Castro Alves climate — normals and trends
Castro Alves (Brazil) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 24.1 °C and it receives 559 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 February (25.7 °C on average) and the coldest is July (21.6 °C). Rainfall peaks in March.
Castro Alves averages 0 frost days, 144 hot days (≥ 30 °C) and 158 rainy days per year.
Castro Alves has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.9 °C (on 23 October 1954) and the coldest 11.4 °C (on 2 September 2006).
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
Castro AlvesEstado de Bahia
- coords
- -12.77°, -39.43°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.1°C
Average daily high
29.1°C
Average daily low
20.4°C
Annual rainfall
559mm
Sunshine / day
10.0h
Mean relative humidity
78%
Average peak wind
14.6km/h
Seasonal range
4.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
144 d/yr
Rainy days (≥ 1 mm)
158 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.7 °C
Average feels-like low
23.0 °C
Average peak gust
35.0 km/h
Tropical nights (≥ 20 °C)
235 d/yr
Solar radiation
17.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.41 · 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
37.9 °C
23 October 1954
Coldest day
11.4 °C
2 September 2006
Wettest day
129 mm
29 January 1992
Windiest day
29.0 km/h
19 July 1985
Strongest gust
66.2 km/h
30 July 2007
Hottest feels-like
43.8 °C
26 November 2015
Coldest feels-like
10.8 °C
2 September 2006
Sunniest day
12.8 h
16 December 1940
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 | 31.8 °C | +0.7 °C | 134 mm | +72 mm |
| Feb | 30.4 °C | -0.7 °C | 52 mm | -1 mm |
| Mar | 31.1 °C | +0.2 °C | 35 mm | -31 mm |
| Apr | 31.2 °C | +1.6 °C | 33 mm | -20 mm |
| May | 27.4 °C | -0.6 °C | 57 mm | +21 mm |
| Jun | 26.9 °C | +0.3 °C | 31 mm | -2 mm |
| Jul | 25.9 °C | 0.0 °C | 22 mm | -12 mm |
| Aug | 26.8 °C | +0.4 °C | 34 mm | +2 mm |
| Sep | 27.4 °C | -0.6 °C | 33 mm | +6 mm |
| Oct | 28.5 °C | -1.4 °C | 38 mm | +3 mm |
| Nov | 30.9 °C | +0.3 °C | 33 mm | -29 mm |
| Dec | 31.8 °C | +0.9 °C | 19 mm | -46 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 Castro Alves?
Castro Alves has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 24.1 °C and it receives 559 mm of precipitation per year.
What is the hottest day ever recorded in Castro Alves?
The hottest day measured in Castro Alves between 1940 and 2025 was 23 October 1954, reaching 37.9 °C.
What is the coldest day in Castro Alves?
The coldest day measured in Castro Alves between 1940 and 2025 was 2 September 2006, at 11.4 °C.
Does it snow in Castro Alves?
Almost never: Castro Alves sees virtually no snow, with about 0 frost days per year.
Has the climate of Castro Alves warmed?
Yes: Castro Alves warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Castro Alves?
The wettest day measured in Castro Alves between 1940 and 2025 was 29 January 1992, with 129 mm of rain in 24 hours.
What was the windiest day in Castro Alves?
The windiest day measured in Castro Alves between 1940 and 2025 was 19 July 1985, with winds reaching 29.0 km/h.
What is the warmest month in Castro Alves?
The warmest month in Castro Alves is February (25.7 °C on average); the coldest is July (21.6 °C).
How much does it rain in Castro Alves?
Castro Alves receives on average 559 mm of precipitation per year, spread over about 158 rainy days.
Is it sunny in Castro Alves?
Castro Alves gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Castro Alves?
Yes: Castro Alves has on average 235 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Castro Alves?
In Castro Alves, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 26 November 2015, and the lowest was 10.8 °C on 2 September 2006.
Compare Castro Alves with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Castro Alves