Northern lights in Anchorage in January
28%
of 4-night stays in January saw the northern lights at least once, by our estimate. On any one night the chance was 9%. January is one of the weaker months in Anchorage; February (41%) was much better.
How long to stay in January
Chance of at least one good night, by length of stay, Anchorage in January, 2015–2025.
In a typical January, the longest run of nights without a single clear, dark hour was 2 nights. A stay shorter than that can fall entirely into one cloudy spell.
Week by week in January (4-night stay)
- 1 Jan – 7 Jan37%
- 8 Jan – 14 Jan24%
- 15 Jan – 21 Jan21%
- 22 Jan – 28 Jan32%
January in Anchorage, year by year
Good nights in January, each year 2015–2025. The typical January had 2 good nights; the worst, 2024, had 0 and the best, 2017, had 7.
A good night = at least one hour that was dark (sun below −12°), mostly clear (NASA POWER cloud data, calibrated on FMI weather stations) and had a Kp index at or above the Kp 3.6 that Anchorage needs (GFZ Potsdam). These are estimates, not sightings. How it works
Other destinations in January
Anchorage ranks 21st of 21 popular aurora destinations for January (4-night stays, 2015–2025).
Yellowknife
99%Churchill
98%Fairbanks
89%Alta
88%Abisko
85%Kilpisjärvi
84%Aurora tours in Anchorage in January
A guide with a car can drive to wherever the clouds break. Booking for your first night leaves the rest of the stay to try again if it's cloudy.
Anchorage in January: questions
January is one of the weaker months in Anchorage; February (41%) was much better. In 2015–2025, 28% of 4-night stays in January saw the northern lights at least once, and an average January had 2.7 good nights (clear, dark and with auroras strong enough) out of 31. These are estimates from NASA cloud records and the Kp index, not sightings.
2 nights gave 17%, 4 nights gave 28%, 7 nights gave 41% odds of at least one good night in January (2015–2025). Even a week gave 41%, so treat the aurora as a bonus. In a typical January, the longest run of nights without a single clear, dark hour was 2 nights. A stay shorter than that can fall entirely into one cloudy spell.
About 13.7 hours a night with the sun more than 12° below the horizon, which is dark enough for faint auroras. Of those, 6.9 hours a night were mostly clear on average, and 22 nights in an average January had at least one clear, dark hour.
Auroras can appear any time it's dark, but activity usually peaks around midnight, roughly 22:00 to 02:00. With about 13.7 hours of darkness a night in January, start looking as soon as it's dark and stay out past midnight if you can. The live forecast shows tonight's best hour.