The South African Weather Service (SAWS) latest forecast locks Cape Town's maximum temperature on April 18, 2026, at 17°C under the influence of a strong cold front delivering persistent cloud cover, scattered showers, and gusty westerly winds, with current observations at Cape Town International Airport confirming midday readings around 12–15°C amid overcast skies. This positioning aligns with model consensus from global and regional forecasts, reflecting suppressed daytime heating typical of post-frontal conditions in autumn, well below April climatological averages of 23°C. Trader consensus at 100% implied probability underscores the reliability of SAWS data for market resolution, though an improbable brief clearing late in the day could nudge readings toward 18°C; final observations expected by evening will confirm.
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 18?
Highest temperature in Cape Town on April 18?
17°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$31,130 Vol.
$31,130 Vol.
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
Yes
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C or higher
No
17°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$31,130 Vol.
$31,130 Vol.
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
Yes
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°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 16, 2026, 2:04 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
The South African Weather Service (SAWS) latest forecast locks Cape Town's maximum temperature on April 18, 2026, at 17°C under the influence of a strong cold front delivering persistent cloud cover, scattered showers, and gusty westerly winds, with current observations at Cape Town International Airport confirming midday readings around 12–15°C amid overcast skies. This positioning aligns with model consensus from global and regional forecasts, reflecting suppressed daytime heating typical of post-frontal conditions in autumn, well below April climatological averages of 23°C. Trader consensus at 100% implied probability underscores the reliability of SAWS data for market resolution, though an improbable brief clearing late in the day could nudge readings toward 18°C; final observations expected by evening will confirm.
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