September kicks off with a mellow vibe across the Front Range — warm days and mostly dry skies are expected. But don’t let the quiet start fool you. Between drifting wildfire smoke, sneaky cold fronts, and a potential tropical system by the weekend, there’s more nuance in our forecast this week than meets the eye. Read on as we break down what to expect day by day, plus what might shake things up by the weekend.
The unsettled weather pattern isn’t done with us just yet—and that’s good news for the rain-starved Front Range. While recent days have underdelivered in most areas, this week still holds promise for more moisture and continued cool weather. We break down when and where the best rain chances will line up this week, why optimism is cautious, and what to watch for as the pattern turns warmer and drier heading into Labor Day Weekend.
If you’ve been quietly rooting for a late-season monsoon comeback, it might be time to recalibrate. Boulder’s summer has been historically dry, and this week won’t offer much relief, at least initially. A persistent ridge of high pressure is set to lock in more heat and keep moisture at bay. But don’t tune out just yet—there’s a subtle pattern shift coming that could open the door to cooler temps and better storm chances by the weekend. Let’s take a closer look.
Hint: All of the clues are related to Boulder, Denver, and/or Colorado weather. OK, well most of the clues…
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