Igaraçu do Tietê climate — normals and trends

Q: What is the climate of Igaraçu do Tietê?

Igaraçu do Tietê has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 1,294 mm of precipitation per year.

Q: What is the hottest day ever recorded in Igaraçu do Tietê?

The hottest day measured in Igaraçu do Tietê between 1940 and 2025 was 7 October 2020, reaching 39.6 °C.

Q: What is the coldest day in Igaraçu do Tietê?

The coldest day measured in Igaraçu do Tietê between 1940 and 2025 was 26 June 1994, at 1.8 °C.

Q: Does it snow in Igaraçu do Tietê?

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

Q: Has the climate of Igaraçu do Tietê warmed?

Yes: Igaraçu do Tietê warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Igaraçu do Tietê?

The wettest day measured in Igaraçu do Tietê between 1940 and 2025 was 20 November 1996, with 122 mm of rain in 24 hours.

Q: What was the windiest day in Igaraçu do Tietê?

The windiest day measured in Igaraçu do Tietê between 1940 and 2025 was 12 September 2004, with winds reaching 34.3 km/h.

Q: What is the warmest month in Igaraçu do Tietê?

The warmest month in Igaraçu do Tietê is February (24.0 °C on average); the coldest is July (17.9 °C).

Q: How much does it rain in Igaraçu do Tietê?

Igaraçu do Tietê receives on average 1,294 mm of precipitation per year, spread over about 145 rainy days.

Q: Is it sunny in Igaraçu do Tietê?

Igaraçu do Tietê gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Igaraçu do Tietê (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 21.5 °C and it receives 1,294 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 February (24.0 °C on average) and the coldest is July (17.9 °C). Rainfall peaks in January.

Igaraçu do Tietê averages 0 frost days, 74 hot days (≥ 30 °C) and 145 rainy days per year.

Igaraçu do Tietê has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.6 °C (on 7 October 2020) and the coldest 1.8 °C (on 26 June 1994).

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

Igaraçu do TietêSão Paulo

coords: -22.51°, -48.56°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthFebruaryColdest monthJulyWettest monthJanuaryDriest monthAugust

Mean daily temperature

21.5°C

Average daily high

26.8°C

Average daily low

17.1°C

Annual rainfall

1,294mm

Sunshine / day

9.9h

Mean relative humidity

74%

Average peak wind

15.0km/h

Seasonal range

6.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

74 d/yr

Rainy days (≥ 1 mm)

145 d/yr

Annual snowfall

0.0 cm

Average feels-like high

28.7 °C

Average feels-like low

17.5 °C

Average peak gust

34.0 km/h

Tropical nights (≥ 20 °C)

84 d/yr

Solar radiation

18.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.1 °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

