Jacareí climate — normals and trends

Q: What is the climate of Jacareí?

Jacareí has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.9 °C and it receives 1,326 mm of precipitation per year.

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

The hottest day measured in Jacareí between 1940 and 2025 was 19 January 2015, reaching 36.9 °C.

Q: What is the coldest day in Jacareí?

The coldest day measured in Jacareí between 1940 and 2025 was 12 July 1965, at 2.4 °C.

Q: Does it snow in Jacareí?

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

Q: Has the climate of Jacareí warmed?

Yes: Jacareí warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Jacareí?

The wettest day measured in Jacareí between 1940 and 2025 was 19 January 1977, with 101 mm of rain in 24 hours.

Q: What was the windiest day in Jacareí?

The windiest day measured in Jacareí between 1940 and 2025 was 10 December 2025, with winds reaching 37.3 km/h.

Q: What is the warmest month in Jacareí?

The warmest month in Jacareí is February (22.8 °C on average); the coldest is July (16.3 °C).

Q: How much does it rain in Jacareí?

Jacareí receives on average 1,326 mm of precipitation per year, spread over about 163 rainy days.

Q: Is it sunny in Jacareí?

Jacareí gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.

Jacareí (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 19.9 °C and it receives 1,326 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 (22.8 °C on average) and the coldest is July (16.3 °C). Rainfall peaks in January.

Jacareí averages 0 frost days, 33 hot days (≥ 30 °C) and 163 rainy days per year.

Jacareí has warmed by +1.9 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.

The hottest day of the period reached 36.9 °C (on 19 January 2015) and the coldest 2.4 °C (on 12 July 1965).

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

JacareíSão Paulo

coords: -23.31°, -45.97°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthFebruaryColdest monthJulyWettest monthJanuaryDriest monthAugust

Mean daily temperature

19.9°C

Average daily high

25.0°C

Average daily low

15.8°C

Annual rainfall

1,326mm

Sunshine / day

9.1h

Mean relative humidity

80%

Average peak wind

12.1km/h

Seasonal range

6.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

33 d/yr

Rainy days (≥ 1 mm)

163 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.0 °C

Average feels-like low

16.5 °C

Average peak gust

28.0 km/h

Tropical nights (≥ 20 °C)

30 d/yr

Solar radiation

16.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °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

