Official measurements from the Japan Meteorological Agency confirm a daily maximum of 25.3°C at the Tokyo station on September 18, aligning with GFS model runs and other forecasts showing an afternoon peak near 25°C under mostly cloudy skies with light rain and northerly winds. This observed value, consistent across nearby sites and real-time monitoring, underpins the market's near-certain consensus on 25°C. Uncertainties such as post-hoc data revisions, station-specific microclimates, or differing resolution thresholds remain possible but improbable given the tight observational agreement and proximity to day's end.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Tokyo on September 18?
Highest temperature in Tokyo on September 18?
25°C 100.0%
19°C or below <1%
20°C <1%
21°C <1%
$56,348 Vol.
$56,348 Vol.
Sep 18, 2026
19°C or below
No
20°C
No
21°C
No
22°C
No
23°C
No
24°C
No
25°C
Yes
26°C
No
27°C
No
28°C
No
29°C or higher
No
25°C 100.0%
19°C or below <1%
20°C <1%
21°C <1%
$56,348 Vol.
$56,348 Vol.
Sep 18, 2026
19°C or below
$1,379 Vol.
No
20°C
$392 Vol.
No
21°C
$1,596 Vol.
No
22°C
$1,412 Vol.
No
23°C
$8,979 Vol.
No
24°C
$13,725 Vol.
No
25°C
$11,460 Vol.
Yes
26°C
$6,743 Vol.
No
27°C
$6,075 Vol.
No
28°C
$2,852 Vol.
No
29°C or higher
$1,735 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Tokyo Haneda Airport Station in degrees Celsius on 18 Sep '26.
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=rjtt
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.Official measurements from the Japan Meteorological Agency confirm a daily maximum of 25.3°C at the Tokyo station on September 18, aligning with GFS model runs and other forecasts showing an afternoon peak near 25°C under mostly cloudy skies with light rain and northerly winds. This observed value, consistent across nearby sites and real-time monitoring, underpins the market's near-certain consensus on 25°C. Uncertainties such as post-hoc data revisions, station-specific microclimates, or differing resolution thresholds remain possible but improbable given the tight observational agreement and proximity to day's end.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Tokyo Haneda Airport Station in degrees Celsius on 18 Sep '26.
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=rjtt
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.
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=rjtt
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 16, 2026, 12:56 AM ET
Volume
$56,348End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=rjttResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Tokyo Haneda Airport Station in degrees Celsius on 18 Sep '26.
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=rjtt
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.Official measurements from the Japan Meteorological Agency confirm a daily maximum of 25.3°C at the Tokyo station on September 18, aligning with GFS model runs and other forecasts showing an afternoon peak near 25°C under mostly cloudy skies with light rain and northerly winds. This observed value, consistent across nearby sites and real-time monitoring, underpins the market's near-certain consensus on 25°C. Uncertainties such as post-hoc data revisions, station-specific microclimates, or differing resolution thresholds remain possible but improbable given the tight observational agreement and proximity to day's end.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Tokyo Haneda Airport Station in degrees Celsius on 18 Sep '26.
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=rjtt
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.
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=rjtt
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.
Volume
$56,348End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=rjttResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official measurements from the Japan Meteorological Agency confirm a daily maximum of 25.3°C at the Tokyo station on September 18, aligning with GFS model runs and other forecasts showing an afternoon peak near 25°C under mostly cloudy skies with light rain and northerly winds. This observed value, consistent across nearby sites and real-time monitoring, underpins the market's near-certain consensus on 25°C. Uncertainties such as post-hoc data revisions, station-specific microclimates, or differing resolution thresholds remain possible but improbable given the tight observational agreement and proximity to day's end.
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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