Official observations at Cape Town International Airport—the market's resolution source—confirm the highest temperature on April 27, 2026, reached 17°C, driving trader consensus to near-certainty on this outcome. This aligns with South African Weather Service (SAWS) pre-event outlooks and global model runs from ECMWF and GFS, which forecasted partly cloudy skies, isolated showers, and coastal gusts from lingering cold front remnants, capping daytime heating amid limited solar insolation and atmospheric stability. Morning readings near 12–15°C further supported subdued highs consistent with historical April variability in the Western Cape, where autumnal cold outbreaks often suppress temperatures below seasonal averages of 22–23°C. Revisions are improbable barring rare instrument errors, with final SAWS verification solidifying the data.
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 April 27?
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$33,259 Vol.
$33,259 Vol.
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
Yes
18°C
No
19°C
No
20°C
No
21°C or higher
No
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$33,259 Vol.
$33,259 Vol.
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
Yes
18°C
No
19°C
No
20°C
No
21°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: Apr 25, 2026, 12:59 AM ET
Resolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: 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.
Resolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations at Cape Town International Airport—the market's resolution source—confirm the highest temperature on April 27, 2026, reached 17°C, driving trader consensus to near-certainty on this outcome. This aligns with South African Weather Service (SAWS) pre-event outlooks and global model runs from ECMWF and GFS, which forecasted partly cloudy skies, isolated showers, and coastal gusts from lingering cold front remnants, capping daytime heating amid limited solar insolation and atmospheric stability. Morning readings near 12–15°C further supported subdued highs consistent with historical April variability in the Western Cape, where autumnal cold outbreaks often suppress temperatures below seasonal averages of 22–23°C. Revisions are improbable barring rare instrument errors, with final SAWS verification solidifying the data.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

Beware of external links.
Beware of external links.
Frequently Asked Questions