Formosa climate — normals and trends

Q: What is the climate of Formosa?

Formosa has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 22.7 °C and it receives 1,302 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 15 October 1963, reaching 39.3 °C.

Q: What is the coldest day in Formosa?

The coldest day measured in Formosa between 1940 and 2025 was 19 May 2022, at 6.8 °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 +1.5 °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 4 February 2018, with 142 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 21 January 1977, with winds reaching 27.6 km/h.

Q: What is the warmest month in Formosa?

The warmest month in Formosa is September (24.5 °C on average); the coldest is July (20.5 °C).

Q: How much does it rain in Formosa?

Formosa receives on average 1,302 mm of precipitation per year, spread over about 135 rainy days.

Q: Is it sunny in Formosa?

Formosa gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Formosa (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 22.7 °C and it receives 1,302 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 September (24.5 °C on average) and the coldest is July (20.5 °C). Rainfall peaks in December.

Formosa averages 0 frost days, 78 hot days (≥ 30 °C) and 135 rainy days per year.

Formosa has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.3 °C (on 15 October 1963) and the coldest 6.8 °C (on 19 May 2022).

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

FormosaGoiás

coords: -15.54°, -47.33°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthSeptemberColdest monthJulyWettest monthDecemberDriest monthJuly

Mean daily temperature

22.7°C

Average daily high

28.0°C

Average daily low

18.2°C

Annual rainfall

1,302mm

Sunshine / day

10.4h

Mean relative humidity

67%

Average peak wind

11.5km/h

Seasonal range

4.0°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

78 d/yr

Rainy days (≥ 1 mm)

135 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.9 °C

Average feels-like low

19.0 °C

Average peak gust

30.1 km/h

Tropical nights (≥ 20 °C)

67 d/yr

Solar radiation

19.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.5 °C

since 1940

+0.2 °C per decade · r² = 0.43 · 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

