Latest National Weather Service forecasts and ensemble model consensus from GFS and ECMWF position Seattle's April 3 high temperature in the 56-57°F range (38.5% implied probability), reflecting a developing upper-level ridge over the Pacific Northwest that will reduce persistent marine stratus cloud cover responsible for capping recent March highs around 52-53°F amid zonal flow patterns. This shift from cooler-than-normal late March conditions—evidenced by Polymarket's resolution of March 26 at 52-53°F—drives trader sentiment toward moderate warming, with 54-55°F (26.5%) and 58-59°F (23.0%) as close contenders due to model spread on cloud persistence and light onshore flow. Historical April 3 average highs near 56°F align with this positioning; watch daily NWS updates and 00z/12z model runs for refinements as resolution nears.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Seattle on April 3?
Highest temperature in Seattle on April 3?
56-57°F 39%
54-55°F 27%
58-59°F 23%
52-53°F 12%
45°F or below
1%
46-47°F
5%
48-49°F
4%
50-51°F
5%
52-53°F
12%
54-55°F
27%
56-57°F
39%
58-59°F
23%
60-61°F
5%
62-63°F
7%
64°F or higher
7%
56-57°F 39%
54-55°F 27%
58-59°F 23%
52-53°F 12%
45°F or below
1%
46-47°F
5%
48-49°F
4%
50-51°F
5%
52-53°F
12%
54-55°F
27%
56-57°F
39%
58-59°F
23%
60-61°F
5%
62-63°F
7%
64°F or higher
7%
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, 2:26 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 National Weather Service forecasts and ensemble model consensus from GFS and ECMWF position Seattle's April 3 high temperature in the 56-57°F range (38.5% implied probability), reflecting a developing upper-level ridge over the Pacific Northwest that will reduce persistent marine stratus cloud cover responsible for capping recent March highs around 52-53°F amid zonal flow patterns. This shift from cooler-than-normal late March conditions—evidenced by Polymarket's resolution of March 26 at 52-53°F—drives trader sentiment toward moderate warming, with 54-55°F (26.5%) and 58-59°F (23.0%) as close contenders due to model spread on cloud persistence and light onshore flow. Historical April 3 average highs near 56°F align with this positioning; watch daily NWS updates and 00z/12z model runs for refinements as resolution nears.
Experimental AI-generated summary referencing Polymarket data · Updated

Beware of external links.
Beware of external links.
Frequently Asked Questions