Santo Antônio do Içá climate — normals and trends

Q: What is the climate of Santo Antônio do Içá?

Santo Antônio do Içá has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 2,712 mm of precipitation per year.

Q: What is the hottest day ever recorded in Santo Antônio do Içá?

The hottest day measured in Santo Antônio do Içá between 1940 and 2025 was 3 October 2023, reaching 37.8 °C.

Q: What is the coldest day in Santo Antônio do Içá?

The coldest day measured in Santo Antônio do Içá between 1940 and 2025 was 1 August 1955, at 16.9 °C.

Q: Does it snow in Santo Antônio do Içá?

Almost never: Santo Antônio do Içá sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Santo Antônio do Içá warmed?

Yes: Santo Antônio do Içá warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Santo Antônio do Içá?

The wettest day measured in Santo Antônio do Içá between 1940 and 2025 was 30 March 2021, with 159 mm of rain in 24 hours.

Q: What was the windiest day in Santo Antônio do Içá?

The windiest day measured in Santo Antônio do Içá between 1940 and 2025 was 31 May 1941, with winds reaching 19.1 km/h.

Q: What is the warmest month in Santo Antônio do Içá?

The warmest month in Santo Antônio do Içá is October (26.3 °C on average); the coldest is June (24.9 °C).

Q: How much does it rain in Santo Antônio do Içá?

Santo Antônio do Içá receives on average 2,712 mm of precipitation per year, spread over about 321 rainy days.

Q: Is it sunny in Santo Antônio do Içá?

Santo Antônio do Içá gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.

Santo Antônio do Içá (Brazil) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 25.7 °C and it receives 2,712 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 October (26.3 °C on average) and the coldest is June (24.9 °C). Rainfall peaks in April.

Santo Antônio do Içá averages 0 frost days, 159 hot days (≥ 30 °C) and 321 rainy days per year.

Santo Antônio do Içá has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.

The hottest day of the period reached 37.8 °C (on 3 October 2023) and the coldest 16.9 °C (on 1 August 1955).

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

Santo Antônio do IçáAmazonas

coords: -3.10°, -67.94°
period: 1940–2025 · 86 yrs

AfTropical rainforestWarmest monthOctoberColdest monthJuneWettest monthAprilDriest monthAugust

Mean daily temperature

25.7°C

Average daily high

29.7°C

Average daily low

23.1°C

Annual rainfall

2,712mm

Sunshine / day

8.9h

Mean relative humidity

89%

Average peak wind

7.3km/h

Seasonal range

1.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

159 d/yr

Rainy days (≥ 1 mm)

