As we wrap up November and head into Thanksgiving week, the weather is serving up a mix of calm and intrigue. The lead up to the holiday will be pleasant enough, but there are growing signs of a big pattern shift waiting in the wings. Could Arctic air and long-awaited snowflakes finally arrive by the weekend? The details are still coming into focus, but we’ve got the latest outlook and what it could mean for your holiday weekend plans.
Category: Climatology (Page 1 of 64)
These posts contain information about the long-term weather patterns of Boulder County. Potential topics may include 30-day weather outlooks, El Nino/La Nina, and seasonal forecasts. You will find less about the day-to-day weather, with more focus on longer trends and patterns.
It’s been a tricky week for the weather models — and for us forecasters trying to make sense of it all. Our latest storm system has kept everyone on their toes, thanks to a complicated dance between two low-pressure systems across the Southwest. Each new model run seemed to rewrite the story, with big swings in outcomes and plenty of disagreement between guidance. But now that the storm is closing in, confidence is finally improving: we’re looking at a light precipitation event for the Front Range, with rain the only worry across the lower elevations.
Enjoy Wednesday’s sunshine while it lasts—it’s the calm before a complicated storm setup arrives tomorrow. A pair of low‑pressure systems are set to interact in a complicated manner late Thursday into Friday, leaving big questions about how exactly things will unfold across eastern Colorado. Read on for our latest thoughts on the developing late-week autumn storm headed for the Front Range.
After weeks of unseasonable warmth and bone‑dry skies, the Front Range is finally staring down a pattern shift this week. But will it deliver the moisture we’ve been waiting for—or just more wind and disappointment? In this update, we break down some stats from our parched autumn so far, and take a look at several storm systems moving through Colorado this week, one of which will offer an excellent chance of rain (and maybe some snow) in the Boulder-Denver area.
This week brings a stretch of unseasonably warm and quiet mid-November weather across the Front Range, with highs holding in the upper 60s to low 70s through Friday. However, a stronger cold front arrives in time for the weekend and it could finally deliver a shot of snow. Models remain split on the system’s track, leaving the Metro area with only modest odds to see accumulating snow, while the Mountains look primed for several inches. With records for Boulder’s latest first snowfall and longest snow‑free streak hanging in the balance, this is a setup worth watching as the week unfolds.
October 2025 was definitively warm and dry throughout the Front Range with the primary storm track remaining well north across Wyoming and Montana. The only real precipitation event during the month occurred on October 6th with some locations picking up more than one half inch of rain. Our first frost of the season occurred about two weeks later than normal, and to this day we’re still waiting for those magical first snowflakes across the lower elevations. Here’s a quick and colorful graphical recap of our weather during October and how it relates to climatology.
Sunday’s record-breaking November heat will give way to a dramatic cooldown on Monday, with temperatures plunging 20 to 30 degrees and wave clouds rolling in over the Front Range. The week ahead stays dry and mostly mild, but a few weak cold fronts will stir up some wind and day-to-day temperature swings. And while the forecast looks quiet for now, ensemble models are starting to hint at a colder, potentially snowier shift next week.
After a stretch of crisp, dry days to end the week, our weather is gearing up for a big warm-up this weekend, with near-record highs favored by Sunday. This developing warm and unfortunately dry pattern looks likely to stick around well into November. With each passing day, the odds grow that Boulder might challenge its record for the latest first snowfall.
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