Casa Branca climate — normals and trends

Q: What is the climate of Casa Branca?

Casa Branca has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 21.4 °C and it receives 1,283 mm of precipitation per year.

Q: What is the hottest day ever recorded in Casa Branca?

The hottest day measured in Casa Branca between 1940 and 2025 was 17 October 2014, reaching 38.5 °C.

Q: What is the coldest day in Casa Branca?

The coldest day measured in Casa Branca between 1940 and 2025 was 21 July 1981, at 0.9 °C.

Q: Does it snow in Casa Branca?

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

Q: Has the climate of Casa Branca warmed?

Yes: Casa Branca warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Casa Branca?

The wettest day measured in Casa Branca between 1940 and 2025 was 24 December 1945, with 129 mm of rain in 24 hours.

Q: What was the windiest day in Casa Branca?

The windiest day measured in Casa Branca between 1940 and 2025 was 15 September 1956, with winds reaching 32.1 km/h.

Q: What is the warmest month in Casa Branca?

The warmest month in Casa Branca is February (23.5 °C on average); the coldest is June (17.9 °C).

Q: How much does it rain in Casa Branca?

Casa Branca receives on average 1,283 mm of precipitation per year, spread over about 151 rainy days.

Q: Is it sunny in Casa Branca?

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

Casa Branca (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 21.4 °C and it receives 1,283 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 (23.5 °C on average) and the coldest is June (17.9 °C). Rainfall peaks in January.

Casa Branca averages 0 frost days, 66 hot days (≥ 30 °C) and 151 rainy days per year.

Casa Branca has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.5 °C (on 17 October 2014) and the coldest 0.9 °C (on 21 July 1981).

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

Casa BrancaSão Paulo

coords: -21.77°, -47.09°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthFebruaryColdest monthJuneWettest monthJanuaryDriest monthAugust

Mean daily temperature

21.4°C

Average daily high

26.9°C

Average daily low

16.8°C

Annual rainfall

1,283mm

Sunshine / day

10.1h

Mean relative humidity

71%

Average peak wind

12.5km/h

Seasonal range

5.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

66 d/yr

Rainy days (≥ 1 mm)

151 d/yr

Annual snowfall

0.0 cm

Average feels-like high

28.7 °C

Average feels-like low

17.3 °C

Average peak gust

31.2 km/h

Tropical nights (≥ 20 °C)

56 d/yr

Solar radiation

18.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.2 °C

since 1940

+0.3 °C per decade · r² = 0.69 · 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

