Lynn,

You have an excellent question because yes we all need to be taking care of our plants during this dry and warm fall and winter.   The last significant snow fall was Dec 3.   Typically you water once a month if no significant precipitation has happened. (What is significant?  About 1" water which is about 10" snow, depending on how heavy the snow is.)  

From Garden notes 657-5

Fall and Winter Watering
Watering trees in Colorado’s dry fall and winter months is extremely important. Moist soils hold more heat than dry soils, leading to additional growth in the fall and increased time for establishment. Adequate soil moisture also leads to better plant hardiness and ability to survive cold, dry winters. Aim to water trees and other woody landscape plants monthly when natural precipitation between October and April is less than an inch per month.

So watering this first week of January would be good.  The articles below will also indicate watering twice a month for areas that get winds or reflected heat from buildings.

Here's a good article to start with that gives tips of when to water and how much.

Fall and Winter Watering of Plants and Trees | Colorado State University Extension Website

Additionally, use these articles to pull information how to effectively water trees and shrubs.  

1706 – Fall & Winter Watering – PlantTalk Colorado

1751 – Fall and Winter Watering: During Drought – PlantTalk Colorado

For lawns, this is from Fact sheet 7.199

Winter watering may not be necessary
for established lawns. However, lawns
started within the last year are especially
susceptible to winter dessication injury and
need supplemental winter irrigation. Areas
of Colorado which experience open, dry
winters are more susceptible to winter grass
mites and dessication if occasional winter
irrigation is not applied.

Have fun writing your newsletter.

Jeffco Master Gardener Brenda