Cairu climate — normals and trends

Q: What is the climate of Cairu?

Cairu has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 24.6 °C and it receives 1,330 mm of precipitation per year.

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

The hottest day measured in Cairu between 1940 and 2025 was 6 March 1973, reaching 33.4 °C.

Q: What is the coldest day in Cairu?

The coldest day measured in Cairu between 1940 and 2025 was 23 July 1967, at 17.4 °C.

Q: Does it snow in Cairu?

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

Q: Has the climate of Cairu warmed?

Yes: Cairu warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Cairu?

The wettest day measured in Cairu between 1940 and 2025 was 17 April 2022, with 144 mm of rain in 24 hours.

Q: What was the windiest day in Cairu?

The windiest day measured in Cairu between 1940 and 2025 was 14 July 1988, with winds reaching 35.4 km/h.

Q: What is the warmest month in Cairu?

The warmest month in Cairu is February (26.1 °C on average); the coldest is July (22.5 °C).

Q: How much does it rain in Cairu?

Cairu receives on average 1,330 mm of precipitation per year, spread over about 262 rainy days.

Q: Is it sunny in Cairu?

Cairu gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Cairu (Brazil) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 24.6 °C and it receives 1,330 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 (26.1 °C on average) and the coldest is July (22.5 °C). Rainfall peaks in May.

Cairu averages 0 frost days, 16 hot days (≥ 30 °C) and 262 rainy days per year.

Cairu has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.

The hottest day of the period reached 33.4 °C (on 6 March 1973) and the coldest 17.4 °C (on 23 July 1967).

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

CairuEstado de Bahia

coords: -13.49°, -39.04°
period: 1940–2025 · 86 yrs

AfTropical rainforestWarmest monthFebruaryColdest monthJulyWettest monthMayDriest monthSeptember

Mean daily temperature

24.6°C

Average daily high

27.0°C

Average daily low

22.5°C

Annual rainfall

1,330mm

Sunshine / day

10.9h

Mean relative humidity

83%

Average peak wind

16.4km/h

Seasonal range

3.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

16 d/yr

Rainy days (≥ 1 mm)

262 d/yr

Annual snowfall

0.0 cm

Average feels-like high

30.9 °C

Average feels-like low

25.5 °C

Average peak gust

31.2 km/h

Tropical nights (≥ 20 °C)

346 d/yr

Solar radiation

18.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.1 °C

since 1940

+0.1 °C per decade · r² = 0.54 · 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

