Official observations from the South African Weather Service (SAWS) at Cape Town International Airport—the market's designated recording station—confirm the highest temperature on May 9 reached exactly 19°C, driving trader consensus to a near-certain 100% implied probability. This aligns with pre-event SAWS forecasts projecting maxima near 19°C under partly cloudy skies, light northwesterly winds, and typical autumn cooling patterns, where seasonal averages hover around 22°C but cooler air masses suppressed peaks. Historical May data at the airport shows similar subdued highs during transitional weather, with no model disagreements. Realistic challenges are minimal post-measurement, limited to rare quality-control revisions from instrument anomalies, though SAWS data is highly reliable; final bulletins typically affirm initial reports within 24 hours.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Cape Town on May 9?
19°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$30,690 Vol.
$30,690 Vol.
14°C or below
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
Yes
20°C
No
21°C
No
22°C
No
23°C
No
24°C or higher
No
19°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$30,690 Vol.
$30,690 Vol.
14°C or below
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
Yes
20°C
No
21°C
No
22°C
No
23°C
No
24°C or higher
No
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 Cape Town International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/za/matroosfontein/FACT.
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 7, 2026, 12:21 AM ET
Resolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
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 Cape Town International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/za/matroosfontein/FACT.
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.
Resolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
Official observations from the South African Weather Service (SAWS) at Cape Town International Airport—the market's designated recording station—confirm the highest temperature on May 9 reached exactly 19°C, driving trader consensus to a near-certain 100% implied probability. This aligns with pre-event SAWS forecasts projecting maxima near 19°C under partly cloudy skies, light northwesterly winds, and typical autumn cooling patterns, where seasonal averages hover around 22°C but cooler air masses suppressed peaks. Historical May data at the airport shows similar subdued highs during transitional weather, with no model disagreements. Realistic challenges are minimal post-measurement, limited to rare quality-control revisions from instrument anomalies, though SAWS data is highly reliable; final bulletins typically affirm initial reports within 24 hours.
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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