Current forecasts from multiple models project Cape Town's overnight low on September 11 around 14–16°C under partly cloudy to overcast skies with persistent south-southeasterly winds of 8–11 m/s. These conditions limit nocturnal radiative cooling while the cold Benguela Current and regional high-pressure patterns maintain moderate spring temperatures. Historical September minima average near 11–13°C, but recent model runs show no strong cold-air advection or clear-sky radiative setup that would push readings to 10°C or below. Conversely, the same winds and marine influence suppress daytime heat retention needed for a 20°C minimum. This narrow band of uncertainty, with limited model spread and no major synoptic shifts in the past 48 hours, underpins the near-even market odds between the extremes.
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 11?
Lowest temperature in Cape Town on September 11?
10°C or below 94%
20°C or higher 83%
11°C 38%
12°C 38%
NEW
NEW
Sep 11, 2026
10°C or below
94%
11°C
38%
12°C
38%
13°C
21%
14°C
23%
15°C
26%
16°C
20%
17°C
8%
18°C
38%
19°C
38%
20°C or higher
83%
10°C or below 94%
20°C or higher 83%
11°C 38%
12°C 38%
NEW
NEW
Sep 11, 2026
10°C or below
$0 Vol.
94%
11°C
$0 Vol.
38%
12°C
$0 Vol.
38%
13°C
$0 Vol.
21%
14°C
$0 Vol.
23%
15°C
$0 Vol.
26%
16°C
$0 Vol.
20%
17°C
$0 Vol.
8%
18°C
$0 Vol.
38%
19°C
$0 Vol.
38%
20°C or higher
$0 Vol.
83%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Cape Town International Airport Station in degrees Celsius on 11 Sep '26.
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.Current forecasts from multiple models project Cape Town's overnight low on September 11 around 14–16°C under partly cloudy to overcast skies with persistent south-southeasterly winds of 8–11 m/s. These conditions limit nocturnal radiative cooling while the cold Benguela Current and regional high-pressure patterns maintain moderate spring temperatures. Historical September minima average near 11–13°C, but recent model runs show no strong cold-air advection or clear-sky radiative setup that would push readings to 10°C or below. Conversely, the same winds and marine influence suppress daytime heat retention needed for a 20°C minimum. This narrow band of uncertainty, with limited model spread and no major synoptic shifts in the past 48 hours, underpins the near-even market odds between the extremes.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Cape Town International Airport Station in degrees Celsius on 11 Sep '26.
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.
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 9, 2026, 12:31 AM ET
Volume
$0End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 12:31 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=factResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Cape Town International Airport Station in degrees Celsius on 11 Sep '26.
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.Current forecasts from multiple models project Cape Town's overnight low on September 11 around 14–16°C under partly cloudy to overcast skies with persistent south-southeasterly winds of 8–11 m/s. These conditions limit nocturnal radiative cooling while the cold Benguela Current and regional high-pressure patterns maintain moderate spring temperatures. Historical September minima average near 11–13°C, but recent model runs show no strong cold-air advection or clear-sky radiative setup that would push readings to 10°C or below. Conversely, the same winds and marine influence suppress daytime heat retention needed for a 20°C minimum. This narrow band of uncertainty, with limited model spread and no major synoptic shifts in the past 48 hours, underpins the near-even market odds between the extremes.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Cape Town International Airport Station in degrees Celsius on 11 Sep '26.
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.
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.
Volume
$0End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 12:31 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=factResolver
0x69c47De9D...Current forecasts from multiple models project Cape Town's overnight low on September 11 around 14–16°C under partly cloudy to overcast skies with persistent south-southeasterly winds of 8–11 m/s. These conditions limit nocturnal radiative cooling while the cold Benguela Current and regional high-pressure patterns maintain moderate spring temperatures. Historical September minima average near 11–13°C, but recent model runs show no strong cold-air advection or clear-sky radiative setup that would push readings to 10°C or below. Conversely, the same winds and marine influence suppress daytime heat retention needed for a 20°C minimum. This narrow band of uncertainty, with limited model spread and no major synoptic shifts in the past 48 hours, underpins the near-even market odds between the extremes.
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