33.4 °C

6 March 1973

Coldest day

17.4 °C

23 July 1967

Wettest day

144 mm

17 April 2022

Windiest day

35.4 km/h

14 July 1988

Strongest gust

61.2 km/h

14 July 1988

Hottest feels-like

40.5 °C

20 March 2019

Coldest feels-like

16.3 °C

1 June 1964

Sunniest day

12.8 h

3 December 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	31.1 °C5 January 2025	18.8 °C29 September 2025	24.7 °C	1,631 mm	14
2024	32.2 °C11 March 2024	19.5 °C30 June 2024	25.4 °C	1,676 mm	53
2023	31.9 °C19 April 2023	19.3 °C5 August 2023	25.0 °C	1,393 mm	13
2022	31.0 °C15 April 2022	18.4 °C31 August 2022	24.6 °C	1,762 mm	7
2021	31.8 °C31 March 2021	18.8 °C17 July 2021	24.8 °C	1,418 mm	14
2020	32.3 °C4 April 2020	18.9 °C26 August 2020	24.9 °C	1,522 mm	27
2019	32.8 °C17 February 2019	19.3 °C17 July 2019	25.6 °C	1,106 mm	49
2018	32.0 °C6 March 2018	19.1 °C30 July 2018	25.1 °C	1,121 mm	14
2017	30.7 °C26 March 2017	18.4 °C9 August 2017	24.7 °C	1,051 mm	12
2016	31.8 °C3 January 2016	19.6 °C10 August 2016	25.4 °C	1,124 mm	37
2015	32.1 °C7 April 2015	19.7 °C8 August 2015	25.3 °C	1,213 mm	28
2014	29.8 °C17 January 2014	19.4 °C6 October 2014	24.7 °C	1,367 mm	0
2013	32.2 °C6 April 2013	19.8 °C2 August 2013	25.0 °C	1,450 mm	26
2012	30.7 °C25 March 2012	18.5 °C26 July 2012	24.9 °C	830 mm	11
2011	33.0 °C15 March 2011	18.8 °C6 September 2011	24.8 °C	1,311 mm	21
2010	32.4 °C4 March 2010	18.9 °C5 September 2010	25.4 °C	1,325 mm	38
2009	31.7 °C1 April 2009	20.4 °C29 July 2009	25.6 °C	1,202 mm	37
2008	31.7 °C24 February 2008	17.8 °C25 July 2008	25.1 °C	1,074 mm	20
2007	31.7 °C2 February 2007	18.9 °C3 June 2007	24.8 °C	1,267 mm	23
2006	31.6 °C25 February 2006	17.9 °C19 July 2006	24.8 °C	1,317 mm	24
2005	31.6 °C26 January 2005	18.4 °C19 July 2005	24.9 °C	1,438 mm	9
2004	30.4 °C2 January 2004	17.8 °C14 August 2004	24.7 °C	1,398 mm	6
2003	30.9 °C12 January 2003	19.0 °C7 July 2003	25.0 °C	1,299 mm	23
2002	31.1 °C24 December 2002	18.9 °C8 July 2002	24.8 °C	1,359 mm	4
2001	30.9 °C6 February 2001	19.1 °C16 August 2001	24.6 °C	1,229 mm	5
2000	32.1 °C3 February 2000	18.7 °C30 July 2000	24.6 °C	1,590 mm	9
1999	30.6 °C5 March 1999	18.4 °C25 September 1999	24.5 °C	1,938 mm	7
1998	32.3 °C26 March 1998	19.8 °C3 August 1998	25.4 °C	1,332 mm	57
1997	30.9 °C29 November 1997	18.8 °C13 August 1997	24.8 °C	1,130 mm	15
1996	31.7 °C25 March 1996	18.5 °C25 July 1996	24.9 °C	1,398 mm	31
1995	32.6 °C23 January 1995	19.4 °C3 August 1995	25.0 °C	1,221 mm	34
1994	31.4 °C19 December 1994	18.1 °C11 August 1994	24.7 °C	1,164 mm	19
1993	31.7 °C9 April 1993	19.1 °C25 June 1993	24.8 °C	862 mm	18
1992	30.0 °C6 January 1992	19.0 °C29 July 1992	24.4 °C	1,476 mm	1
1991	31.4 °C14 February 1991	18.2 °C17 August 1991	24.5 °C	1,273 mm	13
1990	30.2 °C25 February 1990	19.0 °C20 July 1990	24.8 °C	1,134 mm	4
1989	30.8 °C3 March 1989	18.6 °C7 August 1989	24.7 °C	1,863 mm	15
1988	31.9 °C4 March 1988	18.6 °C7 September 1988	24.8 °C	1,408 mm	28
1987	30.7 °C7 March 1987	19.3 °C6 August 1987	25.2 °C	972 mm	18
1986	30.6 °C16 February 1986	18.4 °C11 July 1986	24.4 °C	1,182 mm	4
1985	31.7 °C28 January 1985	18.4 °C25 July 1985	24.5 °C	1,904 mm	6
1984	32.0 °C13 March 1984	19.6 °C22 July 1984	24.8 °C	1,332 mm	23
1983	30.8 °C7 April 1983	19.2 °C31 August 1983	24.7 °C	1,165 mm	6
1982	31.2 °C24 March 1982	19.1 °C12 July 1982	24.3 °C	1,075 mm	10
1981	31.9 °C10 March 1981	17.8 °C22 July 1981	24.0 °C	1,472 mm	4
1980	30.1 °C28 January 1980	19.5 °C9 July 1980	24.3 °C	1,473 mm	1
1979	30.1 °C15 March 1979	18.2 °C14 July 1979	24.2 °C	1,152 mm	3
1978	30.2 °C1 April 1978	18.8 °C28 August 1978	24.2 °C	1,993 mm	1
1977	31.3 °C20 January 1977	19.2 °C8 August 1977	24.4 °C	1,556 mm	10
1976	31.0 °C28 December 1976	18.3 °C5 July 1976	24.3 °C	1,078 mm	6
1975	31.0 °C4 April 1975	18.5 °C28 July 1975	24.3 °C	1,407 mm	6
1974	32.1 °C27 March 1974	18.7 °C1 July 1974	24.4 °C	1,760 mm	14
1973	33.4 °C6 March 1973	19.4 °C26 July 1973	25.1 °C	1,503 mm	38
1972	32.1 °C13 December 1972	19.4 °C18 August 1972	24.9 °C	1,057 mm	26
1971	31.4 °C24 April 1971	18.8 °C20 July 1971	24.3 °C	1,324 mm	8
1970	31.1 °C2 December 1970	18.6 °C22 August 1970	24.0 °C	1,383 mm	4
1969	30.2 °C6 March 1969	18.8 °C28 August 1969	24.3 °C	1,511 mm	2
1968	30.1 °C7 April 1968	18.5 °C15 July 1968	23.6 °C	1,780 mm	1
1967	32.8 °C15 February 1967	17.4 °C23 July 1967	24.1 °C	1,366 mm	17
1966	30.7 °C12 January 1966	18.5 °C21 August 1966	24.2 °C	1,519 mm	11
1965	32.9 °C6 February 1965	18.9 °C29 July 1965	24.5 °C	1,118 mm	15
1964	31.1 °C17 January 1964	18.5 °C1 June 1964	24.1 °C	1,436 mm	15
1963	32.0 °C13 December 1963	18.3 °C10 July 1963	24.4 °C	1,321 mm	35
1962	32.4 °C25 February 1962	18.4 °C18 June 1962	24.7 °C	989 mm	44
1961	31.5 °C4 March 1961	18.9 °C12 August 1961	24.6 °C	847 mm	39
1960	31.0 °C25 January 1960	18.7 °C15 July 1960	23.9 °C	1,540 mm	3
1959	31.6 °C15 March 1959	19.3 °C27 August 1959	24.5 °C	924 mm	16
1958	30.8 °C8 February 1958	19.1 °C21 August 1958	24.2 °C	1,442 mm	3
1957	31.4 °C21 December 1957	18.1 °C31 May 1957	24.1 °C	1,332 mm	19
1956	30.4 °C4 March 1956	18.5 °C18 August 1956	23.9 °C	1,369 mm	1
1955	31.2 °C17 January 1955	18.8 °C9 August 1955	24.0 °C	1,095 mm	5
1954	31.6 °C21 March 1954	18.7 °C30 August 1954	24.3 °C	1,017 mm	14
1953	32.1 °C14 December 1953	19.1 °C29 July 1953	24.4 °C	1,099 mm	10
1952	31.9 °C27 February 1952	18.8 °C4 August 1952	24.6 °C	1,072 mm	28
1951	31.4 °C13 December 1951	18.2 °C16 September 1951	24.0 °C	1,172 mm	14
1950	30.8 °C13 January 1950	18.8 °C27 August 1950	24.1 °C	1,112 mm	13
1949	31.4 °C6 February 1949	19.0 °C10 August 1949	24.2 °C	1,299 mm	21
1948	31.3 °C5 March 1948	19.1 °C3 September 1948	24.1 °C	1,534 mm	11
1947	32.1 °C12 March 1947	19.6 °C17 August 1947	24.3 °C	1,441 mm	36
1946	31.1 °C9 November 1946	19.0 °C6 August 1946	24.5 °C	1,002 mm	17
1945	30.8 °C30 November 1945	19.0 °C31 July 1945	24.2 °C	1,344 mm	6
1944	30.4 °C22 March 1944	17.9 °C25 August 1944	23.8 °C	1,590 mm	1
1943	30.9 °C22 January 1943	17.6 °C22 August 1943	23.6 °C	1,794 mm	4
1942	32.2 °C2 April 1942	18.0 °C10 September 1942	24.0 °C	1,121 mm	11
1941	30.9 °C4 March 1941	19.1 °C13 July 1941	24.5 °C	1,292 mm	11
1940	31.7 °C24 February 1940	19.0 °C25 August 1940	24.3 °C	1,450 mm	16

