Arcos climate — normals and trends

Q: What is the climate of Arcos?

Arcos has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 21.3 °C and it receives 1,326 mm of precipitation per year.

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

The hottest day measured in Arcos between 1940 and 2025 was 25 September 2023, reaching 38.0 °C.

Q: What is the coldest day in Arcos?

The coldest day measured in Arcos between 1940 and 2025 was 1 June 1979, at 2.6 °C.

Q: Does it snow in Arcos?

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

Q: Has the climate of Arcos warmed?

Yes: Arcos warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Arcos?

The wettest day measured in Arcos between 1940 and 2025 was 12 January 1966, with 126 mm of rain in 24 hours.

Q: What was the windiest day in Arcos?

The windiest day measured in Arcos between 1940 and 2025 was 3 July 1976, with winds reaching 29.3 km/h.

Q: What is the warmest month in Arcos?

The warmest month in Arcos is February (23.2 °C on average); the coldest is June (18.2 °C).

Q: How much does it rain in Arcos?

Arcos receives on average 1,326 mm of precipitation per year, spread over about 148 rainy days.

Q: Is it sunny in Arcos?

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

Arcos (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 21.3 °C and it receives 1,326 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 (23.2 °C on average) and the coldest is June (18.2 °C). Rainfall peaks in December.

Arcos averages 0 frost days, 46 hot days (≥ 30 °C) and 148 rainy days per year.

Arcos has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.0 °C (on 25 September 2023) and the coldest 2.6 °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

ArcosMinas Gerais

coords: -20.28°, -45.54°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthFebruaryColdest monthJuneWettest monthDecemberDriest monthJuly

Mean daily temperature

21.3°C

Average daily high

26.6°C

Average daily low

16.9°C

Annual rainfall

1,326mm

Sunshine / day

9.9h

Mean relative humidity

72%

Average peak wind

12.3km/h

Seasonal range

5.0°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

46 d/yr

Rainy days (≥ 1 mm)

148 d/yr

Annual snowfall

0.0 cm

Average feels-like high

28.6 °C

Average feels-like low

17.4 °C

Average peak gust

28.8 km/h

Tropical nights (≥ 20 °C)

42 d/yr

Solar radiation

18.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °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

