Sumidouro climate — normals and trends

Q: What is the climate of Sumidouro?

Sumidouro has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 20.2 °C and it receives 1,472 mm of precipitation per year.

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

The hottest day measured in Sumidouro between 1940 and 2025 was 29 September 1961, reaching 35.3 °C.

Q: What is the coldest day in Sumidouro?

The coldest day measured in Sumidouro between 1940 and 2025 was 1 June 1979, at 3.9 °C.

Q: Does it snow in Sumidouro?

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

Q: Has the climate of Sumidouro warmed?

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

Q: What is the wettest day in Sumidouro?

The wettest day measured in Sumidouro between 1940 and 2025 was 8 December 1946, with 136 mm of rain in 24 hours.

Q: What was the windiest day in Sumidouro?

The windiest day measured in Sumidouro between 1940 and 2025 was 29 December 1990, with winds reaching 29.3 km/h.

Q: What is the warmest month in Sumidouro?

The warmest month in Sumidouro is February (23.0 °C on average); the coldest is July (16.8 °C).

Q: How much does it rain in Sumidouro?

Sumidouro receives on average 1,472 mm of precipitation per year, spread over about 159 rainy days.

Q: Is it sunny in Sumidouro?

Sumidouro gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

Sumidouro (Brazil) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 20.2 °C and it receives 1,472 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 (23.0 °C on average) and the coldest is July (16.8 °C). Rainfall peaks in December.

Sumidouro averages 0 frost days, 17 hot days (≥ 30 °C) and 159 rainy days per year.

Sumidouro 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 35.3 °C (on 29 September 1961) and the coldest 3.9 °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

SumidouroRio de Janeiro

coords: -22.05°, -42.67°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthFebruaryColdest monthJulyWettest monthDecemberDriest monthJuly

Mean daily temperature

20.2°C

Average daily high

24.7°C

Average daily low

16.3°C

Annual rainfall

1,472mm

Sunshine / day

9.3h

Mean relative humidity

81%

Average peak wind

9.8km/h

Seasonal range

6.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

17 d/yr

Rainy days (≥ 1 mm)

159 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.0 °C

Average feels-like low

17.6 °C

Average peak gust

27.6 km/h

Tropical nights (≥ 20 °C)

37 d/yr

Solar radiation

16.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.8 °C

since 1940

+0.2 °C per decade · r² = 0.61 · 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

