National Weather Service and ensemble model guidance currently favors a mild spring pattern with southerly flow and mostly clear skies, positioning New York City’s daily high for May 18 in the low-to-mid 80s and driving the market’s strongest consensus toward the 82–83 °F bin at 33.5 percent implied probability. Key variables include the strength of the onshore flow, which could add a few degrees through enhanced mixing, and any late-day cloud cover that might cap maximum readings near 80–81 °F, the second-most favored outcome at 23.5 percent. Forecasters note modest spread among guidance solutions, with some runs showing slightly stronger ridging that could push readings into the 84–85 °F range at 17.5 percent. Updated model runs and the evening Area Forecast Discussion will provide the next clearest signals ahead of tomorrow’s resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in NYC on May 18?
82-83°F 31%
80-81°F 22%
84-85°F 18%
78-79°F 11%
$14,579 Vol.
$14,579 Vol.
69°F or below
<1%
70-71°F
<1%
72-73°F
1%
74-75°F
1%
76-77°F
1%
78-79°F
11%
80-81°F
22%
82-83°F
31%
84-85°F
18%
86-87°F
8%
88°F or higher
4%
82-83°F 31%
80-81°F 22%
84-85°F 18%
78-79°F 11%
$14,579 Vol.
$14,579 Vol.
69°F or below
<1%
70-71°F
<1%
72-73°F
1%
74-75°F
1%
76-77°F
1%
78-79°F
11%
80-81°F
22%
82-83°F
31%
84-85°F
18%
86-87°F
8%
88°F or higher
4%
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 LaGuardia Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ny/new-york-city/KLGA.
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 16, 2026, 12:03 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/ny/new-york-city/KLGAThe 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 LaGuardia Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/ny/new-york-city/KLGA.
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/ny/new-york-city/KLGANational Weather Service and ensemble model guidance currently favors a mild spring pattern with southerly flow and mostly clear skies, positioning New York City’s daily high for May 18 in the low-to-mid 80s and driving the market’s strongest consensus toward the 82–83 °F bin at 33.5 percent implied probability. Key variables include the strength of the onshore flow, which could add a few degrees through enhanced mixing, and any late-day cloud cover that might cap maximum readings near 80–81 °F, the second-most favored outcome at 23.5 percent. Forecasters note modest spread among guidance solutions, with some runs showing slightly stronger ridging that could push readings into the 84–85 °F range at 17.5 percent. Updated model runs and the evening Area Forecast Discussion will provide the next clearest signals ahead of tomorrow’s resolution.
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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