Current National Weather Service and model consensus forecasts for Miami show overnight lows of 76–78°F on September 20 amid scattered thunderstorms and high humidity, with minimal overnight cooling under cloudy skies and light winds. This pattern aligns with the market’s leading 76–77°F outcome at 45.5% implied probability, as persistent tropical moisture and typical late-September steering patterns limit radiational cooling. The 74–75°F and 72–73°F bins trail at 32% and 18%, reflecting residual uncertainty in exact minimum timing or localized heavier rain that could briefly suppress temperatures. No significant frontal passages or model shifts have altered this outlook in the past 48 hours, keeping trader focus on the next NHC and local forecast updates through the resolution window.
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 20?
76-77°F 46%
74-75°F 32%
72-73°F 18%
78-79°F 8%
69°F or below
2%
70-71°F
7%
72-73°F
18%
74-75°F
32%
76-77°F
46%
78-79°F
8%
80-81°F
7%
82-83°F
3%
84-85°F
1%
86-87°F
1%
88°F or higher
1%
76-77°F 46%
74-75°F 32%
72-73°F 18%
78-79°F 8%
69°F or below
2%
70-71°F
7%
72-73°F
18%
74-75°F
32%
76-77°F
46%
78-79°F
8%
80-81°F
7%
82-83°F
3%
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 18, 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...Current National Weather Service and model consensus forecasts for Miami show overnight lows of 76–78°F on September 20 amid scattered thunderstorms and high humidity, with minimal overnight cooling under cloudy skies and light winds. This pattern aligns with the market’s leading 76–77°F outcome at 45.5% implied probability, as persistent tropical moisture and typical late-September steering patterns limit radiational cooling. The 74–75°F and 72–73°F bins trail at 32% and 18%, reflecting residual uncertainty in exact minimum timing or localized heavier rain that could briefly suppress temperatures. No significant frontal passages or model shifts have altered this outlook in the past 48 hours, keeping trader focus on the next NHC and local forecast updates through the resolution window.
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