38.0 °C

25 September 2023

Coldest day

2.6 °C

1 June 1979

Wettest day

126 mm

12 January 1966

Windiest day

29.3 km/h

3 July 1976

Strongest gust

69.5 km/h

16 September 1976

Hottest feels-like

40.0 °C

11 November 1997

Coldest feels-like

-0.4 °C

1 June 1979

Sunniest day

13.2 h

24 December 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	35.1 °C7 October 2025	6.2 °C25 June 2025	22.1 °C	825 mm	105
2024	36.8 °C8 October 2024	7.3 °C11 August 2024	22.8 °C	1,183 mm	109
2023	38.0 °C25 September 2023	9.4 °C4 July 2023	22.5 °C	988 mm	110
2022	34.2 °C11 September 2022	5.1 °C20 May 2022	21.5 °C	1,370 mm	75
2021	36.2 °C21 September 2021	5.2 °C30 July 2021	21.8 °C	1,025 mm	68
2020	37.4 °C3 October 2020	6.9 °C27 May 2020	21.9 °C	1,176 mm	74
2019	35.7 °C13 September 2019	7.8 °C7 July 2019	22.5 °C	966 mm	102
2018	33.6 °C24 September 2018	6.6 °C21 May 2018	22.1 °C	1,093 mm	67
2017	35.5 °C15 October 2017	9.5 °C4 July 2017	22.5 °C	805 mm	103
2016	35.7 °C19 October 2016	6.1 °C18 July 2016	22.7 °C	1,218 mm	114
2015	37.1 °C17 October 2015	11.4 °C13 August 2015	22.8 °C	1,056 mm	122
2014	37.4 °C15 October 2014	9.0 °C8 August 2014	22.6 °C	754 mm	126
2013	34.4 °C23 September 2013	9.5 °C8 July 2013	21.5 °C	1,188 mm	57
2012	35.3 °C29 October 2012	7.2 °C20 July 2012	21.7 °C	1,074 mm	61
2011	33.4 °C2 October 2011	8.8 °C5 August 2011	21.4 °C	1,344 mm	56
2010	32.8 °C6 October 2010	7.8 °C13 June 2010	21.6 °C	1,125 mm	69
2009	32.3 °C16 November 2009	8.1 °C3 June 2009	21.7 °C	1,524 mm	36
2008	34.0 °C16 October 2008	8.4 °C14 July 2008	21.5 °C	1,615 mm	55
2007	36.4 °C24 September 2007	8.3 °C31 July 2007	22.0 °C	1,172 mm	71
2006	33.8 °C25 January 2006	10.4 °C16 June 2006	21.4 °C	1,061 mm	38
2005	34.9 °C17 October 2005	9.2 °C9 July 2005	21.7 °C	1,241 mm	43
2004	33.8 °C29 September 2004	9.2 °C5 June 2004	21.3 °C	1,359 mm	42
2003	34.7 °C25 September 2003	8.8 °C3 July 2003	21.6 °C	1,214 mm	55
2002	35.1 °C12 October 2002	8.4 °C3 September 2002	22.5 °C	1,148 mm	78
2001	33.0 °C4 February 2001	9.1 °C19 May 2001	21.9 °C	1,070 mm	62
2000	34.6 °C21 October 2000	5.0 °C18 July 2000	21.3 °C	1,209 mm	39
1999	33.4 °C16 October 1999	7.8 °C21 May 1999	21.2 °C	1,192 mm	55
1998	32.7 °C1 January 1998	8.3 °C8 June 1998	21.8 °C	1,118 mm	69
1997	34.8 °C4 November 1997	5.7 °C9 June 1997	21.6 °C	1,444 mm	59
1996	32.6 °C28 August 1996	7.5 °C13 July 1996	21.4 °C	1,373 mm	71
1995	34.6 °C18 January 1995	8.5 °C9 June 1995	21.7 °C	1,477 mm	70
1994	34.7 °C3 October 1994	4.7 °C27 June 1994	21.9 °C	1,267 mm	74
1993	34.8 °C30 November 1993	8.2 °C20 June 1993	21.8 °C	1,023 mm	54
1992	30.9 °C7 April 1992	11.1 °C16 June 1992	21.2 °C	1,555 mm	10
1991	31.3 °C10 August 1991	10.0 °C8 July 1991	21.3 °C	1,591 mm	24
1990	34.0 °C12 October 1990	6.8 °C20 May 1990	22.0 °C	989 mm	61
1989	32.0 °C25 September 1989	7.0 °C10 July 1989	21.2 °C	1,236 mm	20
1988	34.3 °C30 January 1988	6.2 °C6 June 1988	21.5 °C	1,191 mm	41
1987	35.9 °C17 October 1987	7.2 °C9 August 1987	22.0 °C	1,059 mm	71
1986	35.9 °C18 October 1986	8.0 °C7 June 1986	21.7 °C	1,138 mm	54
1985	32.6 °C18 November 1985	4.4 °C9 June 1985	21.1 °C	1,423 mm	36
1984	33.4 °C9 November 1984	10.1 °C1 August 1984	21.9 °C	1,087 mm	62
1983	31.0 °C11 March 1983	7.9 °C5 August 1983	21.2 °C	1,806 mm	12
1982	33.1 °C24 November 1982	10.5 °C27 May 1982	21.3 °C	1,625 mm	30
1981	33.1 °C4 March 1981	5.2 °C22 July 1981	20.9 °C	1,414 mm	25
1980	34.6 °C28 October 1980	9.2 °C15 June 1980	21.5 °C	1,241 mm	33
1979	33.3 °C28 October 1979	2.6 °C1 June 1979	20.9 °C	1,574 mm	19
1978	32.7 °C21 January 1978	6.0 °C16 August 1978	21.0 °C	1,366 mm	23
1977	32.7 °C2 March 1977	8.7 °C18 May 1977	21.7 °C	1,143 mm	41
1976	32.2 °C13 January 1976	7.3 °C6 July 1976	20.9 °C	1,489 mm	16
1975	32.9 °C3 October 1975	6.4 °C8 July 1975	21.1 °C	1,194 mm	32
1974	33.1 °C30 August 1974	8.2 °C30 June 1974	21.2 °C	1,124 mm	44
1973	33.2 °C19 September 1973	6.4 °C20 June 1973	21.7 °C	1,254 mm	42
1972	33.2 °C26 October 1972	6.2 °C9 July 1972	21.3 °C	1,243 mm	28
1971	33.4 °C26 January 1971	8.0 °C2 June 1971	21.3 °C	1,292 mm	44
1970	33.3 °C24 December 1970	10.0 °C17 July 1970	21.5 °C	772 mm	34
1969	33.2 °C11 January 1969	8.4 °C5 June 1969	21.8 °C	905 mm	59
1968	33.6 °C9 October 1968	6.9 °C18 May 1968	20.4 °C	839 mm	31
1967	33.5 °C13 October 1967	8.5 °C20 July 1967	21.4 °C	1,216 mm	30
1966	34.4 °C16 September 1966	9.9 °C28 May 1966	20.9 °C	1,727 mm	14
1965	31.7 °C11 September 1965	3.8 °C12 July 1965	20.2 °C	1,902 mm	15
1964	31.5 °C2 September 1964	8.6 °C28 July 1964	20.1 °C	1,856 mm	3
1963	37.5 °C18 October 1963	8.8 °C23 June 1963	22.1 °C	860 mm	84
1962	33.0 °C12 September 1962	8.5 °C18 June 1962	20.2 °C	2,289 mm	16
1961	36.3 °C28 September 1961	10.7 °C16 July 1961	21.7 °C	1,495 mm	66
1960	36.1 °C26 September 1960	7.6 °C14 July 1960	20.5 °C	1,823 mm	24
1959	33.2 °C27 February 1959	9.3 °C20 June 1959	21.4 °C	1,135 mm	46
1958	34.3 °C7 October 1958	8.6 °C22 June 1958	21.0 °C	1,110 mm	52
1957	35.1 °C20 October 1957	6.1 °C21 July 1957	20.7 °C	1,401 mm	34
1956	33.3 °C27 January 1956	7.8 °C18 August 1956	20.2 °C	1,246 mm	43
1955	35.3 °C2 October 1955	8.6 °C23 May 1955	21.4 °C	1,063 mm	45
1954	33.9 °C20 September 1954	10.4 °C30 August 1954	21.0 °C	1,574 mm	31
1953	30.9 °C22 August 1953	10.1 °C28 July 1953	20.7 °C	1,572 mm	2
1952	32.8 °C4 September 1952	7.1 °C16 July 1952	20.5 °C	1,924 mm	17
1951	33.6 °C20 November 1951	9.5 °C3 June 1951	20.5 °C	1,305 mm	23
1950	34.5 °C20 September 1950	8.2 °C11 June 1950	20.4 °C	1,675 mm	12
1949	33.2 °C8 October 1949	8.8 °C3 July 1949	20.7 °C	1,629 mm	29
1948	34.1 °C27 September 1948	10.3 °C4 August 1948	20.9 °C	1,088 mm	23
1947	32.8 °C10 January 1947	8.2 °C8 July 1947	20.5 °C	1,469 mm	15
1946	31.5 °C4 November 1946	8.9 °C27 July 1946	20.9 °C	1,335 mm	12
1945	31.7 °C30 August 1945	10.1 °C26 June 1945	20.5 °C	2,070 mm	7
1944	32.0 °C16 September 1944	9.6 °C24 August 1944	20.2 °C	2,029 mm	15
1943	28.7 °C17 January 1943	9.3 °C15 July 1943	19.2 °C	1,892 mm	0
1942	35.9 °C29 November 1942	5.8 °C26 June 1942	20.3 °C	1,011 mm	41
1941	30.8 °C13 January 1941	9.1 °C9 June 1941	20.3 °C	2,118 mm	2
1940	31.4 °C25 August 1940	11.4 °C10 June 1940	20.6 °C	1,997 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

