 1940 and 2025, the highest apparent temperature reached 45.3 °C on 21 January 1961, and the lowest was -6.4 °C on 2 August 1991.

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