Jaicós climate — normals and trends
Jaicós (Brazil) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 28.0 °C and it receives 619 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 (30.6 °C on average) and the coldest is March (26.2 °C). Rainfall peaks in March.
Jaicós averages 0 frost days, 320 hot days (≥ 30 °C) and 84 rainy days per year.
Jaicós has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.5 °C (on 25 November 2016) and the coldest 17.1 °C (on 25 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
JaicósPiauí
- coords
- -7.36°, -41.14°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
28.0°C
Average daily high
33.2°C
Average daily low
23.1°C
Annual rainfall
619mm
Sunshine / day
11.0h
Mean relative humidity
56%
Average peak wind
18.1km/h
Seasonal range
4.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
320 d/yr
Rainy days (≥ 1 mm)
84 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.0 °C
Average feels-like low
24.3 °C
Average peak gust
36.2 km/h
Tropical nights (≥ 20 °C)
356 d/yr
Solar radiation
20.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.16 · 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
40.5 °C
25 November 2016
Coldest day
17.1 °C
25 July 1975
Wettest day
225 mm
22 January 1975
Windiest day
37.2 km/h
4 July 2017
Strongest gust
65.9 km/h
4 July 2017
Hottest feels-like
44.1 °C
31 October 2012
Coldest feels-like
15.9 °C
2 August 1988
Sunniest day
12.4 h
4 December 2025
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 | 32.1 °C | -0.4 °C | 126 mm | +5 mm |
| Feb | 34.4 °C | +3.0 °C | 13 mm | -114 mm |
| Mar | 33.9 °C | +3.1 °C | 24 mm | -136 mm |
| Apr | 35.3 °C | +3.9 °C | 14 mm | -82 mm |
| May | 34.3 °C | +2.0 °C | 4 mm | -21 mm |
| Jun | 33.9 °C | +1.6 °C | 1 mm | -3 mm |
| Jul | 34.2 °C | +1.8 °C | 0 mm | -2 mm |
| Aug | 34.9 °C | +1.2 °C | 0 mm | -0 mm |
| Sep | 35.8 °C | +0.6 °C | 0 mm | -2 mm |
| Oct | 36.7 °C | +0.5 °C | 2 mm | -4 mm |
| Nov | 36.9 °C | +1.4 °C | 10 mm | -12 mm |
| Dec | 34.6 °C | +0.2 °C | 18 mm | -36 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 Jaicós?
Jaicós has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 28.0 °C and it receives 619 mm of precipitation per year.
What is the hottest day ever recorded in Jaicós?
The hottest day measured in Jaicós between 1940 and 2025 was 25 November 2016, reaching 40.5 °C.
What is the coldest day in Jaicós?
The coldest day measured in Jaicós between 1940 and 2025 was 25 July 1975, at 17.1 °C.
Does it snow in Jaicós?
Almost never: Jaicós sees virtually no snow, with about 0 frost days per year.
Has the climate of Jaicós warmed?
Yes: Jaicós warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jaicós?
The wettest day measured in Jaicós between 1940 and 2025 was 22 January 1975, with 225 mm of rain in 24 hours.
What was the windiest day in Jaicós?
The windiest day measured in Jaicós between 1940 and 2025 was 4 July 2017, with winds reaching 37.2 km/h.
What is the warmest month in Jaicós?
The warmest month in Jaicós is October (30.6 °C on average); the coldest is March (26.2 °C).
How much does it rain in Jaicós?
Jaicós receives on average 619 mm of precipitation per year, spread over about 84 rainy days.
Is it sunny in Jaicós?
Jaicós gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
Are there tropical nights in Jaicós?
Yes: Jaicós has on average 356 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jaicós?
In Jaicós, between 1940 and 2025, the highest apparent temperature reached 44.1 °C on 31 October 2012, and the lowest was 15.9 °C on 2 August 1988.
Compare Jaicós with another city
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Nearby cities
The climate around Jaicós