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The fact that surprises visitors: "we often get more snow in spring than winter. Historically, March averages out to be the snowiest month in Denver, followed by April." What that does not mean is a snowy city — "snow typically doesn't stay on the ground for very long in Denver," and anyone coming to play in it is told plainly, "you will have to go to the mountains for snow activities," where "the snow at the higher elevations doesn't melt until mid-June." So March is a big-snowfall month that mostly melts on contact at 1,600m, and a reliable snow month an hour's drive up. Our record agrees on the totals — 28.8cm in March, more than any other month — alongside 10°C days and 9.8 hours of sun, which is the combination that melts it.

Regulars from humid climates like Atlanta and the Southeast consistently note that even when Denver's temperature matches what they're used to at home, the dry air makes it feel genuinely different, with cooler overnight temperatures providing real relief that a humid climate wouldn't give at the same daytime high. Our row backs the hot, dry read, 32.7C reading as 32C at just 49 percent humidity, over 15.3C nights, with rain minimal at 26.3mm across 5 days. Regulars are specific that afternoon thunderstorms are a real, near-daily possibility this time of year, brief but capable of disrupting an outdoor plan even on an otherwise scorching day. The record: 11.9 hours of sun, a 14.4 kph wind and AQI 46.

Regulars are blunt about the spread this month can produce: early October is generally the better bet, still holding some fall color at lower elevations, while late October swings unpredictably between an 80-degree Fahrenheit afternoon and a foot of snow depending on the year. Our row backs a genuinely wide range, 20.6C by day over a real 0C-feeling night, with a modest 18mm of rain across 3.3 days alongside a real 6.4cm of early snowfall. The standard advice from regulars is layering that can come off in full sun and go back on in shade or after dark, since the swing happens within a single day as much as across the month. Dry air keeps humidity down to 50 percent even on a cold day. The record: 9.4 hours of sun, a 14.7 kph wind and AQI 31.

June storms are routine here and regulars turn them into a rule rather than a warning: the mornings are sunny and dry, the storms build mid to late afternoon, so hike early and be heading down by noon. Most are scattered and brief, under half an hour, with perhaps one week a summer of something more persistent. At altitude a single spring or early-summer day can hold rain, thunder, freezing drizzle and snow on the high ground, which is why the timing matters more than the forecast. Our row is otherwise a dry, bright month: 30.7C days over 13.4C nights at 51 percent humidity, 45.5mm across 6.2 days and 13 hours of sun. The record: a 15.9 kph wind and AQI 47.

Denver-forum threads on May draw a sharp elevation line: the city itself is warming fast by this point, while the resort towns up in the mountains - Vail, Aspen, Breckenridge - are stuck in what regulars call mud season, the snow melting away without the ground being dry enough yet for summer trails. Anyone chasing actual snow is told to just drive a high mountain pass instead; above roughly 9,500 feet there's still plenty of it through mid-May, less likely after the 22nd as the month wears on. Down in Denver proper the record backs the warming trend: 22.2C days, 7C nights, 74mm of rain across eight days, 11.6 hours of sun, and a late 4.4cm of snowfall still possible early in the month before the city's own spring properly arrives.