Bahía Blanca climate — normals and trends

Q: What is the climate of Bahía Blanca?

Bahía Blanca has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.6 °C and it receives 579 mm of precipitation per year.

Q: What is the hottest day ever recorded in Bahía Blanca?

The hottest day measured in Bahía Blanca between 1940 and 2025 was 13 January 2022, reaching 39.1 °C.

Q: What is the coldest day in Bahía Blanca?

The coldest day measured in Bahía Blanca between 1940 and 2025 was 4 July 1988, at -4.6 °C.

Q: Does it snow in Bahía Blanca?

Almost never: Bahía Blanca sees virtually no snow, with about 3 frost days per year.

Q: Has the climate of Bahía Blanca warmed?

Between 1940 and 2025, no statistically significant temperature trend emerges in Bahía Blanca.

Q: What is the wettest day in Bahía Blanca?

The wettest day measured in Bahía Blanca between 1940 and 2025 was 3 March 1987, with 132 mm of rain in 24 hours.

Q: What was the windiest day in Bahía Blanca?

The windiest day measured in Bahía Blanca between 1940 and 2025 was 20 April 1976, with winds reaching 70.3 km/h.

Q: What is the warmest month in Bahía Blanca?

The warmest month in Bahía Blanca is January (23.2 °C on average); the coldest is July (8.3 °C).

Q: How much does it rain in Bahía Blanca?

Bahía Blanca receives on average 579 mm of precipitation per year, spread over about 76 rainy days.

Q: Is it sunny in Bahía Blanca?

Bahía Blanca gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

Bahía Blanca (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.6 °C and it receives 579 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 (23.2 °C on average) and the coldest is July (8.3 °C). Rainfall peaks in March.

Bahía Blanca averages 3 frost days, 25 hot days (≥ 30 °C) and 76 rainy days per year.

No statistically significant temperature trend emerges for Bahía Blanca between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.

The hottest day of the period reached 39.1 °C (on 13 January 2022) and the coldest -4.6 °C (on 4 July 1988).

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

Bahía BlancaBuenos Aires

coords: -38.72°, -62.27°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthMarchDriest monthJune

Mean daily temperature

15.6°C

Average daily high

19.9°C

Average daily low

11.7°C

Annual rainfall

579mm

Sunshine / day

10.0h

Mean relative humidity

65%

Average peak wind

26.4km/h

Seasonal range

14.9°C

Frost days (< 0 °C)

3 d/yr

Hot days (≥ 30 °C)

25 d/yr

Rainy days (≥ 1 mm)

76 d/yr

Annual snowfall

0.1 cm

Average feels-like high

17.8 °C

Average feels-like low

8.5 °C

Average peak gust

41.0 km/h

Tropical nights (≥ 20 °C)

25 d/yr

Solar radiation

17.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

No clear trend over this period

Over a short window, year-to-year swings outweigh the climate signal. Try 86 years.

