Piraí climate — normals and trends

Q: What is the climate of Piraí?

Piraí has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 1,813 mm of precipitation per year.

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

The hottest day measured in Piraí between 1940 and 2025 was 28 September 1961, reaching 38.8 °C.

Q: What is the coldest day in Piraí?

The coldest day measured in Piraí between 1940 and 2025 was 6 June 1988, at 7.0 °C.

Q: Does it snow in Piraí?

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

Q: Has the climate of Piraí warmed?

Yes: Piraí warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Piraí?

The wettest day measured in Piraí between 1940 and 2025 was 11 March 1954, with 218 mm of rain in 24 hours.

Q: What was the windiest day in Piraí?

The windiest day measured in Piraí between 1940 and 2025 was 17 December 1989, with winds reaching 25.9 km/h.

Q: What is the warmest month in Piraí?

The warmest month in Piraí is February (24.6 °C on average); the coldest is July (18.3 °C).

Q: How much does it rain in Piraí?

Piraí receives on average 1,813 mm of precipitation per year, spread over about 194 rainy days.

Q: Is it sunny in Piraí?

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

Piraí (Brazil) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 21.5 °C and it receives 1,813 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 (24.6 °C on average) and the coldest is July (18.3 °C). Rainfall peaks in January.

Piraí averages 0 frost days, 62 hot days (≥ 30 °C) and 194 rainy days per year.

Piraí has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.8 °C (on 28 September 1961) and the coldest 7.0 °C (on 6 June 1988).

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

PiraíRio de Janeiro

coords: -22.63°, -43.90°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthFebruaryColdest monthJulyWettest monthJanuaryDriest monthJuly

Mean daily temperature

21.5°C

Average daily high

26.0°C

Average daily low

18.2°C

Annual rainfall

1,813mm

Sunshine / day

9.1h

Mean relative humidity

81%

Average peak wind

10.2km/h

Seasonal range

6.3°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

62 d/yr

Rainy days (≥ 1 mm)

194 d/yr

Annual snowfall

0.0 cm

Average feels-like high

28.9 °C

Average feels-like low

19.9 °C

Average peak gust

29.7 km/h

Tropical nights (≥ 20 °C)

120 d/yr

Solar radiation

16.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.56 · 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

