Latest meteorological forecasts for Cape Town indicate stable high-pressure conditions over the Western Cape, with models converging on a daily maximum near 21–22°C for May 18. This aligns with mid-autumn patterns where the cool Benguela Current moderates temperatures, keeping averages around 19°C while occasional warmer air intrusions push peaks slightly higher. Recent observations, including a 21.6°C reading on May 16, support the current market-implied odds favoring 21°C as the most probable outcome. South African Weather Service updates and ensemble model runs expected over the next 24 hours will likely refine these probabilities ahead of resolution.
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 18?
Highest temperature in Cape Town on May 18?
21°C 44%
22°C 27%
20°C 11.8%
23°C 11%
NEW
NEW
May 18, 2026
15°C or below
<1%
16°C
<1%
17°C
<1%
18°C
1%
19°C
2%
20°C
12%
21°C
44%
22°C
27%
23°C
11%
24°C
1%
25°C or higher
1%
21°C 44%
22°C 27%
20°C 11.8%
23°C 11%
NEW
NEW
May 18, 2026
15°C or below
$342 Vol.
<1%
16°C
$541 Vol.
<1%
17°C
$503 Vol.
<1%
18°C
$869 Vol.
1%
19°C
$802 Vol.
2%
20°C
$679 Vol.
12%
21°C
$1,772 Vol.
44%
22°C
$1,023 Vol.
27%
23°C
$1,336 Vol.
11%
24°C
$914 Vol.
1%
25°C or higher
$391 Vol.
1%
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 18 May '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.Latest meteorological forecasts for Cape Town indicate stable high-pressure conditions over the Western Cape, with models converging on a daily maximum near 21–22°C for May 18. This aligns with mid-autumn patterns where the cool Benguela Current moderates temperatures, keeping averages around 19°C while occasional warmer air intrusions push peaks slightly higher. Recent observations, including a 21.6°C reading on May 16, support the current market-implied odds favoring 21°C as the most probable outcome. South African Weather Service updates and ensemble model runs expected over the next 24 hours will likely refine these probabilities ahead of resolution.
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 18 May '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: May 16, 2026, 12:06 AM ET
Volume
$9,174End Date
May 18, 2026Market Opened
May 16, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTThis market will resolve to the temperature range that contains the highest temperature recorded at the Cape Town International Airport Station in degrees Celsius on 18 May '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.Latest meteorological forecasts for Cape Town indicate stable high-pressure conditions over the Western Cape, with models converging on a daily maximum near 21–22°C for May 18. This aligns with mid-autumn patterns where the cool Benguela Current moderates temperatures, keeping averages around 19°C while occasional warmer air intrusions push peaks slightly higher. Recent observations, including a 21.6°C reading on May 16, support the current market-implied odds favoring 21°C as the most probable outcome. South African Weather Service updates and ensemble model runs expected over the next 24 hours will likely refine these probabilities ahead of resolution.
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 18 May '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
$9,174End Date
May 18, 2026Market Opened
May 16, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTLatest meteorological forecasts for Cape Town indicate stable high-pressure conditions over the Western Cape, with models converging on a daily maximum near 21–22°C for May 18. This aligns with mid-autumn patterns where the cool Benguela Current moderates temperatures, keeping averages around 19°C while occasional warmer air intrusions push peaks slightly higher. Recent observations, including a 21.6°C reading on May 16, support the current market-implied odds favoring 21°C as the most probable outcome. South African Weather Service updates and ensemble model runs expected over the next 24 hours will likely refine these probabilities ahead of resolution.
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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