Alta Floresta d'Oeste climate — normals and trends

Q: What is the climate of Alta Floresta d'Oeste?

Alta Floresta d'Oeste has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.4 °C and it receives 1,865 mm of precipitation per year.

Q: What is the hottest day ever recorded in Alta Floresta d'Oeste?

The hottest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 18 October 1963, reaching 39.6 °C.

Q: What is the coldest day in Alta Floresta d'Oeste?

The coldest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 18 July 2017, at 8.4 °C.

Q: Does it snow in Alta Floresta d'Oeste?

Almost never: Alta Floresta d'Oeste sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Alta Floresta d'Oeste warmed?

Yes: Alta Floresta d'Oeste warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Alta Floresta d'Oeste?

The wettest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 19 November 2021, with 149 mm of rain in 24 hours.

Q: What was the windiest day in Alta Floresta d'Oeste?

The windiest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 17 July 1975, with winds reaching 27.8 km/h.

Q: What is the warmest month in Alta Floresta d'Oeste?

The warmest month in Alta Floresta d'Oeste is September (25.8 °C on average); the coldest is May (23.5 °C).

Q: How much does it rain in Alta Floresta d'Oeste?

Alta Floresta d'Oeste receives on average 1,865 mm of precipitation per year, spread over about 222 rainy days.

Q: Is it sunny in Alta Floresta d'Oeste?

Alta Floresta d'Oeste gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.

Alta Floresta d'Oeste (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.4 °C and it receives 1,865 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 September (25.8 °C on average) and the coldest is May (23.5 °C). Rainfall peaks in January.

Alta Floresta d'Oeste averages 0 frost days, 156 hot days (≥ 30 °C) and 222 rainy days per year.

Alta Floresta d'Oeste has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.6 °C (on 18 October 1963) and the coldest 8.4 °C (on 18 July 2017).

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

Alta Floresta d'OesteRondônia

coords: -11.97°, -61.95°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthSeptemberColdest monthMayWettest monthJanuaryDriest monthJuly

Mean daily temperature

24.4°C

Average daily high

29.6°C

Average daily low

20.9°C

Annual rainfall

1,865mm

Sunshine / day

9.8h

Mean relative humidity

81%

Average peak wind

9.7km/h

Seasonal range

2.3°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

156 d/yr

Rainy days (≥ 1 mm)

222 d/yr

Annual snowfall

0.0 cm

Average feels-like high

34.0 °C

Average feels-like low

23.7 °C

Average peak gust

28.1 km/h

Tropical nights (≥ 20 °C)

294 d/yr

Solar radiation

18.1 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.9 °C

since 1940

+0.1 °C per decade · r² = 0.31 · 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

