Casimiro de Abreu climate — normals and trends

Q: What is the climate of Casimiro de Abreu?

Casimiro de Abreu has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 2,032 mm of precipitation per year.

Q: What is the hottest day ever recorded in Casimiro de Abreu?

The hottest day measured in Casimiro de Abreu between 1940 and 2025 was 18 November 2023, reaching 36.8 °C.

Q: What is the coldest day in Casimiro de Abreu?

The coldest day measured in Casimiro de Abreu between 1940 and 2025 was 18 July 2000, at 6.2 °C.

Q: Does it snow in Casimiro de Abreu?

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

Q: Has the climate of Casimiro de Abreu warmed?

Yes: Casimiro de Abreu warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Casimiro de Abreu?

The wettest day measured in Casimiro de Abreu between 1940 and 2025 was 8 December 1946, with 181 mm of rain in 24 hours.

Q: What was the windiest day in Casimiro de Abreu?

The windiest day measured in Casimiro de Abreu between 1940 and 2025 was 31 July 1987, with winds reaching 33.4 km/h.

Q: What is the warmest month in Casimiro de Abreu?

The warmest month in Casimiro de Abreu is February (24.5 °C on average); the coldest is July (18.5 °C).

Q: How much does it rain in Casimiro de Abreu?

Casimiro de Abreu receives on average 2,032 mm of precipitation per year, spread over about 193 rainy days.

Q: Is it sunny in Casimiro de Abreu?

Casimiro de Abreu gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Casimiro de Abreu (Brazil) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 21.5 °C and it receives 2,032 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 (24.5 °C on average) and the coldest is July (18.5 °C). Rainfall peaks in December.

Casimiro de Abreu averages 0 frost days, 41 hot days (≥ 30 °C) and 193 rainy days per year.

Casimiro de Abreu has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.

The hottest day of the period reached 36.8 °C (on 18 November 2023) and the coldest 6.2 °C (on 18 July 2000).

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

Casimiro de AbreuRio de Janeiro

coords: -22.48°, -42.20°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthFebruaryColdest monthJulyWettest monthDecemberDriest monthJuly

Mean daily temperature

21.5°C

Average daily high

25.7°C

Average daily low

18.2°C

Annual rainfall

2,032mm

Sunshine / day

9.9h

Mean relative humidity

83%

Average peak wind

12.0km/h

Seasonal range

6.0°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

41 d/yr

Rainy days (≥ 1 mm)

193 d/yr

Annual snowfall

0.0 cm

Average feels-like high

28.7 °C

Average feels-like low

19.7 °C

Average peak gust

31.7 km/h

Tropical nights (≥ 20 °C)

