Denver
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The first cold front of the season hit Colorado on Tuesday, and Denver's first frost of the upcoming winter is not far behind.
What to know: The median first frost — 36° or cooler — for Denver is Oct. 8, according to the Midwest Regional Climate Center.
Threat level: The potential for frost on the Front Range this week is minimal with lows in the 40s. But it could dip into the 30s Friday night.
Flashback: On Saturday, Denver set a record high for Sept. 30 at 91°.
The bottom line: Welcome to Colorado weather.