Can you see the northern lights in Idaho tonight?
Live aurora odds for Idaho — tonight's Kp versus the Kp 8.1 the state needs, plus where and when to look.
Tonight Idaho needs Kp 8.1; the current Kp is 3, so aurora odds over Idaho are low — Cosmik tracks it live, free.
🟠 Low odds over Idaho tonight
Tonight's Kp is below the Kp 8.1 Idaho needs. Set an alert and we'll tell you when a storm brings the aurora into reach.
Kp now
3
Tonight max
5
Idaho needs
Kp 8.1
Geomag. latitude
49.9°
Live NOAA SWPC data, refreshed every 30 min. Get an alert for Idaho →
🌌 Kp 5 forecast for Idaho tonight
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Aurora across all of Idaho
Idaho only sees the northern lights during major geomagnetic storms, which can strike any month but are most likely near the equinoxes (September–March). On those rare nights, the aurora appears as a faint glow low on the northern horizon rather than overhead.
Track the aurora in Idaho cities
Each city page shows its own live Kp verdict — the odds shift with your exact latitude:
- Northern lights in Boise · needs Kp 8
- Northern lights in Spokane · needs Kp 6.1
- Northern lights in Salt Lake City · needs >9
- Northern lights in Reno · needs >9
- Northern lights in Eugene · needs Kp 8.3
- Northern lights in Portland · needs Kp 7.5
Northern lights in Idaho — FAQ
Can you see the northern lights in Idaho?
Yes, on the right night. Idaho needs the planetary Kp index to reach Kp 8.1 for the aurora to appear low on the northern horizon. That happens during geomagnetic storms — Cosmik shows tonight's live odds above so you know before you drive out.
What Kp does Idaho need for the northern lights?
Idaho needs a Kp of about 8.1 for the aurora to become visible from a dark site with a clear northern horizon. That figure comes from the state's geomagnetic latitude (49.9°): the higher your geomagnetic latitude, the lower the Kp you need.
When is the best time to see the aurora in Idaho?
Look between about 10 pm and 2 am local time, on a clear, moonless night, from a spot with no light pollution and an open view to the north. The season peaks September–March, and geomagnetic storms are most frequent near the equinoxes. Cosmik tracks the live Kp so you can catch the exact night it spikes.
