Fonte Boa climate — normals and trends

Q: What is the climate of Fonte Boa?

Fonte Boa has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 2,783 mm of precipitation per year.

Q: What is the hottest day ever recorded in Fonte Boa?

The hottest day measured in Fonte Boa between 1940 and 2025 was 28 September 2023, reaching 36.9 °C.

Q: What is the coldest day in Fonte Boa?

The coldest day measured in Fonte Boa between 1940 and 2025 was 19 July 1975, at 17.6 °C.

Q: Does it snow in Fonte Boa?

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

Q: Has the climate of Fonte Boa warmed?

Yes: Fonte Boa warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Fonte Boa?

The wettest day measured in Fonte Boa between 1940 and 2025 was 27 April 1980, with 203 mm of rain in 24 hours.

Q: What was the windiest day in Fonte Boa?

The windiest day measured in Fonte Boa between 1940 and 2025 was 20 August 1965, with winds reaching 18.7 km/h.

Q: What is the warmest month in Fonte Boa?

The warmest month in Fonte Boa is October (26.6 °C on average); the coldest is June (25.3 °C).

Q: How much does it rain in Fonte Boa?

Fonte Boa receives on average 2,783 mm of precipitation per year, spread over about 318 rainy days.

Q: Is it sunny in Fonte Boa?

Fonte Boa gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.

Fonte Boa (Brazil) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.0 °C and it receives 2,783 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 (26.6 °C on average) and the coldest is June (25.3 °C). Rainfall peaks in April.

Fonte Boa averages 0 frost days, 151 hot days (≥ 30 °C) and 318 rainy days per year.

Fonte Boa has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.

The hottest day of the period reached 36.9 °C (on 28 September 2023) and the coldest 17.6 °C (on 19 July 1975).

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

Fonte BoaAmazonas

coords: -2.51°, -66.09°
period: 1940–2025 · 86 yrs

AfTropical rainforestWarmest monthOctoberColdest monthJuneWettest monthAprilDriest monthAugust

Mean daily temperature

26.0°C

Average daily high

29.6°C

Average daily low

23.5°C

Annual rainfall

2,783mm

Sunshine / day

8.9h

Mean relative humidity

90%

Average peak wind

7.5km/h

Seasonal range

1.3°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

151 d/yr

Rainy days (≥ 1 mm)

318 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.5 °C

Average feels-like low

28.4 °C

Average peak gust

25.9 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

16.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.5 °C

since 1940

+0.2 °C per decade · r² = 0.71 · 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