120 d/yr

Solar radiation

17.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.6 °C

since 1940

+0.2 °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

36.8 °C

18 November 2023

Coldest day

6.2 °C

18 July 2000

Wettest day

181 mm

8 December 1946

Windiest day

33.4 km/h

31 July 1987

Strongest gust

75.6 km/h

11 August 2022

Hottest feels-like

44.5 °C

12 November 2013

Coldest feels-like

4.6 °C

18 July 2000

Sunniest day

13.4 h

1 January 1955

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.4 °C17 February 2025	9.1 °C14 June 2025	21.6 °C	1,478 mm	61
2024	34.5 °C28 November 2024	8.6 °C14 August 2024	22.5 °C	1,864 mm	68
2023	36.8 °C18 November 2023	9.8 °C8 July 2023	22.1 °C	1,789 mm	77
2022	34.2 °C27 January 2022	8.9 °C31 August 2022	21.5 °C	2,066 mm	50
2021	33.7 °C14 September 2021	8.6 °C2 July 2021	21.2 °C	1,706 mm	48
2020	35.6 °C2 October 2020	10.3 °C27 May 2020	21.7 °C	2,390 mm	46
2019	34.9 °C5 November 2019	9.2 °C12 July 2019	22.6 °C	1,755 mm	85
2018	33.9 °C16 March 2018	9.9 °C22 May 2018	22.3 °C	2,087 mm	60
2017	33.2 °C5 January 2017	10.7 °C4 July 2017	22.1 °C	1,395 mm	73
2016	34.0 °C10 February 2016	7.9 °C15 June 2016	22.4 °C	1,787 mm	103
2015	34.2 °C25 September 2015	11.1 °C5 August 2015	22.8 °C	1,621 mm	93
2014	33.5 °C3 January 2014	9.1 °C8 August 2014	22.1 °C	1,339 mm	72
2013	36.0 °C12 November 2013	10.1 °C8 July 2013	21.8 °C	2,134 mm	54
2012	34.4 °C19 September 2012	8.9 °C10 July 2012	21.9 °C	1,672 mm	59
2011	33.1 °C10 February 2011	8.6 °C6 June 2011	21.4 °C	1,754 mm	50
2010	35.1 °C8 February 2010	9.6 °C8 June 2010	22.2 °C	1,784 mm	91
2009	33.6 °C3 December 2009	7.9 °C4 June 2009	22.2 °C	2,475 mm	69
2008	34.2 °C19 January 2008	10.5 °C15 July 2008	21.4 °C	2,641 mm	41
2007	34.9 °C1 November 2007	8.8 °C31 July 2007	21.9 °C	1,962 mm	56
2006	33.9 °C22 January 2006	10.9 °C6 September 2006	21.9 °C	1,672 mm	57
2005	34.2 °C14 October 2005	12.3 °C9 July 2005	22.2 °C	2,149 mm	53
2004	32.5 °C5 February 2004	10.4 °C11 August 2004	21.6 °C	2,137 mm	36
2003	34.3 °C16 December 2003	10.9 °C17 October 2003	22.1 °C	2,004 mm	80
2002	34.0 °C1 December 2002	11.8 °C3 September 2002	22.6 °C	1,678 mm	81
2001	32.3 °C15 February 2001	11.6 °C19 September 2001	22.1 °C	1,633 mm	60
2000	32.4 °C15 January 2000	6.2 °C18 July 2000	21.5 °C	1,657 mm	45
1999	33.4 °C29 March 1999	10.1 °C12 July 1999	21.1 °C	1,640 mm	40
1998	33.7 °C5 February 1998	10.4 °C9 June 1998	22.0 °C	1,947 mm	63
1997	34.6 °C9 September 1997	10.4 °C3 June 1997	21.9 °C	1,770 mm	61
1996	34.6 °C18 January 1996	9.5 °C23 July 1996	21.4 °C	1,967 mm	58
1995	35.4 °C10 January 1995	11.4 °C8 June 1995	22.0 °C	2,248 mm	65
1994	34.3 °C17 February 1994	7.4 °C27 June 1994	22.1 °C	2,043 mm	74
1993	33.7 °C7 September 1993	11.2 °C23 June 1993	22.2 °C	1,684 mm	69
1992	34.2 °C22 February 1992	10.4 °C26 July 1992	21.9 °C	2,086 mm	38
1991	33.1 °C10 August 1991	11.1 °C4 September 1991	21.7 °C	2,037 mm	28
1990	33.3 °C21 January 1990	11.3 °C26 September 1990	22.0 °C	1,478 mm	45
1989	32.1 °C22 February 1989	10.3 °C18 July 1989	21.5 °C	2,079 mm	19
1988	33.2 °C1 April 1988	8.0 °C6 June 1988	21.5 °C	2,101 mm	37
1987	33.2 °C9 January 1987	10.0 °C24 August 1987	22.0 °C	2,201 mm	38
