Clear skies and a stable high-pressure system over the Western Cape have produced light south-easterly winds and minimal cloud cover through the night of September 5–6, limiting radiative cooling and supporting an expected overnight minimum near 15 °C according to South African Weather Service guidance and numerical models. This calm synoptic pattern, typical for early spring, has kept temperatures from falling to the 13–14 °C range seen in some earlier model runs, driving the market’s 90 % implied probability on 15 °C. With no significant frontal activity or moisture advection forecast before dawn, the lowest reading is unlikely to reach 14 °C or below unless localized cooling exceeds current guidance. Updated SAWS observations and final 24-hour minimum data will resolve the market once the calendar day closes.
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 6?
15°C 99%
14°C 19%
13°C 7%
11°C or below <1%
$1,136 Vol.
$1,136 Vol.
11°C or below
1%
12°C
1%
13°C
7%
14°C
19%
15°C
99%
16°C
<1%
17°C
<1%
18°C
<1%
19°C
<1%
20°C
<1%
21°C or higher
<1%
15°C 99%
14°C 19%
13°C 7%
11°C or below <1%
$1,136 Vol.
$1,136 Vol.
11°C or below
1%
12°C
1%
13°C
7%
14°C
19%
15°C
99%
16°C
<1%
17°C
<1%
18°C
<1%
19°C
<1%
20°C
<1%
21°C or higher
<1%
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 4, 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...Clear skies and a stable high-pressure system over the Western Cape have produced light south-easterly winds and minimal cloud cover through the night of September 5–6, limiting radiative cooling and supporting an expected overnight minimum near 15 °C according to South African Weather Service guidance and numerical models. This calm synoptic pattern, typical for early spring, has kept temperatures from falling to the 13–14 °C range seen in some earlier model runs, driving the market’s 90 % implied probability on 15 °C. With no significant frontal activity or moisture advection forecast before dawn, the lowest reading is unlikely to reach 14 °C or below unless localized cooling exceeds current guidance. Updated SAWS observations and final 24-hour minimum data will resolve the market once the calendar day closes.
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