Official National Weather Service observations from Houston Intercontinental Airport and nearby stations recorded a daily maximum of 92–93°F on September 21, 2026, aligning with National Blend of Models guidance that anticipated modest cooling from the preceding multi-day heat wave. Late-September climatology places the average high near 88°F, yet persistent high pressure, weak steering flow, and Gulf moisture kept conditions above normal while preventing stronger afternoon heating or convective cooling. This market-implied outcome reflects verified station data rather than forecasts, with near-certainty driven by the narrow range of plausible observational outcomes once the day concluded. Only a post-analysis quality-control adjustment or use of an atypical secondary station could realistically alter the recorded 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 Houston on September 21?
Highest temperature in Houston on September 21?
92-93°F 100.0%
85°F or below <1%
86-87°F <1%
88-89°F <1%
$28,153 Vol.
$28,153 Vol.
Sep 21, 2026
85°F or below
<1%
86-87°F
<1%
88-89°F
<1%
90-91°F
<1%
92-93°F
100%
94-95°F
<1%
96-97°F
<1%
98-99°F
<1%
100-101°F
<1%
102-103°F
<1%
104°F or higher
<1%
92-93°F 100.0%
85°F or below <1%
86-87°F <1%
88-89°F <1%
$28,153 Vol.
$28,153 Vol.
Sep 21, 2026
85°F or below
$280 Vol.
<1%
86-87°F
$608 Vol.
<1%
88-89°F
$2,084 Vol.
<1%
90-91°F
$3,448 Vol.
<1%
92-93°F
$8,101 Vol.
100%
94-95°F
$8,055 Vol.
<1%
96-97°F
$3,643 Vol.
<1%
98-99°F
$675 Vol.
<1%
100-101°F
$542 Vol.
<1%
102-103°F
$687 Vol.
<1%
104°F or higher
$31 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the William P. Hobby Airport Station in degrees Fahrenheit on 21 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=khou
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 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.Official National Weather Service observations from Houston Intercontinental Airport and nearby stations recorded a daily maximum of 92–93°F on September 21, 2026, aligning with National Blend of Models guidance that anticipated modest cooling from the preceding multi-day heat wave. Late-September climatology places the average high near 88°F, yet persistent high pressure, weak steering flow, and Gulf moisture kept conditions above normal while preventing stronger afternoon heating or convective cooling. This market-implied outcome reflects verified station data rather than forecasts, with near-certainty driven by the narrow range of plausible observational outcomes once the day concluded. Only a post-analysis quality-control adjustment or use of an atypical secondary station could realistically alter the recorded maximum.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the William P. Hobby Airport Station in degrees Fahrenheit on 21 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=khou
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 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 NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=khou
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 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: Sep 19, 2026, 2:56 AM ET
Volume
$28,153End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 2:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=khouResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the William P. Hobby Airport Station in degrees Fahrenheit on 21 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=khou
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 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.Official National Weather Service observations from Houston Intercontinental Airport and nearby stations recorded a daily maximum of 92–93°F on September 21, 2026, aligning with National Blend of Models guidance that anticipated modest cooling from the preceding multi-day heat wave. Late-September climatology places the average high near 88°F, yet persistent high pressure, weak steering flow, and Gulf moisture kept conditions above normal while preventing stronger afternoon heating or convective cooling. This market-implied outcome reflects verified station data rather than forecasts, with near-certainty driven by the narrow range of plausible observational outcomes once the day concluded. Only a post-analysis quality-control adjustment or use of an atypical secondary station could realistically alter the recorded maximum.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the William P. Hobby Airport Station in degrees Fahrenheit on 21 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=khou
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 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 NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=khou
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
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 US Units w/ kts" button until the relevant table displays °F.
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 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
$28,153End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 2:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=khouResolver
0x69c47De9D...Official National Weather Service observations from Houston Intercontinental Airport and nearby stations recorded a daily maximum of 92–93°F on September 21, 2026, aligning with National Blend of Models guidance that anticipated modest cooling from the preceding multi-day heat wave. Late-September climatology places the average high near 88°F, yet persistent high pressure, weak steering flow, and Gulf moisture kept conditions above normal while preventing stronger afternoon heating or convective cooling. This market-implied outcome reflects verified station data rather than forecasts, with near-certainty driven by the narrow range of plausible observational outcomes once the day concluded. Only a post-analysis quality-control adjustment or use of an atypical secondary station could realistically alter the recorded 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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