1986	32.7 °C18 January 1986	10.7 °C2 September 1986	22.0 °C	1,760 mm	37
1985	32.9 °C4 February 1985	9.5 °C15 June 1985	21.3 °C	2,135 mm	21
1984	33.4 °C20 January 1984	10.9 °C1 August 1984	22.0 °C	1,605 mm	38
1983	32.8 °C11 March 1983	9.1 °C7 August 1983	21.8 °C	2,618 mm	26
1982	31.6 °C18 September 1982	10.8 °C6 May 1982	21.5 °C	2,160 mm	17
1981	32.4 °C3 March 1981	10.8 °C6 July 1981	21.4 °C	1,941 mm	28
1980	32.8 °C27 October 1980	11.2 °C28 June 1980	21.7 °C	1,828 mm	26
1979	31.9 °C15 December 1979	8.6 °C1 June 1979	21.0 °C	2,336 mm	13
1978	32.8 °C31 January 1978	8.4 °C2 June 1978	21.4 °C	1,718 mm	30
1977	33.1 °C28 February 1977	11.0 °C21 May 1977	22.0 °C	1,609 mm	38
1976	32.7 °C26 January 1976	11.2 °C16 August 1976	21.4 °C	2,083 mm	25
1975	32.8 °C9 December 1975	8.2 °C8 July 1975	21.2 °C	2,240 mm	29
1974	32.1 °C26 November 1974	10.0 °C16 June 1974	21.4 °C	1,719 mm	26
1973	33.4 °C24 January 1973	10.8 °C20 June 1973	21.9 °C	2,226 mm	43
1972	33.3 °C6 January 1972	11.1 °C29 July 1972	21.7 °C	2,052 mm	28
1971	33.1 °C31 January 1971	11.0 °C1 June 1971	21.4 °C	1,796 mm	46
1970	32.1 °C18 November 1970	12.4 °C12 July 1970	21.3 °C	1,338 mm	27
1969	34.7 °C17 February 1969	11.1 °C19 July 1969	21.4 °C	1,784 mm	34
1968	33.9 °C24 December 1968	10.1 °C18 May 1968	20.3 °C	1,542 mm	25
1967	32.2 °C3 December 1967	11.2 °C10 June 1967	21.5 °C	2,299 mm	21
1966	33.4 °C5 December 1966	11.1 °C24 September 1966	21.1 °C	2,657 mm	34
1965	32.4 °C21 December 1965	10.4 °C12 July 1965	21.0 °C	2,734 mm	19
1964	31.9 °C18 February 1964	10.6 °C23 July 1964	20.2 °C	2,767 mm	11
1963	34.0 °C1 November 1963	10.8 °C14 July 1963	21.3 °C	1,361 mm	42
1962	31.8 °C18 February 1962	9.6 °C26 August 1962	20.2 °C	2,876 mm	7
1961	34.5 °C28 September 1961	12.7 °C8 August 1961	21.7 °C	2,271 mm	40
1960	34.0 °C24 September 1960	9.8 °C14 July 1960	20.6 °C	2,426 mm	19
1959	32.7 °C26 February 1959	10.2 °C13 June 1959	21.4 °C	1,861 mm	40
1958	33.0 °C16 November 1958	9.7 °C22 September 1958	21.2 °C	1,853 mm	40
1957	32.7 °C19 October 1957	10.7 °C23 July 1957	20.9 °C	2,290 mm	21
1956	34.3 °C27 January 1956	10.5 °C13 August 1956	20.2 °C	1,727 mm	38
1955	32.5 °C1 October 1955	9.9 °C4 August 1955	20.7 °C	1,544 mm	32
1954	33.9 °C22 September 1954	10.8 °C29 July 1954	21.2 °C	2,530 mm	27
1953	32.3 °C30 January 1953	11.0 °C27 July 1953	21.1 °C	2,385 mm	22
1952	32.3 °C6 February 1952	11.6 °C9 July 1952	20.9 °C	2,833 mm	11
1951	34.2 °C23 November 1951	10.5 °C21 June 1951	20.7 °C	1,684 mm	37
1950	32.4 °C20 February 1950	10.0 °C14 July 1950	20.7 °C	2,491 mm	18
1949	31.2 °C18 March 1949	9.0 °C27 August 1949	20.4 °C	2,538 mm	11
1948	33.7 °C27 January 1948	10.9 °C30 August 1948	20.9 °C	1,742 mm	39
1947	33.7 °C15 January 1947	8.1 °C4 August 1947	20.6 °C	2,172 mm	36
1946	32.3 °C12 December 1946	11.2 °C30 July 1946	21.4 °C	2,468 mm	26
1945	32.5 °C13 November 1945	11.1 °C13 July 1945	21.2 °C	2,337 mm	21
1944	32.9 °C28 September 1944	10.3 °C22 August 1944	20.9 °C	2,618 mm	21
1943	31.1 °C19 January 1943	9.8 °C25 July 1943	19.9 °C	2,481 mm	5
1942	33.6 °C7 October 1942	8.0 °C23 August 1942	20.2 °C	2,011 mm	19
1941	33.1 °C13 January 1941	9.5 °C1 July 1941	21.1 °C	2,735 mm	18
1940	32.5 °C23 August 1940	11.1 °C27 September 1940	21.3 °C	2,673 mm	19

