São Miguel climate — normals and trends
São Miguel (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.4 °C and it receives 861 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 November (27.9 °C on average) and the coldest is April (25.3 °C). Rainfall peaks in March.
São Miguel averages 0 frost days, 267 hot days (≥ 30 °C) and 103 rainy days per year.
São Miguel has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.5 °C (on 22 February 1998) and the coldest 16.3 °C (on 26 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
São MiguelRio Grande do Norte
- coords
- -6.21°, -38.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.4°C
Average daily high
31.6°C
Average daily low
21.7°C
Annual rainfall
861mm
Sunshine / day
11.0h
Mean relative humidity
63%
Average peak wind
17.8km/h
Seasonal range
2.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
267 d/yr
Rainy days (≥ 1 mm)
103 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.2 °C
Average feels-like low
23.4 °C
Average peak gust
39.0 km/h
Tropical nights (≥ 20 °C)
338 d/yr
Solar radiation
21.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.16 · 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
37.5 °C
22 February 1998
Coldest day
16.3 °C
26 July 1975
Wettest day
164 mm
28 February 1970
Windiest day
32.1 km/h
23 June 1942
Strongest gust
63.7 km/h
31 August 2022
Hottest feels-like
40.2 °C
1 May 1998
Coldest feels-like
15.1 °C
20 July 1967
Sunniest day
12.4 h
6 December 1940
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 | 31.8 °C | -0.4 °C | 176 mm | +67 mm |
| Feb | 31.6 °C | +0.6 °C | 76 mm | -80 mm |
| Mar | 30.8 °C | +0.8 °C | 109 mm | -119 mm |
| Apr | 31.5 °C | +1.8 °C | 56 mm | -127 mm |
| May | 31.3 °C | +1.4 °C | 35 mm | -50 mm |
| Jun | 30.9 °C | +1.0 °C | 20 mm | -11 mm |
| Jul | 31.5 °C | +1.1 °C | 7 mm | -9 mm |
| Aug | 32.1 °C | +0.3 °C | 7 mm | +2 mm |
| Sep | 33.1 °C | 0.0 °C | 2 mm | -1 mm |
| Oct | 34.2 °C | +0.3 °C | 0 mm | -7 mm |
| Nov | 34.6 °C | +0.7 °C | 0 mm | -8 mm |
| Dec | 34.0 °C | +0.5 °C | 6 mm | -25 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 São Miguel?
São Miguel has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 861 mm of precipitation per year.
What is the hottest day ever recorded in São Miguel?
The hottest day measured in São Miguel between 1940 and 2025 was 22 February 1998, reaching 37.5 °C.
What is the coldest day in São Miguel?
The coldest day measured in São Miguel between 1940 and 2025 was 26 July 1975, at 16.3 °C.
Does it snow in São Miguel?
Almost never: São Miguel sees virtually no snow, with about 0 frost days per year.
Has the climate of São Miguel warmed?
Yes: São Miguel warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in São Miguel?
The wettest day measured in São Miguel between 1940 and 2025 was 28 February 1970, with 164 mm of rain in 24 hours.
What was the windiest day in São Miguel?
The windiest day measured in São Miguel between 1940 and 2025 was 23 June 1942, with winds reaching 32.1 km/h.
What is the warmest month in São Miguel?
The warmest month in São Miguel is November (27.9 °C on average); the coldest is April (25.3 °C).
How much does it rain in São Miguel?
São Miguel receives on average 861 mm of precipitation per year, spread over about 103 rainy days.
Is it sunny in São Miguel?
São Miguel gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
Are there tropical nights in São Miguel?
Yes: São Miguel has on average 338 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in São Miguel?
In São Miguel, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 1 May 1998, and the lowest was 15.1 °C on 20 July 1967.
Compare São Miguel with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around São Miguel