Recent forecasts from models and the South African Weather Service indicate a transitional high-pressure ridge building over the Western Cape after mid-June cold fronts and cut-off lows, supporting daytime maxima near 20–22°C for Cape Town on June 21. This setup favors moderate warming under clearer skies and lighter winds compared to the cooler, windier conditions of the prior week, though residual marine air from the Benguela Current and possible afternoon sea breezes could cap peaks. The tight clustering of market-implied probabilities around 22–24°C reflects uncertainty in exact ridge strength, cloud cover timing, and localized orographic effects from Table Mountain, with historical June averages near 18°C providing baseline context but limited guidance for this specific synoptic evolution. Updated model runs and official briefings in the next 48 hours will likely refine these variables ahead of market 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 June 21?
22°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$45,642 Vol.
$45,642 Vol.
18°C or below
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C
No
26°C
No
27°C
No
28°C or higher
No
22°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$45,642 Vol.
$45,642 Vol.
18°C or below
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C
No
26°C
No
27°C
No
28°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 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: Jun 19, 2026, 1:04 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 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.
Resolution Source
https://www.wunderground.com/history/daily/za/matroosfontein/FACTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent forecasts from models and the South African Weather Service indicate a transitional high-pressure ridge building over the Western Cape after mid-June cold fronts and cut-off lows, supporting daytime maxima near 20–22°C for Cape Town on June 21. This setup favors moderate warming under clearer skies and lighter winds compared to the cooler, windier conditions of the prior week, though residual marine air from the Benguela Current and possible afternoon sea breezes could cap peaks. The tight clustering of market-implied probabilities around 22–24°C reflects uncertainty in exact ridge strength, cloud cover timing, and localized orographic effects from Table Mountain, with historical June averages near 18°C providing baseline context but limited guidance for this specific synoptic evolution. Updated model runs and official briefings in the next 48 hours will likely refine these variables ahead of market 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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