Piraju climate — normals and trends

Q: What is the climate of Piraju?

Piraju has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 21.0 °C and it receives 1,348 mm of precipitation per year.

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

The hottest day measured in Piraju between 1940 and 2025 was 6 October 2020, reaching 39.3 °C.

Q: What is the coldest day in Piraju?

The coldest day measured in Piraju between 1940 and 2025 was 18 July 1975, at 0.8 °C.

Q: Does it snow in Piraju?

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

Q: Has the climate of Piraju warmed?

Yes: Piraju warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Piraju?

The wettest day measured in Piraju between 1940 and 2025 was 17 January 2017, with 122 mm of rain in 24 hours.

Q: What was the windiest day in Piraju?

The windiest day measured in Piraju between 1940 and 2025 was 28 November 1950, with winds reaching 35.6 km/h.

Q: What is the warmest month in Piraju?

The warmest month in Piraju is February (23.8 °C on average); the coldest is July (17.3 °C).

Q: How much does it rain in Piraju?

Piraju receives on average 1,348 mm of precipitation per year, spread over about 144 rainy days.

Q: Is it sunny in Piraju?

Piraju gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.

Piraju (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 21.0 °C and it receives 1,348 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 (23.8 °C on average) and the coldest is July (17.3 °C). Rainfall peaks in January.

Piraju averages 0 frost days, 58 hot days (≥ 30 °C) and 144 rainy days per year.

Piraju has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.3 °C (on 6 October 2020) and the coldest 0.8 °C (on 18 July 1975).

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

PirajuSão Paulo

coords: -23.19°, -49.38°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthFebruaryColdest monthJulyWettest monthJanuaryDriest monthAugust

Mean daily temperature

21.0°C

Average daily high

26.1°C

Average daily low

17.0°C

Annual rainfall

1,348mm

Sunshine / day

9.5h

Mean relative humidity

77%

Average peak wind

14.8km/h

Seasonal range

6.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

58 d/yr

Rainy days (≥ 1 mm)

144 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.9 °C

Average feels-like low

17.4 °C

Average peak gust

34.2 km/h

Tropical nights (≥ 20 °C)

82 d/yr

Solar radiation

17.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.8 °C

since 1940

+0.2 °C per decade · r² = 0.57 · 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

