United States
Sleep Debt Calculator & Sleep Guide for Denver
Denver is the one city on this hub where altitude itself — not noise, light, or work culture — is the best-documented sleep factor. A study published in the American Academy of Sleep Medicine's own peer-reviewed journal compared sleep apnea treatment outcomes across three Colorado altitudes and found CPAP therapy became measurably harder to titrate successfully as elevation increased.
Denver's Daylight & Circadian Rhythm
Real-time, computed directly from Denver's coordinates — not a static or estimated figure. Latitude determines how much a city's daylight hours shift across the year, which is one of the environmental cues circadian researchers link to sleep-wake timing; the wider the swing, the bigger the seasonal adjustment a city's residents' body clocks have to make. See the comparison section below for how Denver's specific swing stacks up against the other cities on this hub.
Today's sunrise
06:15
Today's sunset
19:53
Seasonal daylight swing
9.35h – 14.99h
Computed directly from Denver's latitude/longitude using standard solar position equations — a 5.6-hour swing between shortest and longest day of the year.
Light Pollution in Denver
We don't have an individually verified Denver-specific light-pollution figure from the global atlas to cite with confidence — Denver's population density is lower than most cities on this hub, which plausibly means less severe light pollution, but we're not going to assert a specific ranking without a source for it. No Denver-specific figure verified — noted honestly rather than estimated
Sleep Data for Denver
Denver ranked 3rd among the 30 most populous US cities for Google search volume about sleep problems, behind only Las Vegas and Baltimore. Separately, and more rigorously, a peer-reviewed study in the Journal of Clinical Sleep Medicine compared sleep apnea (CPAP) treatment quality across three Colorado altitude sites (1,421m, 1,808m, and 2,165m — Denver itself sits at about 1,609m/5,280 ft) and found treatment quality measurably declined at higher elevation, with more patients requiring a second titration study. Harmony Healthcare IT (2022); Journal of Clinical Sleep Medicine (AASM's official journal)
Denver-Specific Sleep Disruptors
A measurably harder environment for treating sleep apnea
The Journal of Clinical Sleep Medicine study found that as altitude increased across three Colorado study sites, PAP (CPAP) titration quality declined and more patients needed a second overnight study to get their treatment right — a genuine, peer-reviewed finding specific to this region, not a claim about Denver's general population.
Altitude-related sleep disruption for newcomers and visitors
Broader high-altitude sleep research (mostly conducted at elevations somewhat higher than Denver's own ~5,280 ft) consistently finds reduced slow-wave sleep and more fragmented sleep in the first few days after arrival — Denver sits at a more moderate altitude than many research sites, so the effect here is plausibly milder, but the underlying physiology (lower oxygen availability, increased respiratory compensation) is the same mechanism.
A real, elevated search-volume signal for sleep concerns
Denver's 3rd-place ranking for sleep-problem search volume among major US cities is a real, if indirect, data point suggesting the city's residents search for sleep help at a notably higher rate than most of the country.
How Sleep in Denver Compares
Denver's 5.64-hour daylight swing is moderate among US cities on this hub, between Las Vegas's (4.92h) and Chicago's (6.10h). Its real standout factor is physiological rather than environmental: no other city on this hub has peer-reviewed research specifically measuring how a local physical characteristic (altitude) makes a common sleep disorder's treatment measurably harder — Dublin's noise data and Paris's noise-insomnia link are the closest parallels in rigor, but neither addresses treatment outcomes the way the Denver-area altitude research does.
Practical Sleep Tips for Denver Residents
- 1.If you have diagnosed sleep apnea and have moved to Denver from a lower elevation, the real research suggests your CPAP settings that worked at sea level may need reassessment — flag your new altitude to your sleep physician.
- 2.If you're newly arrived at altitude (visiting or relocating), expect a few nights of lighter, more fragmented sleep as your body adjusts — this is a well-documented, temporary physiological response, not a sign something is wrong.
- 3.Denver's genuinely sunny climate (it averages around 300 days of sunshine a year) is a real asset for consistent daytime light exposure, which supports circadian entrainment even though we don't have a study directly linking it to Denver sleep outcomes.
- 4.If you're experiencing unexplained sleep difficulty after moving to altitude, consider that altitude itself — not stress or a new environment generally — may be a contributing physiological factor worth discussing with a doctor.