39.6 °C

18 October 1963

Coldest day

8.4 °C

18 July 2017

Wettest day

149 mm

19 November 2021

Windiest day

27.8 km/h

17 July 1975

Strongest gust

66.6 km/h

19 August 2022

Hottest feels-like

43.3 °C

24 October 2015

Coldest feels-like

3.7 °C

18 July 1975

Sunniest day

12.6 h

17 January 2022

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	36.6 °C13 September 2025	12.6 °C1 July 2025	25.0 °C	1,772 mm	202
2024	36.7 °C23 September 2024	13.3 °C10 August 2024	25.9 °C	1,458 mm	250
2023	37.2 °C7 November 2023	9.3 °C14 June 2023	25.7 °C	1,571 mm	234
2022	35.8 °C22 September 2022	12.3 °C1 November 2022	24.8 °C	1,848 mm	209
2021	35.2 °C29 August 2021	10.4 °C30 June 2021	25.0 °C	2,053 mm	195
2020	36.7 °C9 September 2020	10.9 °C22 August 2020	25.5 °C	1,587 mm	231
2019	35.8 °C20 September 2019	12.4 °C4 August 2019	25.0 °C	1,853 mm	204
2018	35.6 °C9 September 2018	12.8 °C10 July 2018	24.4 °C	2,065 mm	171
2017	35.8 °C9 August 2017	8.4 °C18 July 2017	24.9 °C	1,798 mm	201
2016	35.9 °C20 October 2016	13.6 °C5 September 2016	25.0 °C	1,921 mm	212
2015	39.1 °C24 October 2015	15.1 °C20 June 2015	25.4 °C	1,824 mm	222
2014	35.0 °C12 September 2014	12.3 °C25 July 2014	24.7 °C	2,081 mm	157
2013	34.8 °C19 August 2013	10.5 °C25 July 2013	24.4 °C	2,068 mm	158
2012	36.8 °C12 September 2012	13.4 °C19 July 2012	24.8 °C	1,839 mm	198
2011	36.4 °C10 September 2011	12.7 °C5 July 2011	25.0 °C	2,051 mm	196
2010	35.9 °C29 September 2010	9.9 °C17 July 2010	25.0 °C	1,840 mm	228
2009	35.4 °C8 September 2009	10.1 °C25 July 2009	24.7 °C	1,898 mm	167
2008	35.9 °C26 August 2008	13.1 °C31 May 2008	24.6 °C	1,868 mm	175
2007	36.8 °C30 September 2007	13.1 °C27 July 2007	24.8 °C	1,880 mm	203
2006	35.9 °C16 August 2006	15.0 °C13 May 2006	24.7 °C	1,932 mm	202
2005	36.3 °C24 September 2005	12.4 °C19 July 2005	24.8 °C	1,774 mm	210
2004	35.0 °C18 August 2004	13.3 °C13 June 2004	24.7 °C	2,187 mm	186
2003	34.4 °C5 September 2003	13.3 °C11 September 2003	24.6 °C	1,781 mm	191
2002	35.2 °C8 October 2002	14.9 °C24 June 2002	25.0 °C	1,656 mm	199
2001	34.7 °C5 October 2001	10.3 °C19 June 2001	24.3 °C	1,972 mm	157
2000	34.7 °C10 September 2000	9.5 °C12 July 2000	24.2 °C	1,696 mm	164
1999	34.9 °C29 August 1999	9.9 °C16 August 1999	24.3 °C	1,752 mm	173
1998	34.6 °C5 October 1998	14.1 °C26 June 1998	24.8 °C	1,848 mm	189
1997	34.9 °C27 August 1997	15.2 °C8 August 1997	24.6 °C	1,877 mm	168
1996	35.4 °C16 September 1996	10.8 °C30 June 1996	24.2 °C	1,881 mm	149
1995	35.4 °C5 October 1995	14.6 °C5 August 1995	24.5 °C	1,799 mm	170
1994	34.6 °C13 September 1994	10.2 °C11 July 1994	24.3 °C	2,019 mm	160
1993	33.8 °C13 October 1993	10.3 °C31 July 1993	24.1 °C	1,989 mm	156
1992	33.6 °C15 October 1992	11.9 °C24 July 1992	24.1 °C	1,955 mm	153
1991	34.1 °C13 October 1991	12.7 °C4 August 1991	24.3 °C	1,960 mm	144
1990	33.8 °C8 August 1990	10.6 °C22 July 1990	24.0 °C	1,897 mm	145
1989	35.1 °C19 September 1989	8.9 °C7 July 1989	24.0 °C	2,109 mm	146
1988	36.1 °C25 September 1988	12.2 °C13 July 1988	24.3 °C	1,812 mm	155
1987	34.8 °C7 October 1987	13.4 °C7 August 1987	24.5 °C	1,886 mm	171
1986	34.4 °C4 November 1986	11.9 °C2 June 1986	24.1 °C	1,778 mm	138
