Traders see nearly even odds between a minimum of 25°C or below and 35°C or higher in Jeddah on September 18 because short-range forecast models show high uncertainty in overnight cooling. Coastal location on the Red Sea creates strong diurnal moderation, with sea surface temperatures near 32°C limiting how far the air mass can drop, while steering patterns from subtropical highs versus any passing troughs determine whether calm conditions allow radiative cooling or persistent onshore flow keeps readings elevated. Historical September minima average 28–30°C, so outcomes hinge on whether a slightly cooler northerly flow arrives or heat remains trapped under clear skies. Updated model runs from regional meteorological centers over the next 48 hours will likely sharpen the range before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Jeddah on September 18?
Lowest temperature in Jeddah on September 18?
25°C or below 83%
35°C or higher 83%
31°C 49%
30°C 40%
NEW
NEW
Sep 18, 2026
25°C or below
83%
26°C
38%
27°C
38%
28°C
38%
29°C
38%
30°C
29%
31°C
27%
32°C
38%
33°C
21%
34°C
38%
35°C or higher
83%
25°C or below 83%
35°C or higher 83%
31°C 49%
30°C 40%
NEW
NEW
Sep 18, 2026
25°C or below
$0 Vol.
83%
26°C
$0 Vol.
38%
27°C
$0 Vol.
38%
28°C
$0 Vol.
38%
29°C
$0 Vol.
38%
30°C
$5 Vol.
29%
31°C
$18 Vol.
27%
32°C
$0 Vol.
38%
33°C
$0 Vol.
21%
34°C
$0 Vol.
38%
35°C or higher
$0 Vol.
83%
This market will resolve to the temperature range that contains the lowest 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 lowest 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.Traders see nearly even odds between a minimum of 25°C or below and 35°C or higher in Jeddah on September 18 because short-range forecast models show high uncertainty in overnight cooling. Coastal location on the Red Sea creates strong diurnal moderation, with sea surface temperatures near 32°C limiting how far the air mass can drop, while steering patterns from subtropical highs versus any passing troughs determine whether calm conditions allow radiative cooling or persistent onshore flow keeps readings elevated. Historical September minima average 28–30°C, so outcomes hinge on whether a slightly cooler northerly flow arrives or heat remains trapped under clear skies. Updated model runs from regional meteorological centers over the next 48 hours will likely sharpen the range before resolution.
This market will resolve to the temperature range that contains the lowest 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 lowest 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 lowest 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, 12:31 AM ET
Volume
$23End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:31 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=oejnResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest 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 lowest 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.Traders see nearly even odds between a minimum of 25°C or below and 35°C or higher in Jeddah on September 18 because short-range forecast models show high uncertainty in overnight cooling. Coastal location on the Red Sea creates strong diurnal moderation, with sea surface temperatures near 32°C limiting how far the air mass can drop, while steering patterns from subtropical highs versus any passing troughs determine whether calm conditions allow radiative cooling or persistent onshore flow keeps readings elevated. Historical September minima average 28–30°C, so outcomes hinge on whether a slightly cooler northerly flow arrives or heat remains trapped under clear skies. Updated model runs from regional meteorological centers over the next 48 hours will likely sharpen the range before resolution.
This market will resolve to the temperature range that contains the lowest 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 lowest 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 lowest 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
$23End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:31 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=oejnResolver
0x69c47De9D...Traders see nearly even odds between a minimum of 25°C or below and 35°C or higher in Jeddah on September 18 because short-range forecast models show high uncertainty in overnight cooling. Coastal location on the Red Sea creates strong diurnal moderation, with sea surface temperatures near 32°C limiting how far the air mass can drop, while steering patterns from subtropical highs versus any passing troughs determine whether calm conditions allow radiative cooling or persistent onshore flow keeps readings elevated. Historical September minima average 28–30°C, so outcomes hinge on whether a slightly cooler northerly flow arrives or heat remains trapped under clear skies. Updated model runs from regional meteorological centers over the next 48 hours will likely sharpen the range before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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