38.8 °C

28 September 1961

Coldest day

7.0 °C

6 June 1988

Wettest day

218 mm

11 March 1954

Windiest day

25.9 km/h

17 December 1989

Strongest gust

77.0 km/h

24 January 1992

Hottest feels-like

44.6 °C

17 February 1994

Coldest feels-like

5.4 °C

1 June 1979

Sunniest day

13.4 h

28 December 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	36.1 °C17 February 2025	10.4 °C30 July 2025	21.8 °C	1,134 mm	79
2024	36.1 °C2 October 2024	9.4 °C14 August 2024	22.6 °C	1,497 mm	103
2023	38.5 °C18 November 2023	10.4 °C4 July 2023	22.4 °C	1,634 mm	102
2022	34.8 °C10 September 2022	9.7 °C16 June 2022	21.4 °C	1,886 mm	68
2021	35.6 °C14 September 2021	7.6 °C31 July 2021	21.3 °C	1,617 mm	69
2020	37.7 °C2 October 2020	9.7 °C27 May 2020	21.8 °C	1,779 mm	64
2019	35.9 °C18 September 2019	9.9 °C12 July 2019	22.6 °C	1,597 mm	99
2018	35.4 °C18 January 2018	10.2 °C22 May 2018	22.4 °C	1,585 mm	80
2017	34.4 °C19 October 2017	11.1 °C11 June 2017	22.2 °C	1,497 mm	90
2016	35.1 °C31 January 2016	8.4 °C15 June 2016	22.2 °C	1,616 mm	108
2015	36.9 °C24 September 2015	12.5 °C27 June 2015	22.9 °C	1,588 mm	105
2014	35.6 °C3 January 2014	10.3 °C8 August 2014	22.5 °C	1,053 mm	111
2013	36.3 °C12 November 2013	10.0 °C29 August 2013	21.7 °C	2,060 mm	75
2012	37.1 °C19 September 2012	10.7 °C27 September 2012	22.1 °C	1,432 mm	85
2011	34.6 °C10 February 2011	8.9 °C6 June 2011	21.5 °C	1,523 mm	82
2010	36.5 °C8 February 2010	10.1 °C8 June 2010	22.2 °C	1,717 mm	108
2009	34.9 °C19 November 2009	8.8 °C4 June 2009	22.1 °C	2,113 mm	75
2008	34.0 °C26 October 2008	9.9 °C15 July 2008	21.4 °C	2,096 mm	67
2007	35.4 °C30 December 2007	8.8 °C30 July 2007	22.2 °C	1,475 mm	86
2006	36.4 °C25 January 2006	10.8 °C6 September 2006	22.0 °C	1,579 mm	83
2005	37.1 °C14 October 2005	11.5 °C9 July 2005	22.2 °C	1,982 mm	73
2004	34.8 °C31 October 2004	11.4 °C24 July 2004	21.6 °C	1,752 mm	53
2003	36.6 °C16 December 2003	10.9 °C19 August 2003	22.2 °C	1,697 mm	85
2002	35.4 °C1 December 2002	11.0 °C3 September 2002	22.7 °C	1,473 mm	94
2001	33.5 °C8 January 2001	11.8 °C30 July 2001	22.2 °C	1,519 mm	86
2000	34.2 °C15 January 2000	7.1 °C18 July 2000	21.6 °C	1,553 mm	74
1999	35.7 °C2 February 1999	10.0 °C16 August 1999	21.1 °C	1,792 mm	54
1998	36.0 °C31 January 1998	10.9 °C10 June 1998	22.0 °C	1,840 mm	82
1997	35.8 °C9 September 1997	9.6 °C11 August 1997	22.1 °C	1,560 mm	102
1996	35.3 °C27 January 1996	9.4 °C3 August 1996	21.5 °C	2,198 mm	89
1995	36.4 °C17 January 1995	11.4 °C7 June 1995	22.1 °C	2,018 mm	89
1994	35.4 °C17 February 1994	7.2 °C27 June 1994	22.3 °C	1,866 mm	97
1993	36.0 °C7 September 1993	9.8 °C13 August 1993	22.2 °C	1,590 mm	96
1992	35.4 °C22 February 1992	10.4 °C25 August 1992	22.0 °C	1,747 mm	72
1991	33.6 °C26 November 1991	11.1 °C17 August 1991	21.8 °C	1,686 mm	56
1990	34.1 °C15 November 1990	10.0 °C24 June 1990	22.0 °C	1,722 mm	68
1989	33.3 °C24 September 1989	9.4 °C20 July 1989	21.5 °C	1,841 mm	37
1988	34.2 °C13 January 1988	7.0 °C6 June 1988	21.6 °C	1,939 mm	60
1987	33.8 °C9 January 1987	9.5 °C26 June 1987	22.0 °C	1,644 mm	72
1986	34.1 °C7 October 1986	10.0 °C13 July 1986	22.1 °C	1,845 mm	66
1985	33.4 °C20 February 1985	9.0 °C9 June 1985	21.5 °C	1,842 mm	43
1984	34.9 °C13 January 1984	10.2 °C27 August 1984	22.1 °C	1,449 mm	58
1983	33.7 °C17 February 1983	9.1 °C6 August 1983	21.7 °C	2,399 mm	46
1982	33.6 °C6 November 1982	11.5 °C9 September 1982	21.6 °C	1,954 mm	40
1981	34.5 °C20 September 1981	9.2 °C22 July 1981	21.3 °C	1,915 mm	52
1980	34.5 °C27 October 1980	10.2 °C18 June 1980	21.8 °C	1,697 mm	61
1979	33.2 °C25 October 1979	7.1 °C1 June 1979	21.1 °C	2,019 mm	42
1978	35.3 °C31 January 1978	8.4 °C16 August 1978	21.5 °C	1,690 mm	53
1977	35.2 °C28 February 1977	12.2 °C18 May 1977	22.2 °C	1,605 mm	71
1976	34.4 °C25 January 1976	10.1 °C6 July 1976	21.2 °C	2,167 mm	48
1975	33.7 °C9 December 1975	7.4 °C8 July 1975	21.2 °C	2,027 mm	50
1974	34.5 °C26 September 1974	9.6 °C16 June 1974	21.4 °C	1,721 mm	48
1973	35.8 °C11 February 1973	9.9 °C22 June 1973	21.9 °C	1,927 mm	59
1972	34.5 °C27 October 1972	10.0 °C23 June 1972	21.7 °C	1,798 mm	55
1971	33.9 °C24 January 1971	10.5 °C20 July 1971	21.3 °C	1,677 mm	57
1970	33.3 °C9 December 1970	10.8 °C12 August 1970	21.2 °C	1,342 mm	42
1969	34.5 °C15 February 1969	11.1 °C27 July 1969	21.4 °C	1,653 mm	50
1968	35.2 °C24 December 1968	10.3 °C1 June 1968	20.4 °C	1,276 mm	38
1967	33.1 °C14 January 1967	10.5 °C10 June 1967	21.6 °C	2,108 mm	40
1966	33.5 °C22 January 1966	10.3 °C23 September 1966	21.0 °C	2,244 mm	63
1965	33.4 °C10 September 1965	10.2 °C11 July 1965	20.9 °C	2,469 mm	36
1964	32.9 °C18 February 1964	8.2 °C29 July 1964	20.1 °C	1,968 mm	24
1963	35.7 °C14 October 1963	10.6 °C23 June 1963	21.3 °C	1,585 mm	73
1962	32.3 °C8 September 1962	9.3 °C18 June 1962	20.0 °C	2,301 mm	16
1961	38.8 °C28 September 1961	12.3 °C19 June 1961	21.8 °C	2,025 mm	80
1960	34.4 °C25 September 1960	9.6 °C15 July 1960	20.5 °C	1,970 mm	29
1959	33.6 °C7 September 1959	10.8 °C13 June 1959	21.3 °C	1,611 mm	61
1958	34.3 °C15 November 1958	9.3 °C22 June 1958	21.2 °C	1,994 mm	57
1957	34.4 °C19 October 1957	9.3 °C23 July 1957	20.8 °C	1,934 mm	27
1956	35.0 °C2 February 1956	10.1 °C13 July 1956	20.2 °C	1,501 mm	59
1955	34.3 °C1 September 1955	9.6 °C14 July 1955	20.7 °C	1,265 mm	64
1954	34.3 °C18 September 1954	10.5 °C30 August 1954	21.1 °C	2,322 mm	49
1953	33.3 °C30 January 1953	10.5 °C29 July 1953	21.1 °C	1,893 mm	46
1952	33.4 °C30 September 1952	10.6 °C16 July 1952	20.8 °C	1,933 mm	20
1951	35.7 °C23 November 1951	10.9 °C4 June 1951	20.6 °C	1,691 mm	56
1950	33.1 °C19 February 1950	9.6 °C14 July 1950	20.7 °C	2,015 mm	36
1949	32.5 °C18 March 1949	10.9 °C3 July 1949	20.3 °C	2,123 mm	25
1948	36.8 °C27 September 1948	10.9 °C30 August 1948	20.9 °C	1,644 mm	57
1947	34.5 °C8 January 1947	8.3 °C4 August 1947	20.4 °C	2,096 mm	32
1946	33.1 °C19 October 1946	10.9 °C30 July 1946	21.4 °C	2,312 mm	52
1945	33.1 °C13 November 1945	10.5 °C14 July 1945	21.2 °C	2,191 mm	38
1944	34.9 °C7 September 1944	9.9 °C13 July 1944	21.0 °C	2,108 mm	31
1943	32.1 °C19 January 1943	9.9 °C5 September 1943	19.9 °C	1,869 mm	17
1942	35.9 °C6 October 1942	8.2 °C26 June 1942	20.3 °C	1,668 mm	39
1941	34.5 °C12 January 1941	10.9 °C15 September 1941	21.1 °C	2,532 mm	35
1940	34.1 °C12 September 1940	11.3 °C28 September 1940	21.3 °C	2,645 mm	32

