"Roger Coppock" wrote
"That's right. The fire season in the last 15 years or so has
increased more than two months over the whole Western U.S. So actually
78 days of average longer fire season in the last 15 years compared to
the previous 15 or 20 years," Swetnam says.

This is entirely consistant with the observation that first frosts and
last thaw times that bracket the winter months have also become respectively
delayed by a month and advanced by a month as the continent warms.

There are a variety of alternate markers that tell exactly the same story
world wide.

It also is entirely consistant with my memory of when the winter months
started and ended 40 years ago, compared to where they start and end now.