Recent South African Weather Service and model guidance for Cape Town points to a typical mid-winter setup with Atlantic moderation keeping daytime maxima near the seasonal 16–18 °C average. Trader sentiment clusters tightly around 15–18 °C because small differences in the timing or strength of an approaching cold front, or a transient berg-wind episode, can shift the daily peak by 1–2 °C. Ensemble spreads remain modest this close to the event, yet coastal cloud cover, wind direction, and exact frontal passage still create enough forecast uncertainty to keep the four leading outcomes within a few percentage points of one another.
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 23?
17°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$41,686 Vol.
$41,686 Vol.
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%
$41,686 Vol.
$41,686 Vol.
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
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 21, 2026, 1:05 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 South African Weather Service and model guidance for Cape Town points to a typical mid-winter setup with Atlantic moderation keeping daytime maxima near the seasonal 16–18 °C average. Trader sentiment clusters tightly around 15–18 °C because small differences in the timing or strength of an approaching cold front, or a transient berg-wind episode, can shift the daily peak by 1–2 °C. Ensemble spreads remain modest this close to the event, yet coastal cloud cover, wind direction, and exact frontal passage still create enough forecast uncertainty to keep the four leading outcomes within a few percentage points of one another.
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