36.9 °C

28 September 2023

Coldest day

17.6 °C

19 July 1975

Wettest day

203 mm

27 April 1980

Windiest day

18.7 km/h

20 August 1965

Strongest gust

52.9 km/h

8 March 1982

Hottest feels-like

44.5 °C

22 November 2001

Coldest feels-like

16.8 °C

19 July 1975

Sunniest day

12.1 h

8 January 1960

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.8 °C2 March 2025	22.2 °C27 August 2025	26.5 °C	2,791 mm	232
2024	36.3 °C2 November 2024	22.6 °C29 May 2024	27.4 °C	2,136 mm	284
2023	36.9 °C28 September 2023	20.3 °C15 June 2023	27.0 °C	2,633 mm	248
2022	35.4 °C5 October 2022	19.9 °C2 November 2022	26.5 °C	2,934 mm	243
2021	34.2 °C11 October 2021	19.4 °C1 July 2021	26.4 °C	3,162 mm	200
2020	34.7 °C20 August 2020	19.8 °C22 August 2020	26.7 °C	2,700 mm	246
2019	34.1 °C14 March 2019	21.8 °C4 August 2019	26.6 °C	3,213 mm	231
2018	34.0 °C31 January 2018	21.1 °C20 June 2018	26.4 °C	2,952 mm	213
2017	34.1 °C3 October 2017	21.0 °C19 July 2017	26.7 °C	2,803 mm	240
2016	34.7 °C18 October 2016	20.8 °C29 April 2016	26.9 °C	2,844 mm	261
2015	35.7 °C24 September 2015	22.4 °C22 June 2015	26.9 °C	2,879 mm	292
2014	35.0 °C31 October 2014	21.8 °C30 June 2014	26.5 °C	3,001 mm	259
2013	34.7 °C26 October 2013	20.0 °C25 July 2013	26.5 °C	3,150 mm	254
2012	34.5 °C2 November 2012	22.1 °C26 June 2012	26.3 °C	3,039 mm	238
2011	35.2 °C31 August 2011	22.2 °C8 July 2011	26.6 °C	2,804 mm	257
2010	35.1 °C30 September 2010	18.9 °C18 July 2010	26.9 °C	2,482 mm	276
2009	35.0 °C10 September 2009	21.7 °C27 July 2009	26.6 °C	2,966 mm	257
2008	33.9 °C5 October 2008	21.8 °C26 June 2008	26.3 °C	2,965 mm	256
2007	34.8 °C18 February 2007	21.5 °C26 May 2007	26.6 °C	2,746 mm	276
2006	35.1 °C30 October 2006	21.9 °C26 May 2006	26.5 °C	2,716 mm	256
2005	35.2 °C26 September 2005	21.6 °C14 September 2005	26.7 °C	2,952 mm	268
2004	35.0 °C15 October 2004	21.6 °C14 June 2004	26.5 °C	2,552 mm	248
2003	35.1 °C23 January 2003	21.0 °C12 September 2003	26.5 °C	2,947 mm	254
2002	34.2 °C4 October 2002	21.9 °C18 June 2002	26.3 °C	2,870 mm	246
2001	34.6 °C13 March 2001	18.5 °C21 June 2001	26.0 °C	2,909 mm	226
2000	34.0 °C11 February 2000	19.0 °C14 July 2000	25.9 °C	3,151 mm	213
1999	34.1 °C17 November 1999	19.6 °C16 August 1999	25.8 °C	3,177 mm	158
1998	34.1 °C30 September 1998	22.0 °C1 July 1998	26.6 °C	2,850 mm	230
1997	33.4 °C21 October 1997	21.4 °C10 August 1997	26.2 °C	2,585 mm	195
1996	33.4 °C15 April 1996	19.1 °C1 July 1996	25.8 °C	2,890 mm	142
1995	34.2 °C5 October 1995	21.7 °C22 June 1995	26.3 °C	2,613 mm	200
1994	32.6 °C19 October 1994	20.5 °C11 July 1994	25.9 °C	3,091 mm	155
1993	33.0 °C24 September 1993	20.8 °C15 July 1993	25.7 °C	3,074 mm	116
1992	32.9 °C28 March 1992	21.1 °C21 July 1992	26.0 °C	2,744 mm	157
1991	33.6 °C16 January 1991	21.3 °C4 August 1991	26.0 °C	2,919 mm	129
1990	33.1 °C5 November 1990	21.0 °C24 July 1990	25.9 °C	2,974 mm	126
1989	33.3 °C24 August 1989	20.2 °C10 July 1989	25.7 °C	3,273 mm	132
1988	33.2 °C21 March 1988	21.1 °C3 June 1988	26.0 °C	3,296 mm	143
1987	33.1 °C9 September 1987	21.1 °C8 August 1987	26.2 °C	2,884 mm	191
1986	32.1 °C14 May 1986	20.6 °C18 July 1986	25.6 °C	3,136 mm	129
