The earliest snow on record in the Denver area was 4.2 inches on September 3, 1961. and the second earliest snow fell on September 11-12, 1974, when a strong cold front brought 1.8 inches along with unseasonably cold temperatures. So as you can see, we’re actually overdue fro some snow.
And yes, you can shoot infrared in the Winter. While the Wood Effect produces the bright to white reproduction of the chlorophyll layer of deciduous plants, even non-deciduous plants and trees, like these evergreen bushes will show some effect and, to my mind, works perfectly with the snow on the ground.
This image was shot near Ft Collins, Colorado in the front yard of a friend. It was shot with an EOS 50D converted to infrared-only capture by LifePixel. Lens was the no longer available Tamron 18-250mm (at 55mm) with an exposure of 1/80 sec at f/8 and ISO 400. (The lens was replaced by the awesome Tamron 18-270mm f/3.5-6.3 Di II VC PZD.)
You can have your camera converted for IR capture, keeping in mind that this makes it an IR-only camera. When converting your camera to infrared by LifePixel, you can save a few days (7 vs 10) of processing by using coupon code “farace.”