Aurora tonight in Montreal

Can you see the aurora borealis from Montreal?

Montreal is well outside the normal aurora zone, so a display here requires a genuinely strong geomagnetic storm — which is exactly why the sightings that do happen make the news.

Montreal needs Kp 7, and sits at a latitude where the aurora is a storm event rather than a routine one. The advantage over Boston or Minneapolis is simple: it is further north, so the same storm produces a taller, brighter display here than it does a few hundred kilometres south.

Country

Canada

Magnetic latitude

45.5°N

Geographic latitude

45.50°

Aurora threshold

Kp 7

Light pollution

Bortle 8

Deep-dark nights / yr

365

Sun at solar midnight

67.9° below horizon

Midnight sun

none

When to look: the Montreal aurora season

Astronomical darkness — the sun more than 18° below the horizon, which is when the sky is genuinely black — occurs on all 365 nights of the year at Montreal's latitude. The season here is therefore set by weather and geomagnetic activity rather than by darkness: any month can deliver a display, and the northern winter is simply the part of the year with the most usable hours per night.

Even at mid-winter the sun only reaches 67.9° below the horizon at Montreal, and the nights stay dark enough for aurora watching right through the year. Here the practical constraint is never daylight — it is weather and how the geomagnetic field happens to be behaving.

Where to go in Montreal

The roads running north out of the city leave the light dome behind quickly, and the Laurentians give you dark, elevated ground to watch from.

Direction matters as much as darkness. The display will be over the magnetic pole, which from Montreal means the northern sky — so pick a viewpoint with nothing between you and that horizon, and put any streetlight behind you. Tonight's "best window" figure above is the first hour where cloud falls below about 40% inside this latitude's dark period.

What Kp do you need in Montreal?

Here is what each Kp value would actually put in Montreal's sky — the row that matters is the one at Kp 7, which is where this city's magnetic latitude of 45.5° places its threshold:

The most common reason people in Montreal miss a display is not a bad forecast — it is staying inside the city. At Bortle class 8, a Kp 7 event that would be obvious from open country can be completely invisible from a lit street. If the answer above says GO or MAYBE, treat the drive out of town as part of the plan rather than an optional extra.

How tonight's answer is calculated for Montreal

Tonight's verdict for Montreal weights five inputs: the live Kp forecast measured against this city's own Kp 7 threshold (35%), night-average cloud cover at 45.50°, -73.57° (25%), moon illumination (15%), the astronomical darkness window computed for this latitude (15%), and light pollution at Bortle class 8 (10%). The scoring method, its inputs and its failure modes are written up in full on our methodology page. No account, no app, no email address — everything above is computed in your browser from NOAA and Open-Meteo data. Anonymous analytics and Google's advertising script are the only third parties involved, both explained on the privacy page.