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

26.2 °C

+0.5 °C

Hot days (≥ 30 °C)

61 d/yr

+20

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1478 mm

-554 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.9 °C	+0.6 °C	250 mm	-50 mm
Feb	31.1 °C	+2.5 °C	12 mm	-220 mm
Mar	28.4 °C	+0.8 °C	208 mm	-41 mm
Apr	26.0 °C	0.0 °C	161 mm	+22 mm
May	25.3 °C	+1.1 °C	23 mm	-57 mm
Jun	24.5 °C	+1.0 °C	42 mm	-10 mm
Jul	22.4 °C	-0.8 °C	41 mm	-7 mm
Aug	23.9 °C	-0.1 °C	27 mm	-29 mm
Sep	24.5 °C	-0.1 °C	75 mm	-26 mm
Oct	24.9 °C	-0.4 °C	178 mm	+1 mm
Nov	25.7 °C	0.0 °C	161 mm	-109 mm
Dec	28.7 °C	+1.7 °C	300 mm	-27 mm

The year's extremes

Hottest day

34.4 °C

17 Feb 2025

Coldest day

9.1 °C

14 Jun 2025

Wettest day

74.3 mm

15 Dec 2025

Windiest day

27.5 km/h

19 Nov 2025

Strongest gust

63.0 km/h

10 Dec 2025

Hottest feels-like

41.4 °C

20 Jan 2025

Coldest feels-like

7.8 °C

14 Jun 2025

Sunniest day

13.3 h

28 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 Casimiro de Abreu?

Casimiro de Abreu has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 2,032 mm of precipitation per year.

What is the hottest day ever recorded in Casimiro de Abreu?

The hottest day measured in Casimiro de Abreu between 1940 and 2025 was 18 November 2023, reaching 36.8 °C.

What is the coldest day in Casimiro de Abreu?

The coldest day measured in Casimiro de Abreu between 1940 and 2025 was 18 July 2000, at 6.2 °C.

Does it snow in Casimiro de Abreu?

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

Has the climate of Casimiro de Abreu warmed?

Yes: Casimiro de Abreu warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Casimiro de Abreu?

The wettest day measured in Casimiro de Abreu between 1940 and 2025 was 8 December 1946, with 181 mm of rain in 24 hours.

What was the windiest day in Casimiro de Abreu?

The windiest day measured in Casimiro de Abreu between 1940 and 2025 was 31 July 1987, with winds reaching 33.4 km/h.

What is the warmest month in Casimiro de Abreu?

The warmest month in Casimiro de Abreu is February (24.5 °C on average); the coldest is July (18.5 °C).

How much does it rain in Casimiro de Abreu?

Casimiro de Abreu receives on average 2,032 mm of precipitation per year, spread over about 193 rainy days.

Is it sunny in Casimiro de Abreu?

Casimiro de Abreu gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Are there tropical nights in Casimiro de Abreu?

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

What was the most extreme apparent temperature in Casimiro de Abreu?

In Casimiro de Abreu, between 1940 and 2025, the highest apparent temperature reached 44.5 °C on 12 November 2013, and the lowest was 4.6 °C on 18 July 2000.

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