36.9 °C

19 January 2015

Coldest day

2.4 °C

12 July 1965

Wettest day

101 mm

19 January 1977

Windiest day

37.3 km/h

10 December 2025

Strongest gust

85.7 km/h

17 December 1947

Hottest feels-like

40.7 °C

19 January 2015

Coldest feels-like

-1.0 °C

21 July 1981

Sunniest day

13.4 h

28 December 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	35.1 °C26 December 2025	4.1 °C25 June 2025	20.4 °C	993 mm	76
2024	35.1 °C2 October 2024	4.9 °C13 August 2024	21.1 °C	1,177 mm	89
2023	35.8 °C13 November 2023	6.2 °C16 May 2023	20.8 °C	1,236 mm	69
2022	33.0 °C9 September 2022	5.6 °C20 May 2022	19.7 °C	1,393 mm	46
2021	34.6 °C20 September 2021	2.8 °C30 July 2021	20.2 °C	992 mm	67
2020	36.3 °C2 October 2020	6.0 °C26 August 2020	20.4 °C	1,132 mm	60
2019	34.7 °C4 November 2019	5.0 °C7 July 2019	21.2 °C	1,109 mm	81
2018	33.3 °C17 December 2018	7.1 °C21 May 2018	20.8 °C	1,008 mm	54
2017	33.8 °C12 October 2017	7.8 °C11 June 2017	20.8 °C	1,011 mm	68
2016	34.0 °C17 October 2016	3.1 °C13 June 2016	20.8 °C	1,225 mm	80
2015	36.9 °C19 January 2015	9.3 °C27 June 2015	21.5 °C	1,436 mm	73
2014	35.8 °C19 October 2014	8.7 °C21 July 2014	21.3 °C	834 mm	103
2013	34.1 °C11 November 2013	7.2 °C24 July 2013	20.2 °C	1,236 mm	50
2012	34.2 °C31 October 2012	6.6 °C14 July 2012	20.6 °C	1,243 mm	54
2011	32.9 °C1 October 2011	3.9 °C5 August 2011	20.0 °C	1,297 mm	48
2010	33.4 °C14 February 2010	6.6 °C13 June 2010	20.4 °C	1,270 mm	76
2009	33.3 °C2 March 2009	4.7 °C4 June 2009	20.6 °C	1,550 mm	44
2008	33.5 °C15 October 2008	7.4 °C19 July 2008	20.0 °C	1,279 mm	36
2007	34.5 °C21 October 2007	3.6 °C30 July 2007	20.6 °C	1,067 mm	63
2006	33.9 °C25 January 2006	5.0 °C6 September 2006	20.3 °C	1,236 mm	37
2005	33.7 °C14 October 2005	8.0 °C10 July 2005	20.6 °C	1,149 mm	38
2004	33.0 °C26 September 2004	6.6 °C26 July 2004	19.8 °C	1,314 mm	28
2003	33.6 °C13 February 2003	7.0 °C18 August 2003	20.5 °C	1,110 mm	49
2002	34.8 °C16 October 2002	6.6 °C2 September 2002	21.0 °C	1,128 mm	63
2001	32.3 °C8 January 2001	7.2 °C22 June 2001	20.4 °C	1,094 mm	36
2000	33.7 °C23 October 2000	4.1 °C17 July 2000	19.9 °C	1,450 mm	34
1999	32.9 °C1 October 1999	6.7 °C16 August 1999	19.8 °C	1,316 mm	32
1998	33.0 °C31 January 1998	8.1 °C18 July 1998	20.3 °C	1,282 mm	45
1997	34.0 °C11 November 1997	5.6 °C11 August 1997	20.3 °C	1,284 mm	55
1996	33.1 °C25 January 1996	5.7 °C3 August 1996	19.8 °C	1,639 mm	38
1995	33.4 °C16 January 1995	8.9 °C2 June 1995	20.2 °C	1,671 mm	45
1994	33.8 °C13 October 1994	2.8 °C10 July 1994	20.7 °C	1,316 mm	59
1993	33.4 °C30 November 1993	5.5 °C1 August 1993	20.3 °C	1,279 mm	42
1992	31.6 °C22 February 1992	6.8 °C26 August 1992	20.1 °C	1,460 mm	20
1991	32.1 °C15 October 1991	7.3 °C17 August 1991	20.0 °C	1,449 mm	20
1990	32.9 °C11 October 1990	3.5 °C24 June 1990	20.2 °C	1,164 mm	51
1989	31.9 °C31 January 1989	5.6 °C22 July 1989	19.6 °C	1,368 mm	18
1988	33.5 °C19 January 1988	5.1 °C6 June 1988	19.9 °C	1,424 mm	38
1987	32.1 °C23 February 1987	3.4 °C9 August 1987	20.1 °C	1,309 mm	38
1986	32.8 °C7 October 1986	6.7 °C9 July 1986	20.4 °C	1,609 mm	41
1985	32.6 °C17 November 1985	4.7 °C8 June 1985	19.8 °C	1,262 mm	23
1984	33.3 °C4 February 1984	4.7 °C27 August 1984	20.5 °C	1,037 mm	45
1983	32.2 °C17 February 1983	6.5 °C6 August 1983	20.1 °C	1,887 mm	16
1982	31.2 °C4 November 1982	9.1 °C31 July 1982	19.9 °C	1,417 mm	12
1981	32.1 °C20 September 1981	3.2 °C21 July 1981	19.7 °C	1,310 mm	20
1980	32.2 °C27 October 1980	5.2 °C27 September 1980	20.2 °C	1,190 mm	31
1979	32.1 °C7 February 1979	3.1 °C1 June 1979	19.5 °C	1,221 mm	23
1978	33.6 °C24 January 1978	3.5 °C16 August 1978	19.7 °C	1,250 mm	30
1977	32.7 °C9 February 1977	8.7 °C22 May 1977	20.5 °C	1,438 mm	38
1976	33.0 °C19 January 1976	3.5 °C16 August 1976	19.4 °C	1,789 mm	18
1975	32.3 °C17 February 1975	4.3 °C8 July 1975	19.7 °C	1,348 mm	30
1974	33.0 °C19 November 1974	6.3 °C30 June 1974	19.6 °C	1,346 mm	19
1973	32.8 °C10 February 1973	6.1 °C20 June 1973	20.1 °C	1,320 mm	32
1972	32.3 °C26 October 1972	5.2 °C9 July 1972	19.8 °C	1,482 mm	17
1971	33.0 °C26 January 1971	6.7 °C25 April 1971	19.6 °C	1,094 mm	37
1970	31.9 °C8 December 1970	6.3 °C17 July 1970	19.6 °C	1,175 mm	16
1969	32.6 °C5 January 1969	4.1 °C11 July 1969	19.9 °C	951 mm	40
1968	33.7 °C15 December 1968	4.5 °C18 May 1968	18.8 °C	935 mm	24
1967	31.5 °C2 December 1967	7.1 °C11 June 1967	20.0 °C	1,287 mm	10
1966	31.4 °C19 January 1966	7.4 °C23 September 1966	19.2 °C	1,626 mm	16
1965	32.3 °C19 September 1965	2.4 °C12 July 1965	19.1 °C	1,563 mm	9
1964	29.7 °C1 September 1964	4.3 °C29 July 1964	18.5 °C	1,482 mm	0
1963	34.3 °C26 September 1963	5.9 °C22 June 1963	19.9 °C	1,134 mm	49
1962	30.8 °C8 September 1962	4.1 °C7 July 1962	18.3 °C	1,659 mm	3
1961	36.6 °C28 September 1961	9.2 °C19 June 1961	20.3 °C	1,187 mm	39
1960	33.7 °C24 September 1960	5.5 °C16 July 1960	18.8 °C	1,392 mm	8
1959	32.2 °C11 October 1959	7.7 °C8 June 1959	19.8 °C	1,197 mm	22
1958	32.2 °C16 November 1958	5.8 °C22 June 1958	19.4 °C	1,406 mm	17
1957	32.1 °C19 October 1957	4.5 °C22 July 1957	19.0 °C	1,476 mm	5
1956	32.0 °C1 February 1956	6.0 °C6 June 1956	18.5 °C	1,189 mm	20
1955	32.3 °C1 October 1955	5.0 °C26 May 1955	18.9 °C	1,129 mm	16
1954	32.9 °C22 September 1954	7.3 °C21 June 1954	19.4 °C	1,492 mm	15
1953	30.9 °C13 January 1953	7.7 °C30 July 1953	19.5 °C	1,324 mm	7
1952	32.1 °C30 September 1952	5.6 °C16 July 1952	19.2 °C	1,173 mm	10
1951	32.4 °C23 November 1951	6.2 °C4 June 1951	19.1 °C	1,221 mm	9
1950	31.5 °C17 September 1950	6.6 °C15 July 1950	18.9 °C	1,502 mm	9
1949	30.1 °C18 March 1949	7.2 °C3 July 1949	18.7 °C	1,791 mm	1
1948	34.1 °C27 September 1948	8.0 °C7 July 1948	19.2 °C	1,266 mm	12
1947	32.4 °C8 January 1947	6.3 °C2 September 1947	18.7 °C	1,663 mm	12
1946	30.6 °C6 January 1946	6.8 °C17 June 1946	19.5 °C	1,779 mm	3
1945	30.3 °C28 September 1945	8.2 °C12 July 1945	19.2 °C	2,050 mm	1
1944	33.4 °C7 September 1944	8.5 °C28 July 1944	19.3 °C	1,400 mm	10
1943	30.0 °C18 January 1943	6.2 °C8 August 1943	18.4 °C	1,047 mm	1
1942	34.5 °C6 October 1942	4.1 °C25 June 1942	18.7 °C	1,042 mm	17
1941	30.8 °C12 January 1941	9.0 °C6 September 1941	19.4 °C	1,979 mm	4
1940	31.0 °C23 August 1940	9.0 °C28 September 1940	19.6 °C	1,623 mm	4