1985	32.6 °C18 February 1985	20.6 °C11 June 1985	25.6 °C	2,981 mm	144
1984	32.6 °C28 March 1984	19.6 °C27 August 1984	25.6 °C	2,873 mm	148
1983	34.3 °C28 January 1983	21.3 °C3 August 1983	26.3 °C	2,659 mm	222
1982	33.3 °C15 September 1982	21.8 °C17 August 1982	25.9 °C	2,480 mm	166
1981	33.4 °C7 November 1981	19.2 °C22 July 1981	25.9 °C	2,922 mm	154
1980	33.9 °C11 February 1980	20.0 °C5 July 1980	26.0 °C	2,822 mm	173
1979	33.9 °C16 September 1979	21.7 °C17 June 1979	26.0 °C	2,551 mm	175
1978	33.3 °C14 October 1978	19.4 °C17 August 1978	25.7 °C	3,078 mm	156
1977	33.6 °C21 January 1977	21.0 °C18 May 1977	25.8 °C	2,886 mm	179
1976	33.5 °C19 October 1976	20.8 °C12 July 1976	25.4 °C	3,040 mm	133
1975	32.6 °C26 November 1975	17.6 °C19 July 1975	25.3 °C	3,086 mm	108
1974	32.6 °C7 March 1974	21.2 °C23 July 1974	25.4 °C	3,006 mm	104
1973	33.6 °C14 October 1973	21.9 °C20 July 1973	25.9 °C	3,193 mm	155
1972	32.9 °C3 October 1972	21.5 °C6 November 1972	25.7 °C	3,199 mm	121
1971	33.1 °C23 January 1971	21.5 °C28 June 1971	25.3 °C	2,989 mm	85
1970	33.1 °C9 December 1970	21.7 °C26 June 1970	25.8 °C	2,777 mm	127
1969	32.9 °C22 October 1969	20.2 °C11 July 1969	26.3 °C	2,316 mm	166
1968	32.5 °C22 February 1968	20.5 °C17 May 1968	25.4 °C	2,875 mm	93
1967	32.6 °C13 March 1967	21.6 °C17 June 1967	25.6 °C	2,479 mm	101
1966	33.9 °C6 February 1966	20.8 °C6 June 1966	25.8 °C	2,582 mm	75
1965	33.2 °C28 February 1965	20.0 °C21 August 1965	25.6 °C	2,473 mm	82
1964	33.8 °C10 February 1964	21.7 °C24 June 1964	25.7 °C	2,495 mm	82
1963	33.5 °C14 October 1963	21.8 °C2 July 1963	26.1 °C	1,941 mm	129
1962	32.8 °C5 October 1962	21.6 °C28 June 1962	25.6 °C	2,499 mm	75
1961	32.5 °C15 March 1961	21.6 °C21 June 1961	25.8 °C	2,269 mm	101
1960	32.5 °C2 February 1960	21.8 °C20 June 1960	25.8 °C	2,375 mm	92
1959	32.8 °C14 October 1959	21.8 °C13 June 1959	25.6 °C	2,487 mm	67
1958	32.8 °C18 January 1958	21.7 °C28 July 1958	26.0 °C	2,725 mm	110
1957	33.3 °C29 September 1957	21.6 °C22 July 1957	25.9 °C	2,291 mm	98
1956	31.6 °C12 March 1956	21.0 °C8 July 1956	24.9 °C	2,848 mm	12
1955	32.0 °C12 October 1955	18.7 °C1 August 1955	25.3 °C	2,539 mm	36
1954	32.4 °C18 February 1954	21.5 °C29 July 1954	25.3 °C	2,603 mm	38
1953	31.6 °C24 September 1953	21.4 °C13 July 1953	25.6 °C	2,849 mm	51
1952	31.8 °C9 March 1952	21.8 °C7 August 1952	25.6 °C	2,598 mm	58
1951	32.0 °C15 October 1951	21.5 °C14 July 1951	25.5 °C	2,816 mm	46
1950	31.7 °C6 October 1950	21.6 °C12 July 1950	25.4 °C	2,558 mm	42
1949	31.0 °C10 March 1949	21.6 °C3 July 1949	25.2 °C	2,724 mm	17
1948	32.1 °C12 March 1948	21.6 °C29 July 1948	25.5 °C	2,328 mm	45
1947	32.3 °C22 February 1947	21.5 °C3 August 1947	25.3 °C	2,912 mm	38
1946	31.1 °C17 February 1946	21.4 °C31 July 1946	25.0 °C	2,705 mm	21
1945	31.4 °C29 September 1945	21.5 °C27 June 1945	25.3 °C	2,755 mm	41
1944	31.2 °C25 October 1944	21.8 °C29 June 1944	25.5 °C	2,686 mm	43
1943	30.6 °C13 October 1943	20.7 °C3 August 1943	24.7 °C	3,218 mm	12
1942	31.1 °C26 February 1942	20.9 °C20 June 1942	24.9 °C	2,665 mm	13
1941	32.6 °C10 February 1941	21.5 °C16 July 1941	25.6 °C	2,313 mm	64
1940	33.6 °C2 March 1940	21.7 °C30 July 1940	25.8 °C	2,101 mm	72

