Recent ensemble guidance from global models shows Jeddah’s May 19 maximum likely falling between 40–42 °C under persistent subtropical high pressure, yet modest differences in Red Sea moisture advection and onshore flow strength create the tight clustering around 40–42 °C outcomes. Coastal humidity and light northerly winds can suppress afternoon heating by 1–2 °C relative to drier continental air masses that have already produced 41 °C readings earlier in May. Historical May maxima average in the upper 30s °C with occasional excursions above 40 °C when high-pressure reinforcement limits cloud cover; updated National Center for Meteorology and ECMWF runs expected over the next 48 hours will clarify whether peak wind speeds or dew-point trends shift the most probable outcome.
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 May 19?
42°C 22%
41°C 18%
43°C 16%
40°C 15%
34°C or below
1%
35°C
1%
36°C
1%
37°C
3%
38°C
5%
39°C
6%
40°C
15%
41°C
18%
42°C
22%
43°C
20%
44°C or higher
15%
42°C 22%
41°C 18%
43°C 16%
40°C 15%
34°C or below
1%
35°C
1%
36°C
1%
37°C
3%
38°C
5%
39°C
6%
40°C
15%
41°C
18%
42°C
22%
43°C
20%
44°C or higher
15%
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: May 17, 2026, 12:06 AM ET
Resolution Source
https://www.wunderground.com/history/daily/sa/jeddah/OEJNThe 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/OEJNRecent ensemble guidance from global models shows Jeddah’s May 19 maximum likely falling between 40–42 °C under persistent subtropical high pressure, yet modest differences in Red Sea moisture advection and onshore flow strength create the tight clustering around 40–42 °C outcomes. Coastal humidity and light northerly winds can suppress afternoon heating by 1–2 °C relative to drier continental air masses that have already produced 41 °C readings earlier in May. Historical May maxima average in the upper 30s °C with occasional excursions above 40 °C when high-pressure reinforcement limits cloud cover; updated National Center for Meteorology and ECMWF runs expected over the next 48 hours will clarify whether peak wind speeds or dew-point trends shift the most probable outcome.
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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