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

26.0 °C

+1.0 °C

Hot days (≥ 30 °C)

76 d/yr

+43

Frost days (< 0 °C)

0 d/yr

Annual rainfall

993 mm

-333 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.3 °C	+0.9 °C	211 mm	-3 mm
Feb	30.4 °C	+2.8 °C	103 mm	-73 mm
Mar	28.8 °C	+2.0 °C	97 mm	-51 mm
Apr	25.3 °C	+0.1 °C	132 mm	+59 mm
May	24.3 °C	+1.2 °C	21 mm	-39 mm
Jun	22.5 °C	+0.3 °C	41 mm	-0 mm
Jul	21.4 °C	-0.7 °C	20 mm	-21 mm
Aug	24.0 °C	+0.3 °C	10 mm	-29 mm
Sep	26.2 °C	+1.3 °C	18 mm	-58 mm
Oct	25.6 °C	+0.2 °C	89 mm	-36 mm
Nov	26.5 °C	+0.8 °C	79 mm	-63 mm
Dec	29.7 °C	+3.2 °C	172 mm	-20 mm

The year's extremes

Hottest day

35.1 °C

26 Dec 2025

Coldest day

4.1 °C

25 Jun 2025

Wettest day

48.2 mm

17 Dec 2025

Windiest day

37.3 km/h

10 Dec 2025

Strongest gust

72.7 km/h

10 Dec 2025

Hottest feels-like

39.8 °C

28 Dec 2025

Coldest feels-like

1.0 °C

25 Jun 2025

Sunniest day

13.4 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 Jacareí?

Jacareí has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.9 °C and it receives 1,326 mm of precipitation per year.

What is the hottest day ever recorded in Jacareí?

The hottest day measured in Jacareí between 1940 and 2025 was 19 January 2015, reaching 36.9 °C.

What is the coldest day in Jacareí?

The coldest day measured in Jacareí between 1940 and 2025 was 12 July 1965, at 2.4 °C.

Does it snow in Jacareí?

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

Has the climate of Jacareí warmed?

Yes: Jacareí warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Jacareí?

The wettest day measured in Jacareí between 1940 and 2025 was 19 January 1977, with 101 mm of rain in 24 hours.

What was the windiest day in Jacareí?

The windiest day measured in Jacareí between 1940 and 2025 was 10 December 2025, with winds reaching 37.3 km/h.

What is the warmest month in Jacareí?

The warmest month in Jacareí is February (22.8 °C on average); the coldest is July (16.3 °C).

How much does it rain in Jacareí?

Jacareí receives on average 1,326 mm of precipitation per year, spread over about 163 rainy days.

Is it sunny in Jacareí?

Jacareí gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.

Are there tropical nights in Jacareí?

Yes: Jacareí has on average 30 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Jacareí?

In Jacareí, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 19 January 2015, and the lowest was -1.0 °C on 21 July 1981.

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