A strengthening El Niño, now with over 90% confidence per NOAA, is the dominant factor shaping early trader positioning for the first measurable snowfall (0.1 inch or more) in major northern cities. This pattern typically shifts the jet stream southward, favoring above-normal temperatures across the Midwest and Northeast through fall and into early winter, which can delay the arrival of sustained cold air needed for snow at low elevations. Recent seasonal outlooks from the Old Farmer’s Almanac and ECMWF/UKMO models show mixed signals, with some above-normal precipitation possible but overall milder conditions in the Great Lakes and Northeast compared to climatology. Historical medians place first snow in Chicago and Detroit around mid-November and New York City slightly later; traders are watching October model runs and early cold-front passages for signals of earlier or later timing. No measurable snow has occurred yet in these markets as of mid-September.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedFirst snow of the 2026 season

Buffalo, NY by October 31
73%

Denver, CO by October 31
63%

Minneapolis, MN by October 31
54%

Salt Lake City, UT by October 31
56%

Boston, MA by November 15
63%

Buffalo, NY by November 15
94%

Chicago, IL by November 15
71%

Denver, CO by November 15
99%

Detroit, MI by November 15
87%

Indianapolis, IN by November 15
86%

Kansas City, MO by November 15
29%

Minneapolis, MN by November 15
89%

Pittsburgh, PA by November 15
53%

Salt Lake City, UT by November 15
71%

Boston, MA by November 30
85%

Buffalo, NY by November 30
93%

Chicago, IL by November 30
72%

Cincinnati, OH by November 30
83%

Dallas, TX by November 30
11%

Denver, CO by November 30
99%

Detroit, MI by November 30
88%

Indianapolis, IN by November 30
100%

Kansas City, MO by November 30
55%

Minneapolis, MN by November 30
94%

Nashville, TN by November 30
29%

New York City, NY by November 30
68%

Philadelphia, PA by November 30
51%

Pittsburgh, PA by November 30
77%

Salt Lake City, UT by November 30
88%

St. Louis, MO by November 30
75%

Washington, DC by November 30
43%
$9,966 Vol.

Buffalo, NY by October 31
73%

Denver, CO by October 31
63%

Minneapolis, MN by October 31
54%

Salt Lake City, UT by October 31
56%

Boston, MA by November 15
63%

Buffalo, NY by November 15
94%

Chicago, IL by November 15
71%

Denver, CO by November 15
99%

Detroit, MI by November 15
87%

Indianapolis, IN by November 15
86%

Kansas City, MO by November 15
29%

Minneapolis, MN by November 15
89%

Pittsburgh, PA by November 15
53%

Salt Lake City, UT by November 15
71%

Boston, MA by November 30
85%

Buffalo, NY by November 30
93%

Chicago, IL by November 30
72%

Cincinnati, OH by November 30
83%

Dallas, TX by November 30
11%

Denver, CO by November 30
99%

Detroit, MI by November 30
88%

Indianapolis, IN by November 30
100%

Kansas City, MO by November 30
55%

Minneapolis, MN by November 30
94%

Nashville, TN by November 30
29%

New York City, NY by November 30
68%

Philadelphia, PA by November 30
51%

Pittsburgh, PA by November 30
77%

Salt Lake City, UT by November 30
88%

St. Louis, MO by November 30
75%

Washington, DC by November 30
43%
Any amount of snowfall qualifies, including a report of "T" (trace) - snow observed but too little to measure. Once snowfall is reported, this market resolves "Yes" immediately, without waiting for the rest of the window. This market resolves "No" only if no snowfall is reported for any day of the window.
The observation day is the National Weather Service climate day at KIND (midnight to midnight local time, America/Indiana/Indianapolis).
Resolution is based on the station's first published snowfall figure for each day, as given in the first final Daily Climate Report for that day. Intermediate reports issued during the day are not used. Subsequent revisions or corrections will not be considered; the first published value is final. A report whose snowfall value is missing (for example, shown as "M") does not count as a published value; the snowfall figure for that day will be taken from the first subsequent report that includes one. If a day's snowfall value is missing but the month-to-date or season-to-date snowfall total in that day's final report is higher than in the previous day's final report, snow fell on that day and this market resolves "Yes". This market resolves as soon as its outcome is determined - "Yes" as soon as any day's report shows snowfall, or "No" as soon as every day of the window has a published snowfall figure and every figure is zero. There is no waiting period. If any day's snowfall figure remains unpublished, the market will remain open until the earlier of the figure being published or the 3rd day after the specified date, 11:59 PM ET, at which point any such day is treated as zero snowfall.
The resolution source for this market is the NWS Daily Climate Report for KIND, issued as product CLIIND. That page shows the latest report only; past daily reports are archived on the Iowa Environmental Mesonet at https://mesonet.agron.iastate.edu/wx/afos/list.phtml?by=pil&pil=CLIIND.
Market Opened: Sep 2, 2026, 4:27 PM ET
Any amount of snowfall qualifies, including a report of "T" (trace) - snow observed but too little to measure. Once snowfall is reported, this market resolves "Yes" immediately, without waiting for the rest of the window. This market resolves "No" only if no snowfall is reported for any day of the window.
The observation day is the National Weather Service climate day at KIND (midnight to midnight local time, America/Indiana/Indianapolis).
Resolution is based on the station's first published snowfall figure for each day, as given in the first final Daily Climate Report for that day. Intermediate reports issued during the day are not used. Subsequent revisions or corrections will not be considered; the first published value is final. A report whose snowfall value is missing (for example, shown as "M") does not count as a published value; the snowfall figure for that day will be taken from the first subsequent report that includes one. If a day's snowfall value is missing but the month-to-date or season-to-date snowfall total in that day's final report is higher than in the previous day's final report, snow fell on that day and this market resolves "Yes". This market resolves as soon as its outcome is determined - "Yes" as soon as any day's report shows snowfall, or "No" as soon as every day of the window has a published snowfall figure and every figure is zero. There is no waiting period. If any day's snowfall figure remains unpublished, the market will remain open until the earlier of the figure being published or the 3rd day after the specified date, 11:59 PM ET, at which point any such day is treated as zero snowfall.
The resolution source for this market is the NWS Daily Climate Report for KIND, issued as product CLIIND. That page shows the latest report only; past daily reports are archived on the Iowa Environmental Mesonet at https://mesonet.agron.iastate.edu/wx/afos/list.phtml?by=pil&pil=CLIIND.
A strengthening El Niño, now with over 90% confidence per NOAA, is the dominant factor shaping early trader positioning for the first measurable snowfall (0.1 inch or more) in major northern cities. This pattern typically shifts the jet stream southward, favoring above-normal temperatures across the Midwest and Northeast through fall and into early winter, which can delay the arrival of sustained cold air needed for snow at low elevations. Recent seasonal outlooks from the Old Farmer’s Almanac and ECMWF/UKMO models show mixed signals, with some above-normal precipitation possible but overall milder conditions in the Great Lakes and Northeast compared to climatology. Historical medians place first snow in Chicago and Detroit around mid-November and New York City slightly later; traders are watching October model runs and early cold-front passages for signals of earlier or later timing. No measurable snow has occurred yet in these markets as of mid-September.
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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