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

39.1 °C

13 January 2022

Coldest day

-4.6 °C

4 July 1988

Wettest day

132 mm

3 March 1987

Windiest day

70.3 km/h

20 April 1976

Strongest gust

104.8 km/h

24 March 2022

Hottest feels-like

39.6 °C

22 December 2013

Coldest feels-like

-9.7 °C

9 July 2007

Snowiest day

4.9 cm

22 July 2009

Sunniest day

14.4 h

9 January 1941

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.3 °C22 February 2025	-1.9 °C1 July 2025	16.0 °C	620 mm	38	3
2024	37.2 °C31 January 2024	-1.4 °C8 July 2024	16.1 °C	427 mm	32	5
2023	35.7 °C3 March 2023	-1.2 °C17 July 2023	16.1 °C	507 mm	39	2
2022	39.1 °C13 January 2022	-1.8 °C1 June 2022	15.5 °C	655 mm	37	3
2021	35.8 °C29 December 2021	0.4 °C1 August 2021	16.4 °C	407 mm	37	0
2020	34.8 °C1 February 2020	-1.1 °C14 July 2020	15.8 °C	611 mm	34	1
2019	33.9 °C18 February 2019	-1.5 °C5 July 2019	15.7 °C	392 mm	25	2
2018	35.8 °C8 January 2018	-0.5 °C3 July 2018	15.9 °C	529 mm	41	4
2017	34.8 °C19 January 2017	0.0 °C17 July 2017	15.9 °C	792 mm	27	0
2016	34.9 °C20 December 2016	-1.0 °C17 July 2016	15.3 °C	597 mm	27	1
2015	35.8 °C28 December 2015	-1.8 °C23 June 2015	15.7 °C	494 mm	24	3
2014	35.7 °C17 January 2014	-0.5 °C26 July 2014	15.7 °C	722 mm	29	2
2013	36.0 °C22 December 2013	-1.9 °C25 August 2013	15.8 °C	466 mm	39	6
2012	36.7 °C9 January 2012	-1.9 °C6 July 2012	15.8 °C	585 mm	26	3
2011	34.1 °C29 December 2011	-1.3 °C4 August 2011	15.6 °C	613 mm	26	4
2010	35.5 °C28 January 2010	-2.5 °C2 August 2010	15.5 °C	419 mm	28	7
2009	35.9 °C24 January 2009	-0.7 °C30 July 2009	16.0 °C	448 mm	34	3
2008	33.7 °C2 January 2008	0.6 °C1 July 2008	16.1 °C	450 mm	29	0
2007	37.2 °C2 February 2007	-4.3 °C9 July 2007	14.7 °C	602 mm	24	11
2006	36.1 °C28 January 2006	-0.5 °C14 July 2006	15.7 °C	541 mm	23	1
2005	32.4 °C8 January 2005	-2.2 °C14 June 2005	15.2 °C	477 mm	20	2
2004	33.5 °C27 January 2004	0.3 °C19 August 2004	15.5 °C	834 mm	21	0
2003	34.0 °C4 February 2003	0.1 °C11 July 2003	15.7 °C	508 mm	30	0
2002	33.3 °C10 January 2002	-3.9 °C22 June 2002	15.1 °C	532 mm	18	8
2001	36.4 °C2 January 2001	-0.6 °C27 July 2001	15.4 °C	879 mm	27	2
2000	33.6 °C19 January 2000	-1.9 °C13 July 2000	15.0 °C	591 mm	19	2
1999	35.1 °C19 February 1999	0.6 °C8 July 1999	15.2 °C	737 mm	19	0
1998	33.0 °C26 December 1998	0.1 °C20 September 1998	15.5 °C	662 mm	17	0
1997	32.9 °C27 January 1997	-1.3 °C27 June 1997	15.4 °C	680 mm	14	3
1996	33.0 °C17 February 1996	-0.9 °C21 July 1996	15.4 °C	818 mm	16	4
1995	33.2 °C22 January 1995	-2.8 °C17 July 1995	15.1 °C	431 mm	25	12
1994	34.0 °C11 March 1994	-0.6 °C9 July 1994	15.8 °C	537 mm	30	3
1993	34.4 °C16 February 1993	-1.9 °C6 July 1993	15.2 °C	650 mm	20	5
1992	31.9 °C6 February 1992	-2.0 °C31 July 1992	14.9 °C	798 mm	18	8
1991	34.2 °C26 February 1991	-1.7 °C14 July 1991	15.3 °C	698 mm	19	3
1990	34.1 °C26 January 1990	-2.2 °C21 July 1990	15.4 °C	543 mm	19	3
1989	34.6 °C11 February 1989	-1.4 °C2 July 1989	15.8 °C	636 mm	30	1
1988	34.7 °C18 February 1988	-4.6 °C4 July 1988	14.8 °C	510 mm	24	10
1987	35.0 °C18 February 1987	-0.2 °C14 June 1987	15.3 °C	766 mm	22	2
1986	33.8 °C22 December 1986	-0.7 °C16 August 1986	15.0 °C	499 mm	14	1
