Batatais climate — normals and trends

Q: What is the climate of Batatais?

Batatais has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 21.8 °C and it receives 1,423 mm of precipitation per year.

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

The hottest day measured in Batatais between 1940 and 2025 was 18 October 1963, reaching 39.0 °C.

Q: What is the coldest day in Batatais?

The coldest day measured in Batatais between 1940 and 2025 was 1 June 1979, at 1.2 °C.

Q: Does it snow in Batatais?

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

Q: Has the climate of Batatais warmed?

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

Q: What is the wettest day in Batatais?

The wettest day measured in Batatais between 1940 and 2025 was 3 January 1961, with 170 mm of rain in 24 hours.

Q: What was the windiest day in Batatais?

The windiest day measured in Batatais between 1940 and 2025 was 30 October 1994, with winds reaching 30.6 km/h.

Q: What is the warmest month in Batatais?

The warmest month in Batatais is January (23.4 °C on average); the coldest is June (18.5 °C).

Q: How much does it rain in Batatais?

Batatais receives on average 1,423 mm of precipitation per year, spread over about 155 rainy days.

Q: Is it sunny in Batatais?

Batatais gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

Batatais (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 21.8 °C and it receives 1,423 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 (23.4 °C on average) and the coldest is June (18.5 °C). Rainfall peaks in December.

Batatais averages 0 frost days, 68 hot days (≥ 30 °C) and 155 rainy days per year.

Batatais has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.0 °C (on 18 October 1963) and the coldest 1.2 °C (on 1 June 1979).

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

BatataisSão Paulo

coords: -20.89°, -47.59°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthJanuaryColdest monthJuneWettest monthDecemberDriest monthJuly

Mean daily temperature

21.8°C

Average daily high

27.2°C

Average daily low

17.2°C

Annual rainfall

1,423mm

Sunshine / day

10.1h

Mean relative humidity

71%

Average peak wind

13.0km/h

Seasonal range

4.9°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

68 d/yr

Rainy days (≥ 1 mm)

155 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.2 °C

Average feels-like low

17.7 °C

Average peak gust

31.4 km/h

Tropical nights (≥ 20 °C)

63 d/yr

Solar radiation

18.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.63 · 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

