Denver’s First Snow: What To Expect And When

Denver’s first snowfall marks a pivotal seasonal transition for residents and visitors alike. This annual milestone, defined as measurable snow of at least 0.1 inch, signals the end of fall and arrival of winter weather patterns in the Mile High City.

Understanding when snow typically arrives helps everyone prepare properly for changing road conditions, temperature drops, and the breathtaking transformation of the Colorado landscape.

1. Mid-October Marks The Average First Snow Date

The NWS notes that October 18 is the statistical average date for Denver’s first measurable snowfall. While some years meet this benchmark, others bring snow much earlier or significantly later. This wide variation is part of what makes Denver’s climate unique.

Longtime residents often look to mid-October as a practical time to switch to snow tires and prepare homes and gardens for the season ahead.

2. Record-Breaking Snow Arrivals

Denver’s snow timing can be wildly unpredictable! Denver’s earliest recorded measurable snowfall occurred on September 3, 1961, when 4.2 inches fell, an unusually early end to summer. At the other extreme, the latest first measurable snowfall was logged on December 10, 2021, setting a new record for the city.

These two dates highlight just how unpredictable Denver’s weather can be and why averages only tell part of the story.

3. Climate Shifts Changing Snow Patterns

While October remains the average, Denver’s snowfall record shows significant year-to-year variability. Some years bring September storms, while others hold off until late November or even December. Research by regional climate experts indicates that warming autumn temperatures may contribute to a subtle shift toward later first snows, though variability remains the defining characteristic.

Colorado’s changing climate means residents must be ready for both early flurries and delayed winters.

4. What Those First Flakes Actually Look Like

According to NWS data, Denver’s first measurable snowfall is often light, frequently less than an inch. These early events may dust grassy areas while leaving city streets mostly wet.

Higher elevations near the foothills typically record more accumulation than downtown, reflecting Denver’s varied topography. For many locals, the first snow is less about depth and more about the symbolic start of the cold season.

5. Preparing For The Season’s First White Blanket

The first measurable snowfall serves as a reminder for Denver residents to prepare for winter conditions. Safety officials recommend ensuring vehicles are equipped with snow-ready tires and keeping ice scrapers handy.

Gardeners often use this time to cover sensitive plants, as the first snow is frequently accompanied by freezing nighttime temperatures. While it is rarely the most severe storm of the season, the first snowfall sets the stage for the months of snowier weather to follow.