35.3 °C

29 September 1961

Coldest day

3.9 °C

1 June 1979

Wettest day

136 mm

8 December 1946

Windiest day

29.3 km/h

29 December 1990

Strongest gust

70.2 km/h

3 November 1955

Hottest feels-like

40.0 °C

18 January 1995

Coldest feels-like

1.3 °C

1 June 1979

Sunniest day

13.3 h

29 December 2016

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	32.9 °C21 January 2025	6.8 °C31 July 2025	20.5 °C	1,021 mm	30
2024	32.8 °C20 January 2024	7.3 °C11 August 2024	21.5 °C	1,259 mm	34
2023	34.5 °C18 November 2023	7.0 °C15 July 2023	21.0 °C	1,337 mm	42
2022	33.4 °C10 September 2022	7.3 °C28 June 2022	20.3 °C	1,385 mm	14
2021	32.8 °C21 September 2021	5.8 °C31 July 2021	20.1 °C	1,261 mm	10
2020	33.9 °C3 October 2020	7.7 °C27 May 2020	20.5 °C	1,456 mm	26
2019	33.4 °C3 February 2019	7.1 °C19 July 2019	21.4 °C	1,040 mm	52
2018	32.2 °C19 January 2018	8.2 °C21 May 2018	21.0 °C	1,497 mm	35
2017	33.0 °C25 December 2017	7.8 °C4 July 2017	20.7 °C	898 mm	23
2016	33.2 °C10 February 2016	5.9 °C14 June 2016	21.0 °C	1,338 mm	35
2015	33.9 °C17 October 2015	10.3 °C10 June 2015	21.5 °C	1,072 mm	49
2014	33.3 °C14 October 2014	6.3 °C6 August 2014	21.0 °C	810 mm	35
2013	33.2 °C12 November 2013	8.1 °C8 July 2013	20.4 °C	1,469 mm	16
2012	34.3 °C31 October 2012	7.8 °C29 September 2012	20.5 °C	1,230 mm	23
2011	32.5 °C30 January 2011	7.8 °C3 September 2011	20.1 °C	1,475 mm	27
2010	33.5 °C16 February 2010	6.7 °C18 August 2010	21.0 °C	1,212 mm	59
2009	32.3 °C3 March 2009	6.6 °C4 June 2009	21.0 °C	1,664 mm	29
2008	32.7 °C27 October 2008	8.8 °C15 July 2008	20.3 °C	1,691 mm	19
2007	33.3 °C24 September 2007	5.4 °C30 July 2007	20.8 °C	1,286 mm	28
2006	34.1 °C25 January 2006	8.0 °C6 September 2006	20.9 °C	1,057 mm	27
2005	31.8 °C18 October 2005	9.2 °C9 July 2005	20.9 °C	1,466 mm	17
2004	32.5 °C29 September 2004	8.9 °C24 July 2004	20.3 °C	1,640 mm	14
2003	32.5 °C26 February 2003	9.0 °C12 August 2003	20.8 °C	1,306 mm	35
2002	32.4 °C17 October 2002	10.5 °C3 September 2002	21.3 °C	1,383 mm	36
2001	31.9 °C4 October 2001	9.6 °C18 September 2001	20.6 °C	1,081 mm	24
2000	32.8 °C15 January 2000	5.5 °C18 July 2000	20.0 °C	1,311 mm	14
1999	32.4 °C20 January 1999	7.9 °C24 September 1999	19.8 °C	1,274 mm	14
1998	33.2 °C5 February 1998	8.0 °C8 June 1998	20.7 °C	1,385 mm	29
1997	33.8 °C9 September 1997	7.9 °C11 August 1997	20.7 °C	1,516 mm	33
1996	32.6 °C10 February 1996	7.3 °C24 July 1996	20.2 °C	1,571 mm	31
1995	35.1 °C17 January 1995	8.9 °C6 September 1995	20.7 °C	1,511 mm	40
1994	33.1 °C17 February 1994	5.4 °C10 July 1994	20.7 °C	1,450 mm	41
1993	31.6 °C8 March 1993	8.9 °C22 June 1993	21.0 °C	1,107 mm	22
1992	31.6 °C6 April 1992	8.5 °C28 July 1992	20.4 °C	1,693 mm	7
1991	31.3 °C26 December 1991	8.6 °C5 August 1991	20.3 °C	1,783 mm	9
1990	32.1 °C25 January 1990	9.0 °C13 June 1990	20.5 °C	1,128 mm	19
1989	30.4 °C21 February 1989	7.9 °C10 July 1989	20.2 °C	1,422 mm	4
1988	33.2 °C30 January 1988	5.8 °C16 July 1988	20.1 °C	1,571 mm	15
1987	32.7 °C9 January 1987	7.0 °C27 May 1987	20.7 °C	1,679 mm	13
1986	31.3 °C2 February 1986	8.4 °C9 July 1986	20.5 °C	1,340 mm	8
1985	31.6 °C4 February 1985	5.3 °C9 June 1985	19.9 °C	1,741 mm	3
1984	32.5 °C14 January 1984	7.6 °C1 August 1984	20.7 °C	1,228 mm	17
1983	30.9 °C26 February 1983	6.9 °C6 August 1983	20.4 °C	1,945 mm	4
1982	30.4 °C21 November 1982	8.2 °C6 May 1982	20.1 °C	1,490 mm	1
1981	31.2 °C29 September 1981	7.4 °C6 July 1981	19.9 °C	1,500 mm	6
1980	31.1 °C6 February 1980	8.1 °C27 September 1980	20.3 °C	1,333 mm	7
1979	31.2 °C15 December 1979	3.9 °C1 June 1979	19.6 °C	1,900 mm	3
1978	30.7 °C7 December 1978	5.9 °C2 June 1978	19.9 °C	1,368 mm	4
1977	31.1 °C1 March 1977	8.0 °C21 May 1977	20.6 °C	1,247 mm	10
1976	31.0 °C12 January 1976	8.6 °C19 July 1976	20.0 °C	1,623 mm	7
1975	32.4 °C9 December 1975	7.0 °C7 July 1975	19.9 °C	1,631 mm	11
1974	31.1 °C22 February 1974	7.4 °C16 June 1974	20.1 °C	1,111 mm	10
1973	33.5 °C11 February 1973	9.3 °C20 June 1973	20.7 °C	1,619 mm	28
1972	32.8 °C6 January 1972	9.1 °C17 August 1972	20.3 °C	1,401 mm	10
1971	32.2 °C31 January 1971	8.4 °C14 September 1971	20.1 °C	1,331 mm	23
1970	31.5 °C9 January 1970	8.1 °C6 July 1970	20.1 °C	1,017 mm	14
1969	32.6 °C10 January 1969	8.6 °C6 June 1969	20.2 °C	1,197 mm	18
1968	31.9 °C3 November 1968	7.3 °C18 May 1968	19.1 °C	997 mm	14
1967	31.9 °C12 October 1967	8.9 °C10 June 1967	20.2 °C	1,615 mm	6
1966	32.6 °C5 December 1966	8.4 °C19 September 1966	19.6 °C	1,779 mm	8
1965	30.0 °C14 December 1965	5.7 °C12 July 1965	19.5 °C	1,959 mm	2
1964	30.2 °C18 February 1964	7.5 °C29 July 1964	18.8 °C	1,936 mm	2
1963	34.6 °C15 October 1963	8.0 °C23 June 1963	20.4 °C	825 mm	27
1962	29.5 °C18 February 1962	7.7 °C18 June 1962	18.8 °C	2,424 mm	0
1961	35.3 °C29 September 1961	9.9 °C7 August 1961	20.3 °C	1,509 mm	24
1960	32.2 °C25 September 1960	8.0 °C5 June 1960	19.1 °C	1,858 mm	6
1959	30.8 °C27 February 1959	9.0 °C13 June 1959	20.0 °C	1,441 mm	7
1958	32.3 °C19 December 1958	7.6 °C22 September 1958	19.7 °C	1,175 mm	12
1957	31.3 °C26 October 1957	6.6 °C23 July 1957	19.6 °C	1,735 mm	4
1956	32.3 °C27 January 1956	7.5 °C17 August 1956	19.0 °C	1,219 mm	15
1955	33.3 °C1 October 1955	8.9 °C29 September 1955	19.5 °C	1,019 mm	15
1954	34.4 °C19 September 1954	8.3 °C12 August 1954	19.9 °C	1,819 mm	12
1953	30.4 °C2 February 1953	8.0 °C29 July 1953	19.8 °C	1,628 mm	1
1952	30.2 °C31 January 1952	9.5 °C16 July 1952	19.5 °C	2,197 mm	2
1951	32.4 °C16 November 1951	7.8 °C14 August 1951	19.2 °C	1,201 mm	12
1950	30.4 °C14 January 1950	8.2 °C14 July 1950	19.3 °C	1,690 mm	5
1949	29.9 °C18 March 1949	8.5 °C27 August 1949	19.1 °C	2,012 mm	0
1948	31.4 °C27 January 1948	7.2 °C31 August 1948	19.5 °C	1,134 mm	9
1947	32.8 °C9 January 1947	7.0 °C2 September 1947	19.3 °C	1,598 mm	22
1946	30.0 °C2 November 1946	8.3 °C29 July 1946	19.9 °C	1,665 mm	1
1945	31.1 °C30 August 1945	8.7 °C14 July 1945	19.8 °C	1,744 mm	3
1944	32.0 °C2 October 1944	8.4 °C23 August 1944	19.4 °C	2,089 mm	3
1943	28.4 °C17 January 1943	7.7 °C5 September 1943	18.3 °C	1,751 mm	0
1942	32.6 °C7 October 1942	6.1 °C24 June 1942	18.8 °C	1,352 mm	2
1941	31.1 °C13 January 1941	8.2 °C1 July 1941	19.4 °C	2,305 mm	3
1940	30.2 °C23 August 1940	9.5 °C10 July 1940	19.7 °C	2,163 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