1985	34.4 °C20 August 1985	9.5 °C10 June 1985	23.9 °C	2,214 mm	117
1984	34.1 °C9 August 1984	10.0 °C26 August 1984	24.1 °C	1,944 mm	148
1983	35.9 °C25 September 1983	12.4 °C17 July 1983	24.4 °C	1,917 mm	157
1982	33.3 °C4 September 1982	15.6 °C28 May 1982	24.3 °C	1,759 mm	142
1981	34.4 °C30 August 1981	8.5 °C20 July 1981	24.1 °C	1,958 mm	133
1980	33.9 °C2 September 1980	12.8 °C3 July 1980	24.3 °C	1,867 mm	178
1979	34.2 °C6 October 1979	11.0 °C1 June 1979	24.2 °C	1,743 mm	161
1978	34.4 °C28 August 1978	10.2 °C16 August 1978	24.1 °C	2,007 mm	138
1977	35.7 °C10 September 1977	10.8 °C18 May 1977	24.0 °C	2,050 mm	128
1976	33.9 °C19 August 1976	12.0 °C11 July 1976	23.6 °C	1,849 mm	112
1975	33.6 °C1 September 1975	8.5 °C19 July 1975	23.9 °C	1,769 mm	130
1974	34.0 °C14 September 1974	14.9 °C24 July 1974	23.7 °C	2,168 mm	97
1973	34.0 °C19 August 1973	14.2 °C24 July 1973	24.3 °C	1,825 mm	136
1972	33.9 °C27 September 1972	12.7 °C1 September 1972	24.2 °C	1,831 mm	133
1971	33.5 °C23 August 1971	12.4 °C12 June 1971	23.6 °C	1,908 mm	101
1970	34.7 °C23 August 1970	13.6 °C25 June 1970	24.3 °C	1,914 mm	162
1969	35.9 °C31 August 1969	10.2 °C9 July 1969	24.8 °C	1,400 mm	210
1968	34.1 °C27 September 1968	11.3 °C17 May 1968	24.0 °C	1,639 mm	148
1967	36.5 °C28 September 1967	14.3 °C15 June 1967	24.4 °C	1,699 mm	140
1966	36.5 °C23 August 1966	13.8 °C1 July 1966	24.3 °C	1,609 mm	129
1965	35.5 °C31 August 1965	10.5 °C20 August 1965	24.1 °C	2,308 mm	128
1964	35.9 °C13 September 1964	15.0 °C7 June 1964	24.3 °C	1,765 mm	116
1963	39.6 °C18 October 1963	15.0 °C7 August 1963	25.3 °C	1,520 mm	163
1962	37.0 °C28 August 1962	12.1 °C13 June 1962	24.2 °C	1,767 mm	122
1961	39.5 °C28 September 1961	12.8 °C16 June 1961	25.5 °C	1,377 mm	187
1960	36.1 °C10 August 1960	12.6 °C21 May 1960	24.4 °C	1,949 mm	144
1959	37.9 °C10 September 1959	14.7 °C8 June 1959	24.6 °C	1,715 mm	151
1958	37.4 °C25 August 1958	15.8 °C29 May 1958	24.9 °C	1,934 mm	157
1957	36.8 °C19 September 1957	11.7 °C21 July 1957	24.6 °C	1,890 mm	161
1956	33.1 °C8 September 1956	14.4 °C6 June 1956	23.5 °C	2,011 mm	55
1955	37.2 °C26 September 1955	9.9 °C31 July 1955	24.3 °C	1,951 mm	116
1954	36.2 °C14 September 1954	15.8 °C5 July 1954	24.4 °C	1,856 mm	123
1953	35.7 °C7 August 1953	14.9 °C6 July 1953	24.1 °C	2,086 mm	109
1952	34.6 °C9 August 1952	13.9 °C21 June 1952	24.1 °C	2,232 mm	116
1951	35.1 °C13 August 1951	15.0 °C2 June 1951	24.3 °C	1,942 mm	126
1950	36.5 °C24 August 1950	14.0 °C4 August 1950	24.0 °C	2,281 mm	96
1949	35.1 °C1 September 1949	14.7 °C2 July 1949	24.4 °C	1,525 mm	149
1948	35.6 °C22 August 1948	15.9 °C2 June 1948	24.6 °C	1,182 mm	166
1947	35.0 °C20 August 1947	12.1 °C14 July 1947	23.8 °C	2,234 mm	99
1946	35.3 °C20 August 1946	12.2 °C17 July 1946	24.2 °C	1,796 mm	130
1945	36.6 °C30 August 1945	14.8 °C12 July 1945	24.0 °C	2,136 mm	109
1944	34.3 °C5 August 1944	14.3 °C28 June 1944	24.1 °C	2,154 mm	111
1943	32.7 °C20 August 1943	14.9 °C24 August 1943	23.2 °C	2,071 mm	52
1942	37.1 °C17 September 1942	9.9 °C20 June 1942	24.0 °C	1,454 mm	142
1941	34.5 °C10 October 1941	13.4 °C7 July 1941	24.3 °C	1,669 mm	111
1940	35.7 °C20 August 1940	17.3 °C23 September 1940	24.3 °C	1,672 mm	111

