Aurora Borealis in Saint-Léonard
Canada · 45.59°, -73.59° · geomagnetic 54.9° · needs Kp 7
Tonight in Saint-Léonard
4%
Peak chance of a visible display tonight, from the same model the Revon app runs. Saint-Léonard needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 5.1. Short of the threshold, which is what most nights look like here.
Updated 2026-08-02 20:20 UTC
The next 30 nights in Saint-Léonard
Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 4%. Not one of the seven reaches the Kp 7 that Saint-Léonard needs, which is normal rather than unlucky — it averages 3.2 viable nights a year. The 23 nights past the seven-day window move with the 27-day solar rotation and are updated daily in the app.
Nights 8–30 unlock in the Revon app
See all 30 nights for Saint-Léonard
Revon aurora model over the NOAA Kp forecast and 27-day outlook
How often the aurora borealis reaches Saint-Léonard
3.2 nights a year, averaged across 10.0 years of records
| Storm level | Nights / year |
|---|---|
| Kp 4 | 83.4 |
| Kp 5 | 28.7 |
| Kp 6 | 9.3 |
| Kp 7 | 3.2 |
| Kp 8 | 1.2 |
NOAA planetary Kp, 2016-04-02 to 2026-03-30
Wait for an alert; do not book a week
At Kp 7, Saint-Léonard needs a severe geomagnetic storm before anything shows above the northern horizon. Storms that size arrive a handful of times per solar cycle and announce themselves a day or two ahead. Watching for one beats picking dates and hoping.
Hours of true darkness, month by month
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11.4 | 10.3 | 8.9 | 6.9 | 4.7 | 3.1 | 3.9 | 6.1 | 8.2 | 9.9 | 11.1 | 11.7 |
Solar declination and hour angle at −18°
Getting clear of the light
The sky over Saint-Léonard reads Bortle 8. Getting clear of the built-up area makes a visible difference on a marginal night.
- 56 km north-west — around Sainte-Adèle → Bortle 5
- 75 km north — around Saint-Côme → Bortle 4
Falchi 2016 World Atlas (DOI: 10.5880/GFZ.1.4.2016.001)
The months that actually deliver
Counting only nights that were both stormy enough and dark enough, May, September and August came out ahead in Saint-Léonard. That is storm season and darkness overlapping — the equinoxes tend to be geomagnetically active, and the nights are already long by then.
Darkest nights of the coming year
A bright moon washes out a weak display as effectively as street lighting. These new moons fall inside the Saint-Léonard viewing season.
- 13 Aug 2026
- 11 Sep 2026
- 11 Oct 2026
- 09 Nov 2026
- 09 Dec 2026
- 07 Jan 2027
- 06 Feb 2027
Where it is close to a certainty
If you would rather plan a trip than wait for a storm, the nearest place with genuinely frequent aurora is Nuuk, 2,469 km north-north-east in Greenland.
| Saint-Léonard | Nuuk | |
|---|---|---|
| Kp needed | 7 | 3 |
| Nights per year | 3.2 | 171.4 |
| Geomagnetic latitude | 54.9° | 72.6° |
Confirmed reports from this area
40 verified sightings were logged within 300 km of Saint-Léonard between 2015-01-01 and 2016-12-31. Rare is not the same as impossible.
Aurorasaurus verified positive reports
Where the horizon opens up near Saint-Léonard
The display sits low on the northern horizon, so what beats a better forecast is open ground facing that way. Height gets you above the town glow; water gives you an unbroken skyline. These are within a short drive of Saint-Léonard.
- Boisé Saint-Conrad — park3.8 km east-north-east
- Parc André-Laurendeau — park3.8 km east-north-east
- Les Écores — cliff4.7 km west
- Coteau de la Pinière — cliff5.0 km north-west
- Île Boutin — island5.5 km north-north-west
- Île Lapierre — island5.6 km north-north-west
Places from GeoNames (CC BY 4.0)
What to do with the daylight
Aurora watching is a night job, and in winter that leaves a short, bright day to fill. Close to Saint-Léonard you will find Tour de l'horloge, and for a day when the cloud sits low, Planétarium Rio Tinto Alcan, Biodome and Château Dufresne are indoors and near by.
Keep the daylight loose: the sky decides the evening, and the forecast can turn within a few hours.
Places from GeoNames (CC BY 4.0)
Where to stay
Anywhere on the outskirts of Saint-Léonard will do; what matters is being able to step outside and check the sky without a drive first.
- Howard Johnson Montreal 0.8 km from the centre
- Quality Hotel Anjou Olympic Parc 2.2 km from the centre
- Quality Hotel Montreal East 2.2 km from the centre
- Auberge Royal Versailles 4.3 km from the centre
- Hotel Le Prestige 9.6 km from the centre
- Quality Suites Laval 10.8 km from the centre
Places from GeoNames (CC BY 4.0) — confirm before booking
The last nights it was visible here
Nights in the last decade when the storm was strong enough for Saint-Léonard and the sky was dark enough to show it.
| Date | Peak |
|---|---|
| 2026-03-20 | Kp 7.0 |
| 2026-01-20 | Kp 7.67 |
| 2026-01-19 | Kp 8.67 |
| 2025-11-12 | Kp 7.33 |
| 2025-11-11 | Kp 8.67 |
NOAA planetary Kp
Know when it is worth going outside
Revon watches the Saint-Léonard forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in Saint-Léonard
Can you see the aurora borealis from Saint-Léonard?
Yes. On the last 10.0 years of NOAA Kp records, Saint-Léonard had about 3.2 nights a year when the storm was strong enough and the sky dark enough at the same time.
What Kp index do you need to see the aurora borealis in Saint-Léonard?
Kp 7. Saint-Léonard sits at geomagnetic latitude 54.9°, and the auroral oval only reaches that far from the pole once activity hits Kp 7. Storms that size occur about 3.2 nights a year.
When is the best time of year to see the aurora borealis in Saint-Léonard?
May, September and August. Those months scored highest once both conditions are counted together: geomagnetic activity and enough hours of real darkness.
Where can you escape the light pollution near Saint-Léonard?
The centre of Saint-Léonard reads Bortle 8. The nearest sky at Bortle 4 is about 75 km north around Saint-Côme. On a marginal night that drive matters more than the forecast does.
Where is the nearest place to Saint-Léonard with reliable aurora borealis?
Nuuk, Greenland — 2,469 km north-north-east. It needs only Kp 3 and averages 171.4 viable nights a year against 3.2 in Saint-Léonard.
Nearby towns
Forecasts for places within reach of Saint-Léonard.