Latest NOAA GFS and ECMWF ensemble forecasts center Seattle-Tacoma International Airport (KSEA) highs on April 4 around 58-62°F, reflecting trader-implied probabilities clustered tightly across 58-63°F outcomes amid inherent short-range uncertainty in Pacific Northwest spring weather. Key differentiators include the persistence of marine stratus clouds from cool Pacific inflow, which caps daytime heating in cooler scenarios (58-59°F), versus potential diurnal clearing and southerly winds allowing greater solar insolation for warmer readings (62-63°F). Historical April averages hover near 57°F, with model spread capturing stable boundary layer conditions and weak upper-level ridging. Watch for National Weather Service updates and fresh model runs every 12 hours through resolution.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Seattle on April 4?
Highest temperature in Seattle on April 4?
60-61°F 32%
58-59°F 31%
62-63°F 27%
64-65°F 9%
49°F or below
1%
50-51°F
1%
52-53°F
1%
54-55°F
2%
56-57°F
7%
58-59°F
31%
60-61°F
32%
62-63°F
27%
64-65°F
9%
66-67°F
4%
68°F or higher
1%
60-61°F 32%
58-59°F 31%
62-63°F 27%
64-65°F 9%
49°F or below
1%
50-51°F
1%
52-53°F
1%
54-55°F
2%
56-57°F
7%
58-59°F
31%
60-61°F
32%
62-63°F
27%
64-65°F
9%
66-67°F
4%
68°F 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 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: Mar 29, 2026, 3:15 PM ET
Resolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
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 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.
Resolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Latest NOAA GFS and ECMWF ensemble forecasts center Seattle-Tacoma International Airport (KSEA) highs on April 4 around 58-62°F, reflecting trader-implied probabilities clustered tightly across 58-63°F outcomes amid inherent short-range uncertainty in Pacific Northwest spring weather. Key differentiators include the persistence of marine stratus clouds from cool Pacific inflow, which caps daytime heating in cooler scenarios (58-59°F), versus potential diurnal clearing and southerly winds allowing greater solar insolation for warmer readings (62-63°F). Historical April averages hover near 57°F, with model spread capturing stable boundary layer conditions and weak upper-level ridging. Watch for National Weather Service updates and fresh model runs every 12 hours through resolution.
Experimental AI-generated summary referencing Polymarket data · Updated
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