Pires do Rio climate — normals and trends
Pires do Rio (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 22.8 °C and it receives 1,360 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 (24.6 °C on average) and the coldest is June (20.3 °C). Rainfall peaks in December.
Pires do Rio averages 0 frost days, 91 hot days (≥ 30 °C) and 150 rainy days per year.
Pires do Rio has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.2 °C (on 18 October 1963) and the coldest 3.6 °C (on 1 June 1979).
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
Pires do RioGoiás
- coords
- -17.30°, -48.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
22.8°C
Average daily high
28.3°C
Average daily low
18.1°C
Annual rainfall
1,360mm
Sunshine / day
10.4h
Mean relative humidity
68%
Average peak wind
12.7km/h
Seasonal range
4.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
91 d/yr
Rainy days (≥ 1 mm)
150 d/yr
Annual snowfall
0.0 cm
Average feels-like high
30.5 °C
Average feels-like low
18.8 °C
Average peak gust
30.8 km/h
Tropical nights (≥ 20 °C)
75 d/yr
Solar radiation
19.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.56 · 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
39.2 °C
18 October 1963
Coldest day
3.6 °C
1 June 1979
Wettest day
98 mm
20 January 1960
Windiest day
34.9 km/h
28 December 1958
Strongest gust
68.8 km/h
24 December 2013
Hottest feels-like
40.7 °C
21 October 2015
Coldest feels-like
0.4 °C
1 June 1979
Sunniest day
12.8 h
25 January 2025
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 | 28.4 °C | +0.2 °C | 296 mm | +61 mm |
| Feb | 29.9 °C | +1.6 °C | 72 mm | -118 mm |
| Mar | 30.4 °C | +2.2 °C | 69 mm | -105 mm |
| Apr | 28.7 °C | +0.7 °C | 82 mm | +6 mm |
| May | 27.2 °C | +0.1 °C | 3 mm | -22 mm |
| Jun | 27.4 °C | +0.8 °C | 2 mm | -6 mm |
| Jul | 27.4 °C | +0.5 °C | 0 mm | -5 mm |
| Aug | 29.7 °C | +0.6 °C | 1 mm | -6 mm |
| Sep | 31.6 °C | +0.6 °C | 32 mm | -3 mm |
| Oct | 31.2 °C | +1.0 °C | 30 mm | -103 mm |
| Nov | 31.4 °C | +2.9 °C | 96 mm | -120 mm |
| Dec | 28.6 °C | +0.6 °C | 216 mm | -42 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 Pires do Rio?
Pires do Rio has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 22.8 °C and it receives 1,360 mm of precipitation per year.
What is the hottest day ever recorded in Pires do Rio?
The hottest day measured in Pires do Rio between 1940 and 2025 was 18 October 1963, reaching 39.2 °C.
What is the coldest day in Pires do Rio?
The coldest day measured in Pires do Rio between 1940 and 2025 was 1 June 1979, at 3.6 °C.
Does it snow in Pires do Rio?
Almost never: Pires do Rio sees virtually no snow, with about 0 frost days per year.
Has the climate of Pires do Rio warmed?
Yes: Pires do Rio warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Pires do Rio?
The wettest day measured in Pires do Rio between 1940 and 2025 was 20 January 1960, with 98 mm of rain in 24 hours.
What was the windiest day in Pires do Rio?
The windiest day measured in Pires do Rio between 1940 and 2025 was 28 December 1958, with winds reaching 34.9 km/h.
What is the warmest month in Pires do Rio?
The warmest month in Pires do Rio is September (24.6 °C on average); the coldest is June (20.3 °C).
How much does it rain in Pires do Rio?
Pires do Rio receives on average 1,360 mm of precipitation per year, spread over about 150 rainy days.
Is it sunny in Pires do Rio?
Pires do Rio gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
Are there tropical nights in Pires do Rio?
Yes: Pires do Rio has on average 75 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Pires do Rio?
In Pires do Rio, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 21 October 2015, and the lowest was 0.4 °C on 1 June 1979.
Compare Pires do Rio with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Pires do Rio