Trader consensus on Polymarket overwhelmingly favors a highest temperature of 41°C in Jeddah on April 18 (99.7% implied probability), reflecting strong alignment across global forecast models like GFS and ECMWF, which project peak heating under a persistent subtropical high-pressure ridge promoting subsidence and clear skies. Current observations from King Abdulaziz International Airport (OEJN METARs) show temperatures climbing into the mid-30s°C amid low humidity (around 20-40%) and light winds, consistent with radiative warming amplified by the region's arid spring climatology—April averages 34-35°C but routinely hits 40°C+ during heat domes. Saudi National Center of Meteorology guidance supports this, with no convective threats. Realistic challenges include an unexpected intensification of Red Sea sea breezes introducing clouds or a dust plume reducing insolation, potentially capping highs at 40°C; final hourly data releases later today will confirm resolution based on official airport measurements.
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 April 18?
Highest temperature in Jeddah on April 18?
41°C 99.8%
42°C <1%
43°C or higher <1%
$31,228 Vol.
$31,228 Vol.
41°C
100%
42°C
<1%
43°C or higher
<1%
41°C 99.8%
42°C <1%
43°C or higher <1%
$31,228 Vol.
$31,228 Vol.
41°C
100%
42°C
<1%
43°C or higher
<1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the King Abdulaziz International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/sa/jeddah/OEJN.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 16, 2026, 12:28 AM ET
Resolution Source
https://www.wunderground.com/history/daily/sa/jeddah/OEJNResolver
0x69c47De9D...The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the King Abdulaziz International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/sa/jeddah/OEJN.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Resolution Source
https://www.wunderground.com/history/daily/sa/jeddah/OEJNResolver
0x69c47De9D...Trader consensus on Polymarket overwhelmingly favors a highest temperature of 41°C in Jeddah on April 18 (99.7% implied probability), reflecting strong alignment across global forecast models like GFS and ECMWF, which project peak heating under a persistent subtropical high-pressure ridge promoting subsidence and clear skies. Current observations from King Abdulaziz International Airport (OEJN METARs) show temperatures climbing into the mid-30s°C amid low humidity (around 20-40%) and light winds, consistent with radiative warming amplified by the region's arid spring climatology—April averages 34-35°C but routinely hits 40°C+ during heat domes. Saudi National Center of Meteorology guidance supports this, with no convective threats. Realistic challenges include an unexpected intensification of Red Sea sea breezes introducing clouds or a dust plume reducing insolation, potentially capping highs at 40°C; final hourly data releases later today will confirm resolution based on official airport measurements.
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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