São João del Rei climate — normals and trends
São João del Rei (Brazil) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 19.3 °C and it receives 1,319 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 (21.7 °C on average) and the coldest is July (16.1 °C). Rainfall peaks in December.
São João del Rei averages 0 frost days, 11 hot days (≥ 30 °C) and 147 rainy days per year.
São João del Rei has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 35.5 °C (on 18 October 1963) and the coldest 1.6 °C (on 1 June 1979).
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 João del ReiMinas Gerais
- coords
- -21.14°, -44.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
19.3°C
Average daily high
24.5°C
Average daily low
15.2°C
Annual rainfall
1,319mm
Sunshine / day
9.2h
Mean relative humidity
77%
Average peak wind
13.7km/h
Seasonal range
5.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
147 d/yr
Annual snowfall
0.0 cm
Average feels-like high
25.8 °C
Average feels-like low
15.2 °C
Average peak gust
30.7 km/h
Tropical nights (≥ 20 °C)
4 d/yr
Solar radiation
17.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °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
35.5 °C
18 October 1963
Coldest day
1.6 °C
1 June 1979
Wettest day
132 mm
19 January 1985
Windiest day
33.0 km/h
20 May 1955
Strongest gust
77.8 km/h
30 July 1989
Hottest feels-like
38.2 °C
15 November 2023
Coldest feels-like
-1.6 °C
1 June 1979
Sunniest day
13.3 h
19 December 1946
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 | 27.4 °C | +1.1 °C | 210 mm | -24 mm |
| Feb | 28.7 °C | +2.2 °C | 24 mm | -136 mm |
| Mar | 27.4 °C | +1.5 °C | 96 mm | -53 mm |
| Apr | 24.8 °C | +0.2 °C | 67 mm | +9 mm |
| May | 23.1 °C | +0.4 °C | 2 mm | -34 mm |
| Jun | 22.9 °C | +1.0 °C | 6 mm | -15 mm |
| Jul | 22.5 °C | +0.6 °C | 6 mm | -10 mm |
| Aug | 24.1 °C | +0.4 °C | 11 mm | -11 mm |
| Sep | 25.5 °C | +0.4 °C | 13 mm | -48 mm |
| Oct | 25.4 °C | +0.2 °C | 107 mm | -23 mm |
| Nov | 26.2 °C | +1.2 °C | 105 mm | -85 mm |
| Dec | 27.6 °C | +2.1 °C | 168 mm | -75 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 João del Rei?
São João del Rei has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 19.3 °C and it receives 1,319 mm of precipitation per year.
What is the hottest day ever recorded in São João del Rei?
The hottest day measured in São João del Rei between 1940 and 2025 was 18 October 1963, reaching 35.5 °C.
What is the coldest day in São João del Rei?
The coldest day measured in São João del Rei between 1940 and 2025 was 1 June 1979, at 1.6 °C.
Does it snow in São João del Rei?
Almost never: São João del Rei sees virtually no snow, with about 0 frost days per year.
Has the climate of São João del Rei warmed?
Yes: São João del Rei warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in São João del Rei?
The wettest day measured in São João del Rei between 1940 and 2025 was 19 January 1985, with 132 mm of rain in 24 hours.
What was the windiest day in São João del Rei?
The windiest day measured in São João del Rei between 1940 and 2025 was 20 May 1955, with winds reaching 33.0 km/h.
What is the warmest month in São João del Rei?
The warmest month in São João del Rei is February (21.7 °C on average); the coldest is July (16.1 °C).
How much does it rain in São João del Rei?
São João del Rei receives on average 1,319 mm of precipitation per year, spread over about 147 rainy days.
Is it sunny in São João del Rei?
São João del Rei gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
Are there tropical nights in São João del Rei?
Yes: São João del Rei has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in São João del Rei?
In São João del Rei, between 1940 and 2025, the highest apparent temperature reached 38.2 °C on 15 November 2023, and the lowest was -1.6 °C on 1 June 1979.
Compare São João del Rei with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around São João del Rei