December 2025 offers a packed skywatching calendar for observers in the Toronto area. From a final supermoon of the year to the Geminid meteor shower and a rare interstellar comet, there’s plenty to see. The Winter Solstice brings the longest nights, giving stargazers ample time to enjoy bright planets, sparkling winter constellations, and multiple meteor showers. Below is a comprehensive guide (with times in local EST) to all the notable celestial events this month – including where and when to look for each. Let’s explore what’s happening in the sky this December 2025!

Hello Stargazers! Crisp autumn nights are here, and October 2025 promises to be one of the most exciting months of the year for skywatchers. With the possibility of two comets, a reliable meteor shower, and even a chance of a rare outburst, the night sky will be brimming with wonders. Grab your telescopes, binoculars, or simply a blanket under dark skies — here’s your guide for what to see this month in Ontario.