38.5 °C

17 October 2014

Coldest day

0.9 °C

21 July 1981

Wettest day

129 mm

24 December 1945

Windiest day

32.1 km/h

15 September 1956

Strongest gust

79.9 km/h

28 November 1950

Hottest feels-like

41.0 °C

18 January 2015

Coldest feels-like

-2.5 °C

21 July 1981

Sunniest day

13.3 h

23 December 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	35.6 °C6 October 2025	3.7 °C25 June 2025	22.0 °C	860 mm	127
2024	37.2 °C8 October 2024	4.0 °C13 August 2024	22.9 °C	1,108 mm	167
2023	37.8 °C14 November 2023	4.8 °C19 June 2023	22.1 °C	956 mm	120
2022	34.2 °C10 September 2022	4.2 °C20 May 2022	21.7 °C	1,057 mm	109
2021	37.1 °C21 September 2021	1.5 °C30 July 2021	22.0 °C	872 mm	118
2020	37.5 °C6 October 2020	6.3 °C26 May 2020	22.0 °C	988 mm	100
2019	36.8 °C12 September 2019	5.5 °C7 July 2019	22.8 °C	994 mm	133
2018	35.2 °C18 December 2018	6.5 °C12 July 2018	22.8 °C	936 mm	138
2017	37.1 °C14 October 2017	9.2 °C11 June 2017	22.7 °C	973 mm	137
2016	35.5 °C17 October 2016	4.7 °C13 June 2016	22.5 °C	1,312 mm	140
2015	38.1 °C19 January 2015	11.7 °C29 July 2015	23.1 °C	1,280 mm	127
2014	38.5 °C17 October 2014	10.1 °C4 June 2014	23.3 °C	679 mm	170
2013	35.5 °C11 November 2013	6.1 °C26 July 2013	21.7 °C	1,325 mm	86
2012	36.7 °C31 October 2012	6.5 °C15 July 2012	22.3 °C	1,115 mm	118
2011	34.4 °C30 September 2011	4.6 °C5 August 2011	21.8 °C	1,329 mm	88
2010	34.6 °C29 October 2010	7.2 °C16 August 2010	22.2 °C	1,010 mm	119
2009	33.5 °C13 January 2009	5.4 °C4 June 2009	22.0 °C	1,520 mm	76
2008	35.8 °C16 October 2008	7.3 °C15 July 2008	21.7 °C	1,178 mm	68
2007	35.6 °C23 September 2007	6.6 °C25 May 2007	22.4 °C	1,108 mm	107
2006	35.3 °C15 September 2006	7.4 °C6 September 2006	21.8 °C	1,083 mm	74
2005	35.0 °C17 October 2005	8.9 °C9 July 2005	22.1 °C	1,122 mm	75
2004	34.2 °C24 September 2004	7.4 °C24 July 2004	21.2 °C	1,364 mm	53
2003	34.3 °C19 October 2003	7.7 °C27 May 2003	21.9 °C	1,052 mm	81
2002	36.0 °C12 October 2002	5.9 °C3 September 2002	22.5 °C	1,082 mm	108
2001	34.3 °C10 September 2001	6.6 °C28 June 2001	22.0 °C	1,079 mm	102
2000	35.3 °C13 October 2000	3.7 °C18 July 2000	21.4 °C	1,483 mm	58
1999	34.8 °C1 October 1999	6.8 °C24 June 1999	21.4 °C	1,162 mm	74
1998	33.4 °C13 September 1998	7.0 °C13 July 1998	21.7 °C	1,281 mm	82
1997	34.4 °C9 September 1997	5.0 °C9 June 1997	21.7 °C	1,411 mm	88
1996	33.3 °C25 January 1996	5.4 °C13 July 1996	21.3 °C	1,536 mm	67
1995	35.3 °C18 January 1995	9.0 °C8 June 1995	21.8 °C	1,618 mm	90
1994	35.5 °C2 October 1994	2.4 °C27 June 1994	22.0 °C	1,329 mm	97
1993	34.2 °C30 November 1993	6.9 °C1 August 1993	21.6 °C	1,254 mm	69
1992	32.5 °C15 November 1992	9.1 °C15 August 1992	21.4 °C	1,286 mm	28
1991	32.8 °C19 November 1991	8.4 °C7 July 1991	21.5 °C	1,701 mm	49
1990	34.5 °C11 October 1990	4.6 °C19 May 1990	21.9 °C	1,150 mm	106
1989	32.2 °C9 December 1989	5.0 °C10 July 1989	21.0 °C	1,407 mm	33
1988	36.4 °C27 September 1988	2.1 °C6 June 1988	21.5 °C	1,290 mm	72
1987	34.1 °C18 October 1987	4.8 °C9 August 1987	21.8 °C	1,186 mm	81
1986	35.2 °C7 October 1986	6.3 °C5 June 1986	21.6 °C	1,265 mm	67
