National Weather Service observations at Seattle-Tacoma International Airport (KSEA), the official measurement site for this market, recorded a maximum temperature of 55°F on April 28, 2026, locking in the 54-55°F outcome at 100% trader consensus. This aligns with a persistent cool marine air mass and extensive low cloud cover driven by onshore flow from the Pacific, as forecasted by NOAA models like GFS and ECMWF in the preceding 24-48 hours, which converged on highs in the mid-50s amid typical springtime Puget Sound stratocumulus decks. Seattle's April climatology averages 58°F highs, but this pattern echoes historical cool spells from similar pressure gradients. Post-observation data revisions are exceedingly rare for ASOS stations, though a verified instrument recalibration could theoretically challenge resolution.
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 28?
Highest temperature in Seattle on April 28?
54-55°F 100.0%
51°F or below <1%
52-53°F <1%
56-57°F <1%
$75,735 Vol.
$75,735 Vol.
Apr 28, 2026
51°F or below
No
52-53°F
No
54-55°F
Yes
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
No
64-65°F
No
66-67°F
No
68-69°F
No
70°F or higher
No
54-55°F 100.0%
51°F or below <1%
52-53°F <1%
56-57°F <1%
$75,735 Vol.
$75,735 Vol.
Apr 28, 2026
51°F or below
$4,269 Vol.
No
52-53°F
$3,839 Vol.
No
54-55°F
$12,357 Vol.
Yes
56-57°F
$6,999 Vol.
No
58-59°F
$9,203 Vol.
No
60-61°F
$24,071 Vol.
No
62-63°F
$3,323 Vol.
No
64-65°F
$3,434 Vol.
No
66-67°F
$1,590 Vol.
No
68-69°F
$3,108 Vol.
No
70°F or higher
$3,541 Vol.
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 28 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.National Weather Service observations at Seattle-Tacoma International Airport (KSEA), the official measurement site for this market, recorded a maximum temperature of 55°F on April 28, 2026, locking in the 54-55°F outcome at 100% trader consensus. This aligns with a persistent cool marine air mass and extensive low cloud cover driven by onshore flow from the Pacific, as forecasted by NOAA models like GFS and ECMWF in the preceding 24-48 hours, which converged on highs in the mid-50s amid typical springtime Puget Sound stratocumulus decks. Seattle's April climatology averages 58°F highs, but this pattern echoes historical cool spells from similar pressure gradients. Post-observation data revisions are exceedingly rare for ASOS stations, though a verified instrument recalibration could theoretically challenge resolution.
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 28 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 26, 2026, 12:13 AM ET
Volume
$75,735End Date
Apr 28, 2026Market Opened
Apr 26, 2026, 12:13 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 28 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.National Weather Service observations at Seattle-Tacoma International Airport (KSEA), the official measurement site for this market, recorded a maximum temperature of 55°F on April 28, 2026, locking in the 54-55°F outcome at 100% trader consensus. This aligns with a persistent cool marine air mass and extensive low cloud cover driven by onshore flow from the Pacific, as forecasted by NOAA models like GFS and ECMWF in the preceding 24-48 hours, which converged on highs in the mid-50s amid typical springtime Puget Sound stratocumulus decks. Seattle's April climatology averages 58°F highs, but this pattern echoes historical cool spells from similar pressure gradients. Post-observation data revisions are exceedingly rare for ASOS stations, though a verified instrument recalibration could theoretically challenge resolution.
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 28 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
$75,735End Date
Apr 28, 2026Market Opened
Apr 26, 2026, 12:13 AM ETResolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
National Weather Service observations at Seattle-Tacoma International Airport (KSEA), the official measurement site for this market, recorded a maximum temperature of 55°F on April 28, 2026, locking in the 54-55°F outcome at 100% trader consensus. This aligns with a persistent cool marine air mass and extensive low cloud cover driven by onshore flow from the Pacific, as forecasted by NOAA models like GFS and ECMWF in the preceding 24-48 hours, which converged on highs in the mid-50s amid typical springtime Puget Sound stratocumulus decks. Seattle's April climatology averages 58°F highs, but this pattern echoes historical cool spells from similar pressure gradients. Post-observation data revisions are exceedingly rare for ASOS stations, though a verified instrument recalibration could theoretically challenge 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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