Trader consensus has converged fully on the 78-79°F outcome for Seattle’s August 17 high because National Weather Service and model guidance, combined with Sea-Tac climatology, consistently pointed to that narrow band. Mid-August normals at the official station sit near 77°F, yet 2026’s warmer-than-average summer—driven by persistent ridging and above-normal sea-surface temperatures—shifted the expected peak upward by 1–2°F. Official forecasts released in the days prior centered on 77–79°F under partly cloudy skies with light northwest flow, limiting both upward spikes from downslope warming and cooling from marine influence. With the observation period now complete, the measured high aligned precisely with this range, eliminating realistic pathways for deviation such as unforecasted cloud cover or advection shifts.
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 August 17?
Highest temperature in Seattle on August 17?
78-79°F 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$42,502 Vol.
$42,502 Vol.
Aug 17, 2026
71°F or below
No
72-73°F
No
74-75°F
No
76-77°F
No
78-79°F
Yes
80-81°F
No
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
No
90°F or higher
No
78-79°F 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$42,502 Vol.
$42,502 Vol.
Aug 17, 2026
71°F or below
$7,827 Vol.
No
72-73°F
$2,485 Vol.
No
74-75°F
$4,566 Vol.
No
76-77°F
$11,458 Vol.
No
78-79°F
$5,555 Vol.
Yes
80-81°F
$4,261 Vol.
No
82-83°F
$2,656 Vol.
No
84-85°F
$1,583 Vol.
No
86-87°F
$1,034 Vol.
No
88-89°F
$416 Vol.
No
90°F or higher
$662 Vol.
No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 17 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Seattle-Tacoma International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Trader consensus has converged fully on the 78-79°F outcome for Seattle’s August 17 high because National Weather Service and model guidance, combined with Sea-Tac climatology, consistently pointed to that narrow band. Mid-August normals at the official station sit near 77°F, yet 2026’s warmer-than-average summer—driven by persistent ridging and above-normal sea-surface temperatures—shifted the expected peak upward by 1–2°F. Official forecasts released in the days prior centered on 77–79°F under partly cloudy skies with light northwest flow, limiting both upward spikes from downslope warming and cooling from marine influence. With the observation period now complete, the measured high aligned precisely with this range, eliminating realistic pathways for deviation such as unforecasted cloud cover or advection shifts.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 17 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Seattle-Tacoma International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
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 17 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Seattle-Tacoma International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Aug 15, 2026, 9:56 PM ET
Volume
$42,502End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 9:56 PM 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 based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 17 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Seattle-Tacoma International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Trader consensus has converged fully on the 78-79°F outcome for Seattle’s August 17 high because National Weather Service and model guidance, combined with Sea-Tac climatology, consistently pointed to that narrow band. Mid-August normals at the official station sit near 77°F, yet 2026’s warmer-than-average summer—driven by persistent ridging and above-normal sea-surface temperatures—shifted the expected peak upward by 1–2°F. Official forecasts released in the days prior centered on 77–79°F under partly cloudy skies with light northwest flow, limiting both upward spikes from downslope warming and cooling from marine influence. With the observation period now complete, the measured high aligned precisely with this range, eliminating realistic pathways for deviation such as unforecasted cloud cover or advection shifts.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 17 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Seattle-Tacoma International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
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 17 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Seattle-Tacoma International Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$42,502End Date
Aug 17, 2026Market Opened
Aug 15, 2026, 9:56 PM ETResolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Trader consensus has converged fully on the 78-79°F outcome for Seattle’s August 17 high because National Weather Service and model guidance, combined with Sea-Tac climatology, consistently pointed to that narrow band. Mid-August normals at the official station sit near 77°F, yet 2026’s warmer-than-average summer—driven by persistent ridging and above-normal sea-surface temperatures—shifted the expected peak upward by 1–2°F. Official forecasts released in the days prior centered on 77–79°F under partly cloudy skies with light northwest flow, limiting both upward spikes from downslope warming and cooling from marine influence. With the observation period now complete, the measured high aligned precisely with this range, eliminating realistic pathways for deviation such as unforecasted cloud cover or advection shifts.
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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