1985	36.1 °C17 November 1985	3.2 °C8 June 1985	21.3 °C	1,123 mm	71
1984	35.3 °C4 November 1984	6.8 °C27 August 1984	22.2 °C	1,044 mm	87
1983	32.6 °C17 February 1983	6.3 °C5 August 1983	21.3 °C	2,104 mm	27
1982	32.3 °C16 February 1982	9.9 °C28 May 1982	21.2 °C	1,579 mm	39
1981	34.6 °C20 September 1981	0.9 °C21 July 1981	21.4 °C	1,177 mm	55
1980	35.3 °C28 October 1980	6.1 °C15 June 1980	21.6 °C	1,197 mm	57
1979	33.9 °C7 December 1979	2.0 °C1 June 1979	21.1 °C	1,333 mm	55
1978	33.6 °C25 October 1978	4.6 °C16 August 1978	21.3 °C	1,130 mm	63
1977	33.2 °C28 February 1977	6.8 °C18 May 1977	21.7 °C	1,264 mm	68
1976	32.8 °C19 January 1976	6.3 °C6 July 1976	20.6 °C	1,756 mm	21
1975	33.2 °C21 December 1975	5.1 °C18 July 1975	21.2 °C	1,266 mm	70
1974	34.5 °C19 November 1974	7.0 °C17 August 1974	21.1 °C	1,349 mm	64
1973	34.3 °C22 February 1973	4.8 °C20 June 1973	21.7 °C	1,242 mm	71
1972	33.8 °C26 October 1972	6.4 °C9 July 1972	21.1 °C	1,492 mm	35
1971	34.7 °C25 January 1971	6.8 °C7 July 1971	21.2 °C	1,085 mm	61
1970	34.0 °C24 December 1970	7.5 °C15 July 1970	21.3 °C	912 mm	52
1969	34.4 °C11 September 1969	4.4 °C11 July 1969	21.9 °C	802 mm	93
1968	34.9 °C8 October 1968	5.2 °C18 May 1968	20.7 °C	796 mm	59
1967	32.8 °C6 September 1967	6.4 °C10 June 1967	21.3 °C	1,208 mm	48
1966	33.8 °C16 September 1966	7.9 °C7 August 1966	20.7 °C	1,343 mm	22
1965	33.2 °C5 September 1965	2.9 °C12 July 1965	20.3 °C	1,512 mm	22
1964	31.7 °C2 September 1964	4.9 °C28 July 1964	19.9 °C	1,852 mm	4
1963	37.0 °C18 October 1963	4.9 °C22 June 1963	22.0 °C	960 mm	84
1962	32.2 °C11 September 1962	4.6 °C7 July 1962	19.9 °C	1,647 mm	21
1961	37.6 °C28 September 1961	9.4 °C29 May 1961	21.8 °C	1,300 mm	70
1960	36.7 °C25 September 1960	6.4 °C10 July 1960	20.4 °C	1,569 mm	18
1959	33.3 °C4 October 1959	5.4 °C8 June 1959	21.4 °C	1,145 mm	54
1958	33.7 °C2 December 1958	6.8 °C20 June 1958	20.9 °C	1,121 mm	54
1957	35.1 °C20 October 1957	3.9 °C22 July 1957	20.6 °C	1,260 mm	24
1956	33.1 °C2 February 1956	5.4 °C22 July 1956	20.0 °C	1,144 mm	44
1955	35.7 °C1 October 1955	6.1 °C26 May 1955	21.0 °C	1,059 mm	55
1954	34.5 °C22 September 1954	6.9 °C21 June 1954	20.8 °C	1,649 mm	32
1953	31.9 °C21 August 1953	7.8 °C6 July 1953	20.8 °C	1,404 mm	5
1952	33.6 °C30 September 1952	6.0 °C16 July 1952	20.4 °C	1,340 mm	20
1951	33.7 °C19 November 1951	9.4 °C17 April 1951	20.5 °C	1,051 mm	29
1950	32.9 °C17 September 1950	7.8 °C11 June 1950	20.3 °C	1,547 mm	21
1949	33.1 °C13 October 1949	9.1 °C18 May 1949	20.3 °C	1,561 mm	13
1948	35.8 °C27 September 1948	7.2 °C16 June 1948	20.9 °C	1,128 mm	28
1947	32.7 °C9 January 1947	6.1 °C8 July 1947	20.1 °C	1,618 mm	14
1946	30.7 °C5 November 1946	5.6 °C27 July 1946	20.5 °C	1,506 mm	12
1945	31.5 °C28 September 1945	8.4 °C26 June 1945	20.3 °C	2,160 mm	6
1944	34.1 °C7 September 1944	8.3 °C11 July 1944	20.8 °C	1,487 mm	25
1943	30.7 °C17 January 1943	7.5 °C27 June 1943	19.6 °C	1,311 mm	1
1942	35.9 °C28 November 1942	4.2 °C19 June 1942	20.1 °C	1,074 mm	47
1941	30.5 °C12 January 1941	8.3 °C29 May 1941	20.5 °C	2,062 mm	5
1940	32.3 °C23 August 1940	9.7 °C19 August 1940	20.6 °C	1,965 mm	7

