Recent National Weather Service guidance and ensemble models project a daily maximum near 76–80°F in Seattle on June 21, 2026, under a strengthening upper-level ridge that favors subsidence warming and reduced cloud cover. Onshore flow from the Pacific and the moderating influence of Puget Sound waters introduce uncertainty in the precise peak, keeping 78–79°F and 80–81°F bins closely matched in trader pricing. Seasonal context of above-average early-summer temperatures, with limited marine-layer intrusion expected, supports the current distribution while highlighting sensitivity to small shifts in wind direction or timing of any ridge axis passage.
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 June 21?
Highest temperature in Seattle on June 21?
76-77°F 100.0%
69°F or below <1%
70-71°F <1%
72-73°F <1%
$48,367 Vol.
$48,367 Vol.
Jun 21, 2026
69°F or below
No
70-71°F
No
72-73°F
No
74-75°F
No
76-77°F
Yes
78-79°F
No
80-81°F
No
82-83°F
No
84-85°F
No
86-87°F
No
88°F or higher
No
76-77°F 100.0%
69°F or below <1%
70-71°F <1%
72-73°F <1%
$48,367 Vol.
$48,367 Vol.
Jun 21, 2026
69°F or below
$5,416 Vol.
No
70-71°F
$3,478 Vol.
No
72-73°F
$2,947 Vol.
No
74-75°F
$5,351 Vol.
No
76-77°F
$6,328 Vol.
Yes
78-79°F
$11,738 Vol.
No
80-81°F
$6,514 Vol.
No
82-83°F
$3,351 Vol.
No
84-85°F
$1,600 Vol.
No
86-87°F
$1,426 Vol.
No
88°F or higher
$216 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 21 Jun '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.Recent National Weather Service guidance and ensemble models project a daily maximum near 76–80°F in Seattle on June 21, 2026, under a strengthening upper-level ridge that favors subsidence warming and reduced cloud cover. Onshore flow from the Pacific and the moderating influence of Puget Sound waters introduce uncertainty in the precise peak, keeping 78–79°F and 80–81°F bins closely matched in trader pricing. Seasonal context of above-average early-summer temperatures, with limited marine-layer intrusion expected, supports the current distribution while highlighting sensitivity to small shifts in wind direction or timing of any ridge axis passage.
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 21 Jun '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.
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: Jun 19, 2026, 9:03 PM ET
Volume
$48,367End Date
Jun 21, 2026Market Opened
Jun 19, 2026, 9:03 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 to the temperature range that contains the highest temperature recorded at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 21 Jun '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.Recent National Weather Service guidance and ensemble models project a daily maximum near 76–80°F in Seattle on June 21, 2026, under a strengthening upper-level ridge that favors subsidence warming and reduced cloud cover. Onshore flow from the Pacific and the moderating influence of Puget Sound waters introduce uncertainty in the precise peak, keeping 78–79°F and 80–81°F bins closely matched in trader pricing. Seasonal context of above-average early-summer temperatures, with limited marine-layer intrusion expected, supports the current distribution while highlighting sensitivity to small shifts in wind direction or timing of any ridge axis passage.
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 21 Jun '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.
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
$48,367End Date
Jun 21, 2026Market Opened
Jun 19, 2026, 9:03 PM ETResolution Source
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent National Weather Service guidance and ensemble models project a daily maximum near 76–80°F in Seattle on June 21, 2026, under a strengthening upper-level ridge that favors subsidence warming and reduced cloud cover. Onshore flow from the Pacific and the moderating influence of Puget Sound waters introduce uncertainty in the precise peak, keeping 78–79°F and 80–81°F bins closely matched in trader pricing. Seasonal context of above-average early-summer temperatures, with limited marine-layer intrusion expected, supports the current distribution while highlighting sensitivity to small shifts in wind direction or timing of any ridge axis passage.
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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