**Persistent northeasterly flow and an approaching upper-level low are sustaining high moisture and cloud cover over South Florida, moderating overnight radiative cooling and anchoring Miami's expected minimum temperature on September 17 in the upper 70s.** Official NWS guidance and ensemble forecasts show lows centered near 78–79 °F, with scattered to likely showers and thunderstorms—especially overnight—reducing the potential for clearer skies that would allow deeper cooling toward the mid-70s. Historical September averages (roughly 77 °F) and recent model consensus support the tight clustering between the 76–79 °F bins, while any earlier or heavier rain timing could shift the outcome slightly lower. Traders are weighing these variables ahead of the next model runs and updated NWS briefings.
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 17?
76-77°F 38%
78-79°F 32%
74-75°F 16%
82-83°F 10%
71°F or below
1%
72-73°F
8%
74-75°F
16%
76-77°F
38%
78-79°F
32%
80-81°F
10%
82-83°F
10%
84-85°F
3%
86-87°F
1%
88-89°F
1%
90°F or higher
1%
76-77°F 38%
78-79°F 32%
74-75°F 16%
82-83°F 10%
71°F or below
1%
72-73°F
8%
74-75°F
16%
76-77°F
38%
78-79°F
32%
80-81°F
10%
82-83°F
10%
84-85°F
3%
86-87°F
1%
88-89°F
1%
90°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 15, 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 northeasterly flow and an approaching upper-level low are sustaining high moisture and cloud cover over South Florida, moderating overnight radiative cooling and anchoring Miami's expected minimum temperature on September 17 in the upper 70s.** Official NWS guidance and ensemble forecasts show lows centered near 78–79 °F, with scattered to likely showers and thunderstorms—especially overnight—reducing the potential for clearer skies that would allow deeper cooling toward the mid-70s. Historical September averages (roughly 77 °F) and recent model consensus support the tight clustering between the 76–79 °F bins, while any earlier or heavier rain timing could shift the outcome slightly lower. Traders are weighing these variables ahead of the next model runs and updated NWS briefings.
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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