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

30.4 °C

+0.8 °C

Hot days (≥ 30 °C)

232 d/yr

+81

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2791 mm

+8 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.6 °C	+1.0 °C	257 mm	-3 mm
Feb	30.3 °C	+0.5 °C	283 mm	+32 mm
Mar	31.0 °C	+1.2 °C	204 mm	-99 mm
Apr	30.2 °C	+0.9 °C	348 mm	+4 mm
May	29.9 °C	+1.0 °C	335 mm	+1 mm
Jun	29.6 °C	+0.9 °C	279 mm	+54 mm
Jul	29.6 °C	+0.7 °C	127 mm	-28 mm
Aug	30.4 °C	+0.7 °C	144 mm	+10 mm
Sep	31.4 °C	+1.1 °C	105 mm	-39 mm
Oct	30.9 °C	+0.4 °C	180 mm	+7 mm
Nov	30.5 °C	+0.4 °C	257 mm	+46 mm
Dec	30.4 °C	+0.7 °C	270 mm	+23 mm

The year's extremes

Hottest day

33.8 °C

2 Mar 2025

Coldest day

22.2 °C

27 Aug 2025

Wettest day

73.0 mm

30 Dec 2025

Windiest day

14.8 km/h

25 Aug 2025

Strongest gust

44.3 km/h

6 Jun 2025

Hottest feels-like

41.0 °C

20 Sep 2025

Coldest feels-like

24.6 °C

2 Jul 2025

Sunniest day

11.9 h

14 Nov 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 Fonte Boa?

Fonte Boa has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 2,783 mm of precipitation per year.

What is the hottest day ever recorded in Fonte Boa?

The hottest day measured in Fonte Boa between 1940 and 2025 was 28 September 2023, reaching 36.9 °C.

What is the coldest day in Fonte Boa?

The coldest day measured in Fonte Boa between 1940 and 2025 was 19 July 1975, at 17.6 °C.

Does it snow in Fonte Boa?

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

Has the climate of Fonte Boa warmed?

Yes: Fonte Boa warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Fonte Boa?

The wettest day measured in Fonte Boa between 1940 and 2025 was 27 April 1980, with 203 mm of rain in 24 hours.

What was the windiest day in Fonte Boa?

The windiest day measured in Fonte Boa between 1940 and 2025 was 20 August 1965, with winds reaching 18.7 km/h.

What is the warmest month in Fonte Boa?

The warmest month in Fonte Boa is October (26.6 °C on average); the coldest is June (25.3 °C).

How much does it rain in Fonte Boa?

Fonte Boa receives on average 2,783 mm of precipitation per year, spread over about 318 rainy days.

Is it sunny in Fonte Boa?

Fonte Boa gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.

Are there tropical nights in Fonte Boa?

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

What was the most extreme apparent temperature in Fonte Boa?

In Fonte Boa, between 1940 and 2025, the highest apparent temperature reached 44.5 °C on 22 November 2001, and the lowest was 16.8 °C on 19 July 1975.

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