A rapidly strengthening Super El Niño, with Niño 3.4 sea surface temperature anomalies already near +1.8°C and models projecting a peak exceeding +2.5°C by late 2026, stands as the dominant influence on early-season snowfall timing. NOAA assigns greater than 90% probability of a very strong event this fall and winter, shifting the Pacific jet stream southward and favoring drier, warmer conditions across the northern U.S. and Canada while enhancing precipitation potential farther south. This pattern typically delays first measurable snow (≥0.1 inch) in northern plains and Great Lakes cities relative to climatological medians, while increasing early September chances at high-elevation Rocky Mountain sites in Montana, Idaho, Utah, and Wyoming. Upcoming CPC seasonal outlooks and weekly ENSO updates will refine model consensus on jet stream positioning and cold-air intrusions that could trigger the initial events.
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
50%

Denver, CO by October 31
51%

Minneapolis, MN by October 31
49%

Salt Lake City, UT by October 31
49%

Boston, MA by November 15
51%

Buffalo, NY by November 15
51%

Chicago, IL by November 15
50%

Denver, CO by November 15
51%

Detroit, MI by November 15
50%

Indianapolis, IN by November 15
50%

Kansas City, MO by November 15
51%

Minneapolis, MN by November 15
49%

Pittsburgh, PA by November 15
50%

Salt Lake City, UT by November 15
51%

Boston, MA by November 30
51%

Buffalo, NY by November 30
96%

Chicago, IL by November 30
51%

Cincinnati, OH by November 30
49%

Dallas, TX by November 30
50%

Denver, CO by November 30
50%

Detroit, MI by November 30
51%

Indianapolis, IN by November 30
50%

Kansas City, MO by November 30
50%

Minneapolis, MN by November 30
51%

Nashville, TN by November 30
51%

New York City, NY by November 30
51%

Philadelphia, PA by November 30
51%

Pittsburgh, PA by November 30
51%

Salt Lake City, UT by November 30
51%

St. Louis, MO by November 30
51%

Washington, DC by November 30
50%
$0.00 Vol.

Buffalo, NY by October 31
50%

Denver, CO by October 31
51%

Minneapolis, MN by October 31
49%

Salt Lake City, UT by October 31
49%

Boston, MA by November 15
51%

Buffalo, NY by November 15
51%

Chicago, IL by November 15
50%

Denver, CO by November 15
51%

Detroit, MI by November 15
50%

Indianapolis, IN by November 15
50%

Kansas City, MO by November 15
51%

Minneapolis, MN by November 15
49%

Pittsburgh, PA by November 15
50%

Salt Lake City, UT by November 15
51%

Boston, MA by November 30
51%

Buffalo, NY by November 30
96%

Chicago, IL by November 30
51%

Cincinnati, OH by November 30
49%

Dallas, TX by November 30
50%

Denver, CO by November 30
50%

Detroit, MI by November 30
51%

Indianapolis, IN by November 30
50%

Kansas City, MO by November 30
50%

Minneapolis, MN by November 30
51%

Nashville, TN by November 30
51%

New York City, NY by November 30
51%

Philadelphia, PA by November 30
51%

Pittsburgh, PA by November 30
51%

Salt Lake City, UT by November 30
51%

St. Louis, MO by November 30
51%

Washington, DC by November 30
50%
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 KBUF (midnight to midnight local time, America/New_York).
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 KBUF, issued as product CLIBUF. 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=CLIBUF.
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 KBUF (midnight to midnight local time, America/New_York).
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 KBUF, issued as product CLIBUF. 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=CLIBUF.
A rapidly strengthening Super El Niño, with Niño 3.4 sea surface temperature anomalies already near +1.8°C and models projecting a peak exceeding +2.5°C by late 2026, stands as the dominant influence on early-season snowfall timing. NOAA assigns greater than 90% probability of a very strong event this fall and winter, shifting the Pacific jet stream southward and favoring drier, warmer conditions across the northern U.S. and Canada while enhancing precipitation potential farther south. This pattern typically delays first measurable snow (≥0.1 inch) in northern plains and Great Lakes cities relative to climatological medians, while increasing early September chances at high-elevation Rocky Mountain sites in Montana, Idaho, Utah, and Wyoming. Upcoming CPC seasonal outlooks and weekly ENSO updates will refine model consensus on jet stream positioning and cold-air intrusions that could trigger the initial events.
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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