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

28.3 °C

+1.4 °C

Hot days (≥ 30 °C)

127 d/yr

+61

Frost days (< 0 °C)

0 d/yr

Annual rainfall

860 mm

-423 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.8 °C	+1.7 °C	142 mm	-79 mm
Feb	30.7 °C	+2.4 °C	85 mm	-89 mm
Mar	30.6 °C	+2.6 °C	78 mm	-59 mm
Apr	27.7 °C	+0.8 °C	86 mm	+20 mm
May	26.4 °C	+1.7 °C	4 mm	-45 mm
Jun	24.9 °C	+0.9 °C	30 mm	-1 mm
Jul	25.0 °C	+0.7 °C	3 mm	-22 mm
Aug	27.6 °C	+1.0 °C	4 mm	-21 mm
Sep	30.3 °C	+2.0 °C	14 mm	-44 mm
Oct	29.0 °C	+0.6 °C	112 mm	-8 mm
Nov	28.7 °C	+0.8 °C	139 mm	-20 mm
Dec	29.6 °C	+1.9 °C	162 mm	-56 mm

The year's extremes

Hottest day

35.6 °C

6 Oct 2025

Coldest day

3.7 °C

25 Jun 2025

Wettest day

37.4 mm

8 Nov 2025

Windiest day

26.1 km/h

10 Dec 2025

Strongest gust

62.6 km/h

18 Nov 2025

Hottest feels-like

39.1 °C

28 Dec 2025

Coldest feels-like

1.0 °C

25 Jun 2025

Sunniest day

13.3 h

23 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 Casa Branca?

Casa Branca has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 21.4 °C and it receives 1,283 mm of precipitation per year.

What is the hottest day ever recorded in Casa Branca?

The hottest day measured in Casa Branca between 1940 and 2025 was 17 October 2014, reaching 38.5 °C.

What is the coldest day in Casa Branca?

The coldest day measured in Casa Branca between 1940 and 2025 was 21 July 1981, at 0.9 °C.

Does it snow in Casa Branca?

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

Has the climate of Casa Branca warmed?

Yes: Casa Branca warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Casa Branca?

The wettest day measured in Casa Branca between 1940 and 2025 was 24 December 1945, with 129 mm of rain in 24 hours.

What was the windiest day in Casa Branca?

The windiest day measured in Casa Branca between 1940 and 2025 was 15 September 1956, with winds reaching 32.1 km/h.

What is the warmest month in Casa Branca?

The warmest month in Casa Branca is February (23.5 °C on average); the coldest is June (17.9 °C).

How much does it rain in Casa Branca?

Casa Branca receives on average 1,283 mm of precipitation per year, spread over about 151 rainy days.

Is it sunny in Casa Branca?

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

Are there tropical nights in Casa Branca?

Yes: Casa Branca has on average 56 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Casa Branca?

In Casa Branca, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 18 January 2015, and the lowest was -2.5 °C on 21 July 1981.

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