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

26.5 °C

+0.5 °C

Hot days (≥ 30 °C)

79 d/yr

+17

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1134 mm

-679 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.0 °C	+0.4 °C	247 mm	-51 mm
Feb	32.0 °C	+3.0 °C	51 mm	-191 mm
Mar	28.7 °C	+0.8 °C	135 mm	-103 mm
Apr	26.0 °C	-0.1 °C	166 mm	+31 mm
May	25.2 °C	+0.9 °C	47 mm	-27 mm
Jun	24.0 °C	+0.5 °C	31 mm	-13 mm
Jul	22.0 °C	-1.3 °C	23 mm	-20 mm
Aug	24.2 °C	-0.3 °C	13 mm	-34 mm
Sep	25.4 °C	+0.1 °C	53 mm	-32 mm
Oct	25.9 °C	+0.1 °C	128 mm	-13 mm
Nov	26.1 °C	0.0 °C	100 mm	-102 mm
Dec	29.6 °C	+2.3 °C	142 mm	-126 mm

The year's extremes

Hottest day

36.1 °C

17 Feb 2025

Coldest day

10.4 °C

30 Jul 2025

Wettest day

44.4 mm

5 Apr 2025

Windiest day

22.2 km/h

22 Sep 2025

Strongest gust

63.7 km/h

22 Sep 2025

Hottest feels-like

41.1 °C

19 Jan 2025

Coldest feels-like

9.5 °C

30 Jul 2025

Sunniest day

13.4 h

22 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 Piraí?

Piraí has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 1,813 mm of precipitation per year.

What is the hottest day ever recorded in Piraí?

The hottest day measured in Piraí between 1940 and 2025 was 28 September 1961, reaching 38.8 °C.

What is the coldest day in Piraí?

The coldest day measured in Piraí between 1940 and 2025 was 6 June 1988, at 7.0 °C.

Does it snow in Piraí?

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

Has the climate of Piraí warmed?

Yes: Piraí warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Piraí?

The wettest day measured in Piraí between 1940 and 2025 was 11 March 1954, with 218 mm of rain in 24 hours.

What was the windiest day in Piraí?

The windiest day measured in Piraí between 1940 and 2025 was 17 December 1989, with winds reaching 25.9 km/h.

What is the warmest month in Piraí?

The warmest month in Piraí is February (24.6 °C on average); the coldest is July (18.3 °C).

How much does it rain in Piraí?

Piraí receives on average 1,813 mm of precipitation per year, spread over about 194 rainy days.

Is it sunny in Piraí?

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

Are there tropical nights in Piraí?

Yes: Piraí has on average 120 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Piraí?

In Piraí, between 1940 and 2025, the highest apparent temperature reached 44.6 °C on 17 February 1994, and the lowest was 5.4 °C on 1 June 1979.

Compare Piraí with another city

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

Nearby cities

The climate around Piraí

Other cities — Brazil

All cities in Brazil →