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

27.2 °C

+0.2 °C

Hot days (≥ 30 °C)

14 d/yr

-2

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1631 mm

+301 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.3 °C	+0.8 °C	180 mm	+96 mm
Feb	28.3 °C	-0.3 °C	112 mm	+26 mm
Mar	28.7 °C	+0.1 °C	101 mm	-15 mm
Apr	28.7 °C	+1.0 °C	109 mm	-40 mm
May	26.5 °C	-0.1 °C	276 mm	+125 mm
Jun	26.0 °C	+0.5 °C	162 mm	+18 mm
Jul	25.0 °C	+0.2 °C	118 mm	-18 mm
Aug	25.4 °C	+0.5 °C	113 mm	+9 mm
Sep	25.8 °C	+0.1 °C	80 mm	-4 mm
Oct	26.3 °C	-0.6 °C	186 mm	+101 mm
Nov	27.7 °C	+0.1 °C	144 mm	+40 mm
Dec	28.3 °C	+0.1 °C	51 mm	-37 mm

The year's extremes

Hottest day

31.1 °C

5 Jan 2025

Coldest day

18.8 °C

29 Sep 2025

Wettest day

65.3 mm

11 Jan 2025

Windiest day

31.3 km/h

20 Oct 2025

Strongest gust

55.4 km/h

20 Oct 2025

Hottest feels-like

38.2 °C

20 Nov 2025

Coldest feels-like

19.3 °C

27 Sep 2025

Sunniest day

12.8 h

4 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 Cairu?

Cairu has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 24.6 °C and it receives 1,330 mm of precipitation per year.

What is the hottest day ever recorded in Cairu?

The hottest day measured in Cairu between 1940 and 2025 was 6 March 1973, reaching 33.4 °C.

What is the coldest day in Cairu?

The coldest day measured in Cairu between 1940 and 2025 was 23 July 1967, at 17.4 °C.

Does it snow in Cairu?

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

Has the climate of Cairu warmed?

Yes: Cairu warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Cairu?

The wettest day measured in Cairu between 1940 and 2025 was 17 April 2022, with 144 mm of rain in 24 hours.

What was the windiest day in Cairu?

The windiest day measured in Cairu between 1940 and 2025 was 14 July 1988, with winds reaching 35.4 km/h.

What is the warmest month in Cairu?

The warmest month in Cairu is February (26.1 °C on average); the coldest is July (22.5 °C).

How much does it rain in Cairu?

Cairu receives on average 1,330 mm of precipitation per year, spread over about 262 rainy days.

Is it sunny in Cairu?

Cairu gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Are there tropical nights in Cairu?

Yes: Cairu has on average 346 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Cairu?

In Cairu, between 1940 and 2025, the highest apparent temperature reached 40.5 °C on 20 March 2019, and the lowest was 16.3 °C on 1 June 1964.

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