Formosa climate — normals and trends

Q: What is the climate of Formosa?

Formosa has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.2 °C and it receives 1,575 mm of precipitation per year.

Q: What is the hottest day ever recorded in Formosa?

The hottest day measured in Formosa between 1940 and 2025 was 1 October 2020, reaching 43.1 °C.

Q: What is the coldest day in Formosa?

The coldest day measured in Formosa between 1940 and 2025 was 18 July 2017, at -0.9 °C.

Q: Does it snow in Formosa?

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

Q: Has the climate of Formosa warmed?

Yes: Formosa warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Formosa?

The wettest day measured in Formosa between 1940 and 2025 was 17 March 1983, with 151 mm of rain in 24 hours.

Q: What was the windiest day in Formosa?

The windiest day measured in Formosa between 1940 and 2025 was 5 October 1942, with winds reaching 54.4 km/h.

Q: What is the warmest month in Formosa?

The warmest month in Formosa is January (27.5 °C on average); the coldest is July (16.7 °C).

Q: How much does it rain in Formosa?

Formosa receives on average 1,575 mm of precipitation per year, spread over about 121 rainy days.

Q: Is it sunny in Formosa?

Formosa gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

Formosa (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 22.2 °C and it receives 1,575 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 (27.5 °C on average) and the coldest is July (16.7 °C). Rainfall peaks in October.

Formosa averages 0 frost days, 132 hot days (≥ 30 °C) and 121 rainy days per year.

Formosa has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.

The hottest day of the period reached 43.1 °C (on 1 October 2020) and the coldest -0.9 °C (on 18 July 2017).

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

FormosaFormosa

coords: -26.18°, -58.17°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthOctoberDriest monthJuly

Mean daily temperature

22.2°C

Average daily high

27.3°C

Average daily low

17.8°C

Annual rainfall

1,575mm

Sunshine / day

9.3h

Mean relative humidity

73%

Average peak wind

18.0km/h

Seasonal range

10.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

132 d/yr

Rainy days (≥ 1 mm)

121 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.2 °C

Average feels-like low

18.1 °C

Average peak gust

34.8 km/h

Tropical nights (≥ 20 °C)

149 d/yr

Solar radiation

17.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.8 °C

since 1940

+0.1 °C per decade · r² = 0.14 · 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