6 October 2020

Coldest day

0.8 °C

18 July 1975

Wettest day

122 mm

17 January 2017

Windiest day

35.6 km/h

28 November 1950

Strongest gust

92.5 km/h

16 October 1950

Hottest feels-like

41.8 °C

30 October 2012

Coldest feels-like

-3.8 °C

18 July 1975

Sunniest day

13.4 h

16 December 1942

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.7 °C5 October 2025	6.3 °C25 June 2025	21.3 °C	995 mm	86
2024	36.9 °C26 September 2024	7.2 °C29 May 2024	22.6 °C	1,102 mm	132
2023	37.7 °C12 November 2023	7.9 °C15 July 2023	21.9 °C	1,287 mm	99
2022	34.0 °C24 January 2022	5.8 °C18 May 2022	20.8 °C	1,318 mm	59
2021	35.9 °C20 September 2021	3.9 °C19 July 2021	21.3 °C	928 mm	89
2020	39.3 °C6 October 2020	6.3 °C22 August 2020	21.6 °C	965 mm	90
2019	37.3 °C2 October 2019	4.2 °C6 July 2019	22.4 °C	913 mm	114
2018	35.0 °C12 December 2018	7.8 °C12 July 2018	21.9 °C	926 mm	89
2017	35.9 °C12 October 2017	6.4 °C19 July 2017	21.8 °C	1,462 mm	100
2016	35.7 °C17 October 2016	7.0 °C13 June 2016	21.9 °C	1,413 mm	124
2015	37.3 °C24 September 2015	9.9 °C16 June 2015	22.3 °C	1,561 mm	91
2014	38.3 °C5 February 2014	9.5 °C6 August 2014	22.1 °C	1,024 mm	117
2013	34.6 °C4 December 2013	4.4 °C24 July 2013	21.3 °C	1,412 mm	82
2012	36.7 °C31 October 2012	9.2 °C27 September 2012	22.0 °C	1,402 mm	112
2011	36.2 °C30 September 2011	6.0 °C27 June 2011	21.3 °C	1,249 mm	89
2010	35.0 °C12 March 2010	7.4 °C16 August 2010	21.3 °C	1,472 mm	85
2009	35.8 °C6 March 2009	6.4 °C3 June 2009	21.5 °C	1,564 mm	68
2008	34.9 °C14 October 2008	6.2 °C17 June 2008	21.1 °C	1,211 mm	55
2007	35.8 °C23 September 2007	7.1 °C26 July 2007	22.0 °C	1,283 mm	99
2006	34.6 °C17 January 2006	6.0 °C6 September 2006	21.6 °C	926 mm	82
2005	35.3 °C23 February 2005	9.6 °C26 July 2005	21.6 °C	1,393 mm	72
2004	37.1 °C26 September 2004	7.3 °C14 June 2004	21.0 °C	1,275 mm	58
2003	34.1 °C1 March 2003	7.8 °C11 August 2003	21.3 °C	1,206 mm	71
2002	36.7 °C11 October 2002	7.2 °C3 September 2002	22.3 °C	1,009 mm	121
2001	34.6 °C7 November 2001	5.1 °C21 June 2001	21.4 °C	1,300 mm	81
2000	36.3 °C23 October 2000	3.7 °C17 July 2000	21.1 °C	1,358 mm	70
1999	35.7 °C21 January 1999	6.4 °C15 August 1999	20.9 °C	1,344 mm	79
1998	35.7 °C3 December 1998	9.5 °C10 July 1998	21.2 °C	1,785 mm	75
1997	34.9 °C10 November 1997	6.6 °C8 June 1997	21.2 °C	1,960 mm	81
1996	35.1 °C30 January 1996	7.6 °C22 July 1996	20.9 °C	1,462 mm	63
1995	35.4 °C11 September 1995	10.0 °C5 August 1995	21.4 °C	1,560 mm	77
1994	36.2 °C13 October 1994	2.7 °C26 June 1994	21.5 °C	1,340 mm	79
1993	35.0 °C2 January 1993	4.3 °C1 August 1993	21.1 °C	1,616 mm	60
1992	32.3 °C13 November 1992	8.3 °C3 August 1992	20.8 °C	1,493 mm	45
1991	33.6 °C15 October 1991	4.5 °C3 August 1991	21.0 °C	1,567 mm	52
1990	34.3 °C12 March 1990	5.5 °C29 July 1990	21.1 °C	1,435 mm	112
1989	32.9 °C25 October 1989	7.6 °C6 July 1989	20.4 °C	1,611 mm	31
1988	35.4 °C27 September 1988	4.9 °C5 June 1988	20.8 °C	1,310 mm	76
1987	33.5 °C15 September 1987	5.4 °C8 August 1987	21.1 °C	1,377 mm	76
1986	34.4 °C1 November 1986	9.1 °C1 June 1986	21.2 °C	1,333 mm	61
1985	38.7 °C17 November 1985	5.1 °C8 June 1985	21.2 °C	1,006 mm	84
1984	35.0 °C17 January 1984	5.9 °C27 August 1984	21.6 °C	1,145 mm	76
1983	32.4 °C30 August 1983	7.6 °C6 August 1983	21.0 °C	1,949 mm	36
1982	32.8 °C13 February 1982	8.3 °C31 July 1982	20.9 °C	1,653 mm	35
1981	33.8 °C28 September 1981	4.0 °C21 July 1981	20.7 °C	1,257 mm	44
1980	33.7 °C20 October 1980	5.2 °C28 June 1980	20.8 °C	1,520 mm	37
1979	34.2 °C7 February 1979	3.9 °C1 June 1979	20.2 °C	1,149 mm	40
1978	34.4 °C30 January 1978	4.3 °C15 August 1978	20.9 °C	1,093 mm	60
1977	34.8 °C11 March 1977	6.4 °C17 May 1977	21.7 °C	1,246 mm	78
1976	34.7 °C19 January 1976	7.0 °C11 July 1976	20.1 °C	1,908 mm	28
1975	34.5 °C9 September 1975	0.8 °C18 July 1975	20.9 °C	1,138 mm	65
1974	34.2 °C19 November 1974	6.2 °C17 August 1974	20.5 °C	1,684 mm	56
1973	34.8 °C22 February 1973	7.7 °C13 May 1973	21.0 °C	1,348 mm	64
1972	34.8 °C26 October 1972	4.3 °C9 July 1972	20.9 °C	1,586 mm	36
1971	34.6 °C26 January 1971	7.7 °C6 July 1971	20.6 °C	1,063 mm	51
1970	33.6 °C8 December 1970	7.0 °C3 July 1970	20.8 °C	1,240 mm	38
1969	33.6 °C9 January 1969	3.7 °C10 July 1969	21.2 °C	870 mm	79
1968	34.9 °C7 October 1968	5.4 °C17 May 1968	20.2 °C	933 mm	60
1967	33.9 °C8 October 1967	5.4 °C9 June 1967	21.1 °C	1,183 mm	61
1966	33.7 °C13 September 1966	4.0 °C6 August 1966	20.2 °C	1,266 mm	24
1965	32.5 °C3 September 1965	4.7 °C21 August 1965	20.0 °C	1,552 mm	10
1964	31.2 °C14 March 1964	7.5 °C28 July 1964	19.6 °C	1,351 mm	9
1963	37.4 °C17 October 1963	6.8 °C21 June 1963	21.3 °C	1,140 mm	63
1962	32.8 °C8 September 1962	5.8 °C18 July 1962	19.3 °C	1,339 mm	15
1961	37.6 °C27 September 1961	9.7 °C17 June 1961	21.5 °C	1,085 mm	61
1960	35.4 °C24 September 1960	7.8 °C9 July 1960	19.9 °C	1,333 mm	16
1959	34.1 °C10 September 1959	7.9 °C9 June 1959	21.1 °C	1,126 mm	43
1958	33.1 °C5 January 1958	8.6 °C24 June 1958	20.6 °C	1,452 mm	40
1957	34.3 °C19 October 1957	6.2 °C21 July 1957	20.1 °C	1,595 mm	15
1956	33.7 °C8 October 1956	8.2 °C8 July 1956	19.7 °C	1,273 mm	33
1955	35.7 °C1 October 1955	5.9 °C1 August 1955	20.2 °C	1,222 mm	36
1954	34.0 °C19 September 1954	7.8 °C22 June 1954	20.7 °C	1,124 mm	21
1953	32.2 °C20 August 1953	10.3 °C12 July 1953	20.6 °C	1,302 mm	10
1952	33.2 °C30 September 1952	8.6 °C17 July 1952	20.4 °C	1,196 mm	22
1951	33.2 °C25 September 1951	9.1 °C30 June 1951	20.3 °C	1,220 mm	27
1950	33.5 °C17 September 1950	7.2 °C12 July 1950	20.2 °C	1,590 mm	16
1949	30.8 °C18 March 1949	8.5 °C16 August 1949	19.9 °C	1,959 mm	4
1948	35.3 °C26 September 1948	8.4 °C3 August 1948	20.4 °C	1,392 mm	19
1947	32.0 °C20 January 1947	8.5 °C4 August 1947	19.7 °C	1,910 mm	11
1946	30.5 °C18 October 1946	8.9 °C18 July 1946	20.5 °C	2,077 mm	1
1945	31.5 °C28 September 1945	10.1 °C11 July 1945	20.2 °C	1,911 mm	3
1944	34.8 °C6 September 1944	10.1 °C11 July 1944	21.0 °C	1,215 mm	31
1943	32.7 °C17 January 1943	8.4 °C30 August 1943	19.9 °C	900 mm	28
1942	38.6 °C27 November 1942	6.3 °C19 June 1942	20.6 °C	889 mm	65
1941	30.9 °C9 January 1941	7.3 °C19 July 1941	20.1 °C	1,802 mm	4
1940	31.3 °C23 August 1940	8.9 °C17 August 1940	20.5 °C	1,621 mm	2