28.0 °C

+1.4 °C

Hot days (≥ 30 °C)

105 d/yr

+59

Frost days (< 0 °C)

0 d/yr

Annual rainfall

825 mm

-501 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.5 °C	+0.9 °C	274 mm	+32 mm
Feb	30.1 °C	+2.2 °C	45 mm	-124 mm
Mar	29.6 °C	+2.2 °C	92 mm	-71 mm
Apr	26.9 °C	+0.5 °C	91 mm	+27 mm
May	25.4 °C	+0.7 °C	3 mm	-32 mm
Jun	25.4 °C	+1.4 °C	6 mm	-10 mm
Jul	25.2 °C	+1.0 °C	3 mm	-10 mm
Aug	27.1 °C	+0.7 °C	5 mm	-8 mm
Sep	29.7 °C	+1.5 °C	11 mm	-36 mm
Oct	29.1 °C	+1.0 °C	50 mm	-64 mm
Nov	29.4 °C	+2.2 °C	96 mm	-99 mm
Dec	29.8 °C	+2.8 °C	150 mm	-106 mm

The year's extremes

Hottest day

35.1 °C

7 Oct 2025

Coldest day

6.2 °C

25 Jun 2025

Wettest day

40.3 mm

29 Jan 2025

Windiest day

24.0 km/h

22 Sep 2025

Strongest gust

62.3 km/h

10 Dec 2025

Hottest feels-like

38.9 °C

28 Dec 2025

Coldest feels-like

4.1 °C

25 Jun 2025

Sunniest day

13.2 h

24 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 Arcos?

Arcos has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 21.3 °C and it receives 1,326 mm of precipitation per year.

What is the hottest day ever recorded in Arcos?

The hottest day measured in Arcos between 1940 and 2025 was 25 September 2023, reaching 38.0 °C.

What is the coldest day in Arcos?

The coldest day measured in Arcos between 1940 and 2025 was 1 June 1979, at 2.6 °C.

Does it snow in Arcos?

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

Has the climate of Arcos warmed?

Yes: Arcos warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Arcos?

The wettest day measured in Arcos between 1940 and 2025 was 12 January 1966, with 126 mm of rain in 24 hours.

What was the windiest day in Arcos?

The windiest day measured in Arcos between 1940 and 2025 was 3 July 1976, with winds reaching 29.3 km/h.

What is the warmest month in Arcos?

The warmest month in Arcos is February (23.2 °C on average); the coldest is June (18.2 °C).

How much does it rain in Arcos?

Arcos receives on average 1,326 mm of precipitation per year, spread over about 148 rainy days.

Is it sunny in Arcos?

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

Are there tropical nights in Arcos?

Yes: Arcos has on average 42 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Arcos?

In Arcos, between 1940 and 2025, the highest apparent temperature reached 40.0 °C on 11 November 1997, and the lowest was -0.4 °C on 1 June 1979.

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