43.1 °C

1 October 2020

Coldest day

-0.9 °C

18 July 2017

Wettest day

151 mm

17 March 1983

Windiest day

54.4 km/h

5 October 1942

Strongest gust

98.3 km/h

5 June 1992

Hottest feels-like

46.9 °C

8 December 2022

Coldest feels-like

-4.6 °C

2 August 1991

Sunniest day

13.6 h

28 December 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	40.4 °C6 February 2025	1.5 °C24 June 2025	22.5 °C	1,388 mm	143	0
2024	40.9 °C16 March 2024	1.3 °C10 July 2024	23.4 °C	1,315 mm	187	0
2023	40.9 °C16 October 2023	4.5 °C19 July 2023	23.9 °C	1,263 mm	178	0
2022	41.3 °C17 January 2022	2.8 °C12 June 2022	22.5 °C	1,051 mm	152	0
2021	39.6 °C30 December 2021	0.5 °C30 June 2021	22.3 °C	1,050 mm	166	0
2020	43.1 °C1 October 2020	0.9 °C21 August 2020	23.0 °C	979 mm	193	0
2019	39.9 °C30 October 2019	2.4 °C6 July 2019	22.9 °C	1,288 mm	145	0
2018	37.5 °C11 December 2018	2.8 °C17 June 2018	22.4 °C	1,436 mm	150	0
2017	39.7 °C16 December 2017	-0.9 °C18 July 2017	23.1 °C	1,610 mm	159	1
2016	37.7 °C26 August 2016	1.6 °C12 June 2016	22.0 °C	1,493 mm	140	0
2015	36.9 °C12 January 2015	5.4 °C19 June 2015	23.1 °C	1,973 mm	148	0
2014	39.8 °C16 October 2014	3.5 °C25 July 2014	23.2 °C	1,798 mm	143	0
2013	39.6 °C24 January 2013	-0.1 °C27 August 2013	22.2 °C	1,317 mm	139	1
2012	38.9 °C10 March 2012	1.2 °C8 June 2012	23.2 °C	1,031 mm	170	0
2011	39.5 °C22 December 2011	0.8 °C27 June 2011	22.2 °C	1,289 mm	141	0
2010	39.6 °C3 February 2010	1.4 °C5 August 2010	21.9 °C	1,545 mm	145	0
2009	39.3 °C19 November 2009	1.3 °C25 July 2009	22.3 °C	1,284 mm	172	0
2008	39.9 °C21 December 2008	1.9 °C16 June 2008	22.5 °C	1,066 mm	161	0
2007	37.8 °C10 January 2007	2.2 °C11 July 2007	22.1 °C	1,637 mm	167	0
2006	39.0 °C15 January 2006	3.1 °C31 July 2006	23.1 °C	1,328 mm	166	0
2005	39.4 °C21 February 2005	2.7 °C19 July 2005	22.4 °C	1,303 mm	157	0
2004	38.9 °C31 January 2004	2.7 °C13 June 2004	22.0 °C	1,257 mm	150	0
2003	40.9 °C23 September 2003	3.3 °C12 July 2003	22.4 °C	1,633 mm	145	0
2002	38.7 °C7 October 2002	2.8 °C2 September 2002	22.6 °C	1,824 mm	154	0
2001	36.5 °C9 February 2001	0.0 °C28 July 2001	22.6 °C	1,649 mm	151	0
2000	39.6 °C21 January 2000	-0.6 °C13 July 2000	21.9 °C	1,889 mm	137	1
1999	40.2 °C30 November 1999	1.1 °C15 August 1999	22.0 °C	1,476 mm	159	0
1998	38.4 °C26 January 1998	4.3 °C10 July 1998	21.8 °C	2,460 mm	104	0
1997	36.3 °C27 December 1997	5.1 °C30 June 1997	23.1 °C	1,701 mm	164	0
1996	38.3 °C11 January 1996	0.8 °C30 June 1996	21.7 °C	2,097 mm	118	0
1995	40.5 °C17 December 1995	3.3 °C5 August 1995	22.4 °C	1,222 mm	153	0
1994	38.9 °C22 September 1994	1.0 °C9 July 1994	22.7 °C	1,729 mm	142	0
1993	36.5 °C28 February 1993	0.7 °C31 July 1993	22.0 °C	1,608 mm	144	0
1992	38.5 °C8 February 1992	0.8 °C19 July 1992	21.5 °C	1,569 mm	107	0
1991	38.7 °C21 January 1991	0.3 °C2 August 1991	22.3 °C	1,678 mm	135	0
1990	38.6 °C14 March 1990	2.2 °C29 July 1990	21.7 °C	2,152 mm	127	0
1989	36.7 °C23 December 1989	1.3 °C6 July 1989	21.6 °C	1,518 mm	121	0
1988	38.4 °C11 November 1988	0.7 °C24 July 1988	21.6 °C	1,307 mm	146	0
1987	39.5 °C11 October 1987	1.7 °C16 June 1987	21.7 °C	1,930 mm	129	0
1986	38.4 °C8 January 1986	4.6 °C5 September 1986	22.7 °C	2,190 mm	139	0
1985	40.8 °C8 December 1985	2.8 °C12 July 1985	22.6 °C	1,469 mm	148	0
