Ouro Preto do Oeste climate — normals and trends
Ouro Preto do Oeste (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.4 °C and it receives 1,747 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 (26.9 °C on average) and the coldest is May (24.5 °C). Rainfall peaks in January.
Ouro Preto do Oeste averages 0 frost days, 205 hot days (≥ 30 °C) and 222 rainy days per year.
Ouro Preto do Oeste has warmed by +1.1 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.3 °C (on 16 September 1961) and the coldest 10.3 °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
Ouro Preto do OesteRondônia
- coords
- -10.75°, -62.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.4°C
Average daily high
30.5°C
Average daily low
21.8°C
Annual rainfall
1,747mm
Sunshine / day
9.7h
Mean relative humidity
81%
Average peak wind
9.3km/h
Seasonal range
2.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
205 d/yr
Rainy days (≥ 1 mm)
222 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.7 °C
Average feels-like low
25.1 °C
Average peak gust
26.2 km/h
Tropical nights (≥ 20 °C)
325 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.39 · p = < 0.001
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
40.3 °C
16 September 1961
Coldest day
10.3 °C
19 July 1975
Wettest day
174 mm
20 January 1965
Windiest day
26.4 km/h
14 August 1978
Strongest gust
59.4 km/h
19 August 2022
Hottest feels-like
44.5 °C
20 October 2016
Coldest feels-like
5.3 °C
18 July 1975
Sunniest day
12.6 h
14 January 1946
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?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 29.4 °C | +0.2 °C | 256 mm | -9 mm |
| Feb | 29.3 °C | +0.2 °C | 196 mm | -62 mm |
| Mar | 30.1 °C | +0.9 °C | 282 mm | +45 mm |
| Apr | 30.2 °C | +1.0 °C | 196 mm | +39 mm |
| May | 30.4 °C | +1.3 °C | 55 mm | -25 mm |
| Jun | 31.3 °C | +1.1 °C | 15 mm | -8 mm |
| Jul | 32.7 °C | +0.8 °C | 0 mm | -13 mm |
| Aug | 33.8 °C | +0.4 °C | 3 mm | -25 mm |
| Sep | 34.2 °C | +1.1 °C | 59 mm | -23 mm |
| Oct | 33.0 °C | +1.1 °C | 96 mm | -53 mm |
| Nov | 32.0 °C | +1.5 °C | 162 mm | -43 mm |
| Dec | 29.2 °C | -0.3 °C | 423 mm | +172 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Ouro Preto do Oeste?
Ouro Preto do Oeste has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.4 °C and it receives 1,747 mm of precipitation per year.
What is the hottest day ever recorded in Ouro Preto do Oeste?
The hottest day measured in Ouro Preto do Oeste between 1940 and 2025 was 16 September 1961, reaching 40.3 °C.
What is the coldest day in Ouro Preto do Oeste?
The coldest day measured in Ouro Preto do Oeste between 1940 and 2025 was 19 July 1975, at 10.3 °C.
Does it snow in Ouro Preto do Oeste?
Almost never: Ouro Preto do Oeste sees virtually no snow, with about 0 frost days per year.
Has the climate of Ouro Preto do Oeste warmed?
Yes: Ouro Preto do Oeste warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ouro Preto do Oeste?
The wettest day measured in Ouro Preto do Oeste between 1940 and 2025 was 20 January 1965, with 174 mm of rain in 24 hours.
What was the windiest day in Ouro Preto do Oeste?
The windiest day measured in Ouro Preto do Oeste between 1940 and 2025 was 14 August 1978, with winds reaching 26.4 km/h.
What is the warmest month in Ouro Preto do Oeste?
The warmest month in Ouro Preto do Oeste is September (26.9 °C on average); the coldest is May (24.5 °C).
How much does it rain in Ouro Preto do Oeste?
Ouro Preto do Oeste receives on average 1,747 mm of precipitation per year, spread over about 222 rainy days.
Is it sunny in Ouro Preto do Oeste?
Ouro Preto do Oeste gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
Are there tropical nights in Ouro Preto do Oeste?
Yes: Ouro Preto do Oeste has on average 325 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ouro Preto do Oeste?
In Ouro Preto do Oeste, between 1940 and 2025, the highest apparent temperature reached 44.5 °C on 20 October 2016, and the lowest was 5.3 °C on 18 July 1975.
Compare Ouro Preto do Oeste with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ouro Preto do Oeste