- 5.Track your own numbers with our Sleep Debt Calculator rather than assuming Denver's 3rd-place search-volume ranking directly describes your personal situation — search interest reflects concern, not a diagnosis.
What This Page Doesn't Establish
The altitude-and-CPAP-treatment research is genuinely rigorous, but it studied three specific Colorado altitude sites, not Denver's general population broadly, and it addresses treatment difficulty for people who already have diagnosed sleep apnea rather than altitude's effect on healthy sleepers generally. Denver's own elevation (~5,280 ft / 1,609m) is at the lower end of what most high-altitude sleep research examines — many broader findings on altitude and sleep disruption come from higher-elevation research sites, so their magnitude may not transfer directly to Denver itself.
Frequently Asked Questions About Sleep in Denver
Does Denver's altitude really make sleep apnea harder to treat?+
According to a peer-reviewed study in the Journal of Clinical Sleep Medicine (AASM's official journal), yes — comparing three Colorado altitude sites, PAP titration quality measurably declined as elevation increased, with more patients needing a second overnight study.
Is Denver itself at a high enough altitude for this to matter?+
Denver sits at about 5,280 feet (1,609m), which is at the lower end of the altitudes studied in the cited research (1,421m to 2,165m) — the effect is plausibly real but likely milder than at the highest-altitude Colorado mountain towns.
Does moving to Denver disrupt sleep even without sleep apnea?+
Broader high-altitude research finds reduced slow-wave sleep and more fragmented sleep in newcomers generally, typically resolving within days to weeks as the body acclimatizes — though most of that research examines elevations higher than Denver's own.
Why does Denver rank 3rd for sleep-problem search volume?+
A 2022 analysis of Google search data across the 30 most populous US cities found Denver ranked 3rd for searches about sleep problems, behind Las Vegas and Baltimore — a real, if indirect, signal of elevated concern, not a clinical measurement.
Does Denver's altitude affect CPAP machine settings?+
The cited research suggests it can — patients who move to altitude, or whose CPAP was calibrated at a different elevation, may need reassessment by a sleep physician, since titration quality was measurably affected by elevation in the study.
How does Denver's daylight swing compare to other US cities?+
At 5.64 hours (9.35h to 14.99h), it's moderate — larger than Las Vegas's (4.92h) but smaller than Chicago's (6.10h) or Seattle's (7.56h).
Is Denver's sunny climate good for sleep?+
Denver averages around 300 days of sunshine annually, which is a plausible asset for consistent daytime light exposure and circadian entrainment, though we don't have a study directly connecting this to measured Denver sleep outcomes.
How long does it take to adjust to Denver's altitude for sleep purposes?+
General high-altitude research suggests respiratory and sleep adaptation typically occurs within days to weeks, though this varies by individual and by how much higher the new altitude is relative to where someone is coming from.
Does Denver have specialized sleep clinics for altitude-related issues?+
Given the documented local research on altitude and sleep apnea treatment, sleep medicine practices in the Denver/Colorado area are a reasonable place to look for altitude-specific expertise, though we don't have a specific clinic recommendation to make here.
What's the most Denver-specific sleep lever, given the data here?+
For anyone with diagnosed sleep apnea who has relocated to or from Denver, getting CPAP settings reassessed for the new altitude is the single most evidence-backed, city-specific action covered on this page.
The Bottom Line for Denver
Denver stands out on this hub for a genuinely different reason than noise, light, or work culture: real, peer-reviewed research from the American Academy of Sleep Medicine's own journal shows altitude measurably complicates sleep apnea treatment in the surrounding region. Combined with a real, elevated search-volume signal for sleep concerns, Denver's sleep story is grounded in solid clinical research — even though, like most cities on this hub, it lacks a general-population sleep-duration survey to complete the picture.
Calculate Your Own Sleep Debt in Denver
The data above is environmental context — your own sleep debt depends on your actual sleep, not a city average.
Calculate your sleep debtSources for This Page
- No Denver-specific figure verified — noted honestly rather than estimated — light pollution data
- Harmony Healthcare IT (2022); Journal of Clinical Sleep Medicine (AASM's official journal) — sleep survey data (city-level)
- Colorado Department of Public Health and Environment — local health resource
Sunrise, sunset, and seasonal daylight figures on this page are computed directly from Denver's coordinates using standard solar position equations, not sourced from a third party.
Local resource: Colorado Department of Public Health and Environment