1985	33.3 °C21 February 1985	-1.8 °C10 July 1985	15.2 °C	772 mm	12	2
1984	34.1 °C17 January 1984	-2.6 °C27 June 1984	14.4 °C	696 mm	18	6
1983	35.8 °C22 January 1983	-1.6 °C31 July 1983	15.1 °C	624 mm	29	7
1982	34.9 °C27 January 1982	-1.1 °C16 June 1982	15.5 °C	682 mm	34	3
1981	34.6 °C24 February 1981	-0.9 °C18 July 1981	15.7 °C	421 mm	18	1
1980	37.9 °C21 January 1980	-1.8 °C2 July 1980	15.9 °C	512 mm	29	4
1979	32.5 °C11 January 1979	-0.7 °C14 June 1979	15.5 °C	519 mm	15	1
1978	34.1 °C24 February 1978	-0.5 °C23 August 1978	15.2 °C	698 mm	19	1
1977	33.4 °C7 January 1977	-2.4 °C22 June 1977	15.5 °C	499 mm	19	1
1976	33.6 °C7 January 1976	-1.5 °C9 July 1976	14.3 °C	715 mm	15	3
1975	34.8 °C30 December 1975	-1.8 °C26 July 1975	15.3 °C	749 mm	21	5
1974	34.4 °C31 January 1974	-2.6 °C23 July 1974	14.9 °C	524 mm	11	3
1973	35.0 °C20 December 1973	0.7 °C14 July 1973	14.9 °C	625 mm	13	0
1972	36.5 °C24 January 1972	-1.4 °C3 August 1972	15.1 °C	764 mm	20	4
1971	35.4 °C25 December 1971	-0.6 °C17 June 1971	15.4 °C	357 mm	18	1
1970	35.8 °C24 December 1970	-2.4 °C30 June 1970	15.6 °C	427 mm	21	3
1969	35.3 °C22 January 1969	-1.2 °C17 June 1969	15.6 °C	791 mm	23	1
1968	34.5 °C27 January 1968	1.2 °C2 September 1968	16.0 °C	433 mm	23	0
1967	33.0 °C29 January 1967	-2.7 °C13 June 1967	15.5 °C	753 mm	24	3
1966	33.4 °C26 January 1966	-2.4 °C24 July 1966	15.1 °C	666 mm	12	3
1965	33.2 °C19 November 1965	-1.3 °C6 July 1965	15.4 °C	480 mm	21	5
1964	32.6 °C22 January 1964	-0.1 °C25 June 1964	14.8 °C	575 mm	11	2
1963	31.9 °C1 February 1963	0.6 °C5 August 1963	15.2 °C	786 mm	9	0
1962	36.0 °C19 December 1962	-1.4 °C2 July 1962	15.8 °C	346 mm	21	4
1961	33.1 °C29 January 1961	-1.7 °C12 June 1961	15.5 °C	437 mm	22	2
1960	35.4 °C12 January 1960	-1.5 °C7 July 1960	15.4 °C	540 mm	31	4
1959	37.3 °C3 February 1959	1.2 °C15 July 1959	15.4 °C	491 mm	23	0
1958	33.9 °C13 January 1958	-1.7 °C16 June 1958	15.9 °C	536 mm	22	1
1957	34.9 °C2 January 1957	-1.1 °C13 July 1957	15.6 °C	697 mm	27	2
1956	36.1 °C4 February 1956	0.3 °C10 June 1956	16.8 °C	339 mm	39	0
1955	36.8 °C5 January 1955	-1.3 °C10 July 1955	16.1 °C	461 mm	43	4
1954	34.1 °C23 February 1954	-0.1 °C4 August 1954	15.8 °C	550 mm	38	1
1953	35.4 °C19 January 1953	3.3 °C18 July 1953	16.7 °C	589 mm	24	0
1952	34.7 °C23 February 1952	0.7 °C2 August 1952	15.9 °C	449 mm	33	0
1951	35.7 °C2 February 1951	0.2 °C3 August 1951	16.2 °C	536 mm	22	0
1950	36.5 °C8 December 1950	1.7 °C31 July 1950	16.0 °C	325 mm	46	0
1949	37.7 °C13 January 1949	1.5 °C16 July 1949	15.8 °C	436 mm	29	0
1948	35.7 °C25 February 1948	1.5 °C7 August 1948	16.5 °C	379 mm	44	0
1947	35.3 °C28 January 1947	1.5 °C31 August 1947	16.7 °C	330 mm	39	0
1946	34.9 °C3 February 1946	-0.7 °C13 June 1946	16.1 °C	610 mm	35	1
1945	35.5 °C1 February 1945	-1.5 °C8 July 1945	15.6 °C	481 mm	37	2
1944	33.4 °C12 January 1944	-0.6 °C26 June 1944	15.5 °C	576 mm	19	1
1943	33.6 °C19 January 1943	-1.8 °C15 August 1943	16.3 °C	647 mm	33	2
1942	31.6 °C30 January 1942	-0.8 °C16 June 1942	14.7 °C	804 mm	10	2
1941	32.2 °C13 February 1941	1.2 °C16 August 1941	15.0 °C	817 mm	12	0
1940	33.6 °C10 January 1940	0.8 °C26 July 1940	14.4 °C	662 mm	16	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

