Trader consensus on Polymarket heavily favors a Seattle high of 56-57°F (32.5% implied probability) for March 28, driven by the National Weather Service's latest forecast pinpointing 55-57°F amid a weak upper-level ridge fostering mild conditions. Differentiating the close contenders—54-55°F (24.5%) and 58-59°F (24.5%)—are uncertainties in coastal marine layer persistence and afternoon cloud clearance, per ensemble model spreads from GFS and ECMWF showing 2-3°F divergence. Historical March averages hover near 55°F at Seattle-Tacoma International Airport, with current southerly flow limiting extremes; watch tomorrow's 12z model runs for resolution shifts as diurnal heating amplifies small forecast tweaks.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Seattle on March 28?
Highest temperature in Seattle on March 28?
56-57°F 33%
54-55°F 29%
58-59°F 27%
52-53°F 15%
51°F or below
3%
52-53°F
9%
54-55°F
25%
56-57°F
33%
58-59°F
25%
60-61°F
8%
62-63°F
4%
64-65°F
5%
66-67°F
5%
68-69°F
2%
70°F or higher
1%
56-57°F 33%
54-55°F 29%
58-59°F 27%
52-53°F 15%
51°F or below
3%
52-53°F
9%
54-55°F
25%
56-57°F
33%
58-59°F
25%
60-61°F
8%
62-63°F
4%
64-65°F
5%
66-67°F
5%
68-69°F
2%
70°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 24, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Trader consensus on Polymarket heavily favors a Seattle high of 56-57°F (32.5% implied probability) for March 28, driven by the National Weather Service's latest forecast pinpointing 55-57°F amid a weak upper-level ridge fostering mild conditions. Differentiating the close contenders—54-55°F (24.5%) and 58-59°F (24.5%)—are uncertainties in coastal marine layer persistence and afternoon cloud clearance, per ensemble model spreads from GFS and ECMWF showing 2-3°F divergence. Historical March averages hover near 55°F at Seattle-Tacoma International Airport, with current southerly flow limiting extremes; watch tomorrow's 12z model runs for resolution shifts as diurnal heating amplifies small forecast tweaks.
Experimental AI-generated summary referencing Polymarket data · Updated
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