Persistent cloud cover, scattered thunderstorms, and elevated humidity levels overnight have limited radiational cooling across Miami, keeping the daily minimum temperature tightly clustered in the mid-to-upper 70s°F according to National Weather Service observations and model guidance. Light southerly winds and high dew points near 77°F have further suppressed the overnight low, with preliminary data showing a minimum of 77°F early on September 22. Trader sentiment remains split between the 76-77°F and 78-79°F bins because small differences in storm timing or brief clear spells can shift the exact low by 1–2°F, while broader atmospheric patterns including tropical moisture influx align with late-September climatology that rarely allows deeper cooling without a frontal passage.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Miami on September 22?
76-77°F 49%
69°F or below 48%
74-75°F 22%
72-73°F 14%
$6,532 Vol.
$6,532 Vol.
69°F or below
48%
70-71°F
6%
72-73°F
14%
74-75°F
22%
76-77°F
49%
78-79°F
60%
80-81°F
<1%
82-83°F
<1%
84-85°F
<1%
86-87°F
<1%
88°F or higher
<1%
76-77°F 49%
69°F or below 48%
74-75°F 22%
72-73°F 14%
$6,532 Vol.
$6,532 Vol.
69°F or below
48%
70-71°F
6%
72-73°F
14%
74-75°F
22%
76-77°F
49%
78-79°F
60%
80-81°F
<1%
82-83°F
<1%
84-85°F
<1%
86-87°F
<1%
88°F or higher
<1%
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=kmia
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 20, 2026, 3:29 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=kmiaResolver
0x69c47De9D...The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=kmia
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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=kmiaResolver
0x69c47De9D...Persistent cloud cover, scattered thunderstorms, and elevated humidity levels overnight have limited radiational cooling across Miami, keeping the daily minimum temperature tightly clustered in the mid-to-upper 70s°F according to National Weather Service observations and model guidance. Light southerly winds and high dew points near 77°F have further suppressed the overnight low, with preliminary data showing a minimum of 77°F early on September 22. Trader sentiment remains split between the 76-77°F and 78-79°F bins because small differences in storm timing or brief clear spells can shift the exact low by 1–2°F, while broader atmospheric patterns including tropical moisture influx align with late-September climatology that rarely allows deeper cooling without a frontal passage.
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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