Recent forecasts from multiple models indicate a high near 26–27°C for Busan on September 17, driven by persistent northeasterly winds of 15–20 km/h, increasing cloud cover, and moderate humidity levels around 50–60% that limit daytime heating. This setup produces the tight market split between 27°C and 28°C, as small differences in afternoon insolation or boundary-layer mixing can shift the peak by 1°C. Historical September averages hover near 26°C, with current runs showing limited potential for stronger warming absent clearer skies or reduced wind. Updated model guidance expected in the next 24–48 hours will clarify resolution criteria around the daily maximum.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Busan on September 17?
27°C 49%
28°C 45%
26°C 7%
25°C 4%
22°C or below
<1%
23°C
3%
24°C
3%
25°C
4%
26°C
7%
27°C
49%
28°C
45%
29°C
4%
30°C
2%
31°C
1%
32°C or higher
<1%
27°C 49%
28°C 45%
26°C 7%
25°C 4%
22°C or below
<1%
23°C
3%
24°C
3%
25°C
4%
26°C
7%
27°C
49%
28°C
45%
29°C
4%
30°C
2%
31°C
1%
32°C or higher
<1%
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=rkpk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). 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: Sep 15, 2026, 12:58 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=rkpkResolver
0x69c47De9D...The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=rkpk
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). 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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=rkpkResolver
0x69c47De9D...Recent forecasts from multiple models indicate a high near 26–27°C for Busan on September 17, driven by persistent northeasterly winds of 15–20 km/h, increasing cloud cover, and moderate humidity levels around 50–60% that limit daytime heating. This setup produces the tight market split between 27°C and 28°C, as small differences in afternoon insolation or boundary-layer mixing can shift the peak by 1°C. Historical September averages hover near 26°C, with current runs showing limited potential for stronger warming absent clearer skies or reduced wind. Updated model guidance expected in the next 24–48 hours will clarify resolution criteria around the daily maximum.
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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