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The shortened work week arrives with a bit of a plot twist as Tropical Storm Marie sends a surge of deeper moisture straight into Colorado. That boost will keep scattered storm chances alive through Tuesday before a midweek cold front briefly dries us out and knocks temperatures back into more comfortable territory. But the break won’t last — late‑week heat is set to rebuild quickly, and weekend guidance is already hinting at yet another unsettled pattern trying to form, with a fresh plume of subtropical moisture lurking on the horizon. This summer’s stubborn, underperforming monsoon looks determined to limp well into September. Read on as we unpack the setup and what it will mean for weather along the Front Range this week.
August 2026 was a month defined by brutal heat, episodic monsoon relief, intermittent smoke, and continued climatological extremes across the Front Range, with most of the West extending a long‑running warm anomaly that has defined the past year and a half. Boulder notched its 2nd‑warmest August on record, capping 15 consecutive months averaging above‑normal temperatures, and even tied its all‑time record high of 104°F during one of several extreme heat pulses. During the month, new records were also set for the number of 95° and 100° days in a single calendar year — a clear marker of how historically persistent the heat has been. The month also featured a brief but meaningful uptick in monsoon moisture, especially in the southern Denver Metro area, where localized downpours provided slight drought improvement and a temporary break from the otherwise parched pattern.
Here’s a graphical look at how August 2026 unfolded across Boulder, Denver, and the Front Range — and how it compared to climatology.
A stubborn late‑summer pattern refuses to budge across the West, and Colorado is once again caught in the middle — but this holiday weekend comes with a tropical twist. As Hurricane Marie drifts offshore of Baja California, pulses of subtropical moisture will begin sneaking into the state, boosting storm chances in the High Country and adding some intrigue to an otherwise familiar stretch of warm, southwest flow. If you’re heading outdoors for Labor Day weekend, especially in the Mountains, you’ll want to keep an eye on the sky — the atmosphere has a few surprises lined up.
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