Average Weather in São Paulo Brazil
In São Paulo, the summers are warm, muggy, wet, and overcast and the winters are cool and partly cloudy. Over the course of the year, the temperature typically varies from 56°F to 83°F and is rarely below 49°F or above 91°F.
The warm season lasts for 3.2 months, from December 14 to March 21, with an average daily high temperature above 81°F. The hottest day of the year is February 13, with an average high of 83°F and low of 68°F.
The cool season lasts for 3.0 months, from May 12 to August 11, with an average daily high temperature below 74°F. The coldest day of the year is July 22, with an average low of 56°F and high of 72°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In São Paulo, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in São Paulo begins around March 28 and lasts for 6.5 months, ending around October 12. On August 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.
The cloudier part of the year begins around October 12 and lasts for 5.5 months, ending around March 28. On January 14, the cloudiest day of the year, the sky is overcast or mostly cloudy 73% of the time, and clear, mostly clear, or partly cloudy 27% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in São Paulo varies very significantly throughout the year.
The wetter season lasts 5.5 months, from October 20 to April 4, with a greater than 42% chance of a given day being a wet day. The chance of a wet day peaks at 69% on January 19.
The drier season lasts 6.5 months, from April 4 to October 20. The smallest chance of a wet day is 14% on August 16.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 69% on January 19.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. São Paulo experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in São Paulo. The most rain falls during the 31 days centered around January 25, with an average total accumulation of 8.7 inches.
The least rain falls around August 8, with an average total accumulation of 1.5 inches.
Average Monthly Rainfall
The length of the day in São Paulo varies over the course of the year. In 2017, the shortest day is June 21, with 10 hours, 41 minutes of daylight; the longest day is December 21, with 13 hours, 35 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:34 AM on October 14, and the latest sunrise is 1 hour, 22 minutes later at 6:56 AM on February 18. The earliest sunset is at 5:27 PM on June 6, and the latest sunset is 2 hours, 31 minutes later at 7:58 PM on January 13.
Daylight saving time (DST) is observed in São Paulo during 2017, starting in the spring on October 15 and ending in the fall on February 18.
Sunrise & Sunset with Twilight and Daylight Saving Time
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
São Paulo experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 6.0 months, from October 26 to April 25, during which time the comfort level is muggy, oppressive, or miserable at least 17% of the time. The muggiest day of the year is February 9, with muggy conditions 67% of the time.
The least muggy day of the year is July 9, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in São Paulo experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.3 months, from August 20 to December 30, with average wind speeds of more than 4.1 miles per hour. The windiest day of the year is September 26, with an average hourly wind speed of 4.7 miles per hour.
The calmer time of year lasts for 7.7 months, from December 30 to August 20. The calmest day of the year is February 24, with an average hourly wind speed of 3.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in São Paulo varies throughout the year.
The wind is most often from the north for 1.6 months, from June 2 to July 20, with a peak percentage of 37% on June 22. The wind is most often from the east for 10 months, from July 20 to June 2, with a peak percentage of 33% on January 1.
São Paulo is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.7 months, from December 28 to April 20, with an average temperature above 78°F. The day of the year with the warmest water is February 14, with an average temperature of 80°F.
The time of year with cooler water lasts for 3.4 months, from June 24 to October 6, with an average temperature below 70°F. The day of the year with the coolest water is August 7, with an average temperature of 68°F.
Average Water Temperature
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.8 months, from October 15 to January 8, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest day of the year is November 23, with an average of 6.5 kWh.
The darker period of the year lasts for 2.7 months, from May 9 to July 31, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest day of the year is June 25, with an average of 3.8 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of São Paulo are -23.548 deg latitude, -46.636 deg longitude, and 2,457 ft elevation.
The topography within 2 miles of São Paulo contains only modest variations in elevation, with a maximum elevation change of 427 feet and an average elevation above sea level of 2,497 feet. Within 10 miles contains only modest variations in elevation (1,657 feet). Within 50 miles contains very significant variations in elevation (5,630 feet).
The area within 2 miles of São Paulo is covered by artificial surfaces (99%), within 10 miles by artificial surfaces (86%), and within 50 miles by trees (46%) and water (15%).
This report illustrates the typical weather in São Paulo, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in São Paulo.
For each station, the records are corrected for the elevation difference between that station and São Paulo according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at São Paulo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between São Paulo and a given station.
The stations contributing to this reconstruction are: Congonhas-São Paulo Airport (72%, 9 kilometers, south); São Paulo–Guarulhos International Airport (25%, 21 kilometers, northeast); and Viracopos International Airport (3.4%, 79 kilometers, northwest).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.