Alaska Daylight Hours and Seasons, Explained

Updated November 2, 2026 · By the AK Circle team

Alaska's daylight swings dramatically through the year because the state is so far north. Anchorage gets about 19½ hours of daylight on the June solstice and about 5½ hours on the December solstice. Fairbanks ranges from nearly 22 hours to under 4. In Utqiagvik (formerly Barrow), the sun doesn't set for more than two months in summer and doesn't rise for about two months in winter.

Daylight hours by Alaska city

The figures below are approximate sunrise-to-sunset times on the solstices. Twilight adds usable light on both ends of the day, so even short winter days feel a little longer than the numbers suggest, and summer nights in Southcentral and the Interior never get fully dark.

For exact times on a specific date, use a sunrise/sunset calculator such as the U.S. Naval Observatory's or NOAA's solar calculator.

How fast the daylight changes

Near the March and September equinoxes, daylight changes fastest. Anchorage gains or loses more than five minutes of daylight per day around the equinoxes, and Fairbanks gains or loses about six to seven minutes per day. That adds up to more than half an hour a week, which is why spring in Alaska feels like the light is rushing back. Near the solstices, the change slows to seconds per day.

Midnight sun and polar night

Midnight sun means the sun stays above the horizon for 24 hours. In Alaska, that only happens north of the Arctic Circle (about 66.5° N), in places like Utqiagvik and Kaktovik. In Fairbanks, the sun does set briefly in June, but twilight stays bright enough to read outside at midnight.

Polar night means the sun doesn't rise above the horizon at all. Utqiagvik experiences this for roughly two months each winter. It isn't pitch black all day: around midday there's a period of twilight with a blue or pink glow on the southern horizon.

The real Alaska seasons

Many Alaskans describe the year less by the calendar and more by what's happening outside:

• Breakup (April to May): Snow melts, rivers break their ice, and everything turns to mud and slush. Potholes and frost heaves appear on roads. River breakup is a big event in the Interior; the Nenana Ice Classic is a long-running contest where people bet on the minute the Tanana River ice goes out.
• Summer (late May to August): Long days, green-up, salmon runs, gardening, and packed weekends. Mosquitoes arrive in force, especially in the Interior and wetlands.
• Fall (late August to September): Short but beautiful, with golden birch and aspen and red tundra. "Termination dust," the first snow on the mountaintops, signals that winter is coming.
• Freeze-up (October to November): Lakes and rivers freeze, and early winter can be gray. Ice isn't safe until it has been thoroughly checked.
• Winter (November to March): Snow sports, aurora, dog mushing and community events. Coastal areas like Anchorage and Juneau stay much milder than the Interior, where −20°F to −40°F cold snaps are normal.

Living with long summer days

Summer light is a gift, but it can disrupt sleep. Many Alaskans use:

• Blackout curtains or foil on bedroom windows
• A comfortable sleep mask
• A consistent bedtime even when it's bright out at 11 p.m.
• Planning big outdoor days around the long evenings, not just weekends

Living with short winter days

Low light in winter can affect mood and energy. Some people experience seasonal affective disorder (SAD), a type of depression linked to the seasons. Common approaches include:

• Get outside in daylight. Even a walk at lunchtime helps. Midday light in Alaska winter is low and soft, but it's still more than indoor light.
• Light therapy boxes. Many Alaskans use a bright light box (often rated at 10,000 lux) for a set time each morning. Talk to a health care provider about whether it's right for you, especially if you have eye conditions or bipolar disorder.
• Vitamin D. Your skin makes little vitamin D from winter sunlight at Alaska latitudes. Ask your provider whether testing or supplements make sense for you.
• Stay active and social. Winter clubs, ski trails, community events and regular plans with friends make a real difference.
• Keep a routine. Regular wake times and exercise help keep your body clock steady.

This section is general information, not medical advice. If low mood lasts more than a couple of weeks or affects daily life, contact a health care professional. In a crisis, call or text 988 to reach the Suicide & Crisis Lifeline.

Why does Alaska have such extreme daylight?

Earth's axis is tilted about 23.4 degrees. During the Northern Hemisphere summer, the North Pole tilts toward the Sun, so far northern places like Alaska stay in sunlight for most or all of the day. In winter, the pole tilts away, and high latitudes spend most of the day in darkness. The farther north you are, the stronger the effect, which is why Fairbanks has more extreme seasons than Anchorage, and Utqiagvik more extreme than Fairbanks.