39.3 °C

15 October 1963

Coldest day

6.8 °C

19 May 2022

Wettest day

142 mm

4 February 2018

Windiest day

27.6 km/h

21 January 1977

Strongest gust

64.8 km/h

28 December 1958

Hottest feels-like

40.5 °C

5 January 1998

Coldest feels-like

3.1 °C

19 May 2022

Sunniest day

12.7 h

27 January 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	35.1 °C7 October 2025	11.9 °C6 July 2025	23.2 °C	776 mm	132
2024	36.4 °C5 October 2024	11.8 °C26 July 2024	23.2 °C	1,389 mm	113
2023	36.3 °C14 November 2023	11.0 °C6 July 2023	23.7 °C	625 mm	144
2022	34.3 °C14 September 2022	6.8 °C19 May 2022	22.7 °C	1,278 mm	82
2021	36.5 °C22 September 2021	11.1 °C30 June 2021	22.7 °C	1,066 mm	86
2020	37.3 °C9 October 2020	11.4 °C1 June 2020	22.7 °C	1,289 mm	88
2019	36.6 °C20 September 2019	11.9 °C11 July 2019	24.1 °C	712 mm	153
2018	35.9 °C29 September 2018	11.8 °C6 July 2018	23.3 °C	1,117 mm	105
2017	37.5 °C15 October 2017	12.0 °C6 July 2017	23.5 °C	1,091 mm	117
2016	35.7 °C19 October 2016	13.1 °C17 June 2016	24.3 °C	1,169 mm	189
2015	37.7 °C22 October 2015	12.6 °C4 August 2015	24.1 °C	805 mm	155
2014	37.0 °C19 October 2014	13.2 °C6 July 2014	23.5 °C	902 mm	98
2013	35.7 °C23 September 2013	13.6 °C7 July 2013	23.2 °C	1,382 mm	98
2012	36.9 °C30 October 2012	12.2 °C25 July 2012	23.5 °C	883 mm	131
2011	34.8 °C31 August 2011	12.0 °C14 July 2011	22.9 °C	1,433 mm	82
2010	35.5 °C5 October 2010	11.9 °C20 August 2010	23.6 °C	1,149 mm	136
2009	34.2 °C29 September 2009	13.2 °C4 June 2009	23.3 °C	1,360 mm	101
2008	37.6 °C28 October 2008	11.1 °C17 July 2008	23.0 °C	1,332 mm	87
2007	37.3 °C24 September 2007	11.9 °C1 August 2007	23.4 °C	917 mm	121
2006	35.2 °C18 September 2006	11.0 °C24 July 2006	22.6 °C	1,309 mm	70
2005	36.0 °C27 October 2005	12.3 °C6 July 2005	23.1 °C	1,436 mm	99
2004	35.6 °C7 October 2004	11.0 °C24 July 2004	23.1 °C	1,534 mm	94
2003	35.0 °C25 September 2003	11.0 °C3 July 2003	23.1 °C	892 mm	102
2002	36.3 °C22 October 2002	12.5 °C28 May 2002	23.7 °C	1,202 mm	149
2001	35.9 °C11 September 2001	13.4 °C16 July 2001	23.3 °C	969 mm	121
2000	36.0 °C22 October 2000	11.8 °C18 July 2000	23.2 °C	1,195 mm	99
1999	35.3 °C9 September 1999	13.4 °C22 May 1999	23.1 °C	1,417 mm	101
1998	36.3 °C19 September 1998	13.5 °C8 June 1998	24.0 °C	1,085 mm	175
1997	36.8 °C18 September 1997	12.4 °C30 July 1997	22.7 °C	1,526 mm	87
1996	34.7 °C25 September 1996	12.1 °C27 July 1996	23.1 °C	1,081 mm	101
1995	36.4 °C3 October 1995	11.3 °C8 June 1995	23.1 °C	1,229 mm	97
1994	36.7 °C3 October 1994	11.7 °C10 July 1994	23.2 °C	1,436 mm	93
1993	34.8 °C22 October 1993	10.6 °C25 May 1993	23.3 °C	1,000 mm	132
1992	32.7 °C20 October 1992	12.4 °C17 June 1992	22.3 °C	2,047 mm	44
1991	34.1 °C30 October 1991	11.7 °C8 July 1991	22.6 °C	1,373 mm	65
1990	34.6 °C11 November 1990	13.0 °C8 July 1990	23.2 °C	899 mm	99
1989	33.6 °C14 September 1989	9.6 °C17 July 1989	22.3 °C	1,795 mm	53
1988	34.5 °C28 September 1988	10.3 °C2 August 1988	22.5 °C	1,108 mm	55
1987	35.7 °C29 October 1987	11.9 °C26 July 1987	23.1 °C	1,322 mm	82
1986	34.1 °C21 August 1986	9.8 °C7 June 1986	22.5 °C	1,008 mm	68
1985	33.2 °C22 September 1985	7.9 °C10 June 1985	21.9 °C	1,749 mm	36
1984	33.8 °C11 October 1984	12.0 °C17 June 1984	22.5 °C	1,085 mm	57
1983	33.2 °C3 September 1983	12.1 °C13 August 1983	22.3 °C	1,862 mm	42
1982	34.7 °C26 November 1982	12.9 °C8 May 1982	22.5 °C	1,258 mm	55
1981	33.4 °C4 March 1981	11.5 °C11 July 1981	21.9 °C	1,534 mm	48
1980	34.6 °C29 October 1980	11.9 °C10 July 1980	22.2 °C	1,624 mm	48
1979	33.9 °C17 September 1979	9.4 °C1 June 1979	22.1 °C	1,691 mm	51
1978	34.0 °C7 October 1978	11.9 °C1 July 1978	22.1 °C	1,430 mm	44
1977	33.2 °C27 August 1977	10.2 °C18 May 1977	22.5 °C	1,140 mm	76
1976	33.3 °C11 August 1976	11.5 °C24 July 1976	22.4 °C	1,125 mm	46
1975	35.1 °C3 October 1975	10.0 °C18 July 1975	22.2 °C	896 mm	50
1974	34.2 °C12 September 1974	10.8 °C4 July 1974	22.1 °C	1,201 mm	46
1973	34.1 °C20 September 1973	11.1 °C27 July 1973	23.0 °C	1,537 mm	76
1972	33.2 °C26 October 1972	12.2 °C17 June 1972	22.5 °C	1,210 mm	44
1971	33.5 °C24 September 1971	10.2 °C21 July 1971	22.2 °C	1,263 mm	34
1970	33.3 °C27 September 1970	11.1 °C15 August 1970	22.4 °C	984 mm	55
1969	35.1 °C3 October 1969	12.1 °C17 July 1969	22.6 °C	1,207 mm	79
1968	34.8 °C9 October 1968	10.3 °C19 June 1968	21.4 °C	1,285 mm	31
1967	33.6 °C7 September 1967	9.7 °C21 July 1967	22.1 °C	1,035 mm	44
1966	33.4 °C17 September 1966	12.6 °C4 June 1966	21.8 °C	1,760 mm	35
1965	33.9 °C20 September 1965	11.8 °C27 July 1965	21.8 °C	1,838 mm	41
1964	31.8 °C12 September 1964	12.6 °C2 June 1964	21.5 °C	2,409 mm	19
1963	39.3 °C15 October 1963	12.2 °C9 July 1963	23.1 °C	1,024 mm	98
1962	34.7 °C13 September 1962	12.5 °C20 June 1962	22.3 °C	1,911 mm	45
1961	37.5 °C26 October 1961	14.0 °C31 May 1961	23.4 °C	923 mm	102
1960	36.4 °C26 September 1960	11.9 °C16 July 1960	22.2 °C	1,744 mm	55
1959	33.3 °C12 September 1959	13.0 °C22 June 1959	23.0 °C	1,329 mm	96
1958	36.4 °C24 November 1958	12.9 °C23 June 1958	22.9 °C	1,322 mm	86
1957	35.3 °C21 September 1957	11.5 °C1 June 1957	22.5 °C	1,595 mm	87
1956	35.2 °C26 September 1956	9.8 °C7 June 1956	22.2 °C	1,476 mm	65
1955	36.1 °C3 October 1955	13.8 °C1 July 1955	23.0 °C	1,080 mm	63
1954	35.9 °C22 October 1954	13.1 °C1 August 1954	22.9 °C	856 mm	69
1953	33.1 °C23 August 1953	13.9 °C30 July 1953	22.2 °C	1,489 mm	29
1952	35.2 °C2 October 1952	13.3 °C11 June 1952	22.2 °C	1,744 mm	59
1951	36.1 °C25 November 1951	11.8 °C16 July 1951	22.5 °C	861 mm	87
1950	35.3 °C7 September 1950	12.4 °C30 June 1950	22.4 °C	1,207 mm	52
1949	36.1 °C8 October 1949	12.5 °C18 May 1949	22.3 °C	1,225 mm	62
1948	34.1 °C27 September 1948	12.3 °C7 July 1948	22.4 °C	985 mm	78
1947	34.1 °C30 August 1947	12.6 °C17 July 1947	22.1 °C	1,593 mm	30
1946	33.9 °C23 September 1946	13.9 °C20 July 1946	22.8 °C	973 mm	66
1945	33.8 °C8 October 1945	12.7 °C30 May 1945	22.0 °C	1,711 mm	54
1944	33.4 °C17 September 1944	12.3 °C31 May 1944	21.6 °C	1,928 mm	47
1943	30.9 °C20 September 1943	11.8 °C10 June 1943	20.8 °C	1,946 mm	8
1942	35.8 °C7 October 1942	11.0 °C24 June 1942	22.7 °C	879 mm	80
1941	33.3 °C2 September 1941	13.9 °C7 June 1941	22.4 °C	1,667 mm	46
1940	33.0 °C26 August 1940	12.9 °C8 June 1940	21.8 °C	1,860 mm	18