39.0 °C

18 October 1963

Coldest day

1.2 °C

1 June 1979

Wettest day

170 mm

3 January 1961

Windiest day

30.6 km/h

30 October 1994

Strongest gust

82.1 km/h

30 July 1989

Hottest feels-like

40.9 °C

18 January 1995

Coldest feels-like

-2.4 °C

20 July 2021

Sunniest day

13.3 h

17 December 1942

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	35.2 °C6 October 2025	3.7 °C25 June 2025	22.2 °C	816 mm	126
2024	38.0 °C8 October 2024	2.8 °C11 August 2024	23.0 °C	1,144 mm	158
2023	37.9 °C14 November 2023	5.2 °C18 June 2023	22.4 °C	1,149 mm	125
2022	34.1 °C10 September 2022	3.0 °C20 May 2022	21.6 °C	1,136 mm	76
2021	36.9 °C21 September 2021	1.7 °C30 July 2021	22.1 °C	930 mm	108
2020	37.2 °C7 October 2020	5.4 °C28 May 2020	22.3 °C	1,171 mm	98
2019	36.0 °C12 September 2019	4.5 °C7 July 2019	22.8 °C	1,108 mm	123
2018	35.8 °C24 September 2018	5.8 °C21 May 2018	22.8 °C	1,092 mm	104
2017	36.3 °C14 October 2017	8.2 °C11 June 2017	22.8 °C	1,089 mm	130
2016	35.0 °C17 October 2016	5.7 °C13 June 2016	22.7 °C	1,429 mm	135
2015	37.5 °C16 October 2015	11.0 °C30 May 2015	23.1 °C	1,361 mm	120
2014	37.5 °C17 October 2014	9.0 °C20 July 2014	23.0 °C	874 mm	141
2013	35.1 °C28 September 2013	5.1 °C26 July 2013	22.0 °C	1,371 mm	83
2012	35.9 °C29 October 2012	6.2 °C19 July 2012	22.5 °C	1,282 mm	112
2011	35.0 °C30 September 2011	5.2 °C28 June 2011	22.3 °C	1,439 mm	91
2010	34.7 °C29 October 2010	7.3 °C7 June 2010	22.5 °C	1,124 mm	121
2009	33.5 °C18 September 2009	5.8 °C4 June 2009	22.2 °C	1,598 mm	73
2008	36.0 °C29 October 2008	9.1 °C15 July 2008	22.2 °C	1,316 mm	74
2007	35.9 °C23 September 2007	7.2 °C25 May 2007	22.8 °C	1,365 mm	107
2006	34.6 °C15 September 2006	9.1 °C28 June 2006	22.1 °C	1,418 mm	73
2005	35.5 °C17 October 2005	9.5 °C11 August 2005	22.4 °C	1,296 mm	88
2004	35.4 °C25 September 2004	7.6 °C28 May 2004	21.7 °C	1,586 mm	64
2003	35.8 °C25 September 2003	7.8 °C27 May 2003	22.2 °C	1,194 mm	77
2002	36.2 °C12 October 2002	5.7 °C9 July 2002	22.9 °C	1,127 mm	124
2001	35.0 °C10 September 2001	7.1 °C28 June 2001	22.2 °C	1,180 mm	101
2000	35.0 °C22 October 2000	3.2 °C18 July 2000	21.8 °C	1,550 mm	63
1999	35.3 °C16 October 1999	6.6 °C24 June 1999	21.9 °C	1,329 mm	82
1998	34.2 °C17 September 1998	8.7 °C8 June 1998	22.2 °C	1,405 mm	99
1997	35.3 °C12 October 1997	5.0 °C9 June 1997	21.9 °C	1,691 mm	93
1996	33.2 °C11 November 1996	5.7 °C13 July 1996	21.8 °C	1,717 mm	81
1995	34.0 °C11 September 1995	8.0 °C8 June 1995	22.0 °C	1,707 mm	94
1994	35.6 °C2 October 1994	1.2 °C27 June 1994	22.4 °C	1,433 mm	111
1993	33.8 °C30 November 1993	6.0 °C20 June 1993	21.8 °C	1,413 mm	64
1992	31.4 °C22 December 1992	10.0 °C14 August 1992	21.6 °C	1,580 mm	24
1991	32.8 °C30 October 1991	8.9 °C7 July 1991	21.9 °C	1,881 mm	55
1990	34.6 °C11 October 1990	4.8 °C19 May 1990	22.3 °C	1,168 mm	106
1989	32.5 °C24 September 1989	7.1 °C11 August 1989	21.4 °C	1,550 mm	44
1988	36.1 °C27 September 1988	3.8 °C6 June 1988	21.9 °C	1,355 mm	69
1987	35.5 °C18 October 1987	4.5 °C9 August 1987	22.2 °C	1,143 mm	85
1986	35.4 °C7 October 1986	6.4 °C2 June 1986	21.7 °C	1,410 mm	65
1985	36.6 °C17 November 1985	2.7 °C9 June 1985	21.8 °C	1,294 mm	80
1984	34.4 °C14 January 1984	7.7 °C27 August 1984	22.4 °C	1,245 mm	82
1983	31.8 °C16 February 1983	7.3 °C4 August 1983	21.6 °C	2,105 mm	28
1982	32.7 °C4 November 1982	9.7 °C28 May 1982	21.6 °C	1,820 mm	46
1981	34.0 °C28 September 1981	1.2 °C22 July 1981	21.6 °C	1,233 mm	58
1980	36.1 °C28 October 1980	5.7 °C15 June 1980	22.0 °C	1,194 mm	63
1979	34.1 °C7 December 1979	1.2 °C1 June 1979	21.4 °C	1,384 mm	51
1978	33.1 °C6 October 1978	3.9 °C16 August 1978	21.6 °C	1,277 mm	59
1977	33.3 °C28 February 1977	5.3 °C18 May 1977	22.0 °C	1,287 mm	77
1976	32.9 °C19 January 1976	5.5 °C6 July 1976	20.9 °C	1,694 mm	25
1975	33.5 °C8 September 1975	5.3 °C18 July 1975	21.6 °C	1,245 mm	74
1974	34.3 °C19 November 1974	8.3 °C17 August 1974	21.6 °C	1,466 mm	77
1973	34.2 °C18 September 1973	4.2 °C20 June 1973	22.0 °C	1,301 mm	75
1972	34.6 °C26 October 1972	5.7 °C9 July 1972	21.5 °C	1,468 mm	37
1971	33.7 °C3 February 1971	6.7 °C2 June 1971	21.3 °C	1,304 mm	49
1970	33.7 °C24 December 1970	9.3 °C15 July 1970	21.7 °C	929 mm	54
1969	34.9 °C11 September 1969	3.5 °C11 July 1969	22.3 °C	870 mm	98
1968	35.8 °C8 October 1968	5.2 °C18 May 1968	21.2 °C	866 mm	61
1967	34.5 °C6 September 1967	6.3 °C9 June 1967	21.7 °C	1,335 mm	62
1966	34.5 °C16 September 1966	8.8 °C5 June 1966	21.2 °C	1,506 mm	29
1965	33.8 °C5 September 1965	1.6 °C12 July 1965	20.7 °C	1,962 mm	26
1964	33.3 °C2 September 1964	5.3 °C28 July 1964	20.5 °C	1,839 mm	18
1963	39.0 °C18 October 1963	6.1 °C22 June 1963	22.6 °C	963 mm	99
1962	33.4 °C11 September 1962	5.2 °C18 July 1962	20.4 °C	2,111 mm	24
1961	37.9 °C28 September 1961	8.8 °C29 May 1961	22.3 °C	1,614 mm	79
1960	37.0 °C25 September 1960	6.8 °C10 July 1960	20.9 °C	1,834 mm	29
1959	33.9 °C4 October 1959	5.3 °C8 June 1959	21.7 °C	1,370 mm	62
1958	33.8 °C8 December 1958	8.3 °C30 May 1958	21.4 °C	1,174 mm	71
1957	36.1 °C20 October 1957	3.8 °C22 July 1957	21.1 °C	1,510 mm	39
1956	33.2 °C8 October 1956	6.0 °C6 June 1956	20.5 °C	1,292 mm	51
1955	36.6 °C17 September 1955	6.1 °C23 May 1955	21.6 °C	1,255 mm	59
1954	34.9 °C19 September 1954	6.2 °C21 June 1954	21.4 °C	1,721 mm	39
1953	32.4 °C21 August 1953	8.9 °C6 July 1953	21.3 °C	1,843 mm	10
1952	33.8 °C4 September 1952	5.9 °C16 July 1952	20.8 °C	1,596 mm	24
1951	33.6 °C26 September 1951	10.0 °C22 April 1951	21.0 °C	1,262 mm	35
1950	34.1 °C19 September 1950	7.0 °C11 June 1950	20.8 °C	1,847 mm	31
1949	34.6 °C13 October 1949	8.9 °C18 May 1949	21.1 °C	1,732 mm	28
1948	36.1 °C27 September 1948	7.0 °C16 June 1948	21.5 °C	1,247 mm	35
1947	32.1 °C21 January 1947	6.6 °C8 July 1947	20.5 °C	1,803 mm	13
1946	32.1 °C8 September 1946	5.5 °C27 July 1946	21.0 °C	1,608 mm	17
1945	32.2 °C29 September 1945	9.1 °C26 June 1945	20.8 °C	2,248 mm	19
1944	34.7 °C7 September 1944	8.1 °C9 June 1944	21.2 °C	1,793 mm	27
1943	29.4 °C18 January 1943	8.1 °C27 June 1943	20.0 °C	1,570 mm	0
1942	37.4 °C28 November 1942	4.0 °C19 June 1942	20.7 °C	1,190 mm	61
1941	30.9 °C26 October 1941	7.9 °C30 May 1941	20.8 °C	2,242 mm	8
1940	32.7 °C23 August 1940	8.2 °C19 August 1940	21.0 °C	1,970 mm	10

