Recent forecasts from the Japan Meteorological Agency and ensemble models indicate mostly cloudy conditions with light northerly winds and a chance of drizzle or scattered showers for Tokyo on September 18, limiting solar heating and keeping afternoon maxima near 23–25 °C. Persistent cloud cover from a nearby frontal system and higher humidity reduce the diurnal temperature range compared with seasonal normals of 26–27 °C, while modest northerly flow advects slightly cooler maritime air. Small differences among leading outcomes hinge on the precise timing and coverage of any showers, boundary-layer mixing depth, and shortwave radiative flux under variable stratiform clouds; later model runs or updated JMA guidance could shift the peak by 1 °C.
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?
24°C 39%
25°C 32%
23°C 18%
26°C 8%
NEW
$10,997 Vol.
NEW
$10,997 Vol.
Sep 18, 2026
19°C or below
<1%
20°C
<1%
21°C
2%
22°C
4%
23°C
18%
24°C
39%
25°C
32%
26°C
8%
27°C
2%
28°C
<1%
29°C or higher
<1%
24°C 39%
25°C 32%
23°C 18%
26°C 8%
NEW
$10,997 Vol.
NEW
$10,997 Vol.
Sep 18, 2026
19°C or below
$1,379 Vol.
<1%
20°C
$392 Vol.
<1%
21°C
$390 Vol.
2%
22°C
$435 Vol.
4%
23°C
$2,632 Vol.
18%
24°C
$1,437 Vol.
39%
25°C
$2,000 Vol.
32%
26°C
$737 Vol.
8%
27°C
$397 Vol.
2%
28°C
$375 Vol.
<1%
29°C or higher
$825 Vol.
<1%
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.Recent forecasts from the Japan Meteorological Agency and ensemble models indicate mostly cloudy conditions with light northerly winds and a chance of drizzle or scattered showers for Tokyo on September 18, limiting solar heating and keeping afternoon maxima near 23–25 °C. Persistent cloud cover from a nearby frontal system and higher humidity reduce the diurnal temperature range compared with seasonal normals of 26–27 °C, while modest northerly flow advects slightly cooler maritime air. Small differences among leading outcomes hinge on the precise timing and coverage of any showers, boundary-layer mixing depth, and shortwave radiative flux under variable stratiform clouds; later model runs or updated JMA guidance could shift the peak by 1 °C.
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
$10,997End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=rjttResolver
0x69c47De9D...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.Recent forecasts from the Japan Meteorological Agency and ensemble models indicate mostly cloudy conditions with light northerly winds and a chance of drizzle or scattered showers for Tokyo on September 18, limiting solar heating and keeping afternoon maxima near 23–25 °C. Persistent cloud cover from a nearby frontal system and higher humidity reduce the diurnal temperature range compared with seasonal normals of 26–27 °C, while modest northerly flow advects slightly cooler maritime air. Small differences among leading outcomes hinge on the precise timing and coverage of any showers, boundary-layer mixing depth, and shortwave radiative flux under variable stratiform clouds; later model runs or updated JMA guidance could shift the peak by 1 °C.
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
$10,997End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=rjttResolver
0x69c47De9D...Recent forecasts from the Japan Meteorological Agency and ensemble models indicate mostly cloudy conditions with light northerly winds and a chance of drizzle or scattered showers for Tokyo on September 18, limiting solar heating and keeping afternoon maxima near 23–25 °C. Persistent cloud cover from a nearby frontal system and higher humidity reduce the diurnal temperature range compared with seasonal normals of 26–27 °C, while modest northerly flow advects slightly cooler maritime air. Small differences among leading outcomes hinge on the precise timing and coverage of any showers, boundary-layer mixing depth, and shortwave radiative flux under variable stratiform clouds; later model runs or updated JMA guidance could shift the peak by 1 °C.
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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