Aurora Borealis in L'Assomption
Canada · 45.82°, -73.43° · geomagnetic 55.2° · needs Kp 7
Tonight's aurora forecast for L'Assomption
6%
Peak chance of a visible display tonight, from the same model the Revon app runs. L'Assomption needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 5.0. Short of the threshold, which is what most nights look like here.
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Updated 2026-09-08 10:35 UTC
Local aurora guide for L'Assomption
The aurora borealis is typically visible in L'Assomption when the geomagnetic activity reaches Kp 7 or higher. This level of activity is expected to occur approximately 3.2 nights per year.
At a geomagnetic latitude of 55.2°, L'Assomption is well-positioned for aurora viewing.
The historical record for aurora sightings in this region spans from 2016 to 2026.
The months of May, August, and September offer the best opportunities for viewing the aurora in L'Assomption.
These months align with periods of darker skies, increasing the chances of observing auroral displays.
L'Assomption experiences a Bortle 7 sky, indicating significant light pollution.
For darker skies, Bortle 4 conditions can be found approximately 54 km north-north-west near Saint-Côme, and Bortle 5 conditions are available about 48 km north near Saint-Jean-de-Matha.
Potential viewing areas with varied horizons include Parc de l'Agora, Parc du Barrage, Lac d'Or, Lac Béram, and Pointe aux Sauvages.
Areas near L'Assomption that offer distinct horizons include Parc de l'Agora, a park located 5.4 km north-west.
Further west-north-west, Parc du Barrage (park, 5.5 km) and the shores of Lac d'Or (lake, 7.3 km) and Lac Béram (lake, 7.4 km) provide different vantage points.
To the east, Pointe aux Sauvages, a headland 7.9 km away, offers another potential location.
Between 2015 and 2016, 39 verified aurora reports were recorded within a 300 km radius of L'Assomption.
The historical data indicates that nights with Kp values of 7.0 or higher, suitable for aurora viewing, have occurred on dates such as March 20, 2026; January 20, 2026; January 19, 2026; November 12, 2025; and November 11, 2025.
These dates represent instances where geomagnetic activity reached levels conducive to aurora visibility, based on historical Kp data spanning from 2016 to 2026.
Sources: Revon analysis of NOAA planetary Kp · Revon location dataset · Falchi 2016 World Atlas of artificial night sky brightness · GeoNames (CC BY 4.0) · Aurorasaurus verified positive reports
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