Is it too late to trim evergreens in this area? Also, can I have my Maple trees cut back now?

You'll want to address this question to the helpful folks at the Kemper Gardening Center at the Missouri Botanical Gardens.

Some light trimming on evergreens and prune the maples back after the sap has run down.

Visit the Missouri Botanical Gardens, they maybe able to answer your questions.

You need to contact MOBOT directly with your questions.

My opinion... It's never too late to trim evergreens. I would wait to cut back maples until cold weather sets in for a while, as in January.

I don't think it's too late, especially with the warmer weather we've been experiencing.