Santa Rosa climate — normals and trends

Q: What is the climate of Santa Rosa?

Santa Rosa has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,773 mm of precipitation per year.

Q: What is the hottest day ever recorded in Santa Rosa?

The hottest day measured in Santa Rosa between 1940 and 2025 was 11 November 2023, reaching 44.5 °C.

Q: What is the coldest day in Santa Rosa?

The coldest day measured in Santa Rosa between 1940 and 2025 was 23 July 2013, at -2.5 °C.

Q: Does it snow in Santa Rosa?

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

Q: Has the climate of Santa Rosa warmed?

Yes: Santa Rosa warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Santa Rosa?

The wettest day measured in Santa Rosa between 1940 and 2025 was 30 November 2024, with 202 mm of rain in 24 hours.

Q: What was the windiest day in Santa Rosa?

The windiest day measured in Santa Rosa between 1940 and 2025 was 10 September 1940, with winds reaching 31.9 km/h.

Q: What is the warmest month in Santa Rosa?

The warmest month in Santa Rosa is January (25.2 °C on average); the coldest is July (14.4 °C).

Q: How much does it rain in Santa Rosa?

Santa Rosa receives on average 1,773 mm of precipitation per year, spread over about 160 rainy days.

Q: Is it sunny in Santa Rosa?

Santa Rosa gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.

Santa Rosa (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.7 °C and it receives 1,773 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 (25.2 °C on average) and the coldest is July (14.4 °C). Rainfall peaks in March.

Santa Rosa averages 0 frost days, 93 hot days (≥ 30 °C) and 160 rainy days per year.

Santa Rosa 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 44.5 °C (on 11 November 2023) and the coldest -2.5 °C (on 23 July 2013).

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

Santa RosaSalta

coords: -23.39°, -64.43°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthMarchDriest monthAugust

Mean daily temperature

20.7°C

Average daily high

25.9°C

Average daily low

16.2°C

Annual rainfall

1,773mm

Sunshine / day

8.6h

Mean relative humidity

75%

Average peak wind

10.3km/h

Seasonal range

10.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

93 d/yr

Rainy days (≥ 1 mm)

160 d/yr

Annual snowfall

0.0 cm

Average feels-like high

28.0 °C

Average feels-like low

17.0 °C

Average peak gust

27.1 km/h

Tropical nights (≥ 20 °C)

106 d/yr

Solar radiation

15.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.3 °C

since 1940

+0.3 °C per decade · r² = 0.64 · 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

