TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 4, 8:00 AM EST
Polymarket
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 4 Jul '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Sao Paulo-Guarulhos International Airport Station, 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 until the first data point for the following date has been published on the resolution source. 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. Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
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 4 Jul '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Sao Paulo-Guarulhos International Airport Station, 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 until the first data point for the following date has been published on the resolution source. 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. Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Prediction market odds reflect decentralized trader consensus rather than a single analyst view, often incorporating diverse data sources and real-time adjustments. While traditional weather forecasters rely on meteorological models and historical patterns, this market prices in trader beliefs about temperature outcomes, which can diverge from official forecasts. Comparing the two reveals whether the crowd is more bullish or bearish than institutional predictions. Prediction markets tend to update faster when new information surfaces, whereas analyst forecasts may lag by hours or days. Both sources offer value: analysts provide scientific rigor, while markets capture dynamic risk sentiment.
This market resolves around Jul 4, 2026, once the highest temperature recorded in São Paulo on July 4 is verifiable from credible public sources. The outcome is determined by comparing trader predictions against the actual peak temperature reported for that day. Resolution typically occurs within hours of the market end time, once official data is confirmed and the platform processes the settlement. Traders who correctly predicted the temperature range receive their payout, while incorrect positions expire worthless. The exact temperature reading becomes the single source of truth for determining all winning and losing shares.
Weather pattern shifts, updated meteorological forecasts, and seasonal climate anomalies can all influence trader positioning in this market. Major weather systems moving toward São Paulo, changes in atmospheric pressure, or unexpected heat waves would likely trigger sharp price movements as traders reassess probabilities. News about climate events affecting South America or regional temperature records may also sway sentiment. As July 4 approaches, real-time weather updates and short-term forecasts become more precise, typically narrowing the range of plausible outcomes and concentrating trading volume around the most likely temperature bands. Early-week forecasts often trigger larger repricing than late-stage adjustments.