Best time to see the northern lights in Barrow, Alaska

Barrow gets aurora on 38.2 clear nights in a typical year. January is the best month at 10.51 of them, and aurora needs Kp 1 or higher, which the planetary index last reached on 21 March 2026.

These are typical-year figures: a 1996–2026 planetary Kp record crossed with a 2001–2020 cloud normal. They describe a normal year, not tonight — the live Barrow forecast shows the actual cloud, moon and darkness right now. Check tonight's forecast for Barrow →

🌌 Clear nights a year

38.2

Regular — 38.2 clear nights in a typical year.

🌟 Best month

January

10.51 clear nights in a typical year

⚡ Kp needed

Kp 1

Horizon threshold; last reached 21 March 2026

🧭 Auroral oval (model)

Overhead

Model estimate at Kp 1, magnetic latitude 70°

Month by month in Barrow

Astronomical darkness, the nights on which planetary Kp reached Kp 1 inside that darkness, the same count over the current solar cycle alone, and what the local cloud normal leaves of the long-run figure.

Month	Astronomical darkness	Opportunity nights	Since 2023	Mean cloud	Clear opportunity nights	Moon-free
January	12.58h	27.73	32.3	62.1%	10.51	53.1%
February	9.32h	24.31	28.5	66%	8.27	54.3%
March	4.73h on 65.9% of nights	15.77	19	64.2%	5.65	56.8%
April	No astronomical darkness	—	—	71.5%	—	—
May	No astronomical darkness	—	—	82.8%	—	—
June	No astronomical darkness	—	—	74.7%	—	—
July	No astronomical darkness	—	—	78.2%	—	—
August	No astronomical darkness	—	—	88.8%	—	—
September	3.37h on 35.9% of nights	7.72	7.33	91.1%	0.69	59.3%
October	7.96h	25	23.07	91.4%	2.15	56.1%
November	11.87h	24.47	23.35	84.3%	3.84	53.5%
December	13.57h	25.39	23.89	72%	7.11	53%

April, May, June, July and August never reach astronomical darkness at Barrow, so no Kp value makes them viewable there and they are excluded rather than scored.

Opportunity nights are the whole 1996–2026 record. In the current solar cycle alone (since 2023), January has averaged 32.3 rather than 27.73.

January: 12.58h of astronomical darkness a night
January: 27.73 nights reach the Kp threshold inside that darkness
January: 62.1% mean cloud leaves 10.51 of them clear
January: 53.1% of those nights are moon-free

Nearby in Alaska

The strongest locations in the same state, by clear aurora nights a year.

Venetie — 75.9 clear nights a year, Kp 1
Ambler — 74 clear nights a year, Kp 1
Allakaket — 71.7 clear nights a year, Kp 1
Alatna — 71.6 clear nights a year, Kp 1
Kobuk — 70.3 clear nights a year, Kp 1
Shungnak — 70.3 clear nights a year, Kp 1

Aurora season across Alaska →

How these numbers were made

Evaluated at: Barrow, 71.2906° N 156.7886° W — darkness and cloud are properties of that point, not of a region.
Darkness: sun geometric altitude at or below -18 degrees (astronomical twilight). 10-minute samples across every year of the Kp record (1996-2026), averaged per night of each month rather than sampled on one representative day.
Geomagnetic record: GFZ Potsdam planetary Kp index, 3-hourly, 1996-01-01 to 2026-09-07 — 89,661 intervals, licensed CC BY 4.0.
Cloud: NASA POWER SYN1DEG 20-year Meteorological and Solar Monthly & Annual Climatologies (January 2001 - December 2020), parameter CLOUD_AMT. A monthly mean, not a forecast.
Moon: A night counts as moon-free below 35% lunar illumination while the moon is up.
Auroral oval: NOAA auroral oval — model estimate, reported separately. The figure for this location is above, beside the measured record it never replaces.
Clear opportunity nights: clear opportunity nights = nights on which at least one 3-hour Kp interval falls inside local astronomical darkness and reaches the location’s horizon threshold, scaled by (1 - monthly mean cloud amount)
Dataset version: Version 2026-09-07, computed offline by seo-ops scripts/aurora-usa-best-time-data.ts.

The same dataset for every tracked city and state is published at US Aurora Season Climatology, and how the live forecast is built is on the methodology page. Kp record: GFZ Potsdam (CC BY 4.0). Cloud normal: NASA POWER.

Frequently asked questions

When can you see the northern lights in Barrow?

January is the best month, with 10.51 clear nights in a typical year out of 38.2 clear nights across the whole year. Every month except April, May, June, July and August carries some chance. April, May, June, July and August never reach astronomical darkness, so no Kp value makes them viewing months.

What Kp is needed to see the aurora from Barrow?

Barrow needs Kp 1 or higher for aurora on the northern horizon, Kp 2 for a noticeable display and Kp 3 for a bright one. The NOAA auroral-oval model places the oval overhead at Barrow once the planetary index reaches Kp 1. That is a model estimate; the dates on this page come from the measured Kp record instead.

Has the aurora ever been visible from Barrow?

Yes. In the 1996–2026 planetary Kp record the index reached the horizon threshold for Barrow, Kp 1, most recently on 21 March 2026. Whether anyone saw it also depended on the cloud, moonlight and darkness of that night, which the Kp record does not carry.