44.5 °C

11 November 2023

Coldest day

-2.5 °C

23 July 2013

Wettest day

202 mm

30 November 2024

Windiest day

31.9 km/h

10 September 1940

Strongest gust

65.9 km/h

12 November 2003

Hottest feels-like

47.6 °C

3 November 2004

Coldest feels-like

-5.8 °C

6 July 1989

Sunniest day

13.3 h

14 December 2010

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	41.4 °C5 October 2025	1.2 °C24 June 2025	22.0 °C	1,074 mm	141	0
2024	42.4 °C16 January 2024	1.6 °C14 July 2024	22.4 °C	1,338 mm	170	0
2023	44.5 °C11 November 2023	1.4 °C15 June 2023	23.4 °C	860 mm	178	0
2022	44.1 °C8 December 2022	1.3 °C14 June 2022	21.9 °C	928 mm	151	0
2021	40.3 °C30 December 2021	-2.0 °C29 June 2021	21.6 °C	1,140 mm	138	1
2020	42.0 °C26 September 2020	-0.7 °C25 July 2020	22.2 °C	958 mm	166	1
2019	44.0 °C28 October 2019	0.8 °C26 July 2019	21.4 °C	1,491 mm	126	0
2018	40.4 °C23 September 2018	2.6 °C21 July 2018	21.1 °C	1,644 mm	105	0
2017	40.1 °C1 January 2017	1.3 °C18 July 2017	21.8 °C	1,451 mm	135	0
2016	40.6 °C1 November 2016	3.7 °C6 July 2016	20.9 °C	1,529 mm	123	0
2015	38.9 °C30 December 2015	4.6 °C18 August 2015	21.7 °C	1,468 mm	125	0
2014	42.8 °C16 October 2014	1.5 °C26 July 2014	21.7 °C	1,367 mm	119	0
2013	42.4 °C15 November 2013	-2.5 °C23 July 2013	22.2 °C	681 mm	162	2
2012	42.1 °C15 October 2012	1.0 °C8 July 2012	22.1 °C	1,166 mm	152	0
2011	42.0 °C9 November 2011	0.4 °C2 July 2011	21.1 °C	1,314 mm	118	0
2010	42.9 °C29 October 2010	-2.3 °C19 July 2010	21.1 °C	1,131 mm	128	2
2009	43.4 °C31 October 2009	0.9 °C24 July 2009	21.6 °C	1,350 mm	135	0
2008	41.5 °C23 November 2008	3.1 °C7 September 2008	21.1 °C	1,374 mm	112	0
2007	40.7 °C18 November 2007	-1.5 °C12 July 2007	20.7 °C	1,411 mm	110	2
2006	40.7 °C14 October 2006	3.6 °C2 August 2006	21.4 °C	1,906 mm	110	0
2005	39.8 °C29 November 2005	1.8 °C17 July 2005	21.0 °C	1,620 mm	128	0
2004	42.1 °C3 November 2004	1.8 °C12 June 2004	21.0 °C	1,277 mm	127	0
2003	41.8 °C17 November 2003	3.0 °C12 July 2003	21.4 °C	1,361 mm	128	0
2002	40.5 °C15 October 2002	3.5 °C2 August 2002	21.3 °C	1,613 mm	120	0
2001	37.4 °C23 November 2001	0.3 °C20 June 2001	20.8 °C	1,534 mm	114	0
2000	39.5 °C12 February 2000	-1.1 °C13 July 2000	20.5 °C	1,687 mm	105	2
1999	40.9 °C21 December 1999	-0.6 °C16 August 1999	20.2 °C	1,469 mm	100	1
1998	42.1 °C28 December 1998	5.7 °C26 July 1998	20.8 °C	1,390 mm	88	0
1997	41.8 °C11 October 1997	4.7 °C21 July 1997	21.7 °C	1,571 mm	126	0
1996	41.0 °C3 January 1996	0.9 °C29 June 1996	20.8 °C	1,564 mm	111	0
1995	41.5 °C6 November 1995	2.7 °C21 July 1995	21.1 °C	1,504 mm	107	0
1994	39.2 °C19 September 1994	-0.3 °C26 June 1994	21.1 °C	1,491 mm	109	1
1993	38.8 °C11 November 1993	-0.6 °C31 July 1993	20.2 °C	1,427 mm	111	1
1992	38.9 °C2 November 1992	0.9 °C7 July 1992	20.0 °C	1,803 mm	70	0
1991	38.6 °C13 October 1991	2.2 °C23 July 1991	20.3 °C	2,375 mm	65	0
1990	38.9 °C11 October 1990	0.7 °C21 June 1990	20.7 °C	1,930 mm	99	0
1989	39.2 °C19 November 1989	-2.1 °C6 July 1989	21.3 °C	1,292 mm	139	2
1988	41.6 °C12 December 1988	-0.7 °C13 July 1988	20.5 °C	1,423 mm	115	1
1987	41.6 °C11 October 1987	1.1 °C16 June 1987	20.6 °C	1,716 mm	103	0
1986	38.8 °C27 November 1986	4.3 °C1 June 1986	21.0 °C	1,705 mm	99	0
1985	36.7 °C17 November 1985	0.3 °C7 July 1985	20.5 °C	2,496 mm	77	0