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

28.9 °C

+0.9 °C

Hot days (≥ 30 °C)

132 d/yr

+54

Frost days (< 0 °C)

0 d/yr

Annual rainfall

776 mm

-526 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	27.7 °C	-0.1 °C	274 mm	+62 mm
Feb	29.4 °C	+1.6 °C	48 mm	-122 mm
Mar	30.1 °C	+2.3 °C	40 mm	-133 mm
Apr	28.9 °C	+1.3 °C	69 mm	-8 mm
May	26.9 °C	-0.1 °C	2 mm	-18 mm
Jun	27.3 °C	+0.8 °C	1 mm	-4 mm
Jul	27.2 °C	+0.6 °C	0 mm	-3 mm
Aug	29.6 °C	+0.8 °C	0 mm	-4 mm
Sep	31.1 °C	+0.4 °C	9 mm	-17 mm
Oct	30.9 °C	+0.9 °C	39 mm	-89 mm
Nov	29.6 °C	+1.5 °C	139 mm	-88 mm
Dec	28.1 °C	+0.6 °C	155 mm	-104 mm

The year's extremes

Hottest day

35.1 °C

7 Oct 2025

Coldest day

11.9 °C

6 Jul 2025

Wettest day

36.3 mm

5 Jan 2025

Windiest day

21.2 km/h

17 May 2025

Strongest gust

48.2 km/h

26 Sep 2025

Hottest feels-like

37.3 °C

27 Dec 2025

Coldest feels-like

9.0 °C

12 Aug 2025

Sunniest day

12.7 h

27 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 Formosa?

Formosa has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 22.7 °C and it receives 1,302 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 15 October 1963, reaching 39.3 °C.

What is the coldest day in Formosa?

The coldest day measured in Formosa between 1940 and 2025 was 19 May 2022, at 6.8 °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 +1.5 °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 4 February 2018, with 142 mm of rain in 24 hours.

What was the windiest day in Formosa?

The windiest day measured in Formosa between 1940 and 2025 was 21 January 1977, with winds reaching 27.6 km/h.

What is the warmest month in Formosa?

The warmest month in Formosa is September (24.5 °C on average); the coldest is July (20.5 °C).

How much does it rain in Formosa?

Formosa receives on average 1,302 mm of precipitation per year, spread over about 135 rainy days.

Is it sunny in Formosa?

Formosa gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Are there tropical nights in Formosa?

Yes: Formosa has on average 67 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 40.5 °C on 5 January 1998, and the lowest was 3.1 °C on 19 May 2022.

Compare Formosa with another city

Pick a second city: its normals will be set against these, indicator by indicator.

Nearby cities

The climate around Formosa

Other cities — Brazil

All cities in Brazil →