Riacho de Santana climate — normals and trends
Riacho de Santana (Brazil) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 25.3 °C and it receives 664 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 (27.2 °C on average) and the coldest is July (23.2 °C). Rainfall peaks in November.
Riacho de Santana averages 0 frost days, 234 hot days (≥ 30 °C) and 81 rainy days per year.
Riacho de Santana has warmed by +1.0 °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 5 October 2015) and the coldest 12.9 °C (on 7 June 2022).
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
Riacho de SantanaEstado de Bahia
- coords
- -13.61°, -42.94°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.3°C
Average daily high
30.9°C
Average daily low
20.3°C
Annual rainfall
664mm
Sunshine / day
10.9h
Mean relative humidity
58%
Average peak wind
13.0km/h
Seasonal range
4.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
234 d/yr
Rainy days (≥ 1 mm)
81 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.1 °C
Average feels-like low
21.0 °C
Average peak gust
30.5 km/h
Tropical nights (≥ 20 °C)
216 d/yr
Solar radiation
20.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.17 · 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
5 October 2015
Coldest day
12.9 °C
7 June 2022
Wettest day
179 mm
5 November 2000
Windiest day
28.3 km/h
14 July 1985
Strongest gust
62.3 km/h
12 July 1985
Hottest feels-like
43.5 °C
29 October 2017
Coldest feels-like
11.1 °C
25 May 1975
Sunniest day
12.7 h
26 November 2023
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 | 31.5 °C | +0.7 °C | 89 mm | -18 mm |
| Feb | 33.7 °C | +2.8 °C | 7 mm | -83 mm |
| Mar | 34.9 °C | +4.3 °C | 24 mm | -80 mm |
| Apr | 33.3 °C | +2.9 °C | 43 mm | -6 mm |
| May | 31.9 °C | +1.6 °C | 5 mm | -5 mm |
| Jun | 31.8 °C | +2.2 °C | 0 mm | -1 mm |
| Jul | 31.3 °C | +1.9 °C | 0 mm | -1 mm |
| Aug | 32.9 °C | +1.9 °C | 0 mm | -1 mm |
| Sep | 34.4 °C | +1.4 °C | 1 mm | -5 mm |
| Oct | 34.6 °C | +1.4 °C | 16 mm | -31 mm |
| Nov | 32.4 °C | +1.2 °C | 140 mm | +13 mm |
| Dec | 31.9 °C | +1.2 °C | 94 mm | -28 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 Riacho de Santana?
Riacho de Santana has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 25.3 °C and it receives 664 mm of precipitation per year.
What is the hottest day ever recorded in Riacho de Santana?
The hottest day measured in Riacho de Santana between 1940 and 2025 was 5 October 2015, reaching 40.3 °C.
What is the coldest day in Riacho de Santana?
The coldest day measured in Riacho de Santana between 1940 and 2025 was 7 June 2022, at 12.9 °C.
Does it snow in Riacho de Santana?
Almost never: Riacho de Santana sees virtually no snow, with about 0 frost days per year.
Has the climate of Riacho de Santana warmed?
Yes: Riacho de Santana warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Riacho de Santana?
The wettest day measured in Riacho de Santana between 1940 and 2025 was 5 November 2000, with 179 mm of rain in 24 hours.
What was the windiest day in Riacho de Santana?
The windiest day measured in Riacho de Santana between 1940 and 2025 was 14 July 1985, with winds reaching 28.3 km/h.
What is the warmest month in Riacho de Santana?
The warmest month in Riacho de Santana is October (27.2 °C on average); the coldest is July (23.2 °C).
How much does it rain in Riacho de Santana?
Riacho de Santana receives on average 664 mm of precipitation per year, spread over about 81 rainy days.
Is it sunny in Riacho de Santana?
Riacho de Santana gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
Are there tropical nights in Riacho de Santana?
Yes: Riacho de Santana has on average 216 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Riacho de Santana?
In Riacho de Santana, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 29 October 2017, and the lowest was 11.1 °C on 25 May 1975.
Compare Riacho de Santana with another city
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Nearby cities
The climate around Riacho de Santana