1984	36.3 °C29 October 1984	1.5 °C25 August 1984	19.8 °C	2,350 mm	68	0
1983	39.3 °C8 October 1983	1.5 °C4 June 1983	20.2 °C	1,633 mm	106	0
1982	38.1 °C22 October 1982	4.5 °C30 July 1982	20.4 °C	2,224 mm	71	0
1981	38.0 °C30 October 1981	1.8 °C19 July 1981	20.5 °C	2,042 mm	78	0
1980	38.2 °C20 October 1980	2.2 °C31 July 1980	20.8 °C	1,404 mm	112	0
1979	37.2 °C26 September 1979	2.4 °C31 May 1979	20.3 °C	2,342 mm	92	0
1978	39.9 °C24 October 1978	0.1 °C15 August 1978	21.3 °C	1,365 mm	120	0
1977	42.6 °C1 November 1977	2.1 °C25 June 1977	20.9 °C	1,769 mm	98	0
1976	39.3 °C28 September 1976	-0.3 °C11 July 1976	20.1 °C	1,705 mm	98	1
1975	41.3 °C26 October 1975	-1.3 °C18 July 1975	20.6 °C	1,691 mm	107	1
1974	40.3 °C18 November 1974	2.8 °C26 July 1974	20.1 °C	1,851 mm	85	0
1973	39.3 °C21 October 1973	1.0 °C24 July 1973	20.3 °C	2,295 mm	91	0
1972	42.1 °C28 November 1972	2.1 °C10 July 1972	21.0 °C	1,585 mm	105	0
1971	39.9 °C28 December 1971	2.3 °C2 July 1971	20.0 °C	2,035 mm	93	0
1970	43.2 °C26 November 1970	-0.2 °C2 July 1970	20.4 °C	1,907 mm	96	1
1969	39.1 °C26 October 1969	-2.2 °C10 July 1969	21.0 °C	1,409 mm	120	2
1968	39.1 °C23 October 1968	2.9 °C16 May 1968	20.3 °C	2,270 mm	79	0
1967	37.5 °C27 October 1967	1.1 °C16 June 1967	20.4 °C	1,846 mm	90	0
1966	39.9 °C11 October 1966	-0.4 °C5 August 1966	20.2 °C	1,713 mm	90	1
1965	40.1 °C4 December 1965	0.4 °C17 July 1965	20.8 °C	1,150 mm	105	0
1964	36.5 °C26 January 1964	2.6 °C1 July 1964	20.1 °C	1,585 mm	82	0
1963	37.8 °C31 October 1963	2.9 °C5 August 1963	20.5 °C	1,587 mm	95	0
1962	39.6 °C3 November 1962	1.3 °C24 June 1962	19.7 °C	1,622 mm	97	0
1961	38.3 °C25 October 1961	-0.7 °C15 June 1961	20.9 °C	1,956 mm	94	1
1960	38.5 °C1 October 1960	1.0 °C10 July 1960	20.0 °C	1,886 mm	80	0
1959	36.2 °C8 September 1959	3.8 °C22 May 1959	19.8 °C	2,714 mm	51	0
1958	34.0 °C8 November 1958	2.5 °C10 August 1958	19.7 °C	2,022 mm	55	0
1957	37.0 °C15 October 1957	-0.1 °C20 July 1957	19.4 °C	2,320 mm	47	1
1956	31.0 °C3 January 1956	3.9 °C21 September 1956	18.7 °C	2,779 mm	7	0
1955	31.8 °C29 November 1955	1.7 °C31 July 1955	19.0 °C	2,802 mm	9	0
1954	32.8 °C2 December 1954	4.8 °C5 August 1954	19.1 °C	2,670 mm	17	0
1953	33.1 °C5 January 1953	1.1 °C24 July 1953	20.2 °C	2,749 mm	15	0
1952	33.5 °C23 December 1952	1.6 °C20 June 1952	19.7 °C	1,983 mm	27	0
1951	33.5 °C24 September 1951	5.2 °C28 June 1951	20.1 °C	3,325 mm	18	0
1950	31.6 °C12 December 1950	1.4 °C4 August 1950	19.5 °C	2,610 mm	8	0
1949	33.4 °C25 February 1949	0.6 °C11 August 1949	19.1 °C	2,268 mm	24	0
1948	35.0 °C22 September 1948	5.7 °C9 August 1948	19.9 °C	2,380 mm	28	0
1947	32.4 °C30 January 1947	1.4 °C14 July 1947	19.3 °C	3,204 mm	14	0
1946	33.5 °C15 November 1946	3.7 °C20 July 1946	19.8 °C	3,193 mm	25	0
1945	34.8 °C15 January 1945	3.4 °C26 June 1945	20.4 °C	1,855 mm	45	0
1944	33.0 °C20 February 1944	1.7 °C9 July 1944	20.5 °C	1,623 mm	39	0
1943	40.4 °C17 January 1943	4.4 °C3 August 1943	20.8 °C	995 mm	89	0
1942	37.9 °C29 December 1942	1.9 °C12 July 1942	19.6 °C	1,296 mm	89	0
1941	35.2 °C11 December 1941	3.4 °C31 May 1941	19.7 °C	1,791 mm	43	0
1940	32.6 °C12 January 1940	5.4 °C16 June 1940	19.3 °C	2,871 mm	18	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