321 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.4 °C

Average feels-like low

27.7 °C

Average peak gust

25.2 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

16.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.3 °C

since 1940

+0.2 °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

37.8 °C

3 October 2023

Coldest day

16.9 °C

1 August 1955

Wettest day

159 mm

30 March 2021

Windiest day

19.1 km/h

31 May 1941

Strongest gust

50.0 km/h

5 February 1959

Hottest feels-like

45.6 °C

26 September 2005

Coldest feels-like

16.2 °C

19 July 1975

Sunniest day

12.1 h

17 December 2012

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	35.1 °C4 February 2025	21.1 °C2 July 2025	26.1 °C	3,386 mm	196
2024	37.0 °C2 November 2024	20.2 °C27 August 2024	26.8 °C	2,543 mm	270
2023	37.8 °C3 October 2023	19.5 °C16 June 2023	26.5 °C	2,716 mm	239
2022	36.6 °C6 October 2022	19.3 °C2 November 2022	26.1 °C	2,636 mm	216
2021	34.5 °C11 October 2021	18.6 °C1 July 2021	25.9 °C	3,069 mm	179
2020	35.3 °C8 September 2020	18.8 °C22 August 2020	26.3 °C	2,725 mm	241
2019	34.5 °C14 March 2019	19.1 °C6 August 2019	26.1 °C	2,933 mm	232
2018	34.6 °C1 March 2018	20.6 °C20 June 2018	25.9 °C	3,010 mm	191
2017	34.6 °C1 December 2017	18.8 °C20 July 2017	26.2 °C	2,805 mm	229
2016	35.2 °C3 November 2016	20.2 °C29 April 2016	26.5 °C	2,768 mm	245
2015	35.5 °C10 September 2015	22.0 °C13 September 2015	26.4 °C	3,025 mm	263
2014	35.0 °C31 October 2014	20.4 °C30 June 2014	26.1 °C	3,265 mm	233
2013	34.5 °C12 April 2013	18.4 °C25 July 2013	26.0 °C	2,815 mm	233
2012	34.6 °C22 September 2012	20.4 °C7 August 2012	25.9 °C	3,026 mm	212
2011	35.1 °C31 August 2011	20.4 °C22 August 2011	26.1 °C	3,073 mm	239
2010	35.3 °C14 September 2010	17.8 °C19 July 2010	26.5 °C	2,403 mm	276
2009	35.6 °C10 September 2009	21.6 °C26 July 2009	26.3 °C	2,848 mm	247
2008	36.6 °C30 September 2008	20.7 °C26 June 2008	26.0 °C	2,838 mm	232
2007	35.0 °C18 February 2007	20.7 °C10 May 2007	26.2 °C	2,564 mm	260
2006	35.3 °C30 October 2006	21.3 °C6 September 2006	26.2 °C	2,513 mm	255
2005	36.1 °C26 September 2005	20.3 °C20 July 2005	26.4 °C	2,690 mm	274
2004	35.5 °C14 October 2004	20.1 °C14 June 2004	26.1 °C	2,476 mm	254
2003	34.7 °C23 October 2003	20.1 °C12 September 2003	26.0 °C	2,805 mm	250
2002	34.5 °C23 September 2002	21.6 °C8 July 2002	25.9 °C	2,511 mm	236
2001	35.1 °C10 October 2001	17.7 °C20 June 2001	25.7 °C	2,732 mm	216
2000	33.9 °C26 October 2000	18.9 °C14 July 2000	25.6 °C	2,987 mm	205
1999	34.5 °C17 November 1999	18.2 °C16 August 1999	25.5 °C	2,818 mm	151
1998	34.5 °C29 September 1998	21.6 °C22 September 1998	26.3 °C	2,608 mm	238
1997	34.1 °C17 October 1997	20.2 °C10 August 1997	25.9 °C	2,816 mm	205
1996	33.4 °C10 September 1996	18.1 °C1 July 1996	25.6 °C	2,938 mm	172
1995	34.1 °C9 October 1995	20.3 °C22 June 1995	26.0 °C	2,522 mm	214
1994	33.5 °C4 December 1994	20.0 °C28 June 1994	25.6 °C	3,091 mm	156
1993	32.5 °C14 February 1993	19.8 °C15 July 1993	25.5 °C	3,082 mm	119
1992	33.5 °C2 February 1992	20.0 °C26 July 1992	25.7 °C	2,610 mm	169
1991	34.1 °C16 January 1991	20.2 °C4 August 1991	25.7 °C	2,736 mm	151
1990	33.1 °C13 October 1990	20.2 °C24 July 1990	25.6 °C	2,801 mm	152
1989	33.2 °C17 November 1989	18.7 °C10 July 1989	25.5 °C	3,007 mm	153
1988	34.2 °C14 February 1988	19.6 °C3 June 1988	25.8 °C	2,991 mm	172
