Recent official forecasts for Jeddah on September 18 point to a daytime high near 36–38°C under mostly sunny skies, aligning with the closely matched market odds for those outcomes. Persistent high pressure and subsidence over the Red Sea coast sustain strong solar heating, while light westerly winds and moderate humidity (around 50–65%) limit cooling. Model consensus shows minimal cloud cover or precipitation risk, consistent with September climatology where average highs reach 35–36°C. Slight differences among leading probabilities reflect uncertainty in exact peak timing, local sea-breeze effects, and minor model variations in boundary-layer mixing. Updated runs from agencies like the Saudi Meteorological Authority and global ensembles over the next 48 hours will refine resolution criteria for the official maximum reading.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Jeddah on September 18?
Highest temperature in Jeddah on September 18?
38°C 31%
37°C 29%
36°C 24%
39°C or higher 21%
NEW
NEW
Sep 18, 2026
29°C or below
<1%
30°C
1%
31°C
1%
32°C
1%
33°C
4%
34°C
3%
35°C
11%
36°C
24%
37°C
29%
38°C
21%
39°C or higher
21%
38°C 31%
37°C 29%
36°C 24%
39°C or higher 21%
NEW
NEW
Sep 18, 2026
29°C or below
$305 Vol.
<1%
30°C
$225 Vol.
1%
31°C
$225 Vol.
1%
32°C
$116 Vol.
1%
33°C
$0 Vol.
4%
34°C
$0 Vol.
3%
35°C
$5 Vol.
11%
36°C
$5 Vol.
24%
37°C
$10 Vol.
29%
38°C
$5 Vol.
21%
39°C or higher
$12 Vol.
21%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the King Abdulaziz International Airport Station in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=oejn
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.Recent official forecasts for Jeddah on September 18 point to a daytime high near 36–38°C under mostly sunny skies, aligning with the closely matched market odds for those outcomes. Persistent high pressure and subsidence over the Red Sea coast sustain strong solar heating, while light westerly winds and moderate humidity (around 50–65%) limit cooling. Model consensus shows minimal cloud cover or precipitation risk, consistent with September climatology where average highs reach 35–36°C. Slight differences among leading probabilities reflect uncertainty in exact peak timing, local sea-breeze effects, and minor model variations in boundary-layer mixing. Updated runs from agencies like the Saudi Meteorological Authority and global ensembles over the next 48 hours will refine resolution criteria for the official maximum reading.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the King Abdulaziz International Airport Station in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=oejn
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 highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=oejn
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 16, 2026, 12:58 AM ET
Volume
$909End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=oejnResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the King Abdulaziz International Airport Station in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=oejn
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.Recent official forecasts for Jeddah on September 18 point to a daytime high near 36–38°C under mostly sunny skies, aligning with the closely matched market odds for those outcomes. Persistent high pressure and subsidence over the Red Sea coast sustain strong solar heating, while light westerly winds and moderate humidity (around 50–65%) limit cooling. Model consensus shows minimal cloud cover or precipitation risk, consistent with September climatology where average highs reach 35–36°C. Slight differences among leading probabilities reflect uncertainty in exact peak timing, local sea-breeze effects, and minor model variations in boundary-layer mixing. Updated runs from agencies like the Saudi Meteorological Authority and global ensembles over the next 48 hours will refine resolution criteria for the official maximum reading.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the King Abdulaziz International Airport Station in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=oejn
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 highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=oejn
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
$909End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=oejnResolver
0x69c47De9D...Recent official forecasts for Jeddah on September 18 point to a daytime high near 36–38°C under mostly sunny skies, aligning with the closely matched market odds for those outcomes. Persistent high pressure and subsidence over the Red Sea coast sustain strong solar heating, while light westerly winds and moderate humidity (around 50–65%) limit cooling. Model consensus shows minimal cloud cover or precipitation risk, consistent with September climatology where average highs reach 35–36°C. Slight differences among leading probabilities reflect uncertainty in exact peak timing, local sea-breeze effects, and minor model variations in boundary-layer mixing. Updated runs from agencies like the Saudi Meteorological Authority and global ensembles over the next 48 hours will refine resolution criteria for the official maximum reading.
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