27.8 °C

+1.9 °C

Hot days (≥ 30 °C)

141 d/yr

+48

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1074 mm

-699 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	33.2 °C	+2.9 °C	186 mm	-80 mm
Feb	34.9 °C	+5.7 °C	169 mm	-88 mm
Mar	27.7 °C	+0.4 °C	244 mm	-44 mm
Apr	23.8 °C	-0.4 °C	85 mm	-105 mm
May	23.4 °C	+1.9 °C	58 mm	-35 mm
Jun	19.0 °C	-0.5 °C	25 mm	-23 mm
Jul	21.0 °C	+0.7 °C	29 mm	-7 mm
Aug	24.9 °C	+1.2 °C	14 mm	-17 mm
Sep	30.0 °C	+3.6 °C	10 mm	-34 mm
Oct	30.8 °C	+2.2 °C	61 mm	-48 mm
Nov	33.1 °C	+3.5 °C	36 mm	-128 mm
Dec	33.0 °C	+2.8 °C	158 mm	-90 mm

The year's extremes

Hottest day

41.4 °C

5 Oct 2025

Coldest day

1.2 °C

24 Jun 2025

Wettest day

112.0 mm

18 Feb 2025

Windiest day

31.4 km/h

21 Nov 2025

Strongest gust

63.7 km/h

21 Nov 2025

Hottest feels-like

44.8 °C

27 Nov 2025

Coldest feels-like

-1.9 °C

4 Jul 2025

Sunniest day

13.3 h

13 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 Santa Rosa?

Santa Rosa has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,773 mm of precipitation per year.

What is the hottest day ever recorded in Santa Rosa?

The hottest day measured in Santa Rosa between 1940 and 2025 was 11 November 2023, reaching 44.5 °C.

What is the coldest day in Santa Rosa?

The coldest day measured in Santa Rosa between 1940 and 2025 was 23 July 2013, at -2.5 °C.

Does it snow in Santa Rosa?

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

Has the climate of Santa Rosa warmed?

Yes: Santa Rosa warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Santa Rosa?

The wettest day measured in Santa Rosa between 1940 and 2025 was 30 November 2024, with 202 mm of rain in 24 hours.

What was the windiest day in Santa Rosa?

The windiest day measured in Santa Rosa between 1940 and 2025 was 10 September 1940, with winds reaching 31.9 km/h.

What is the warmest month in Santa Rosa?

The warmest month in Santa Rosa is January (25.2 °C on average); the coldest is July (14.4 °C).

How much does it rain in Santa Rosa?

Santa Rosa receives on average 1,773 mm of precipitation per year, spread over about 160 rainy days.

Is it sunny in Santa Rosa?

Santa Rosa gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.

Are there tropical nights in Santa Rosa?

Yes: Santa Rosa has on average 106 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Santa Rosa?

In Santa Rosa, between 1940 and 2025, the highest apparent temperature reached 47.6 °C on 3 November 2004, and the lowest was -5.8 °C on 6 July 1989.

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