39.6 °C

7 October 2020

Coldest day

1.8 °C

26 June 1994

Wettest day

122 mm

20 November 1996

Windiest day

34.3 km/h

12 September 2004

Strongest gust

84.2 km/h

22 September 2025

Hottest feels-like

42.3 °C

29 October 2012

Coldest feels-like

-1.4 °C

21 July 1981

Sunniest day

13.4 h

16 December 1942

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	36.1 °C30 September 2025	4.4 °C25 June 2025	22.2 °C	928 mm	139
2024	38.1 °C26 September 2024	6.9 °C27 August 2024	23.4 °C	965 mm	187
2023	38.2 °C12 November 2023	7.5 °C15 July 2023	22.4 °C	1,018 mm	118
2022	34.2 °C10 December 2022	6.1 °C18 May 2022	21.5 °C	1,110 mm	88
2021	37.5 °C21 September 2021	3.2 °C30 July 2021	21.9 °C	851 mm	126
2020	39.6 °C7 October 2020	6.0 °C27 May 2020	22.1 °C	970 mm	112
2019	37.3 °C12 September 2019	5.9 °C6 July 2019	23.2 °C	938 mm	154
2018	36.1 °C17 December 2018	7.4 °C21 May 2018	22.8 °C	785 mm	150
2017	36.9 °C12 October 2017	7.9 °C19 July 2017	22.6 °C	1,078 mm	131
2016	37.0 °C17 October 2016	6.5 °C13 June 2016	22.4 °C	1,330 mm	149
2015	38.5 °C24 September 2015	11.2 °C16 June 2015	23.2 °C	1,369 mm	137
2014	38.1 °C5 February 2014	9.6 °C1 July 2014	23.3 °C	819 mm	155
2013	35.5 °C4 December 2013	6.7 °C15 August 2013	21.8 °C	1,188 mm	108
2012	37.9 °C31 October 2012	7.2 °C19 July 2012	22.4 °C	1,380 mm	129
2011	36.5 °C30 September 2011	3.8 °C28 June 2011	21.8 °C	1,353 mm	107
2010	34.4 °C29 October 2010	7.5 °C16 August 2010	21.9 °C	1,123 mm	116
2009	35.3 °C6 March 2009	5.7 °C3 June 2009	21.9 °C	1,584 mm	78
2008	36.2 °C15 October 2008	6.7 °C17 June 2008	21.6 °C	1,118 mm	70
2007	36.5 °C29 October 2007	6.7 °C26 July 2007	22.4 °C	1,256 mm	116
2006	35.6 °C15 September 2006	6.5 °C6 September 2006	22.1 °C	1,070 mm	99
2005	35.1 °C13 October 2005	9.9 °C26 July 2005	22.1 °C	1,124 mm	82
2004	36.5 °C26 September 2004	8.3 °C27 May 2004	21.4 °C	1,317 mm	72
2003	36.1 °C19 October 2003	7.9 °C17 August 2003	21.9 °C	1,071 mm	90
2002	36.7 °C11 October 2002	6.3 °C3 September 2002	22.7 °C	1,034 mm	132
2001	35.1 °C7 November 2001	6.4 °C21 June 2001	22.0 °C	1,146 mm	114
2000	35.8 °C23 October 2000	4.3 °C18 July 2000	21.6 °C	1,453 mm	100
1999	36.1 °C21 January 1999	7.8 °C21 May 1999	21.5 °C	1,310 mm	91
1998	34.1 °C3 December 1998	9.1 °C9 June 1998	21.7 °C	1,483 mm	93
1997	35.3 °C9 September 1997	6.8 °C9 June 1997	21.7 °C	1,665 mm	94
1996	34.3 °C30 January 1996	7.4 °C13 July 1996	21.4 °C	1,584 mm	76
1995	34.9 °C11 September 1995	10.8 °C23 July 1995	21.8 °C	1,667 mm	93
1994	36.7 °C13 October 1994	1.8 °C26 June 1994	22.1 °C	1,273 mm	98
1993	34.6 °C15 November 1993	4.4 °C1 August 1993	21.6 °C	1,383 mm	78
1992	32.3 °C15 November 1992	8.2 °C24 July 1992	21.2 °C	1,493 mm	42
1991	34.2 °C16 October 1991	4.8 °C24 July 1991	21.4 °C	1,611 mm	59
1990	35.1 °C11 October 1990	4.6 °C29 July 1990	21.6 °C	1,276 mm	123
1989	34.0 °C25 October 1989	7.5 °C12 July 1989	21.0 °C	1,522 mm	52
1988	36.2 °C26 September 1988	3.8 °C5 June 1988	21.4 °C	1,294 mm	90
1987	34.3 °C15 September 1987	4.2 °C8 August 1987	21.5 °C	1,295 mm	89
1986	35.0 °C1 November 1986	8.1 °C1 June 1986	21.6 °C	1,312 mm	75
