Consistent forecast guidance from models including those referenced by the South African Weather Service and international providers projects a maximum of 18°C in Cape Town on August 20, 2026, under the influence of a stable South Atlantic high-pressure system that suppresses significant warming or cooling. This aligns with the city’s August climatology, where average daily highs range from 17–19°C amid light southerly winds, partly cloudy skies, and minimal precipitation. The market’s near-certain 18°C outcome reflects trader consensus on these conditions and official measurement thresholds. Only substantial model errors or unforecasted frontal activity could shift the observed high outside this narrow band by day’s end.
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 August 20?
Highest temperature in Cape Town on August 20?
18°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$22,631 Vol.
$22,631 Vol.
Aug 20, 2026
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
Yes
19°C
No
20°C
No
21°C
No
22°C
No
23°C or higher
No
18°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$22,631 Vol.
$22,631 Vol.
Aug 20, 2026
13°C or below
$38 Vol.
No
14°C
$115 Vol.
No
15°C
$252 Vol.
No
16°C
$937 Vol.
No
17°C
$4,013 Vol.
No
18°C
$4,953 Vol.
Yes
19°C
$4,379 Vol.
No
20°C
$3,188 Vol.
No
21°C
$3,818 Vol.
No
22°C
$757 Vol.
No
23°C or higher
$182 Vol.
No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '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 Cape Town International Airport Station, 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 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.Consistent forecast guidance from models including those referenced by the South African Weather Service and international providers projects a maximum of 18°C in Cape Town on August 20, 2026, under the influence of a stable South Atlantic high-pressure system that suppresses significant warming or cooling. This aligns with the city’s August climatology, where average daily highs range from 17–19°C amid light southerly winds, partly cloudy skies, and minimal precipitation. The market’s near-certain 18°C outcome reflects trader consensus on these conditions and official measurement thresholds. Only substantial model errors or unforecasted frontal activity could shift the observed high outside this narrow band by day’s end.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '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 Cape Town International Airport Station, 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 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 Cape Town International Airport Station in degrees Celsius on 20 Aug '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 Cape Town International Airport Station, 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 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.
Market Opened: Aug 18, 2026, 12:58 AM ET
Volume
$22,631End Date
Aug 20, 2026Market Opened
Aug 18, 2026, 12:58 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 based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '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 Cape Town International Airport Station, 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 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.Consistent forecast guidance from models including those referenced by the South African Weather Service and international providers projects a maximum of 18°C in Cape Town on August 20, 2026, under the influence of a stable South Atlantic high-pressure system that suppresses significant warming or cooling. This aligns with the city’s August climatology, where average daily highs range from 17–19°C amid light southerly winds, partly cloudy skies, and minimal precipitation. The market’s near-certain 18°C outcome reflects trader consensus on these conditions and official measurement thresholds. Only substantial model errors or unforecasted frontal activity could shift the observed high outside this narrow band by day’s end.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '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 Cape Town International Airport Station, 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 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 Cape Town International Airport Station in degrees Celsius on 20 Aug '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 Cape Town International Airport Station, 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 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.
Volume
$22,631End Date
Aug 20, 2026Market Opened
Aug 18, 2026, 12:58 AM ETResolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Consistent forecast guidance from models including those referenced by the South African Weather Service and international providers projects a maximum of 18°C in Cape Town on August 20, 2026, under the influence of a stable South Atlantic high-pressure system that suppresses significant warming or cooling. This aligns with the city’s August climatology, where average daily highs range from 17–19°C amid light southerly winds, partly cloudy skies, and minimal precipitation. The market’s near-certain 18°C outcome reflects trader consensus on these conditions and official measurement thresholds. Only substantial model errors or unforecasted frontal activity could shift the observed high outside this narrow band by day’s end.
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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