Pio IX climate — normals and trends
Pio IX (Brazil) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 638 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 (27.9 °C on average) and the coldest is March (24.4 °C). Rainfall peaks in March.
Pio IX averages 0 frost days, 232 hot days (≥ 30 °C) and 95 rainy days per year.
Pio IX has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.8 °C (on 31 October 2023) and the coldest 15.4 °C (on 2 August 1988).
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
Pio IXPiauí
- coords
- -6.84°, -40.61°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.8°C
Average daily high
30.9°C
Average daily low
21.0°C
Annual rainfall
638mm
Sunshine / day
10.8h
Mean relative humidity
62%
Average peak wind
18.1km/h
Seasonal range
3.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
232 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.4 °C
Average feels-like low
22.1 °C
Average peak gust
36.9 km/h
Tropical nights (≥ 20 °C)
292 d/yr
Solar radiation
20.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.14 · 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
37.8 °C
31 October 2023
Coldest day
15.4 °C
2 August 1988
Wettest day
111 mm
11 February 1992
Windiest day
34.9 km/h
4 July 2017
Strongest gust
62.3 km/h
4 July 2017
Hottest feels-like
40.4 °C
31 October 2012
Coldest feels-like
13.9 °C
2 August 1985
Sunniest day
12.4 h
18 December 1955
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 | 30.2 °C | -0.4 °C | 156 mm | +53 mm |
| Feb | 31.1 °C | +1.6 °C | 30 mm | -100 mm |
| Mar | 30.1 °C | +1.3 °C | 69 mm | -98 mm |
| Apr | 31.5 °C | +2.6 °C | 25 mm | -96 mm |
| May | 31.5 °C | +2.0 °C | 7 mm | -32 mm |
| Jun | 31.2 °C | +1.4 °C | 2 mm | -7 mm |
| Jul | 31.8 °C | +1.6 °C | 1 mm | -4 mm |
| Aug | 32.6 °C | +1.1 °C | 1 mm | -1 mm |
| Sep | 33.6 °C | +0.7 °C | 0 mm | -3 mm |
| Oct | 34.5 °C | +0.9 °C | 7 mm | +1 mm |
| Nov | 34.4 °C | +1.2 °C | 5 mm | -9 mm |
| Dec | 31.9 °C | -0.3 °C | 70 mm | +30 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 Pio IX?
Pio IX has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 638 mm of precipitation per year.
What is the hottest day ever recorded in Pio IX?
The hottest day measured in Pio IX between 1940 and 2025 was 31 October 2023, reaching 37.8 °C.
What is the coldest day in Pio IX?
The coldest day measured in Pio IX between 1940 and 2025 was 2 August 1988, at 15.4 °C.
Does it snow in Pio IX?
Almost never: Pio IX sees virtually no snow, with about 0 frost days per year.
Has the climate of Pio IX warmed?
Yes: Pio IX warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Pio IX?
The wettest day measured in Pio IX between 1940 and 2025 was 11 February 1992, with 111 mm of rain in 24 hours.
What was the windiest day in Pio IX?
The windiest day measured in Pio IX between 1940 and 2025 was 4 July 2017, with winds reaching 34.9 km/h.
What is the warmest month in Pio IX?
The warmest month in Pio IX is October (27.9 °C on average); the coldest is March (24.4 °C).
How much does it rain in Pio IX?
Pio IX receives on average 638 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Pio IX?
Pio IX gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
Are there tropical nights in Pio IX?
Yes: Pio IX has on average 292 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Pio IX?
In Pio IX, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 31 October 2012, and the lowest was 13.9 °C on 2 August 1985.
Compare Pio IX with another city
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Nearby cities
The climate around Pio IX