1987	33.7 °C5 March 1987	20.7 °C26 May 1987	25.9 °C	2,763 mm	192
1986	33.6 °C7 October 1986	20.5 °C24 July 1986	25.4 °C	3,076 mm	143
1985	32.9 °C17 April 1985	18.7 °C11 June 1985	25.4 °C	2,641 mm	153
1984	33.1 °C27 February 1984	18.4 °C27 August 1984	25.4 °C	2,758 mm	159
1983	33.9 °C28 January 1983	20.3 °C3 August 1983	26.1 °C	2,562 mm	233
1982	33.2 °C16 September 1982	20.2 °C3 August 1982	25.7 °C	2,455 mm	160
1981	34.0 °C7 November 1981	17.6 °C20 July 1981	25.7 °C	2,763 mm	168
1980	34.5 °C29 February 1980	19.1 °C5 July 1980	25.8 °C	2,555 mm	179
1979	33.3 °C22 January 1979	20.7 °C1 June 1979	25.7 °C	2,513 mm	174
1978	33.8 °C13 February 1978	18.1 °C17 August 1978	25.5 °C	2,625 mm	144
1977	33.7 °C23 January 1977	20.8 °C18 May 1977	25.6 °C	2,801 mm	191
1976	33.6 °C14 September 1976	20.0 °C12 July 1976	25.2 °C	2,873 mm	147
1975	33.6 °C26 November 1975	17.0 °C19 July 1975	25.1 °C	3,119 mm	122
1974	34.0 °C25 October 1974	20.7 °C14 June 1974	25.1 °C	2,727 mm	117
1973	34.0 °C17 October 1973	21.5 °C3 August 1973	25.7 °C	3,116 mm	164
1972	33.6 °C3 October 1972	21.2 °C6 August 1972	25.4 °C	3,084 mm	139
1971	33.1 °C1 February 1971	21.3 °C17 June 1971	25.1 °C	2,875 mm	102
1970	33.7 °C26 October 1970	21.1 °C10 July 1970	25.7 °C	2,684 mm	161
1969	33.5 °C28 April 1969	18.4 °C11 July 1969	25.9 °C	2,472 mm	177
1968	32.8 °C22 February 1968	18.9 °C17 May 1968	25.2 °C	2,684 mm	116
1967	32.7 °C13 March 1967	21.2 °C23 July 1967	25.3 °C	2,497 mm	113
1966	34.0 °C7 February 1966	21.3 °C6 June 1966	25.6 °C	2,685 mm	130
1965	34.5 °C9 February 1965	18.3 °C21 August 1965	25.3 °C	2,273 mm	103
1964	34.5 °C10 February 1964	21.0 °C24 July 1964	25.5 °C	2,431 mm	111
1963	33.7 °C30 September 1963	21.5 °C21 June 1963	25.8 °C	2,076 mm	148
1962	33.6 °C5 October 1962	20.4 °C8 July 1962	25.4 °C	2,262 mm	118
1961	32.5 °C15 March 1961	21.1 °C18 June 1961	25.6 °C	2,331 mm	134
1960	33.6 °C2 February 1960	20.6 °C11 July 1960	25.5 °C	2,240 mm	114
1959	33.4 °C14 October 1959	21.5 °C27 June 1959	25.4 °C	2,368 mm	107
1958	33.7 °C8 February 1958	21.8 °C26 June 1958	25.7 °C	2,653 mm	124
1957	34.0 °C29 September 1957	19.9 °C21 July 1957	25.6 °C	2,294 mm	128
1956	31.9 °C29 February 1956	20.8 °C29 July 1956	24.7 °C	3,003 mm	29
1955	31.6 °C10 October 1955	16.9 °C1 August 1955	25.1 °C	2,370 mm	71
1954	32.4 °C18 February 1954	21.2 °C9 July 1954	25.1 °C	2,684 mm	60
1953	32.2 °C2 March 1953	21.4 °C11 July 1953	25.4 °C	2,582 mm	100
1952	32.5 °C9 March 1952	21.5 °C23 July 1952	25.3 °C	2,601 mm	78
1951	32.0 °C14 October 1951	21.3 °C13 July 1951	25.2 °C	2,785 mm	58
1950	31.9 °C6 October 1950	21.0 °C4 August 1950	25.1 °C	2,695 mm	58
1949	31.3 °C8 March 1949	21.2 °C17 July 1949	25.0 °C	2,563 mm	44
1948	32.2 °C5 October 1948	21.0 °C30 July 1948	25.3 °C	2,069 mm	83
1947	32.2 °C22 February 1947	20.8 °C20 May 1947	25.0 °C	3,030 mm	53
1946	31.8 °C19 February 1946	20.9 °C7 August 1946	24.8 °C	2,729 mm	34
1945	31.5 °C25 August 1945	21.2 °C26 May 1945	25.1 °C	2,550 mm	70
1944	31.6 °C30 August 1944	21.5 °C1 July 1944	25.2 °C	2,474 mm	57
1943	31.0 °C12 March 1943	20.8 °C19 June 1943	24.5 °C	2,852 mm	26
1942	31.3 °C13 February 1942	20.0 °C20 June 1942	24.7 °C	2,763 mm	29
1941	33.0 °C10 February 1941	21.4 °C20 July 1941	25.3 °C	2,868 mm	72
1940	34.1 °C4 March 1940	21.6 °C3 July 1940	25.5 °C	2,143 mm	103

