Recent forecasts from Brazil’s INMET and global models point to a daytime high near 21°C in São Paulo on May 18, driven by a passing cold front that introduced cooler maritime air and widespread cloud cover limiting solar heating. This places the expected maximum slightly below the city’s mid-May climatological average of 22–24°C under typical autumn subsidence and light easterly flow. Trader sentiment clusters tightly around 20–22°C because small shifts in frontal timing or residual moisture could alter peak temperatures by 1–2°C before official resolution at standard 2-meter observations from São Paulo-Guarulhos and INMET stations. Model consensus remains moderate amid ongoing uncertainties in exact cloud persistence and boundary-layer mixing.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Sao Paulo on May 18?
Highest temperature in Sao Paulo on May 18?
21°C 39%
20°C 27%
22°C 20%
19°C 7%
NEW
$21,734 Vol.
NEW
$21,734 Vol.
May 18, 2026
15°C or below
<1%
16°C
<1%
17°C
<1%
18°C
3%
19°C
7%
20°C
27%
21°C
39%
22°C
20%
23°C
6%
24°C
1%
25°C or higher
<1%
21°C 39%
20°C 27%
22°C 20%
19°C 7%
NEW
$21,734 Vol.
NEW
$21,734 Vol.
May 18, 2026
15°C or below
$861 Vol.
<1%
16°C
$717 Vol.
<1%
17°C
$2,121 Vol.
<1%
18°C
$3,727 Vol.
3%
19°C
$3,991 Vol.
7%
20°C
$3,615 Vol.
27%
21°C
$1,497 Vol.
39%
22°C
$1,751 Vol.
20%
23°C
$1,326 Vol.
6%
24°C
$1,021 Vol.
1%
25°C or higher
$1,114 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 18 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Recent forecasts from Brazil’s INMET and global models point to a daytime high near 21°C in São Paulo on May 18, driven by a passing cold front that introduced cooler maritime air and widespread cloud cover limiting solar heating. This places the expected maximum slightly below the city’s mid-May climatological average of 22–24°C under typical autumn subsidence and light easterly flow. Trader sentiment clusters tightly around 20–22°C because small shifts in frontal timing or residual moisture could alter peak temperatures by 1–2°C before official resolution at standard 2-meter observations from São Paulo-Guarulhos and INMET stations. Model consensus remains moderate amid ongoing uncertainties in exact cloud persistence and boundary-layer mixing.
This market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 18 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: May 16, 2026, 12:03 AM ET
Volume
$21,734End Date
May 18, 2026Market Opened
May 16, 2026, 12:03 AM ETResolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRThis market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 18 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Recent forecasts from Brazil’s INMET and global models point to a daytime high near 21°C in São Paulo on May 18, driven by a passing cold front that introduced cooler maritime air and widespread cloud cover limiting solar heating. This places the expected maximum slightly below the city’s mid-May climatological average of 22–24°C under typical autumn subsidence and light easterly flow. Trader sentiment clusters tightly around 20–22°C because small shifts in frontal timing or residual moisture could alter peak temperatures by 1–2°C before official resolution at standard 2-meter observations from São Paulo-Guarulhos and INMET stations. Model consensus remains moderate amid ongoing uncertainties in exact cloud persistence and boundary-layer mixing.
This market will resolve to the temperature range that contains the highest temperature recorded at the Sao Paulo-Guarulhos International Airport Station in degrees Celsius on 18 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Volume
$21,734End Date
May 18, 2026Market Opened
May 16, 2026, 12:03 AM ETResolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRRecent forecasts from Brazil’s INMET and global models point to a daytime high near 21°C in São Paulo on May 18, driven by a passing cold front that introduced cooler maritime air and widespread cloud cover limiting solar heating. This places the expected maximum slightly below the city’s mid-May climatological average of 22–24°C under typical autumn subsidence and light easterly flow. Trader sentiment clusters tightly around 20–22°C because small shifts in frontal timing or residual moisture could alter peak temperatures by 1–2°C before official resolution at standard 2-meter observations from São Paulo-Guarulhos and INMET stations. Model consensus remains moderate amid ongoing uncertainties in exact cloud persistence and boundary-layer mixing.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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