1984	39.1 °C9 January 1984	1.8 °C26 August 1984	22.1 °C	1,810 mm	132	0
1983	37.3 °C9 December 1983	4.1 °C7 June 1983	21.7 °C	1,626 mm	133	0
1982	38.1 °C16 January 1982	3.9 °C29 June 1982	22.3 °C	1,656 mm	118	0
1981	35.4 °C24 October 1981	0.7 °C19 July 1981	22.0 °C	1,420 mm	126	0
1980	37.0 °C20 March 1980	1.5 °C31 July 1980	22.0 °C	1,730 mm	138	0
1979	38.9 °C27 January 1979	1.9 °C31 May 1979	21.8 °C	1,689 mm	115	0
1978	39.6 °C30 January 1978	3.8 °C15 August 1978	22.4 °C	1,178 mm	152	0
1977	39.9 °C10 March 1977	3.6 °C14 August 1977	23.0 °C	1,196 mm	150	0
1976	36.8 °C29 February 1976	1.4 °C10 July 1976	21.4 °C	1,025 mm	131	0
1975	39.4 °C14 February 1975	1.0 °C18 July 1975	21.6 °C	1,506 mm	102	0
1974	38.3 °C4 November 1974	2.8 °C19 August 1974	21.6 °C	1,270 mm	131	0
1973	37.1 °C7 January 1973	5.4 °C28 June 1973	21.7 °C	2,065 mm	114	0
1972	37.9 °C12 January 1972	2.3 °C8 July 1972	22.0 °C	1,886 mm	121	0
1971	37.5 °C20 December 1971	1.5 °C12 June 1971	21.3 °C	1,505 mm	120	0
1970	40.0 °C8 December 1970	1.9 °C2 July 1970	22.3 °C	1,768 mm	145	0
1969	38.8 °C11 February 1969	2.2 °C9 July 1969	22.0 °C	2,095 mm	137	0
1968	39.2 °C12 December 1968	3.0 °C17 May 1968	22.1 °C	1,518 mm	136	0
1967	37.4 °C29 December 1967	2.2 °C14 June 1967	22.2 °C	2,069 mm	137	0
1966	37.6 °C13 December 1966	2.1 °C5 August 1966	21.7 °C	1,879 mm	110	0
1965	36.9 °C26 January 1965	1.1 °C11 July 1965	21.5 °C	1,464 mm	104	0
1964	38.3 °C26 January 1964	2.2 °C30 June 1964	21.4 °C	1,009 mm	131	0
1963	39.6 °C3 January 1963	2.0 °C17 June 1963	22.7 °C	1,387 mm	145	0
1962	39.8 °C24 December 1962	2.5 °C17 July 1962	20.7 °C	1,267 mm	122	0
1961	38.7 °C21 January 1961	0.3 °C16 June 1961	22.6 °C	1,507 mm	145	0
1960	39.0 °C24 December 1960	0.6 °C9 July 1960	21.7 °C	1,165 mm	142	0
1959	35.6 °C8 September 1959	6.1 °C6 July 1959	21.9 °C	2,432 mm	114	0
1958	39.5 °C13 February 1958	3.5 °C10 August 1958	22.1 °C	1,876 mm	121	0
1957	37.6 °C18 October 1957	3.4 °C20 July 1957	21.9 °C	1,490 mm	111	0
1956	34.1 °C28 December 1956	3.2 °C20 September 1956	20.9 °C	1,672 mm	69	0
1955	36.9 °C10 February 1955	0.6 °C31 July 1955	21.4 °C	1,520 mm	91	0
1954	36.2 °C1 December 1954	6.1 °C4 July 1954	21.7 °C	1,794 mm	99	0
1953	38.3 °C5 January 1953	5.0 °C20 July 1953	22.6 °C	1,911 mm	92	0
1952	37.5 °C11 December 1952	5.4 °C19 June 1952	22.1 °C	1,227 mm	108	0
1951	34.1 °C25 September 1951	5.2 °C29 June 1951	22.1 °C	2,168 mm	76	0
1950	34.9 °C10 November 1950	4.7 °C4 August 1950	21.7 °C	1,547 mm	61	0
1949	35.9 °C14 November 1949	5.0 °C17 July 1949	21.6 °C	1,804 mm	88	0
1948	34.6 °C23 September 1948	5.6 °C23 May 1948	21.9 °C	2,283 mm	67	0
1947	33.9 °C5 February 1947	4.7 °C11 July 1947	21.7 °C	1,785 mm	81	0
1946	36.7 °C3 January 1946	3.3 °C21 July 1946	21.6 °C	2,186 mm	68	0
1945	38.6 °C10 January 1945	3.2 °C24 June 1945	22.9 °C	1,351 mm	119	0
1944	39.1 °C7 February 1944	3.5 °C27 June 1944	23.6 °C	1,200 mm	135	0
1943	40.9 °C17 January 1943	5.5 °C31 August 1943	23.5 °C	762 mm	149	0
1942	41.2 °C26 November 1942	2.3 °C19 June 1942	22.6 °C	1,166 mm	163	0
1941	35.2 °C15 February 1941	4.5 °C26 June 1941	22.0 °C	1,992 mm	87	0
1940	33.3 °C25 December 1940	6.0 °C9 August 1940	21.6 °C	1,808 mm	87	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