20.4 °C

+0.5 °C

Hot days (≥ 30 °C)

38 d/yr

+13

Frost days (< 0 °C)

3 d/yr

Annual rainfall

620 mm

+41 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.6 °C	+1.6 °C	8 mm	-46 mm
Feb	28.1 °C	+1.1 °C	56 mm	+1 mm
Mar	23.4 °C	-0.8 °C	203 mm	+131 mm
Apr	18.5 °C	-1.5 °C	56 mm	+7 mm
May	17.0 °C	+1.1 °C	13 mm	-24 mm
Jun	12.6 °C	-0.1 °C	6 mm	-23 mm
Jul	12.0 °C	-0.1 °C	20 mm	-13 mm
Aug	14.5 °C	+0.7 °C	43 mm	+14 mm
Sep	17.3 °C	+1.1 °C	69 mm	+24 mm
Oct	20.1 °C	+0.8 °C	79 mm	+18 mm
Nov	23.2 °C	0.0 °C	61 mm	+2 mm
Dec	28.8 °C	+2.5 °C	6 mm	-49 mm

The year's extremes

Hottest day

35.3 °C

22 Feb 2025

Coldest day

-1.9 °C

1 Jul 2025

Wettest day

67.0 mm

7 Mar 2025

Windiest day

48.0 km/h

26 Dec 2025

Strongest gust

74.2 km/h

26 Dec 2025

Hottest feels-like

37.9 °C

22 Feb 2025

Coldest feels-like

-6.9 °C

1 Jul 2025

Sunniest day

14.3 h

2 Jan 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 Bahía Blanca?

Bahía Blanca has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.6 °C and it receives 579 mm of precipitation per year.

What is the hottest day ever recorded in Bahía Blanca?

The hottest day measured in Bahía Blanca between 1940 and 2025 was 13 January 2022, reaching 39.1 °C.

What is the coldest day in Bahía Blanca?

The coldest day measured in Bahía Blanca between 1940 and 2025 was 4 July 1988, at -4.6 °C.

Does it snow in Bahía Blanca?

Almost never: Bahía Blanca sees virtually no snow, with about 3 frost days per year.

Has the climate of Bahía Blanca warmed?

Between 1940 and 2025, no statistically significant temperature trend emerges in Bahía Blanca.

What is the wettest day in Bahía Blanca?

The wettest day measured in Bahía Blanca between 1940 and 2025 was 3 March 1987, with 132 mm of rain in 24 hours.

What was the windiest day in Bahía Blanca?

The windiest day measured in Bahía Blanca between 1940 and 2025 was 20 April 1976, with winds reaching 70.3 km/h.

What is the warmest month in Bahía Blanca?

The warmest month in Bahía Blanca is January (23.2 °C on average); the coldest is July (8.3 °C).

How much does it rain in Bahía Blanca?

Bahía Blanca receives on average 579 mm of precipitation per year, spread over about 76 rainy days.

Is it sunny in Bahía Blanca?

Bahía Blanca gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

What is the biggest single-day snowfall in Bahía Blanca?

The heaviest 24-hour snowfall measured in Bahía Blanca between 1940 and 2025 was 22 July 2009, with 4.9 cm.

Are there tropical nights in Bahía Blanca?

Yes: Bahía Blanca has on average 25 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Bahía Blanca?

In Bahía Blanca, between 1940 and 2025, the highest apparent temperature reached 39.6 °C on 22 December 2013, and the lowest was -9.7 °C on 9 July 2007.

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