Quick Answer: When and Where to See the Northern Lights in Alaska
Fairbanks is the #1 aurora destination in the United States. Located directly under the Aurora Oval at 64.8°N latitude, Fairbanks experiences more than 200 aurora displays per year between August 21 and April 21. You need only Kp 2–3 for visible aurora overhead — compare this to Kp 6–7 needed for Colorado or Ohio. A 3-night stay in Fairbanks during the aurora season gives you a 90%+ chance of seeing the northern lights.
The best time to visit is March–April (warmer temperatures, good road conditions, and the equinox effect increases geomagnetic activity) or August–September (milder weather, fall colors, and the aurora returns after the midnight sun ends). Avoid December–January unless you're prepared for extreme cold (−20°F to −40°F) and very short daylight (3–4 hours).