Lowest Temperature in São Paulo on October 18, 2026

Tracking Low Temperatures at Guarulhos Airport for Oct 2026

Prediction markets have established a specific resolution criterion for the lowest temperature recorded at São Paulo–Guarulhos International Airport on October 18, 2026. According to Polymarket, the contract will settle based on official temperature readings captured by NOAA at the airport station, measured in whole degrees Celsius.

The forecasting platform relies primarily on data published under the “Temp” column of official NOAA observation logs for the specific date. If primary NOAA metrics remain unavailable by 11:59 PM ET on the day following the observation, the rules stipulate that the platform will pivot to the Weather Underground Daily Observations table to determine the final bracket.

Data Sources and Resolution Mechanics

The official resolution depends on digital records hosted through federal meteorological tracking systems, specifically utilizing the NOAA time series database for site SBGR. The resolution source for this market measures temperatures to whole degrees Celsius.

Should technical malfunctions or data anomalies occur at the source, the market rules allow a grace period of up to seven calendar days for administrators to verify corrective updates. Any updates or modifications to the temperature figures logged for this market’s period will remain eligible until the initial data point for the subsequent date goes live, past which point further adjustments will be disregarded.

Frequently Asked Questions

What happens if weather data is completely missing by the deadline?

If neither NOAA nor the backup Weather Underground table provides valid observations for October 18, 2026, by 11:59 PM ET on the day following the observation date, the market will resolve to the lowest bracket.

How are units of measurement handled on the platform?

To toggle between Fahrenheit and Celsius, click the “Switch to Metric Units” button until the relevant table displays °C.

When does the market officially close for trading?

Settlement for this market occurs either when the resolution source releases the first data point for the next date, or at 11:59 PM ET on the day after the observation date, whichever happens first.