Santo Antônio climate — normals and trends
Santo Antônio (Brazil) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 25.9 °C and it receives 520 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 January (26.8 °C on average) and the coldest is July (24.4 °C). Rainfall peaks in March.
Santo Antônio averages 0 frost days, 227 hot days (≥ 30 °C) and 128 rainy days per year.
Santo Antônio 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 35.5 °C (on 13 February 1952) and the coldest 17.6 °C (on 1 August 1986).
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
Santo AntônioRio Grande do Norte
- coords
- -6.31°, -35.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.9°C
Average daily high
30.4°C
Average daily low
22.6°C
Annual rainfall
520mm
Sunshine / day
11.0h
Mean relative humidity
75%
Average peak wind
20.2km/h
Seasonal range
2.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
227 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.7 °C
Average feels-like low
25.2 °C
Average peak gust
42.1 km/h
Tropical nights (≥ 20 °C)
360 d/yr
Solar radiation
19.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.39 · 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
35.5 °C
13 February 1952
Coldest day
17.6 °C
1 August 1986
Wettest day
114 mm
12 February 1986
Windiest day
32.9 km/h
17 June 1967
Strongest gust
63.0 km/h
19 August 1947
Hottest feels-like
41.0 °C
9 March 1988
Coldest feels-like
18.1 °C
1 August 1986
Sunniest day
12.4 h
3 January 1941
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 | +0.3 °C | 63 mm | +16 mm |
| Feb | 31.1 °C | -0.2 °C | 62 mm | -3 mm |
| Mar | 31.0 °C | +0.1 °C | 72 mm | -32 mm |
| Apr | 31.7 °C | +1.4 °C | 53 mm | -44 mm |
| May | 30.4 °C | +0.6 °C | 69 mm | +9 mm |
| Jun | 29.1 °C | +0.3 °C | 56 mm | +15 mm |
| Jul | 28.2 °C | -0.3 °C | 26 mm | -8 mm |
| Aug | 29.1 °C | -0.1 °C | 32 mm | +18 mm |
| Sep | 29.9 °C | -0.3 °C | 15 mm | +4 mm |
| Oct | 30.6 °C | -0.5 °C | 9 mm | -2 mm |
| Nov | 31.5 °C | 0.0 °C | 7 mm | -4 mm |
| Dec | 31.6 °C | 0.0 °C | 9 mm | -13 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 Santo Antônio?
Santo Antônio has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 25.9 °C and it receives 520 mm of precipitation per year.
What is the hottest day ever recorded in Santo Antônio?
The hottest day measured in Santo Antônio between 1940 and 2025 was 13 February 1952, reaching 35.5 °C.
What is the coldest day in Santo Antônio?
The coldest day measured in Santo Antônio between 1940 and 2025 was 1 August 1986, at 17.6 °C.
Does it snow in Santo Antônio?
Almost never: Santo Antônio sees virtually no snow, with about 0 frost days per year.
Has the climate of Santo Antônio warmed?
Yes: Santo Antônio warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Santo Antônio?
The wettest day measured in Santo Antônio between 1940 and 2025 was 12 February 1986, with 114 mm of rain in 24 hours.
What was the windiest day in Santo Antônio?
The windiest day measured in Santo Antônio between 1940 and 2025 was 17 June 1967, with winds reaching 32.9 km/h.
What is the warmest month in Santo Antônio?
The warmest month in Santo Antônio is January (26.8 °C on average); the coldest is July (24.4 °C).
How much does it rain in Santo Antônio?
Santo Antônio receives on average 520 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Santo Antônio?
Santo Antônio gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
Are there tropical nights in Santo Antônio?
Yes: Santo Antônio has on average 360 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Santo Antônio?
In Santo Antônio, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 9 March 1988, and the lowest was 18.1 °C on 1 August 1986.
Compare Santo Antônio with another city
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Nearby cities
The climate around Santo Antônio