Official South African Weather Service (SAWS) observations from the Cape Town International Airport station—the authoritative source for this market—confirm the highest temperature on April 20, 2026, reached exactly 17°C, driving trader consensus to a 100% implied probability for that outcome. This reflects a cool, overcast autumn day marked by isolated showers, fresh westerly winds up to 20-30 km/h, and lingering effects from a cold front that made landfall days earlier, suppressing typical April highs of 22°C. Model consensus from SAWS and private forecasters had anticipated subdued temperatures due to persistent cloud cover and frontal moisture. While final data ratification is pending, revisions are exceedingly rare given automated station reliability; only a verified measurement error or overlooked peak could challenge this positioning.
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 20?
Highest temperature in Cape Town on April 20?
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$63,420 Vol.
$63,420 Vol.
Apr 20, 2026
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%
$63,420 Vol.
$63,420 Vol.
Apr 20, 2026
11°C or below
$1,247 Vol.
No
12°C
$1,664 Vol.
No
13°C
$2,461 Vol.
No
14°C
$4,575 Vol.
No
15°C
$4,461 Vol.
No
16°C
$28,784 Vol.
No
17°C
$5,303 Vol.
Yes
18°C
$3,294 Vol.
No
19°C
$6,440 Vol.
No
20°C
$2,399 Vol.
No
21°C or higher
$2,791 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Cape Town International Airport Station in degrees Celsius on 20 Apr '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 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.Official South African Weather Service (SAWS) observations from the Cape Town International Airport station—the authoritative source for this market—confirm the highest temperature on April 20, 2026, reached exactly 17°C, driving trader consensus to a 100% implied probability for that outcome. This reflects a cool, overcast autumn day marked by isolated showers, fresh westerly winds up to 20-30 km/h, and lingering effects from a cold front that made landfall days earlier, suppressing typical April highs of 22°C. Model consensus from SAWS and private forecasters had anticipated subdued temperatures due to persistent cloud cover and frontal moisture. While final data ratification is pending, revisions are exceedingly rare given automated station reliability; only a verified measurement error or overlooked peak could challenge this positioning.
This market will resolve to the temperature range that contains the highest temperature recorded at the Cape Town International Airport Station in degrees Celsius on 20 Apr '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 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.
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 18, 2026, 12:20 AM ET
Volume
$63,420End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:20 AM ETResolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Cape Town International Airport Station in degrees Celsius on 20 Apr '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 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.Official South African Weather Service (SAWS) observations from the Cape Town International Airport station—the authoritative source for this market—confirm the highest temperature on April 20, 2026, reached exactly 17°C, driving trader consensus to a 100% implied probability for that outcome. This reflects a cool, overcast autumn day marked by isolated showers, fresh westerly winds up to 20-30 km/h, and lingering effects from a cold front that made landfall days earlier, suppressing typical April highs of 22°C. Model consensus from SAWS and private forecasters had anticipated subdued temperatures due to persistent cloud cover and frontal moisture. While final data ratification is pending, revisions are exceedingly rare given automated station reliability; only a verified measurement error or overlooked peak could challenge this positioning.
This market will resolve to the temperature range that contains the highest temperature recorded at the Cape Town International Airport Station in degrees Celsius on 20 Apr '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 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.
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.
Volume
$63,420End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:20 AM ETResolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official South African Weather Service (SAWS) observations from the Cape Town International Airport station—the authoritative source for this market—confirm the highest temperature on April 20, 2026, reached exactly 17°C, driving trader consensus to a 100% implied probability for that outcome. This reflects a cool, overcast autumn day marked by isolated showers, fresh westerly winds up to 20-30 km/h, and lingering effects from a cold front that made landfall days earlier, suppressing typical April highs of 22°C. Model consensus from SAWS and private forecasters had anticipated subdued temperatures due to persistent cloud cover and frontal moisture. While final data ratification is pending, revisions are exceedingly rare given automated station reliability; only a verified measurement error or overlooked peak could challenge this positioning.
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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