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

+0.5 °C

Hot days (≥ 30 °C)

202 d/yr

+46

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1772 mm

-93 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.5 °C	0.0 °C	254 mm	-38 mm
Feb	29.1 °C	+0.7 °C	205 mm	-76 mm
Mar	29.0 °C	+0.5 °C	242 mm	-22 mm
Apr	29.1 °C	+0.6 °C	227 mm	+71 mm
May	29.4 °C	+1.2 °C	67 mm	-6 mm
Jun	29.4 °C	+0.3 °C	21 mm	+1 mm
Jul	30.5 °C	+0.1 °C	0 mm	-14 mm
Aug	32.4 °C	+0.4 °C	8 mm	-21 mm
Sep	33.3 °C	+1.4 °C	53 mm	-28 mm
Oct	31.5 °C	+0.7 °C	126 mm	-40 mm
Nov	30.8 °C	+1.2 °C	209 mm	-14 mm
Dec	28.3 °C	-0.5 °C	360 mm	+95 mm

The year's extremes

Hottest day

36.6 °C

13 Sep 2025

Coldest day

12.6 °C

1 Jul 2025

Wettest day

45.0 mm

16 Apr 2025

Windiest day

20.5 km/h

28 May 2025

Strongest gust

44.6 km/h

21 Sep 2025

Hottest feels-like

40.7 °C

13 Sep 2025

Coldest feels-like

10.4 °C

1 Jul 2025

Sunniest day

12.6 h

24 Jan 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 Alta Floresta d'Oeste?

Alta Floresta d'Oeste has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.4 °C and it receives 1,865 mm of precipitation per year.

What is the hottest day ever recorded in Alta Floresta d'Oeste?

The hottest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 18 October 1963, reaching 39.6 °C.

What is the coldest day in Alta Floresta d'Oeste?

The coldest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 18 July 2017, at 8.4 °C.

Does it snow in Alta Floresta d'Oeste?

Almost never: Alta Floresta d'Oeste sees virtually no snow, with about 0 frost days per year.

Has the climate of Alta Floresta d'Oeste warmed?

Yes: Alta Floresta d'Oeste warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Alta Floresta d'Oeste?

The wettest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 19 November 2021, with 149 mm of rain in 24 hours.

What was the windiest day in Alta Floresta d'Oeste?

The windiest day measured in Alta Floresta d'Oeste between 1940 and 2025 was 17 July 1975, with winds reaching 27.8 km/h.

What is the warmest month in Alta Floresta d'Oeste?

The warmest month in Alta Floresta d'Oeste is September (25.8 °C on average); the coldest is May (23.5 °C).

How much does it rain in Alta Floresta d'Oeste?

Alta Floresta d'Oeste receives on average 1,865 mm of precipitation per year, spread over about 222 rainy days.

Is it sunny in Alta Floresta d'Oeste?

Alta Floresta d'Oeste gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.

Are there tropical nights in Alta Floresta d'Oeste?

Yes: Alta Floresta d'Oeste has on average 294 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Alta Floresta d'Oeste?

In Alta Floresta d'Oeste, between 1940 and 2025, the highest apparent temperature reached 43.3 °C on 24 October 2015, and the lowest was 3.7 °C on 18 July 1975.

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