Traders have placed near-certain odds on Seattle reaching a high of at least 58°F on May 18, driven by the latest National Weather Service forecast from the Seattle office projecting sunny skies and daytime temperatures in the mid-60s under a stable high-pressure ridge. Recent runs of the Global Forecast System and European models show minimal cloud cover and southerly flow that should allow rapid daytime warming across the Puget Sound region. This aligns with typical mid-May climatology for Sea-Tac Airport, where afternoon highs average near 64°F. Resolution depends on the official maximum temperature reading at that station, so only an abrupt late-day marine intrusion or unforecasted stratus would realistically pull the high below the dominant threshold before markets close.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Seattle on May 18?
Highest temperature in Seattle on May 18?
58°F or higher 99.8%
56-57°F <1%
46-47°F <1%
48-49°F <1%
NEW
$13,072 Vol.
NEW
$13,072 Vol.
May 18, 2026
39°F or below
<1%
40-41°F
<1%
42-43°F
<1%
44-45°F
<1%
46-47°F
<1%
48-49°F
<1%
50-51°F
<1%
52-53°F
<1%
54-55°F
<1%
56-57°F
<1%
58°F or higher
100%
58°F or higher 99.8%
56-57°F <1%
46-47°F <1%
48-49°F <1%
NEW
$13,072 Vol.
NEW
$13,072 Vol.
May 18, 2026
39°F or below
$1,974 Vol.
<1%
40-41°F
$1,192 Vol.
<1%
42-43°F
$986 Vol.
<1%
44-45°F
$856 Vol.
<1%
46-47°F
$944 Vol.
<1%
48-49°F
$864 Vol.
<1%
50-51°F
$796 Vol.
<1%
52-53°F
$1,216 Vol.
<1%
54-55°F
$1,202 Vol.
<1%
56-57°F
$1,478 Vol.
<1%
58°F or higher
$1,564 Vol.
100%
This market will resolve to the temperature range that contains the highest temperature recorded at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 18 May '26.
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 Seattle-Tacoma International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/wa/seatac/KSEA.
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 Fahrenheit (eg, 21°F). 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.Traders have placed near-certain odds on Seattle reaching a high of at least 58°F on May 18, driven by the latest National Weather Service forecast from the Seattle office projecting sunny skies and daytime temperatures in the mid-60s under a stable high-pressure ridge. Recent runs of the Global Forecast System and European models show minimal cloud cover and southerly flow that should allow rapid daytime warming across the Puget Sound region. This aligns with typical mid-May climatology for Sea-Tac Airport, where afternoon highs average near 64°F. Resolution depends on the official maximum temperature reading at that station, so only an abrupt late-day marine intrusion or unforecasted stratus would realistically pull the high below the dominant threshold before markets close.
This market will resolve to the temperature range that contains the highest temperature recorded at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 18 May '26.
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 Seattle-Tacoma International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/wa/seatac/KSEA.
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 Fahrenheit (eg, 21°F). 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.
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 Seattle-Tacoma International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/wa/seatac/KSEA.
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 Fahrenheit (eg, 21°F). 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 16, 2026, 12:03 AM ET
Volume
$13,072End Date
May 18, 2026Market Opened
May 16, 2026, 12:03 AM ETResolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAThis market will resolve to the temperature range that contains the highest temperature recorded at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 18 May '26.
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 Seattle-Tacoma International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/wa/seatac/KSEA.
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 Fahrenheit (eg, 21°F). 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.Traders have placed near-certain odds on Seattle reaching a high of at least 58°F on May 18, driven by the latest National Weather Service forecast from the Seattle office projecting sunny skies and daytime temperatures in the mid-60s under a stable high-pressure ridge. Recent runs of the Global Forecast System and European models show minimal cloud cover and southerly flow that should allow rapid daytime warming across the Puget Sound region. This aligns with typical mid-May climatology for Sea-Tac Airport, where afternoon highs average near 64°F. Resolution depends on the official maximum temperature reading at that station, so only an abrupt late-day marine intrusion or unforecasted stratus would realistically pull the high below the dominant threshold before markets close.
This market will resolve to the temperature range that contains the highest temperature recorded at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 18 May '26.
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 Seattle-Tacoma International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/wa/seatac/KSEA.
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 Fahrenheit (eg, 21°F). 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.
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 Seattle-Tacoma International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/wa/seatac/KSEA.
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 Fahrenheit (eg, 21°F). 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.
Volume
$13,072End Date
May 18, 2026Market Opened
May 16, 2026, 12:03 AM ETResolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEATraders have placed near-certain odds on Seattle reaching a high of at least 58°F on May 18, driven by the latest National Weather Service forecast from the Seattle office projecting sunny skies and daytime temperatures in the mid-60s under a stable high-pressure ridge. Recent runs of the Global Forecast System and European models show minimal cloud cover and southerly flow that should allow rapid daytime warming across the Puget Sound region. This aligns with typical mid-May climatology for Sea-Tac Airport, where afternoon highs average near 64°F. Resolution depends on the official maximum temperature reading at that station, so only an abrupt late-day marine intrusion or unforecasted stratus would realistically pull the high below the dominant threshold before markets close.
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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