Aurora Borealis in Weston, Canada Tonight

Aurora Borealis in Weston — What You Need to Know

Aurora Borealis & the Auroral Oval in Weston

Weston is located at 43.7°N, 79.5°W (geographic) and 53.0° magnetic latitude. This places it south of the typical auroral oval. The northern lights (aurora borealis) are visible during strong geomagnetic storms (Kp 7+), requiring a minimum Kp index of 7.

Note that Weston's magnetic latitude (53.0°) differs from its geographic latitude (43.7°) by 9.3°. 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 7 corresponds to a G3 geomagnetic storm. These are less common but can push the auroral oval significantly toward the equator.

Aurora Borealis Viewing Conditions in Weston

Even when the Kp index is high enough for Weston, 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 Weston

In Weston, 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 7+ storms are most frequent.