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

30.1 °C

+0.4 °C

Hot days (≥ 30 °C)

196 d/yr

+37

Frost days (< 0 °C)

0 d/yr

Annual rainfall

3386 mm

+674 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.6 °C	+0.8 °C	280 mm	+17 mm
Feb	29.9 °C	0.0 °C	504 mm	+240 mm
Mar	30.7 °C	+0.9 °C	413 mm	+105 mm
Apr	30.2 °C	+0.9 °C	357 mm	+31 mm
May	29.2 °C	+0.4 °C	373 mm	+83 mm
Jun	29.4 °C	+0.8 °C	298 mm	+105 mm
Jul	29.5 °C	+0.7 °C	117 mm	-25 mm
Aug	30.3 °C	+0.4 °C	148 mm	+23 mm
Sep	31.0 °C	+0.5 °C	136 mm	-7 mm
Oct	30.3 °C	-0.4 °C	204 mm	+17 mm
Nov	30.0 °C	-0.3 °C	287 mm	+69 mm
Dec	30.1 °C	+0.2 °C	270 mm	+18 mm

The year's extremes

Hottest day

35.1 °C

4 Feb 2025

Coldest day

21.1 °C

2 Jul 2025

Wettest day

118.6 mm

18 Mar 2025

Windiest day

14.4 km/h

2 Jul 2025

Strongest gust

41.4 km/h

21 Mar 2025

Hottest feels-like

41.9 °C

4 Feb 2025

Coldest feels-like

22.1 °C

2 Jul 2025

Sunniest day

11.9 h

9 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 Santo Antônio do Içá?

Santo Antônio do Içá has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 2,712 mm of precipitation per year.

What is the hottest day ever recorded in Santo Antônio do Içá?

The hottest day measured in Santo Antônio do Içá between 1940 and 2025 was 3 October 2023, reaching 37.8 °C.

What is the coldest day in Santo Antônio do Içá?

The coldest day measured in Santo Antônio do Içá between 1940 and 2025 was 1 August 1955, at 16.9 °C.

Does it snow in Santo Antônio do Içá?

Almost never: Santo Antônio do Içá sees virtually no snow, with about 0 frost days per year.

Has the climate of Santo Antônio do Içá warmed?

Yes: Santo Antônio do Içá warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Santo Antônio do Içá?

The wettest day measured in Santo Antônio do Içá between 1940 and 2025 was 30 March 2021, with 159 mm of rain in 24 hours.

What was the windiest day in Santo Antônio do Içá?

The windiest day measured in Santo Antônio do Içá between 1940 and 2025 was 31 May 1941, with winds reaching 19.1 km/h.

What is the warmest month in Santo Antônio do Içá?

The warmest month in Santo Antônio do Içá is October (26.3 °C on average); the coldest is June (24.9 °C).

How much does it rain in Santo Antônio do Içá?

Santo Antônio do Içá receives on average 2,712 mm of precipitation per year, spread over about 321 rainy days.

Is it sunny in Santo Antônio do Içá?

Santo Antônio do Içá gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.

Are there tropical nights in Santo Antônio do Içá?

Yes: Santo Antônio do Içá has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Santo Antônio do Içá?

In Santo Antônio do Içá, between 1940 and 2025, the highest apparent temperature reached 45.6 °C on 26 September 2005, and the lowest was 16.2 °C on 19 July 1975.

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