**Forecasts from multiple sources, including GFS-based models and local reports on September 12, point to an overnight low in Miami on September 13 in the upper 70s°F, aligning with the market's leading outcomes of 78-79°F (39.5% implied probability) and 76-77°F (28.5%).** Typical late-summer conditions feature high humidity, dew points near 76-78°F, and light variable winds that limit radiative cooling after daytime highs around 86-88°F. Afternoon thunderstorms, with 60-90% probability in several models, can enhance overnight cloud cover and further moderate temperature drops. Historical September 13 averages (1991-2020) show a mean low of 77.1°F, with recent years ranging from 74°F to 82°F, providing context for the tight clustering around 76-81°F bins. No significant frontal systems or tropical influences appear in current guidance, supporting trader consensus on these ranges. Updated model runs or evening observations could shift probabilities if skies clear more than expected or if heavier rain persists.
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 13?
78-79°F 39%
76-77°F 29%
84-85°F 15%
80-81°F 14%
71°F or below
2%
72-73°F
6%
74-75°F
12%
76-77°F
29%
78-79°F
39%
80-81°F
14%
82-83°F
9%
84-85°F
15%
86-87°F
1%
88-89°F
<1%
90°F or higher
<1%
78-79°F 39%
76-77°F 29%
84-85°F 15%
80-81°F 14%
71°F or below
2%
72-73°F
6%
74-75°F
12%
76-77°F
29%
78-79°F
39%
80-81°F
14%
82-83°F
9%
84-85°F
15%
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 11, 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...**Forecasts from multiple sources, including GFS-based models and local reports on September 12, point to an overnight low in Miami on September 13 in the upper 70s°F, aligning with the market's leading outcomes of 78-79°F (39.5% implied probability) and 76-77°F (28.5%).** Typical late-summer conditions feature high humidity, dew points near 76-78°F, and light variable winds that limit radiative cooling after daytime highs around 86-88°F. Afternoon thunderstorms, with 60-90% probability in several models, can enhance overnight cloud cover and further moderate temperature drops. Historical September 13 averages (1991-2020) show a mean low of 77.1°F, with recent years ranging from 74°F to 82°F, providing context for the tight clustering around 76-81°F bins. No significant frontal systems or tropical influences appear in current guidance, supporting trader consensus on these ranges. Updated model runs or evening observations could shift probabilities if skies clear more than expected or if heavier rain persists.
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