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This Week in Colorado Weather: September 14, 2026

September 14, 2026 /

September is finally starting to feel like September again — but not before one last burst of late‑summer heat today. A sharp pattern shift arrives tonight, opening the door to cooler temperatures, daily storm chances, and a midweek surge of moisture that could make things interesting across parts of Colorado. We’ll also check in on a small wildfire in the San Luis Valley, track where the heaviest rainfall is most likely to fall, and look ahead to a weekend that may line up perfectly with rapidly peaking fall colors. Read on for all the details.

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Premium BoulderCAST Daily – Sun 09/13/26 | Returning to summer briefly ahead of an active pattern

September 13, 2026 /

Awarm front lifts north today, the remnants of yesterday's cold front. The front will bring in warmer southwest flow, warm advection, and temperatures today and Monday into the upper 80s to around 90 degrees. The above normal temperatures are short-lived, however, as cooler and more seasonal values will be felt Tuesday onward. But along with that, we'll see a more …

Premium BoulderCAST Daily – Sat 09/12/26 | Cooler for the start of the weekend

September 12, 2026 /

The weekend starts off quite comfortable. A backdoor cold front moved through this morning and is bringing with it cooler temperatures. Along with that, we'll see mostly sunny skies and just a slim chance of a storm. The majority of our day is void of any showers. This cool weather is short-lived. The front retreats and warmer air quickly returns. …

Boulder County Rolls Back Fire Restrictions as Extreme Drought Persists

September 11, 2026 /

Boulder County just rolled back its fire restrictions—right as we close the book on one of the hottest, driest, most fuel‑parching summers in recent history. The county says “improved conditions” justify easing the bans, yet rainfall has been almost impossible to come by within county limits, Extreme Drought now blankets 84% of the county, and fuel moisture is objectively worse today than when restrictions were last ramped up back in late June. It begs a very reasonable question: what exactly has improved? We break down the data behind the decision and examine why Boulder County’s fire environment remains primed as we step closer to autumn—historically one of our area’s most volatile fire seasons in recent years.

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Premium BoulderCAST Daily – Fri 09/11/26 | Mild in the 90s on this 9/11 Remembrance

September 11, 2026 /

Today marks 25 years since 9/11. We remember those who lost their lives on that tragic day, as well as those who had secondary repercussions from the fallout of the twin towers falling. On this Friday, we stay relatively quiet with highs around 90. We are going to get a fairly dry atmosphere in the afternoon, with relative humidity levels …

Premium This Weekend in Colorado Weather: A Quiet Finish to the Week Before Moisture Makes Another Move

September 10, 2026 /

We’re stepping into Thursday under clear bluebird skies and a legitimately refreshing start. Many spots along the northern urban corridor dipped into the 40s, while our station bottomed out at 48.5° — the coldest reading since June 16th. After nearly three months of relentless heat, even a brief flirtation with cool mornings is enough to trigger some early fall vibes. …

Premium BoulderCAST Daily – Wed 09/09/26 | Monsoon Slips South as a Front Pushes Our Temps Into the Comfortable Zone

September 9, 2026 /

The thin ribbon of monsoon moisture that had been draped across the Four Corners for days has sagged south, now pooled over New Mexico and far‑southeast Colorado. In its wake, a much drier westerly flow has taken over the Front Range, shutting down any meaningful storm potential. A shallow but punchy frontal boundary is sliding south across the Plains this …

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