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

26.7 °C

+0.6 °C

Hot days (≥ 30 °C)

86 d/yr

+28

Frost days (< 0 °C)

0 d/yr

Annual rainfall

995 mm

-353 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.6 °C	+1.3 °C	188 mm	-19 mm
Feb	30.5 °C	+2.2 °C	100 mm	-78 mm
Mar	29.6 °C	+1.7 °C	71 mm	-58 mm
Apr	25.9 °C	-0.3 °C	115 mm	+46 mm
May	24.9 °C	+1.3 °C	17 mm	-60 mm
Jun	22.2 °C	-0.4 °C	85 mm	+20 mm
Jul	21.6 °C	-1.1 °C	4 mm	-46 mm
Aug	24.9 °C	0.0 °C	2 mm	-44 mm
Sep	28.2 °C	+1.9 °C	30 mm	-54 mm
Oct	26.5 °C	-0.3 °C	88 mm	-42 mm
Nov	27.2 °C	-0.2 °C	119 mm	-14 mm
Dec	29.4 °C	+1.6 °C	176 mm	-4 mm

The year's extremes

Hottest day

34.7 °C

5 Oct 2025

Coldest day

6.3 °C

25 Jun 2025

Wettest day

61.2 mm

9 Dec 2025

Windiest day

34.2 km/h

10 Dec 2025

Strongest gust

88.9 km/h

22 Sep 2025

Hottest feels-like

39.4 °C

26 Dec 2025

Coldest feels-like

3.2 °C

24 Jun 2025

Sunniest day

13.3 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 Piraju?

Piraju has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 21.0 °C and it receives 1,348 mm of precipitation per year.

What is the hottest day ever recorded in Piraju?

The hottest day measured in Piraju between 1940 and 2025 was 6 October 2020, reaching 39.3 °C.

What is the coldest day in Piraju?

The coldest day measured in Piraju between 1940 and 2025 was 18 July 1975, at 0.8 °C.

Does it snow in Piraju?

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

Has the climate of Piraju warmed?

Yes: Piraju warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Piraju?

The wettest day measured in Piraju between 1940 and 2025 was 17 January 2017, with 122 mm of rain in 24 hours.

What was the windiest day in Piraju?

The windiest day measured in Piraju between 1940 and 2025 was 28 November 1950, with winds reaching 35.6 km/h.

What is the warmest month in Piraju?

The warmest month in Piraju is February (23.8 °C on average); the coldest is July (17.3 °C).

How much does it rain in Piraju?

Piraju receives on average 1,348 mm of precipitation per year, spread over about 144 rainy days.

Is it sunny in Piraju?

Piraju gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.

Are there tropical nights in Piraju?

Yes: Piraju has on average 82 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Piraju?

In Piraju, between 1940 and 2025, the highest apparent temperature reached 41.8 °C on 30 October 2012, and the lowest was -3.8 °C on 18 July 1975.

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