As of early September 2026, above-average temperatures across much of the contiguous United States keep the first measurable snowfall (0.1 inch or greater per National Weather Service criteria) weeks or months away for major cities. A strengthening El Niño pattern, with over 90% odds of becoming a significant event, favors warmer conditions that could delay first snow relative to historical medians—typically September or October in the northern Rockies and Alaska, November in the Midwest and interior Northeast, and December along the I-95 corridor. Recent forecasts from NOAA and the Old Farmer’s Almanac highlight a mostly mild start to fall, though early cold air intrusions or lake-effect setups remain key variables. Traders should monitor upcoming NWS model runs and temperature anomaly updates for shifts in timing.
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
54%

Denver, CO by October 31
64%

Minneapolis, MN by October 31
62%

Salt Lake City, UT by October 31
53%

Boston, MA by November 15
57%

Buffalo, NY by November 15
89%

Chicago, IL by November 15
59%

Denver, CO by November 15
94%

Detroit, MI by November 15
89%

Indianapolis, IN by November 15
82%

Kansas City, MO by November 15
30%

Minneapolis, MN by November 15
82%

Pittsburgh, PA by November 15
60%

Salt Lake City, UT by November 15
87%

Boston, MA by November 30
84%

Buffalo, NY by November 30
92%

Chicago, IL by November 30
79%

Cincinnati, OH by November 30
83%

Dallas, TX by November 30
11%

Denver, CO by November 30
99%

Detroit, MI by November 30
87%

Indianapolis, IN by November 30
94%

Kansas City, MO by November 30
84%

Minneapolis, MN by November 30
93%

Nashville, TN by November 30
29%

New York City, NY by November 30
68%

Philadelphia, PA by November 30
17%

Pittsburgh, PA by November 30
77%

Salt Lake City, UT by November 30
89%

St. Louis, MO by November 30
75%

Washington, DC by November 30
44%
$7,369 Vol.

Buffalo, NY by October 31
54%

Denver, CO by October 31
64%

Minneapolis, MN by October 31
62%

Salt Lake City, UT by October 31
53%

Boston, MA by November 15
57%

Buffalo, NY by November 15
89%

Chicago, IL by November 15
59%

Denver, CO by November 15
94%

Detroit, MI by November 15
89%

Indianapolis, IN by November 15
82%

Kansas City, MO by November 15
30%

Minneapolis, MN by November 15
82%

Pittsburgh, PA by November 15
60%

Salt Lake City, UT by November 15
87%

Boston, MA by November 30
84%

Buffalo, NY by November 30
92%

Chicago, IL by November 30
79%

Cincinnati, OH by November 30
83%

Dallas, TX by November 30
11%

Denver, CO by November 30
99%

Detroit, MI by November 30
87%

Indianapolis, IN by November 30
94%

Kansas City, MO by November 30
84%

Minneapolis, MN by November 30
93%

Nashville, TN by November 30
29%

New York City, NY by November 30
68%

Philadelphia, PA by November 30
17%

Pittsburgh, PA by November 30
77%

Salt Lake City, UT by November 30
89%

St. Louis, MO by November 30
75%

Washington, DC by November 30
44%
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 KDEN (midnight to midnight local time, America/Denver).
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 KDEN, issued as product CLIDEN. 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=CLIDEN.
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 KDEN (midnight to midnight local time, America/Denver).
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 KDEN, issued as product CLIDEN. 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=CLIDEN.
As of early September 2026, above-average temperatures across much of the contiguous United States keep the first measurable snowfall (0.1 inch or greater per National Weather Service criteria) weeks or months away for major cities. A strengthening El Niño pattern, with over 90% odds of becoming a significant event, favors warmer conditions that could delay first snow relative to historical medians—typically September or October in the northern Rockies and Alaska, November in the Midwest and interior Northeast, and December along the I-95 corridor. Recent forecasts from NOAA and the Old Farmer’s Almanac highlight a mostly mild start to fall, though early cold air intrusions or lake-effect setups remain key variables. Traders should monitor upcoming NWS model runs and temperature anomaly updates for shifts in timing.
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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