Barretos climate — normals and trends
Barretos (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.6 °C and it receives 1,361 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 (25.4 °C on average) and the coldest is June (20.4 °C). Rainfall peaks in December.
Barretos averages 0 frost days, 140 hot days (≥ 30 °C) and 149 rainy days per year.
Barretos has warmed by +1.9 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.4 °C (on 18 October 1963) and the coldest 2.3 °C (on 21 July 1981).
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
BarretosSão Paulo
- coords
- -20.56°, -48.57°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.6°C
Average daily high
29.0°C
Average daily low
19.1°C
Annual rainfall
1,361mm
Sunshine / day
10.2h
Mean relative humidity
68%
Average peak wind
12.5km/h
Seasonal range
5.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
140 d/yr
Rainy days (≥ 1 mm)
149 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.6 °C
Average feels-like low
20.2 °C
Average peak gust
29.3 km/h
Tropical nights (≥ 20 °C)
179 d/yr
Solar radiation
18.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.62 · 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
41.4 °C
18 October 1963
Coldest day
2.3 °C
21 July 1981
Wettest day
156 mm
14 March 2008
Windiest day
30.8 km/h
7 June 2011
Strongest gust
77.0 km/h
7 June 2011
Hottest feels-like
43.0 °C
29 October 2007
Coldest feels-like
-1.0 °C
21 July 1981
Sunniest day
13.2 h
16 December 1952
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 31.0 °C | +1.7 °C | 115 mm | -119 mm |
| Feb | 31.7 °C | +2.1 °C | 100 mm | -94 mm |
| Mar | 32.4 °C | +2.9 °C | 68 mm | -91 mm |
| Apr | 29.5 °C | +0.7 °C | 127 mm | +53 mm |
| May | 28.2 °C | +1.3 °C | 12 mm | -30 mm |
| Jun | 27.4 °C | +1.0 °C | 18 mm | -5 mm |
| Jul | 27.5 °C | +0.5 °C | 4 mm | -15 mm |
| Aug | 30.1 °C | +0.6 °C | 4 mm | -14 mm |
| Sep | 33.0 °C | +1.7 °C | 18 mm | -32 mm |
| Oct | 31.4 °C | +0.4 °C | 74 mm | -57 mm |
| Nov | 32.1 °C | +2.1 °C | 69 mm | -107 mm |
| Dec | 31.3 °C | +2.1 °C | 152 mm | -91 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 Barretos?
Barretos has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.6 °C and it receives 1,361 mm of precipitation per year.
What is the hottest day ever recorded in Barretos?
The hottest day measured in Barretos between 1940 and 2025 was 18 October 1963, reaching 41.4 °C.
What is the coldest day in Barretos?
The coldest day measured in Barretos between 1940 and 2025 was 21 July 1981, at 2.3 °C.
Does it snow in Barretos?
Almost never: Barretos sees virtually no snow, with about 0 frost days per year.
Has the climate of Barretos warmed?
Yes: Barretos warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Barretos?
The wettest day measured in Barretos between 1940 and 2025 was 14 March 2008, with 156 mm of rain in 24 hours.
What was the windiest day in Barretos?
The windiest day measured in Barretos between 1940 and 2025 was 7 June 2011, with winds reaching 30.8 km/h.
What is the warmest month in Barretos?
The warmest month in Barretos is October (25.4 °C on average); the coldest is June (20.4 °C).
How much does it rain in Barretos?
Barretos receives on average 1,361 mm of precipitation per year, spread over about 149 rainy days.
Is it sunny in Barretos?
Barretos gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
Are there tropical nights in Barretos?
Yes: Barretos has on average 179 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Barretos?
In Barretos, between 1940 and 2025, the highest apparent temperature reached 43.0 °C on 29 October 2007, and the lowest was -1.0 °C on 21 July 1981.
Compare Barretos with another city
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Nearby cities
The climate around Barretos