28.1 °C

+0.8 °C

Hot days (≥ 30 °C)

143 d/yr

+11

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1388 mm

-187 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	35.0 °C	+2.5 °C	27 mm	-121 mm
Feb	36.7 °C	+5.0 °C	68 mm	-75 mm
Mar	32.7 °C	+2.4 °C	84 mm	-51 mm
Apr	26.3 °C	-0.7 °C	80 mm	-73 mm
May	25.6 °C	+1.9 °C	245 mm	+121 mm
Jun	19.1 °C	-2.5 °C	147 mm	+50 mm
Jul	23.5 °C	+1.6 °C	39 mm	-31 mm
Aug	24.0 °C	+0.2 °C	79 mm	-1 mm
Sep	26.4 °C	+0.8 °C	151 mm	+22 mm
Oct	27.4 °C	-0.4 °C	150 mm	-30 mm
Nov	30.0 °C	+0.3 °C	85 mm	-81 mm
Dec	31.5 °C	-0.2 °C	233 mm	+82 mm

The year's extremes

Hottest day

40.4 °C

6 Feb 2025

Coldest day

1.5 °C

24 Jun 2025

Wettest day

70.2 mm

9 May 2025

Windiest day

36.4 km/h

27 May 2025

Strongest gust

77.4 km/h

7 Nov 2025

Hottest feels-like

45.6 °C

6 Feb 2025

Coldest feels-like

-1.7 °C

24 Jun 2025

Sunniest day

13.6 h

28 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 Formosa?

Formosa has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.2 °C and it receives 1,575 mm of precipitation per year.

What is the hottest day ever recorded in Formosa?

The hottest day measured in Formosa between 1940 and 2025 was 1 October 2020, reaching 43.1 °C.

What is the coldest day in Formosa?

The coldest day measured in Formosa between 1940 and 2025 was 18 July 2017, at -0.9 °C.

Does it snow in Formosa?

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

Has the climate of Formosa warmed?

Yes: Formosa warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Formosa?

The wettest day measured in Formosa between 1940 and 2025 was 17 March 1983, with 151 mm of rain in 24 hours.

What was the windiest day in Formosa?

The windiest day measured in Formosa between 1940 and 2025 was 5 October 1942, with winds reaching 54.4 km/h.

What is the warmest month in Formosa?

The warmest month in Formosa is January (27.5 °C on average); the coldest is July (16.7 °C).

How much does it rain in Formosa?

Formosa receives on average 1,575 mm of precipitation per year, spread over about 121 rainy days.

Is it sunny in Formosa?

Formosa gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

Are there tropical nights in Formosa?

Yes: Formosa has on average 149 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Formosa?

In Formosa, between 1940 and 2025, the highest apparent temperature reached 46.9 °C on 8 December 2022, and the lowest was -4.6 °C on 2 August 1991.

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