Sleep in Chicago: Winter Light, Sleep Studies

In short

Chicago’s daylight runs from just over 15 hours in June to about 9.1 in December, and winter cloud off Lake Michigan cuts the morning light your body clock needs. Sleep studies are ordered by a physician and usually covered by insurance with prior authorization. Northwestern Medicine’s Sleep Health Centers are the large AASM-accredited academic program.

Daylight and your body clock in Chicago

Daylight in ChicagoSunrise to sunset, local time (America/Chicago). Computed for latitude 41.9°N.

Mid-June

05:1520:29

15.2 h

Mid-September

06:3718:49

12.2 h

Mid-December

07:1416:22

9.1 h

Mid-March

06:5419:01

12.1 h

Longest day about 15.2 hours (Mid-June), shortest about 9.1 hours (Mid-December) — a swing of 6.1 hours. Clocks change twice a year (second Sunday in March, first Sunday in November).

Your body clock is set mainly by morning light, so the shape of these bars is the shape of your year: a 6.1-hour swing between the longest and shortest days changes when you feel sleepy, how easily you wake, and — for many people — mood. The guides below explain what to do with that.

What is different about sleeping in Chicago

Chicago winters are cold, windy and often grey, and the sun sets before 4:25 pm in December. The combination keeps people indoors and dims the light signal that sets the body clock. A short outdoor walk in the morning or at lunch does more for winter sleep than any evening routine.

The March clock change lands harder in the northern half of the US, where mornings are still dark. The daylight-saving guide explains how to shift gradually the week before.

O’Hare is one of the busiest airports in the world, and shift work is common in logistics, healthcare and hospitality — both covered in the guides linked below.

Getting a sleep study in Chicago

The rules are set at the national level. In short: In the United States, a sleep study is ordered by a physician — often a primary-care doctor or a sleep specialist — and is usually covered by health insurance when it is medically necessary, frequently after prior authorization. Medicare covers polysomnography and home sleep apnea testing under specific coverage rules, and covers CPAP for an initial trial period that continues only if the device is used consistently. Costs without insurance vary widely, with home tests generally costing far less than in-lab studies.

Full United States guide

Public and academic sleep centres

Where the public or academic system does sleep studies in Chicago — listed for orientation, not as recommendations. All require a referral.

Northwestern Medicine — Sleep Health CentersBoard-certified sleep specialists; adult and pediatric sleep disorders.
Rush University Medical Center — Sleep Disorders CareAcademic sleep disorders program.

AASM accredited sleep center directory — search for accredited facilities across the US.

Common sleep problems in Chicago — and how these guides help

Short winter days and low moodExplains why less daylight shifts your body clock and what morning light, timing and activity do about it.Winter Darkness, Short Days, and Your Sleep Clock changesWhy the spring change is harder, and a four-day plan to soften it.Daylight Saving Time and Your Sleep Shift work and night shiftsAnchor sleep, light management, caffeine timing and the drive home, for rotating and night rosters.Shift Work and Sleep: Coping With Night Shifts Insomnia — trouble falling or staying asleepWhat insomnia is, why CBT-I is the first-line treatment, and when to talk with a doctor.Insomnia: What It Is and What Actually Helps Snoring and sleep apneaThe signs, the risks, how testing works and the treatment options — so you can decide whether to ask for a study.Sleep Apnea: Symptoms, Risks, and Treatments

Questions people ask

How do I get a sleep study in Chicago?

A physician orders it — primary care or a sleep specialist — and insurance usually covers it with prior authorization. Accredited centres can be found through the AASM directory; Northwestern Medicine and Rush have academic programs.

Does Medicare cover a home sleep test in Illinois?

Medicare covers home sleep apnea testing and polysomnography nationally when its coverage criteria are met; the criteria do not vary by state.

Why is the March clock change so hard here?

Losing an hour when sunrise is already late means several days of waking in the dark. Shifting bedtime 15 minutes earlier for four nights before, and getting morning light after, softens it.

Sleep in Chicago: lake-effect winters, sleep studies, and where to start