Official National Weather Service observations from Miami International Airport recorded a daily maximum of 88°F on May 20, 2026, under mostly sunny skies with light easterly winds and no significant cloud cover or precipitation to suppress temperatures. This aligns closely with climatological averages for late May and recent model guidance from NOAA, which had projected highs near 87–88°F without any strong frontal passages or tropical moisture influx. Traders rapidly converged on the 88–89°F bin as the resolution data became available, reflecting the low uncertainty typical for short-range temperature markets once actual measurements are confirmed. Revised station reports or alternative measurement protocols remain the only realistic scenarios that could shift the outcome, though such changes are historically rare for this location.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Miami on May 20?
88-89°F 100.0%
90-91°F <1%
92-93°F <1%
94-95°F <1%
$34,016 Vol.
$34,016 Vol.
88-89°F
100%
90-91°F
<1%
92-93°F
<1%
94-95°F
<1%
96°F or higher
<1%
88-89°F 100.0%
90-91°F <1%
92-93°F <1%
94-95°F <1%
$34,016 Vol.
$34,016 Vol.
88-89°F
100%
90-91°F
<1%
92-93°F
<1%
94-95°F
<1%
96°F or higher
<1%
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 Miami Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/fl/miami/KMIA.
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: May 18, 2026, 12:06 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/fl/miami/KMIAResolver
0x69c47De9D...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 Miami Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/fl/miami/KMIA.
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.
Resolution Source
https://www.wunderground.com/history/daily/us/fl/miami/KMIAResolver
0x69c47De9D...Official National Weather Service observations from Miami International Airport recorded a daily maximum of 88°F on May 20, 2026, under mostly sunny skies with light easterly winds and no significant cloud cover or precipitation to suppress temperatures. This aligns closely with climatological averages for late May and recent model guidance from NOAA, which had projected highs near 87–88°F without any strong frontal passages or tropical moisture influx. Traders rapidly converged on the 88–89°F bin as the resolution data became available, reflecting the low uncertainty typical for short-range temperature markets once actual measurements are confirmed. Revised station reports or alternative measurement protocols remain the only realistic scenarios that could shift the outcome, though such changes are historically rare for this location.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

Beware of external links.
Beware of external links.
Frequently Asked Questions