Weather forecasts from global models such as GFS, corroborated by local observations at Cape Town International Airport, indicate a minimum temperature of 16°C overnight on September 22, 2026, under partly cloudy skies with light variable winds and no significant cold advection. This aligns with typical early-spring climatology for the region, where September averages hover near 10–13°C but recent days have trended warmer due to persistent high pressure and southerly flow. Trader consensus at 99.6% for exactly 16°C reflects high model agreement and limited uncertainty in the final hours before resolution. A sharper-than-expected nocturnal cooling from clearer skies or a brief frontal passage could push readings to 15°C or below, though current data show low probability of such deviation.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Cape Town on September 22?
16°C 99.5%
$1,104 Vol.
$1,104 Vol.
16°C
100%
16°C 99.5%
$1,104 Vol.
$1,104 Vol.
16°C
100%
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=fact
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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: Sep 20, 2026, 12:31 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=factResolver
0x69c47De9D...The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=fact
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.weather.gov/wrh/timeseries?site=factResolver
0x69c47De9D...Weather forecasts from global models such as GFS, corroborated by local observations at Cape Town International Airport, indicate a minimum temperature of 16°C overnight on September 22, 2026, under partly cloudy skies with light variable winds and no significant cold advection. This aligns with typical early-spring climatology for the region, where September averages hover near 10–13°C but recent days have trended warmer due to persistent high pressure and southerly flow. Trader consensus at 99.6% for exactly 16°C reflects high model agreement and limited uncertainty in the final hours before resolution. A sharper-than-expected nocturnal cooling from clearer skies or a brief frontal passage could push readings to 15°C or below, though current data show low probability of such deviation.
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