NOAA’s New Winter Outlook: What It Says About Sundance Week 2027 in Boulder
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NOAA’s Climate Prediction Center issued an updated winter outlook on September 17, 2026, and it places Boulder and most of central and northern Colorado in the “equal chances” category for both temperature and precipitation this winter, while a strengthening El Nino is favored to bring wetter conditions to the southern half of the country and southern Colorado. In plain terms, the government’s own seasonal forecasters are not yet predicting an unusually warm, cold, wet, or dry January for Sundance 2027. This is a three-month seasonal outlook, not a forecast for the festival’s specific dates.
Last verified: September 17, 2026
What NOAA actually released
| Detail | Status |
|---|---|
| NOAA Climate Prediction Center updated its December through February outlook on September 17, 2026 | Confirmed |
| Central and northern Colorado, including the Boulder area, fall in the “equal chances” zone for both temperature and precipitation | Confirmed |
| Southern Colorado and the San Juan Mountains are favored for above normal precipitation as the Pacific storm track shifts south | Confirmed |
| This El Nino could rank among the strongest on record, with NOAA data suggesting a roughly 70 percent chance it becomes the warmest since 1950 | Reported, not yet confirmed |
| Specific temperature or snowfall for the January 21 to 31, 2027 festival window | Pending |
Seasonal outlooks like this one describe the probability that a three month period finishes above, near, or below the historical average across a whole region. They are built from ocean temperature patterns, especially the El Nino cycle in the tropical Pacific, and they say nothing about individual storms or specific weeks. NOAA plans to keep updating this outlook monthly as the festival gets closer, and a sharper picture for Sundance week itself will only be available from short range forecasts issued in early to mid January 2027.
Why this is different from our weather and packing guide
This site’s existing weather guide is built on NOAA’s 1991 to 2020 climate normals, which describe what a typical Boulder January looks like historically. This outlook is a different kind of document: it is NOAA’s current best guess about how this specific winter, shaped by this specific El Nino, might deviate from those historical averages. Because Boulder itself sits in the “equal chances” zone, the practical guidance in our Boulder weather and packing guide still holds: layer for cold, dry, and sometimes windy conditions, and do not assume this winter will be dramatically different from a typical one. Visitors weighing lodging or itinerary decisions around the festival’s confirmed dates and location should treat this outlook as background context, not a reason to change plans.
What we’re watching
NOAA’s Climate Prediction Center updates its seasonal outlook monthly, and its December release will narrow the picture further. We will also watch for the National Weather Service’s short range forecast in early January 2027, which is the product that will actually matter for packing decisions and for outdoor-exposed venues like Chautauqua Auditorium, covered in our venues guide.
