Aurora Borealis in Idaho, United States Tonight
Aurora Borealis predictions for Idaho tonight — updated every 6 hours
30-Night Aurora Outlook for Idaho
First 7 nights from data, remaining nights available in the app
Aurora forecasts for other cities
Aurora Borealis in Idaho — What You Need to Know
Aurora Borealis & the Auroral Oval in Idaho
Idaho is located at 44.5°N, 115.4°W (geographic) and 51.0° magnetic latitude. This places it far from the auroral oval. The northern lights (aurora borealis) are only visible during extreme geomagnetic storms (Kp 9), requiring a minimum Kp index of 9.
Note that Idaho's magnetic latitude (51.0°) differs from its geographic latitude (44.5°) by 6.5°. This is because Earth's magnetic pole is offset from the geographic pole. For aurora forecasting, magnetic latitude is what matters — it determines how close you are to the auroral oval.
What is the Kp index?
The Kp index is a 0–9 scale that measures global geomagnetic disturbance. Higher Kp values push the auroral oval further from the poles — at Kp 3, aurora is common above 65° magnetic latitude; at Kp 7+, it can reach below 50°. A Kp of 9 means a G5 extreme storm — the most powerful category. These are rare (a few per solar cycle) but when they hit, aurora can be visible at surprisingly low latitudes.
Aurora Borealis Viewing Conditions in Idaho
Even when the Kp index is high enough for Idaho, several factors determine whether you'll actually see the aurora:
- Cloud cover — the single biggest obstacle. You need clear or mostly clear skies.
- Darkness — aurora is only visible when the sun is at least 6° below the horizon (civil twilight or darker).
- Moonlight — a bright moon (especially full) washes out fainter aurora displays. New moon nights are ideal.
- Light pollution — urban skyglow reduces contrast (Falchi et al. 2016). Getting even 15–20 km outside the city center makes a noticeable difference.
Best Time to See Aurora Borealis in Idaho
In Idaho, the best aurora viewing window is October through February, when nights are longest and darkest. While aurora can technically occur year-round, summer nights at 44° are too short and bright for reliable sightings. Watch for solar maximum years (roughly every 11 years) when Kp 9+ storms are most frequent.
Frequently Asked Questions — Aurora Borealis in Idaho
Can I see aurora borealis in Idaho tonight?
It depends on the current Kp index. Idaho needs a Kp of 9 or higher for aurora borealis to be visible. Check the live forecast above for tonight's prediction, or download the Revon app for real-time alerts.
What Kp index is needed for northern lights in Idaho?
Idaho is at 51.0° magnetic latitude and requires a minimum Kp index of 9 for aurora to be visible. The Kp index is a 0-9 scale measuring geomagnetic activity — higher values push the auroral oval further from the poles.
When is the best time to see aurora borealis in Idaho?
The best time to see aurora borealis in Idaho is October through February, when nights are long and dark enough for observation. Within those months, the hours between 10 PM and 2 AM local time typically offer the best chances.
How does the aurora borealis forecast work?
The forecast combines NOAA solar wind and Kp index data with a machine learning model to predict aurora probability for each location. It updates every 6 hours on the website and every 15 minutes in the Revon app, which also factors in cloud cover, darkness, moonlight, and light pollution.