Official observations from the National Weather Service at Hartsfield-Jackson Atlanta International Airport (KATL)—the market's resolving station—confirm the highest temperature on April 21, 2026, reached 78-79°F under partly cloudy skies and light easterly winds, aligning with trader consensus at 100% implied probability. This outcome reflects real-time automated surface observing system (ASOS) data, corroborated by Weather Underground archives showing peaks near 79°F amid a high-pressure ridge suppressing stronger warming. Preceding NOAA forecast models (GFS, ECMWF) had converged on mid-to-upper 70s, with minimal deviation due to stable atmospheric conditions. Realistic challenges include rare post-quality-control revisions by NWS meteorologists or sensor recalibrations, though such adjustments seldom alter daily maxima after initial validation; next climate summary expected today.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Atlanta on April 21?
Highest temperature in Atlanta on April 21?
78-79°F 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$99,190 Vol.
$99,190 Vol.
Apr 21, 2026
71°F or below
No
72-73°F
No
74-75°F
No
76-77°F
No
78-79°F
Yes
80-81°F
No
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
No
90°F or higher
No
78-79°F 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$99,190 Vol.
$99,190 Vol.
Apr 21, 2026
71°F or below
$8,501 Vol.
No
72-73°F
$7,998 Vol.
No
74-75°F
$7,030 Vol.
No
76-77°F
$12,557 Vol.
No
78-79°F
$17,661 Vol.
Yes
80-81°F
$11,618 Vol.
No
82-83°F
$16,359 Vol.
No
84-85°F
$5,371 Vol.
No
86-87°F
$3,159 Vol.
No
88-89°F
$2,794 Vol.
No
90°F or higher
$6,140 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Hartsfield-Jackson International Airport Station in degrees Fahrenheit on 21 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Hartsfield-Jackson International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ga/atlanta/KATL.
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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official observations from the National Weather Service at Hartsfield-Jackson Atlanta International Airport (KATL)—the market's resolving station—confirm the highest temperature on April 21, 2026, reached 78-79°F under partly cloudy skies and light easterly winds, aligning with trader consensus at 100% implied probability. This outcome reflects real-time automated surface observing system (ASOS) data, corroborated by Weather Underground archives showing peaks near 79°F amid a high-pressure ridge suppressing stronger warming. Preceding NOAA forecast models (GFS, ECMWF) had converged on mid-to-upper 70s, with minimal deviation due to stable atmospheric conditions. Realistic challenges include rare post-quality-control revisions by NWS meteorologists or sensor recalibrations, though such adjustments seldom alter daily maxima after initial validation; next climate summary expected today.
This market will resolve to the temperature range that contains the highest temperature recorded at the Hartsfield-Jackson International Airport Station in degrees Fahrenheit on 21 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Hartsfield-Jackson International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ga/atlanta/KATL.
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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Hartsfield-Jackson International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ga/atlanta/KATL.
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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 19, 2026, 12:17 AM ET
Volume
$99,190End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:17 AM ETResolution Source
https://www.wunderground.com/history/daily/us/ga/atlanta/KATLResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Hartsfield-Jackson International Airport Station in degrees Fahrenheit on 21 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Hartsfield-Jackson International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ga/atlanta/KATL.
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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official observations from the National Weather Service at Hartsfield-Jackson Atlanta International Airport (KATL)—the market's resolving station—confirm the highest temperature on April 21, 2026, reached 78-79°F under partly cloudy skies and light easterly winds, aligning with trader consensus at 100% implied probability. This outcome reflects real-time automated surface observing system (ASOS) data, corroborated by Weather Underground archives showing peaks near 79°F amid a high-pressure ridge suppressing stronger warming. Preceding NOAA forecast models (GFS, ECMWF) had converged on mid-to-upper 70s, with minimal deviation due to stable atmospheric conditions. Realistic challenges include rare post-quality-control revisions by NWS meteorologists or sensor recalibrations, though such adjustments seldom alter daily maxima after initial validation; next climate summary expected today.
This market will resolve to the temperature range that contains the highest temperature recorded at the Hartsfield-Jackson International Airport Station in degrees Fahrenheit on 21 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Hartsfield-Jackson International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ga/atlanta/KATL.
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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Hartsfield-Jackson International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ga/atlanta/KATL.
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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Volume
$99,190End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:17 AM ETResolution Source
https://www.wunderground.com/history/daily/us/ga/atlanta/KATLResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from the National Weather Service at Hartsfield-Jackson Atlanta International Airport (KATL)—the market's resolving station—confirm the highest temperature on April 21, 2026, reached 78-79°F under partly cloudy skies and light easterly winds, aligning with trader consensus at 100% implied probability. This outcome reflects real-time automated surface observing system (ASOS) data, corroborated by Weather Underground archives showing peaks near 79°F amid a high-pressure ridge suppressing stronger warming. Preceding NOAA forecast models (GFS, ECMWF) had converged on mid-to-upper 70s, with minimal deviation due to stable atmospheric conditions. Realistic challenges include rare post-quality-control revisions by NWS meteorologists or sensor recalibrations, though such adjustments seldom alter daily maxima after initial validation; next climate summary expected today.
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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