The same advice, a different deadline
“Book in September or October” is true everywhere in Utah, but it does not mean the same thing in every city.
How much slack that advice actually gives you depends on where you live, because elevation changes how early the mornings turn cold enough to make roof work slower and less pleasant. Three cities, three elevations, three different real deadlines.
St. George: the longest comfortable window
St. George sits at 2,530 feet, the lowest and mildest of the three. NOAA’s historical record puts the average start of freezing mornings here around November 12, with the freezing-low window running through roughly March 14 — about sixty freezing mornings a year, concentrated in the coldest stretch of winter.
The average November low is 34.7°F and the average December low is 27.9°F, both comparatively mild for the state.
That November 12 date matters because it lands inside the typical install season rather than before it. St. George homeowners have real room into October and even the first part of November before frost becomes a regular morning condition, which is the longest comfortable window of the three cities here.
Cedar City: 3,140 feet higher, and it shows
Cedar City sits at 5,670 feet, more than 3,000 feet above St. George, and the difference in elevation shows up directly in the numbers. Cedar City’s average November low is 23.6°F — already below freezing on an average night — and its average December low is 16.3°F, roughly twelve degrees colder than St. George’s.
At that elevation, the comfortable window for hanging lights closes noticeably earlier in the fall than it does further south, and working a frosted or icy roofline is both slower and less safe.
Lehi: closer to Cedar City than to St. George
Lehi sits at 4,561 feet, lower than Cedar City but still high enough to change the calendar. Its average November low is 25°F and its average December low is 18°F — within a couple of degrees of Cedar City’s numbers, and well below St. George’s.
For booking purposes, Lehi behaves more like Cedar City than like St. George: the mild stretch into November that St. George gets does not really apply there.
What this means for booking
The practical takeaway is that “September or October” carries more urgency the higher up you live. In St. George, the calendar gives you a bit more room before the weather makes the job harder.
In Cedar City and Lehi, the colder average lows arrive earlier in the season, so the same September-or-October advice has less slack behind it — waiting into mid-November is a bigger gamble on frozen rooflines in those two cities than it is in St. George.
There is also a demand side to the calendar that has nothing to do with weather: everyone in a given city wants their lights on before Thanksgiving weekend, so the same few weeks that are comfortable for install work are also the weeks every homeowner is trying to book at once.
In a colder city that window is already short before demand is factored in; booking early is less about beating the frost and more about beating your neighbors to the same dates.
Takedown follows the same elevation logic
The same reasoning that sets the install window also applies at the other end of the season, in January. A roofline in St. George’s mild winter is a fairly normal takedown job most weeks. A roofline in Cedar City or Lehi, sitting well below freezing on an average December and January morning, is more often an icy roofline, and an icy roofline is slower and less safe to work on regardless of who is doing the work.
That is why takedown in the two higher, colder cities tends to get scheduled around actual conditions on a given week rather than locked to a fixed calendar date the way it can be further south.
Why the window is not the same as “when it’s safe to do it yourself”
None of this is only relevant if you are hiring someone. A homeowner planning to hang or take down their own lights faces the identical elevation math: a frosted or icy roofline is a fall risk whether the person on the ladder is a professional crew or the homeowner themselves.
If anything, the case for booking early or finishing early is stronger for a DIY job, since a professional crew works rooflines like this daily and a homeowner typically does not.
If you are not sure which window applies to you
Washington County communities near St. George — Washington, Santa Clara, Ivins and Leeds — sit at similar elevations to St. George itself, so the same comfortable window applies to them as well.
If your city is not one of the three covered here and you are unsure how early to book, the safest assumption is to treat higher elevation and colder average lows as reasons to move earlier, not later, and to ask directly rather than guess.
Wherever you are, the underlying logic is the same: book before the weather decides the schedule for you, not after. For what that install actually involves once it is booked — the design, what gets lit, and how the season and takedown run — see How Professional Christmas Lighting Works.
To check availability for a St. George property specifically, see Christmas Lights in St. George, UT.
Written by Michael Preston, Glow Forward Holiday Lighting. More from the blog