Current National Weather Service forecasts place Seattle's peak temperature on August 18 in the mid-to-upper 70s, reflecting a moderate onshore flow and lingering marine layer that caps daytime heating under a weak Pacific high. The closely matched 76-77°F and 78-79°F outcomes stem from minor model differences in boundary-layer mixing, cloud timing, and dew-point depression, which control how much solar insolation reaches the surface before the sea breeze strengthens. Historical late-August climatology shows typical highs near 75–78°F, so traders weigh any updated runs from the NAM or ECMWF that could shift the maximum by 1–2°F. Resolution hinges on official Seattle-Tacoma Airport readings at 5 p.m. local time, where precise humidity and wind observations determine the final peak.
Resumo experimental gerado por IA com dados do Polymarket. Isto não é aconselhamento de trading e não tem qualquer papel na resolução deste mercado. · AtualizadoTemperatura mais alta em Seattle no dia 18 de agosto?
76-77°F 33%
78-79°F 29%
74-75°F 18%
80-81°F 12%
71°F or below
1%
72-73°F
4%
74-75°F
18%
76-77°F
33%
78-79°F
29%
80-81°F
12%
82-83°F
6%
84-85°F
1%
86-87°F
<1%
88-89°F
<1%
90°F or higher
<1%
76-77°F 33%
78-79°F 29%
74-75°F 18%
80-81°F 12%
71°F or below
1%
72-73°F
4%
74-75°F
18%
76-77°F
33%
78-79°F
29%
80-81°F
12%
82-83°F
6%
84-85°F
1%
86-87°F
<1%
88-89°F
<1%
90°F or higher
<1%
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 18 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.
Mercado Aberto: Aug 16, 2026, 9:56 PM ET
Fonte de resolução
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...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 18 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.
Fonte de resolução
https://www.wunderground.com/history/daily/us/wa/seatac/KSEAResolver
0x69c47De9D...Current National Weather Service forecasts place Seattle's peak temperature on August 18 in the mid-to-upper 70s, reflecting a moderate onshore flow and lingering marine layer that caps daytime heating under a weak Pacific high. The closely matched 76-77°F and 78-79°F outcomes stem from minor model differences in boundary-layer mixing, cloud timing, and dew-point depression, which control how much solar insolation reaches the surface before the sea breeze strengthens. Historical late-August climatology shows typical highs near 75–78°F, so traders weigh any updated runs from the NAM or ECMWF that could shift the maximum by 1–2°F. Resolution hinges on official Seattle-Tacoma Airport readings at 5 p.m. local time, where precise humidity and wind observations determine the final peak.
Resumo experimental gerado por IA com dados do Polymarket. Isto não é aconselhamento de trading e não tem qualquer papel na resolução deste mercado. · Atualizado

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