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

28.5 °C

+1.3 °C

Hot days (≥ 30 °C)

126 d/yr

+58

Frost days (< 0 °C)

0 d/yr

Annual rainfall

816 mm

-607 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.7 °C	+1.8 °C	108 mm	-133 mm
Feb	30.2 °C	+2.0 °C	106 mm	-91 mm
Mar	30.4 °C	+2.5 °C	88 mm	-75 mm
Apr	27.4 °C	+0.4 °C	100 mm	+22 mm
May	26.3 °C	+1.2 °C	4 mm	-43 mm
Jun	25.4 °C	+0.9 °C	25 mm	-3 mm
Jul	25.5 °C	+0.6 °C	6 mm	-16 mm
Aug	27.9 °C	+0.6 °C	6 mm	-16 mm
Sep	30.8 °C	+1.7 °C	19 mm	-41 mm
Oct	29.4 °C	+0.6 °C	100 mm	-38 mm
Nov	29.6 °C	+1.5 °C	97 mm	-85 mm
Dec	29.7 °C	+2.0 °C	159 mm	-89 mm

The year's extremes

Hottest day

35.2 °C

6 Oct 2025

Coldest day

3.7 °C

25 Jun 2025

Wettest day

28.7 mm

13 Dec 2025

Windiest day

26.8 km/h

9 Sep 2025

Strongest gust

66.2 km/h

22 Sep 2025

Hottest feels-like

39.2 °C

26 Dec 2025

Coldest feels-like

0.8 °C

25 Jun 2025

Sunniest day

13.2 h

5 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 Batatais?

Batatais has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 21.8 °C and it receives 1,423 mm of precipitation per year.

What is the hottest day ever recorded in Batatais?

The hottest day measured in Batatais between 1940 and 2025 was 18 October 1963, reaching 39.0 °C.

What is the coldest day in Batatais?

The coldest day measured in Batatais between 1940 and 2025 was 1 June 1979, at 1.2 °C.

Does it snow in Batatais?

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

Has the climate of Batatais warmed?

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

What is the wettest day in Batatais?

The wettest day measured in Batatais between 1940 and 2025 was 3 January 1961, with 170 mm of rain in 24 hours.

What was the windiest day in Batatais?

The windiest day measured in Batatais between 1940 and 2025 was 30 October 1994, with winds reaching 30.6 km/h.

What is the warmest month in Batatais?

The warmest month in Batatais is January (23.4 °C on average); the coldest is June (18.5 °C).

How much does it rain in Batatais?

Batatais receives on average 1,423 mm of precipitation per year, spread over about 155 rainy days.

Is it sunny in Batatais?

Batatais gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

Are there tropical nights in Batatais?

Yes: Batatais has on average 63 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Batatais?

In Batatais, between 1940 and 2025, the highest apparent temperature reached 40.9 °C on 18 January 1995, and the lowest was -2.4 °C on 20 July 2021.

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