25.3 °C

+0.6 °C

Hot days (≥ 30 °C)

30 d/yr

+13

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1021 mm

-452 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	27.9 °C	+0.7 °C	189 mm	-54 mm
Feb	29.6 °C	+2.1 °C	11 mm	-155 mm
Mar	27.7 °C	+0.9 °C	183 mm	+30 mm
Apr	25.2 °C	+0.1 °C	104 mm	+25 mm
May	23.5 °C	+0.4 °C	10 mm	-33 mm
Jun	22.7 °C	+0.6 °C	13 mm	-15 mm
Jul	21.5 °C	-0.2 °C	8 mm	-16 mm
Aug	23.0 °C	0.0 °C	15 mm	-19 mm
Sep	23.9 °C	-0.2 °C	42 mm	-33 mm
Oct	24.5 °C	-0.3 °C	100 mm	-46 mm
Nov	25.9 °C	+0.7 °C	112 mm	-106 mm
Dec	28.3 °C	+2.1 °C	234 mm	-31 mm

The year's extremes

Hottest day

32.9 °C

21 Jan 2025

Coldest day

6.8 °C

31 Jul 2025

Wettest day

87.2 mm

24 Mar 2025

Windiest day

21.6 km/h

19 Oct 2025

Strongest gust

66.6 km/h

10 Dec 2025

Hottest feels-like

38.5 °C

22 Jan 2025

Coldest feels-like

5.0 °C

31 Jul 2025

Sunniest day

13.3 h

30 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 Sumidouro?

Sumidouro has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 20.2 °C and it receives 1,472 mm of precipitation per year.

What is the hottest day ever recorded in Sumidouro?

The hottest day measured in Sumidouro between 1940 and 2025 was 29 September 1961, reaching 35.3 °C.

What is the coldest day in Sumidouro?

The coldest day measured in Sumidouro between 1940 and 2025 was 1 June 1979, at 3.9 °C.

Does it snow in Sumidouro?

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

Has the climate of Sumidouro warmed?

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

What is the wettest day in Sumidouro?

The wettest day measured in Sumidouro between 1940 and 2025 was 8 December 1946, with 136 mm of rain in 24 hours.

What was the windiest day in Sumidouro?

The windiest day measured in Sumidouro between 1940 and 2025 was 29 December 1990, with winds reaching 29.3 km/h.

What is the warmest month in Sumidouro?

The warmest month in Sumidouro is February (23.0 °C on average); the coldest is July (16.8 °C).

How much does it rain in Sumidouro?

Sumidouro receives on average 1,472 mm of precipitation per year, spread over about 159 rainy days.

Is it sunny in Sumidouro?

Sumidouro gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

Are there tropical nights in Sumidouro?

Yes: Sumidouro has on average 37 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Sumidouro?

In Sumidouro, between 1940 and 2025, the highest apparent temperature reached 40.0 °C on 18 January 1995, and the lowest was 1.3 °C on 1 June 1979.

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