Santo Anastácio climate — normals and trends
Santo Anastácio (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.3 °C and it receives 1,311 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 (25.6 °C on average) and the coldest is June (19.6 °C). Rainfall peaks in January.
Santo Anastácio averages 0 frost days, 134 hot days (≥ 30 °C) and 143 rainy days per year.
Santo Anastácio has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The hottest day of the period reached 42.6 °C (on 6 October 2020) and the coldest 0.7 °C (on 18 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
Santo AnastácioSão Paulo
- coords
- -21.98°, -51.65°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.3°C
Average daily high
28.6°C
Average daily low
19.1°C
Annual rainfall
1,311mm
Sunshine / day
9.9h
Mean relative humidity
71%
Average peak wind
14.0km/h
Seasonal range
6.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
134 d/yr
Rainy days (≥ 1 mm)
143 d/yr
Annual snowfall
0.0 cm
Average feels-like high
31.2 °C
Average feels-like low
19.8 °C
Average peak gust
31.1 km/h
Tropical nights (≥ 20 °C)
177 d/yr
Solar radiation
18.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.61 · 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
42.6 °C
6 October 2020
Coldest day
0.7 °C
18 July 1975
Wettest day
131 mm
1 January 1942
Windiest day
44.6 km/h
15 September 1956
Strongest gust
93.2 km/h
22 September 2025
Hottest feels-like
44.3 °C
29 October 2007
Coldest feels-like
-3.8 °C
18 July 1975
Sunniest day
13.0 h
17 December 2024
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 33.9 °C | +3.8 °C | 95 mm | -112 mm |
| Feb | 32.9 °C | +2.9 °C | 102 mm | -81 mm |
| Mar | 33.9 °C | +4.1 °C | 58 mm | -77 mm |
| Apr | 28.7 °C | +0.2 °C | 147 mm | +75 mm |
| May | 27.9 °C | +1.9 °C | 21 mm | -49 mm |
| Jun | 25.1 °C | +0.1 °C | 51 mm | -1 mm |
| Jul | 26.2 °C | +0.6 °C | 3 mm | -30 mm |
| Aug | 28.7 °C | +0.6 °C | 1 mm | -33 mm |
| Sep | 33.3 °C | +3.6 °C | 11 mm | -59 mm |
| Oct | 30.1 °C | +0.1 °C | 85 mm | -44 mm |
| Nov | 30.4 °C | +0.3 °C | 104 mm | -36 mm |
| Dec | 31.5 °C | +1.5 °C | 175 mm | -14 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 Anastácio?
Santo Anastácio has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.3 °C and it receives 1,311 mm of precipitation per year.
What is the hottest day ever recorded in Santo Anastácio?
The hottest day measured in Santo Anastácio between 1940 and 2025 was 6 October 2020, reaching 42.6 °C.
What is the coldest day in Santo Anastácio?
The coldest day measured in Santo Anastácio between 1940 and 2025 was 18 July 1975, at 0.7 °C.
Does it snow in Santo Anastácio?
Almost never: Santo Anastácio sees virtually no snow, with about 0 frost days per year.
Has the climate of Santo Anastácio warmed?
Yes: Santo Anastácio warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Santo Anastácio?
The wettest day measured in Santo Anastácio between 1940 and 2025 was 1 January 1942, with 131 mm of rain in 24 hours.
What was the windiest day in Santo Anastácio?
The windiest day measured in Santo Anastácio between 1940 and 2025 was 15 September 1956, with winds reaching 44.6 km/h.
What is the warmest month in Santo Anastácio?
The warmest month in Santo Anastácio is January (25.6 °C on average); the coldest is June (19.6 °C).
How much does it rain in Santo Anastácio?
Santo Anastácio receives on average 1,311 mm of precipitation per year, spread over about 143 rainy days.
Is it sunny in Santo Anastácio?
Santo Anastácio gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Santo Anastácio?
Yes: Santo Anastácio has on average 177 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Santo Anastácio?
In Santo Anastácio, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 29 October 2007, and the lowest was -3.8 °C on 18 July 1975.
Compare Santo Anastácio with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Santo Anastácio