1985	37.5 °C17 November 1985	4.6 °C8 June 1985	21.5 °C	1,021 mm	90
1984	35.2 °C15 January 1984	6.0 °C27 August 1984	22.3 °C	1,019 mm	98
1983	32.8 °C17 February 1983	7.1 °C6 August 1983	21.4 °C	2,125 mm	45
1982	32.9 °C13 February 1982	9.2 °C31 July 1982	21.3 °C	1,683 mm	47
1981	33.8 °C19 September 1981	2.1 °C21 July 1981	21.1 °C	1,242 mm	52
1980	34.6 °C27 October 1980	6.5 °C28 June 1980	21.5 °C	1,221 mm	63
1979	34.2 °C7 December 1979	2.0 °C1 June 1979	21.0 °C	1,061 mm	60
1978	34.4 °C25 January 1978	4.1 °C15 August 1978	21.3 °C	1,196 mm	77
1977	34.0 °C11 March 1977	7.2 °C18 May 1977	22.1 °C	1,261 mm	90
1976	33.6 °C19 January 1976	7.2 °C16 August 1976	20.5 °C	1,833 mm	33
1975	34.0 °C9 September 1975	3.6 °C18 July 1975	21.4 °C	1,200 mm	83
1974	35.4 °C19 November 1974	6.2 °C17 August 1974	21.1 °C	1,337 mm	76
1973	34.3 °C22 February 1973	6.7 °C20 June 1973	21.5 °C	1,286 mm	77
1972	34.2 °C26 October 1972	3.5 °C9 July 1972	21.2 °C	1,653 mm	46
1971	35.8 °C26 January 1971	6.7 °C10 June 1971	21.3 °C	949 mm	72
1970	34.0 °C8 December 1970	7.3 °C3 July 1970	21.3 °C	981 mm	53
1969	34.7 °C11 September 1969	4.7 °C11 July 1969	21.9 °C	746 mm	101
1968	36.4 °C10 November 1968	5.2 °C18 May 1968	20.8 °C	847 mm	80
1967	33.8 °C6 September 1967	5.8 °C9 June 1967	21.5 °C	1,151 mm	64
1966	34.0 °C15 September 1966	4.4 °C6 August 1966	20.7 °C	1,331 mm	31
1965	33.6 °C10 September 1965	4.8 °C12 July 1965	20.4 °C	1,578 mm	22
1964	31.2 °C1 September 1964	7.3 °C6 June 1964	20.0 °C	1,532 mm	12
1963	38.8 °C17 October 1963	5.9 °C21 June 1963	21.9 °C	953 mm	88
1962	33.8 °C20 September 1962	5.5 °C18 July 1962	19.8 °C	1,499 mm	20
1961	37.8 °C27 September 1961	11.0 °C16 June 1961	21.9 °C	1,184 mm	69
1960	36.3 °C24 September 1960	7.5 °C10 July 1960	20.4 °C	1,552 mm	20
1959	34.4 °C7 September 1959	6.6 °C8 June 1959	21.4 °C	1,273 mm	53
1958	33.4 °C15 November 1958	8.7 °C23 June 1958	20.9 °C	1,260 mm	52
1957	34.7 °C19 October 1957	4.0 °C21 July 1957	20.5 °C	1,339 mm	20
1956	33.5 °C8 October 1956	7.2 °C6 June 1956	20.1 °C	1,191 mm	42
1955	36.1 °C1 October 1955	6.7 °C1 August 1955	20.7 °C	1,223 mm	42
1954	34.9 °C19 September 1954	6.8 °C21 June 1954	21.0 °C	1,226 mm	43
1953	32.9 °C21 August 1953	10.6 °C12 July 1953	20.9 °C	1,351 mm	14
1952	34.7 °C30 September 1952	7.1 °C17 July 1952	20.6 °C	1,213 mm	21
1951	34.5 °C26 September 1951	9.8 °C30 June 1951	20.7 °C	1,056 mm	36
1950	34.0 °C17 September 1950	8.1 °C12 July 1950	20.5 °C	1,467 mm	28
1949	32.1 °C13 October 1949	10.6 °C16 August 1949	20.2 °C	1,766 mm	7
1948	36.4 °C26 September 1948	8.5 °C15 June 1948	21.0 °C	1,131 mm	36
1947	32.6 °C6 January 1947	8.0 °C8 July 1947	20.0 °C	1,809 mm	14
1946	30.7 °C18 October 1946	7.3 °C4 June 1946	20.8 °C	1,967 mm	9
1945	31.9 °C28 September 1945	10.1 °C25 June 1945	20.5 °C	2,163 mm	9
1944	35.1 °C7 September 1944	10.1 °C11 July 1944	21.2 °C	1,312 mm	34
1943	32.9 °C17 January 1943	9.1 °C23 August 1943	20.1 °C	1,050 mm	18
1942	38.1 °C27 November 1942	5.9 °C18 June 1942	20.8 °C	792 mm	70
1941	30.8 °C7 January 1941	8.1 °C30 May 1941	20.5 °C	2,024 mm	10
1940	32.4 °C23 August 1940	9.9 °C17 August 1940	20.9 °C	1,686 mm	6

