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11th Annual BoulderCAST First Snowfall Contest
Ready to toss that first snowball of the season? Maybe you’ve already waxed your skis, shelled out for that pricey Epic Pass, or jumped the gun on snow tires (again). Well, hold onto your mittens—Boulder’s first big snow could be just around the corner, or not! Mother Nature has been playing tricks on us lately. In the past five years alone, we’ve seen both the earliest and latest first snows on record. But, what will 2025 bring? That’s where you come in.
We’re kicking off our annual First Snow Contest! Please take a look at Boulder’s snowfall history within, then submit your best guess for when the first measurable snow (≥0.1″) will fall in Boulder—and how much will accumulate. The closest guesses will win a selection of prizes!
*This contest is now closed to entries*
September 2025 brought a classic Colorado blend to Boulder and the Front Range: near-normal temps, wetter-than-average skies, and a lively mix of sunshine and storms. A standout precipitation event around the 23rd delivered soaking rain in the lowlands and the first real coating of snow to the Mountains. The month eased us gently into autumn, with crisp mornings, comfortable afternoons, and brilliant foliage lighting up the higher terrain. And yes—who could forget that dramatic wave of Canadian wildfire smoke that swept through, reminding us how connected we are to the broader arid landscape of western North America. Here’s a quick and colorful graphical recap of our weather during September and how it relates to climatology.
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This week’s weather in the Front Range will be a bit of a rollercoaster. After Sunday night’s soaking rain and snow, Monday kicks off with fog, drizzle, and stubborn clouds before a midweek warm-up brings back the sunshine. But don’t get too cozy: frost season is knocking on the door, and snow signals are starting to flicker in the long-range models. Read on for the full breakdown, including what to expect today, what time rain showers will return later in the day Monday, and when late-season gardeners should start watching for frost and snowflakes.
P.S. Don’t forget to submit your entry to our 2025 First Snow Contest which closes Tuesday night at midnight!
This content requires a subscription to BoulderCAST Premium.
This content requires a subscription to BoulderCAST Premium.
This content requires a subscription to BoulderCAST Premium.
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