AccuWeather’s winter outlook for Denver calls for 10 to 18 days with at least 2 inches of snow, against a historical average of 9 days. The range runs from a season only slightly busier than normal to one with double the usual count of meaningful snow days, and it lands as an El Niño that forecasters say could rival any on record builds across the equatorial Pacific.
Help yourself and the planet: The Cool Down makes it easy to help yourself while helping the planet, with smart, simple changes to save more and waste less in your everyday life.
We may earn a commission if you sign up.
A seasonal outlook describes tendencies across three months, not individual storms, and the Denver number counts days rather than totals. Which end of the range Colorado lands on will depend on how many Pacific systems actually track across the central Rockies once meteorological winter begins on Dec. 1 and runs through February.
AccuWeather’s Denver count and the central Rockies
The Denver figure comes through Autoblog’s roundup of the new winter outlooks, which reports AccuWeather’s forecast of 10 to 18 days of at least 2 inches against the 9-day historical average. The same roundup says the Southern Rockies carry the clearest snow signal on the national maps, and it quotes National Weather Service Director Ken Graham explaining why: a very strong El Niño “will likely bring a southward and eastward shift to the jet stream.”
AccuWeather’s own 2026-27 winter forecast, published Oct. 7 and updated Oct. 16, says frequent storms should bring heavier snow than last winter across the interior West, including the central and southern Rockies. It also expects the snow season to start early from the Sierra Nevada through the Great Basin and into those same ranges, which would bring the first meaningful accumulations to Colorado ahead of the usual schedule rather than waiting for midwinter.
Utah offers a measuring stick. According to the same AccuWeather forecast, Salt Lake City recorded only 3.7 inches of snow last winter, its least snowy season since records began in the 1880s, and the forecast calls for 50 to 65 inches this winter, slightly above the historical average. A rebound of that size in a neighboring state is the kind of swing that makes a Denver count of 10 to 18 days plausible, though the two forecasts are separate products for separate cities and neither guarantees the other. Colorado’s own snow season will also depend on temperatures, since a storm that arrives warm can leave rain in the city and snow only in the mountains.
The El Niño behind the forecast
The Climate Prediction Center’s El Niño diagnostic discussion, issued Oct. 8, keeps the system at an El Niño Advisory with the Niño-3.4 region of the Pacific running 2.1 degrees Celsius above average. It says a strong to very strong event is likely through January to March 2027, with the chance remaining greater than 83 percent. The same discussion puts the odds of a historic event, defined as 2.5 degrees Celsius or more, at 54 percent for September to November, 83 percent for October to December and 70 percent for November to January.
Autoblog frames the 83 percent figure as an El Niño stronger than any since 1950, up from 69 percent in early September. AccuWeather’s Paul Pastelok used similar language, saying the event “has the potential to be the strongest El Niño on record,” and the company’s forecast expects it to surpass the 1982-83 and 1997-98 episodes.
NOAA meteorologist Michelle L’Heureux, quoted by Newsweek, said “Right now, the event is forecasted to peak during the October-November-December season,” though the timeline could shift. The Climate Prediction Center’s own wording is more cautious about consequences: the chances of experiencing impacts consistent with El Niño are larger, “though not guaranteed.”
Weaker official odds for Colorado
Official precipitation odds for the mountain West are less emphatic than the commercial snow-day count. Autoblog reports that the Climate Prediction Center’s December to February map gives Colorado and southern Utah 33 to 40 percent odds of above-normal precipitation, compared with 40 to 50 percent for Arizona and New Mexico. The agency publishes the maps on its seasonal outlook page, and the next update is scheduled for Nov. 19. A precipitation probability is also a different quantity from a count of snow days, so the two products can both hold at once: wetter odds do not guarantee that storms arrive cold enough, or often enough, to reach 2 inches at Denver’s elevation.
Pastelok has been explicit that El Niño winters do not repeat one another. “Not all El Niño winter seasons behave the same,” he said in AccuWeather’s forecast, and he added that “it only takes one storm to flip the script,” a comment aimed at East Coast cities but applicable to any single-storm season.
The contrast with other metros is stark. Newsweek’s account of the AccuWeather outlook projects 12 to 25 inches for Chicago against an average of 38.4, and 15 to 30 inches for Boston against 49.2, which leaves the Rockies as one of the few regions where the forecast points toward more snow than normal rather than less. For Denver, the practical test will come in the first big storm of the season, and in whether the Nov. 19 update nudges the odds higher or lower.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
Help yourself and the planet: Get The Cool Down →
We may earn a commission if you sign up.
More from Morning Overview
- Ford is recalling 223,472 F-150 pickups because the fuel tank can leak or detach
- Hybrids have 15% fewer problems than gas cars, while EVs and plug-in hybrids have about 80% more, Consumer Reports finds
- Regulators cleared the first U.S. small modular reactor, 4 months early
- Lake Powell sank to a record 3,517 feet, nearing the level that stops Glen Canyon Dam’s turbines