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

28.3 °C

+1.5 °C

Hot days (≥ 30 °C)

139 d/yr

+65

Frost days (< 0 °C)

0 d/yr

Annual rainfall

928 mm

-366 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.5 °C	+2.0 °C	153 mm	-59 mm
Feb	31.5 °C	+2.9 °C	102 mm	-79 mm
Mar	31.8 °C	+3.6 °C	60 mm	-76 mm
Apr	28.1 °C	+1.3 °C	102 mm	+41 mm
May	26.4 °C	+1.9 °C	16 mm	-45 mm
Jun	24.2 °C	+0.6 °C	42 mm	-2 mm
Jul	24.1 °C	+0.2 °C	5 mm	-30 mm
Aug	27.2 °C	+1.1 °C	2 mm	-31 mm
Sep	30.1 °C	+2.4 °C	21 mm	-45 mm
Oct	28.3 °C	+0.3 °C	97 mm	-29 mm
Nov	28.2 °C	+0.1 °C	97 mm	-45 mm
Dec	30.0 °C	+1.9 °C	231 mm	+33 mm

The year's extremes

Hottest day

36.1 °C

30 Sep 2025

Coldest day

4.4 °C

25 Jun 2025

Wettest day

63.6 mm

14 Dec 2025

Windiest day

33.2 km/h

9 Dec 2025

Strongest gust

84.2 km/h

22 Sep 2025

Hottest feels-like

39.5 °C

28 Dec 2025

Coldest feels-like

1.6 °C

25 Jun 2025

Sunniest day

13.4 h

11 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 Igaraçu do Tietê?

Igaraçu do Tietê has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 1,294 mm of precipitation per year.

What is the hottest day ever recorded in Igaraçu do Tietê?

The hottest day measured in Igaraçu do Tietê between 1940 and 2025 was 7 October 2020, reaching 39.6 °C.

What is the coldest day in Igaraçu do Tietê?

The coldest day measured in Igaraçu do Tietê between 1940 and 2025 was 26 June 1994, at 1.8 °C.

Does it snow in Igaraçu do Tietê?

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

Has the climate of Igaraçu do Tietê warmed?

Yes: Igaraçu do Tietê warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Igaraçu do Tietê?

The wettest day measured in Igaraçu do Tietê between 1940 and 2025 was 20 November 1996, with 122 mm of rain in 24 hours.

What was the windiest day in Igaraçu do Tietê?

The windiest day measured in Igaraçu do Tietê between 1940 and 2025 was 12 September 2004, with winds reaching 34.3 km/h.

What is the warmest month in Igaraçu do Tietê?

The warmest month in Igaraçu do Tietê is February (24.0 °C on average); the coldest is July (17.9 °C).

How much does it rain in Igaraçu do Tietê?

Igaraçu do Tietê receives on average 1,294 mm of precipitation per year, spread over about 145 rainy days.

Is it sunny in Igaraçu do Tietê?

Igaraçu do Tietê gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Are there tropical nights in Igaraçu do Tietê?

Yes: Igaraçu do Tietê has on average 84 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Igaraçu do Tietê?

In Igaraçu do Tietê, between 1940 and 2025, the highest apparent temperature reached 42.3 °C on 29 October 2012, and the lowest was -1.4 °C on 21 July 1981.

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