Official observations from the National Weather Service's automated surface observing system (ASOS) at Seattle-Tacoma International Airport (KSEA)—the market's authoritative data source—confirm a high temperature exceeding 62°F on April 20, 2026, solidifying 100% trader consensus on that outcome amid negligible 0.1% odds for 60-61°F. This reflects the persistence of a strong upper-level ridge over the Pacific Northwest, delivering clear skies, light winds, and well above-normal warmth following 74°F on April 19, far surpassing the late-April climatological average of around 60°F. Model consensus from NOAA's Global Forecast System (GFS) and High-Resolution Rapid Refresh (HRRR) had anticipated this mild pattern with highs in the 70s. Post-event, only an unprecedented data revision from preliminary METAR reports to the final climatological summary could challenge resolution, a scenario deemed implausible given consistent hourly readings.
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 April 20?
Highest temperature in Seattle on April 20?
62°F or higher 100.0%
43°F or below <1%
44-45°F <1%
46-47°F <1%
$69,954 Vol.
$69,954 Vol.
Apr 20, 2026
43°F or below
No
44-45°F
No
46-47°F
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
No
56-57°F
No
58-59°F
No
60-61°F
No
62°F or higher
Yes
62°F or higher 100.0%
43°F or below <1%
44-45°F <1%
46-47°F <1%
$69,954 Vol.
$69,954 Vol.
Apr 20, 2026
43°F or below
$5,152 Vol.
No
44-45°F
$3,942 Vol.
No
46-47°F
$3,065 Vol.
No
48-49°F
$3,012 Vol.
No
50-51°F
$3,025 Vol.
No
52-53°F
$4,462 Vol.
No
54-55°F
$3,376 Vol.
No
56-57°F
$4,619 Vol.
No
58-59°F
$14,592 Vol.
No
60-61°F
$5,413 Vol.
No
62°F or higher
$19,295 Vol.
Yes
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 20 Apr '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.Official observations from the National Weather Service's automated surface observing system (ASOS) at Seattle-Tacoma International Airport (KSEA)—the market's authoritative data source—confirm a high temperature exceeding 62°F on April 20, 2026, solidifying 100% trader consensus on that outcome amid negligible 0.1% odds for 60-61°F. This reflects the persistence of a strong upper-level ridge over the Pacific Northwest, delivering clear skies, light winds, and well above-normal warmth following 74°F on April 19, far surpassing the late-April climatological average of around 60°F. Model consensus from NOAA's Global Forecast System (GFS) and High-Resolution Rapid Refresh (HRRR) had anticipated this mild pattern with highs in the 70s. Post-event, only an unprecedented data revision from preliminary METAR reports to the final climatological summary could challenge resolution, a scenario deemed implausible given consistent hourly readings.
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 20 Apr '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: Apr 18, 2026, 12:31 AM ET
Volume
$69,954End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:31 AM ETResolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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 20 Apr '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.Official observations from the National Weather Service's automated surface observing system (ASOS) at Seattle-Tacoma International Airport (KSEA)—the market's authoritative data source—confirm a high temperature exceeding 62°F on April 20, 2026, solidifying 100% trader consensus on that outcome amid negligible 0.1% odds for 60-61°F. This reflects the persistence of a strong upper-level ridge over the Pacific Northwest, delivering clear skies, light winds, and well above-normal warmth following 74°F on April 19, far surpassing the late-April climatological average of around 60°F. Model consensus from NOAA's Global Forecast System (GFS) and High-Resolution Rapid Refresh (HRRR) had anticipated this mild pattern with highs in the 70s. Post-event, only an unprecedented data revision from preliminary METAR reports to the final climatological summary could challenge resolution, a scenario deemed implausible given consistent hourly readings.
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 20 Apr '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
$69,954End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:31 AM ETResolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from the National Weather Service's automated surface observing system (ASOS) at Seattle-Tacoma International Airport (KSEA)—the market's authoritative data source—confirm a high temperature exceeding 62°F on April 20, 2026, solidifying 100% trader consensus on that outcome amid negligible 0.1% odds for 60-61°F. This reflects the persistence of a strong upper-level ridge over the Pacific Northwest, delivering clear skies, light winds, and well above-normal warmth following 74°F on April 19, far surpassing the late-April climatological average of around 60°F. Model consensus from NOAA's Global Forecast System (GFS) and High-Resolution Rapid Refresh (HRRR) had anticipated this mild pattern with highs in the 70s. Post-event, only an unprecedented data revision from preliminary METAR reports to the final climatological summary could challenge resolution, a scenario deemed implausible given consistent hourly readings.
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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